Page 1
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
Feature list
The ICL88xx family of single stage flyback controllers for constant voltage output is tailored for LED lighting
applications to meet the required performance. They oer power factor correction (PFC) and low total
harmonic distortion (THD) from low to full load conditions.
General features ICL8800, ICL8810, ICL8820
• Constant voltage (CV) output flyback topology with a feature set and operation targeting lighting
applications
• Optimized for PFC-flyback topologies with secondary side regulation (SSR) operation, primary side
regulation (PSR) possible
• Supports universal input voltage (90 VAC to 300 VAC, 45 Hz to 66 Hz) and DC input voltage operation
• High power factor low THD performance across wide load and input AC line range
• Quasi-resonant operation with continuous conduction mode (CCM)-prevention and valley switching
discontinuous conduction mode (DCM) in mid to light load
• Adjustable max on-time – limits input power and current allowing safe-operation under low line condition
• Comprehensive set of protections: Internal overtemperature protection (OTP), output overvoltage
protection (OVP), overcurrent protection (OCP), brown-in and brownout protection, open loop protection,
input overvoltage protection
• So-start to reduce stress during turn-on
• External start-up circuit control signal with Vcc support in light load operation
• Reduced gate driver output voltage during start-up sequence and burst mode allowing smaller V
• Burst mode for very light loads and low system standby power consumption
• Jitter function on DC input to ease electromagnetic interference (EMI) testing for emergency lighting
Additional features ICL8810, ICL8820
cc
cap
• Burst mode for very light loads and low system standby power consumption
Additional features ICL8820
• Jitter function on DC input to ease EMI testing for emergency lighting
Potential applications
PFC-flyback CV
• LED driver and luminaries up to 125 W
• Adapter, charger, flat TV, all-in-one PC, monitor up to 125 W
Datasheet
www.infineon.com 2021-04-01
Please read the Important Notice and Warnings at the end of this document Rev. 1.0
Page 2
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
Product validation
VOUT +
VOUT-
L
N
CMC
DMC
Figure 1 Flyback-SSR-CV
L
N
CMC
DMC
VIN
VCC
ICL88xx
VCC
ICL88xx
TD
GND
ZCD
GD
CS
VS
ZCD
GD
CS
VS
CoolMOS
VOUT +
VOUT-
CoolMOS
VIN
GND
TD
Figure 2 Flyback-PSR-CV
Product type Package Ordering code
ICL8800 PG-DSO-8 SP003135776
ICL8810 PG-DSO-8 SP005418406
ICL8820 PG-DSO-8 SP005418407
Product validation
Qualified for applications listed above based on the test conditions in the relevant tests of JEDEC20/22.
Datasheet 2 Rev. 1.0
2021-04-01
Page 3
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
Description
Description
The ICL8800, ICL8810 and ICL8820 is a voltage mode controller for flyback topologies operating in quasiresonant mode and valley switching DCM. It is designed for low and high power lumen LED driver, requiring
high power factor and eiciency. The flyback controller is capable of controlling SSR-CV an PSR-CV topologies.
Oering a wide usage in low cost applications where a PFC functionality in dual stage topologies is required.
For lighting applications, the IC oers a wide power range as well as a comprehensive set of protections,
including a power limitation. The IC is easy to design in and requires a minimum number of external
components.
The gate driver current enables reasonable designs up to 125 W with state-of-the-art MOSFETs. The system
performance and eiciency, especially in light load conditions, can be optimized using Infineon CoolMOS™ P7
power MOSFETs.
ICL8810 and ICL8820
The integrated burst mode function allows designs with a very low standby power consumption and small
output ripple during standby mode and very light loads.
ICL8820
The jitter function eases the design of emergency lighting LED drivers without additional circuitry to improve
EMI performance.
Datasheet 3 Rev. 1.0
2021-04-01
Page 4
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
Table of contents
Table of contents
Feature list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Potential applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Product validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
3.1 Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2 Burst mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3 Input voltage detection and protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.4 Zero crossing detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.5 Power factor correction and THD correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.6 Frequency jitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.7 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.8 Power limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.9 Overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.10 Overcurrent protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.11 Output overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
3.12 Open loop protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.13 VCC protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.14 Fault reaction and flow chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.15 Adjustable functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
4 Electrical characteristics and parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.2 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.3 DC electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.3.1 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
4.3.2 Zero crossing detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.3.3 Voltage sense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.3.4 Input voltage detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
4.3.5 THD configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.3.6 Current sense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.3.7 PWM generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.3.8 Gate driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.3.9 Clock oscillators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.3.10 Temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Datasheet 4 Rev. 1.0
2021-04-01
Page 5
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
Table of contents
5 Package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Datasheet 5 Rev. 1.0
2021-04-01
Page 6
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
1 Pin configuration
1 Pin configuration
ZCD
VS
VIN
TD
Figure 3 Pin configuration
Table 1 Pin definition and function
Symbol Pin Function
ZCD 1 Zero crossing detection
This pin is connected to an auxiliary winding via a resistor to detect the zero crossing
of the switching current. When the zero crossing is detected, the controller initiates a
new switching cycle. The resistor from ZCD pin to the auxiliary winding is used to set the
maximum on-time.
1
2
3
4
ICL88xx
PG-DSO-8
8
7
6
5
VCC
GND
GD
CS
VS 2 Voltage sense
This pin is connected to the feedback circuit.
VIN 3 Input voltage detection
This pin is used to measure the AC or DC input voltage for power limitation, input OVP,
brown-in and brownout.
TD 4 THD correction
This pin is used to set the THD correction using a resistor to GND. The voltage on this pin
can be used to control an external start-up circuit.
CS 5 MOSFET current sense and secondary side over voltage protection
This pin is used for primary side over current protection. A series resistance between
pin and shunt resistor is used to tune the secondary side over voltage protection for the
flyback topology.
GD 6 Gate driver
This pin controls the gate of the MOSFET.
GND 7 Ground
This pin is connected to ground and represents the ground level of the IC for the supply
voltage, gate driver and sense signals.
VCC 8 Power supply
This pin supplies the IC.
Datasheet 6 Rev. 1.0
2021-04-01
Page 7
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
2 Block diagram
2 Block diagram
TD
VIN
VS
Over voltage protection
+
-
V
OVP
+
-
V
BI
+
-
V
BO
+
-
V
UV
1.6 V
R
=
PU
500Ω
AC sync and BI/BO
AC/DC detection; Input
voltage Level detection
Fault control
THD
adjustment
THD configuration
T
j
External
startup circuit
control
Thermal protection
Thermal Protection
CS protections
Burst control
(ICL8810 &
Blanking
SQ
time
R
Blanking
time
Pulse generation
and THD
correction
+
-
V
OCP2
+
-
V
OCP1
Pulse generation &
mode change
CS
I
OVP
ZCD
GD
ICL8820)
A
I
ADC
Decimation
Powerlimitation
and jitter
DAC
(ICL8820)
Digital state machine
VS open loop protection
+
Blanking
time
-
V
ovp
S Q
R
Supply, reference & biasing
3.3 V
Reference/
Selfsupply
V
monitoring
CC
+
V
UVLO
-
+
-
V
OVLO
Figure 4 Block diagram
GND
VCC
Datasheet 7 Rev. 1.0
2021-04-01
Page 8
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
3 Functional description
These sections describe the listed functions in detail.
3.1 Operating modes
The controller operates in voltage mode to optimize the power factor. It also autonomously selects the best
mode of operation based on operation conditions like input voltage and input frequency as well as load
conditions.
The supported modes are:
• Quasi-resonant mode (QRM)
This mode controls the on-time and maximizes the eiciency by switching on at the valleys of the ZCD
signal. This ensures zero-current switching with a minimum of switching losses.
Figure 5 Example of the switching waveform in the first valley
• Burst mode for ICL8810 and ICL8820
Operation in burst mode to increase the eiciency in light load operation and to extend the power range for
wide range input voltage designs. Enables very low standby power.
At highest relative power, the controller operates in voltage mode with constant on-time in QRM, switching at
the first valley. The maximum on-time can be tuned using the ZCD series resistance to adjust the maximum
relative power.
In QRM, the operating frequency depends on the QR resonant frequency of the transformer and the MOSFET.
To reduce relative power, the controller reduces the on-time. At certain relative power levels, the controller
also starts increasing the valley to avoid high frequencies. The switching frequencies remain within a range of
typically 20 kHz to 150 kHz depending on component selection.
The on-time is compensated to ensure a constant relative power for the change of the valley.
The o-time of the controller is limited to TO = 47 µs to ensure a minimum switching frequency outside the
audible range.
To achieve lowest relative output power, the ICL8810 and ICL8820 enter a burst mode with a repetition
frequency of approximately four times the AC input frequency.
Datasheet 8 Rev. 1.0
2021-04-01
Page 9
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
Figure 6 Exemplary switching characteristics versus relative power for a flyback application
with an QR oscillation period of 1.6 µs for a line frequency of 50 Hz for ICL8810 and
ICL8820
To avoid fast changes in the selected valley, for example multiple subsequent changes of the valley during one
AC half-wave, the IC uses a valley hysteresis. During each half-wave, the IC measures the required valley to fulfill
the power demand for a given AC input voltage and applies the minimum valley for the next half-wave. During
this half-wave, the IC adjusts the on-time to stay in the calculated valley. In this way, the number of valley jumps
is limited to a minimum.
In addition, if a load jump is detected, the valley number is adjusted immediately and set to the new minimum
value in the next AC half cycle. Since in some load and line conditions valley jumps are unavoidable, this IC uses
an asymmetric hysteresis to minimize the impact of a changed valley on the input current of the converter. If
the valley has to be corrected down, it happens immediately, but changing the valley up either happens on load
jumps or at the start of the next AC half-wave.
Datasheet 9 Rev. 1.0
2021-04-01
Page 10
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
Figure 7 Valley selection hysteresis
Feedback loop
The pulse generation is based upon the current drawn out of the VS pin. This method has shown better noise
immunity.
The VS-current is exponentially mapped from 200 μA to 600 μA over the entire pulse width range including burst
mode. In the range 20 μs to 1 μs, the mapping is relatively well exponential with a halving of the pulse duration
per 50 μA opto-current.
Figure 8 Mapping of the on-time vs the current out of the VS-pin
Datasheet 10 Rev. 1.0
2021-04-01
Page 11
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
To ensure proper operation of the feedback loop, a 12 kΩ resistor must be connected from the VS pin to ground.
The minimum current drown out of this pin (current through the opto coupler plus the current of the 12 kΩ
resistor) results in maximum power transfer, and the maximum current out of the VS pin results in loading to
the smallest operation point. To achieve the best THD and PF results, a low crossover frequency of a few Hz is
recommended.
Figure 9 VS pin circuit
Datasheet 11 Rev. 1.0
2021-04-01
Page 12
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
3.2 Burst mode
Only valid for ICL8810 and ICL8820.
Burst mode extends the controller's power range for very low loads and enables very low standby power
consumption.
The IC wakes up at a fixed repetition frequency of approximately four times the input line frequency and
decides based on the VS signal, if pulses are necessary to keep the output in regulation range. The duty cycle of
each burst is determined by the filtered feedback from the external control loop. The IC uses the current flowing
out of the VS pin to provide feedback to the IC. This method tends to be less noise sensitive and leads to a very
small voltage change on the pin throughout the whole power range.
Figure 10 Relation of the feedback current to the duty cycle in the flyback CV topology
Based on the power requested by the VS pin, the IC is capable of skipping entire generations of bursts to keep
the output in tight regulation range. The missing pulses can lead to a drop of the Vcc voltage. To prevent an IC
restart due to too low supply voltage, two mechanisms are implemented to overcome this issue:
• In addition to the burst mode wake-up according to the control loop, a higher priority V
threshold may trigger a burst start if VCC drops as low as V
until VCC increases up to V
VCCburst
again.
VCCwake
. The controller continues with the burst
wake-up
CC
• In parallel, the TD pin lowers its voltage to allow an external start-up circuit to charge the VCC cap until
V
VCCburst
is reached.
This burst mode control allows tight output regulation and reduces the standby power since no unnecessary
pulses are generated. In addition, it allows the use of a small VCC capacitor.
To save energy and lower the standby power consumption, the gate driver operates during burst mode with a
lower gate driver level of 7 V.
Datasheet 12 Rev. 1.0
2021-04-01
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ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
3.3 Input voltage detection and protection
The controller detects the AC or DC amplitude using an ADC between VBI and V
. The averaged input voltage
VINOV
level is used for power limitation and the brown-in and brownout. In addition, the Vin pin voltage is necessary to
enable the jitter function (ICL8820 only) for DC input. Theses conditions are checked before start-up and during
operation.
In addition, the VIN pin has an input OVP threshold of V
where the IC stops switching and waits until the operating conditions are met again. In case of V
and a short protection with a threshold of V
VINOV
VINshort
VINshort
, the IC
enters a shorter restart cycle of 25 ms. This can be used to achieve lower standby power by actively disabling
the IC, but still providing a quick reaction to a turn-on signal.
The brownout and brown-in thresholds of VBO and VBI, respectively, ensure a proper operation at low input
voltages.
L
PFC
N
Figure 11 VIN pin circuit
VIN
Datasheet 13 Rev. 1.0
2021-04-01
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ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
3.4 Zero crossing detection
To minimize switching losses, the controller initiates a new switching cycle when the current through the
transformer becomes zero during the o-time of the MOSFET. This time is approximated by detecting the
voltage change of the separate ZCD winding/auxiliary winding from positive to negative level, which represents
a voltage of zero at the inductor windings.
The first occurrence of this condition marks the end of the demagnetization of the flyback transformer and the
end of the current flow through the secondary side diode.
For medium to low power levels, the controller switches not at the first occurrence, but counts the number
of zero crossings until a desired valley is reached. Even if the valley is not measurable, the IC extrapolates the
ringing time to stay in the valley switching.
Figure 12 Windings of a flyback transformer
A threshold with hysteresis, V
for increasing level and V
ZCDUp
for decreasing level, is used to detect the
ZCDLow
change of the transformer voltage. A resistor connected between the auxiliary winding and the ZCD pin limits
the sink and source currents of the sense pin when the voltage of the auxiliary winding exceeds the internal
clamping levels V
(e.g., during start-up), an internal start-up timer will initiate a new cycle every t
pclp
and V
of the IC. When the sensed voltage level of the auxiliary winding is not suicient
nclp
aer turn-o of the gate
Rep
driver.
The ZCD resistor can be used to change the maximum on-time of the controller to limit the power transfer by
the system. The maximum on-time for a ZCD peak to peak clamp current of 1.2 mA is 20 µs and scales linearly
with lower clamp currents as it can be seen in Figure 13.
A very tight limitation of the power by the on-time limits the ability of the system to quickly recover from large
load jumps. The adjustment of the TD resistor can mitigate the influence on the THD performance caused by
changing the maximum on-time.
For wide range designs, an inductor of around 600 μH and for narrow range designs 1000 μH is recommended to
utilize the full capabilities of this IC.
Datasheet 14 Rev. 1.0
2021-04-01
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ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
Figure 13 max on-time versus ZCD current
Datasheet 15 Rev. 1.0
2021-04-01
Page 16
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
3.5 Power factor correction and THD correction
The gate driver GD is used for driving the power MOSFET in voltage mode by on-time control. Suppressing the
output ripple with the external feedback loop results in a quasi-constant on-time ton during the AC half-sine
wave. This already ensures a basic high power-factor and low THD performance.
In addition, the ZCD pin is used for a THD correction function that extends the pulse width of gate signal
according to the detected I
zero crossing.
Figure 14 shows the THD correction principle. During low input voltage levels, the on-time of the MOSFET is
increased to minimize gaps in the line current during zero crossing of the line voltage and to improve the THD
of the input current. This THD correction set with the TD resistor. The voltage on the TD pin (2.15 V or a 68
kΩ resistor from TD to ground) is measured at the start-up and is internally multiplied with the measured I
current. The result is handed over to the pulse generation block inside the IC to create the optimized waveform.
In rare cases (small transformer inductance and small capacitor output capacitance which results in a high
oscillation frequency), a lower value resistor down to 27 kΩ might result in a better THD performance.
. This optimizes the input current waveform, especially in the area near AC voltage
ZCD
ZCD
Figure 14 THD improvement – automatic pulse width extension
Datasheet 16 Rev. 1.0
2021-04-01
Page 17
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
3.6 Frequency jitter
Only valid for ICL8820.
A jitter function implemented into the IC for DC input voltage eases the design according to EN50172
(Emergency Lighting), which covers the requirements of the radio disturbance according to the EN55015 during
mains DC input voltage for emergency lighting.
A DC input voltage usually causes a flyback to operate at a single frequency resulting in the measured EMI
spectrum being very high. To avoid this, the IC starts varying the frequency of the gate signal, if a DC voltage
is detected at the VIN pin. This added jitter spreads the peak and reduces the EMI spectrum. This function is
implemented by an additional triangular pattern injected into the internal PWM generator with a frequency
of approximately 222 Hz while still adjusting the frequency to maintain the desired output voltage. This
manipulation of the internal control loop results in a 5 kHz to 10 kHz jitter of the run frequency dependent on
the load and line condition.
Figure 15 Added jitter function
Datasheet 17 Rev. 1.0
2021-04-01
Page 18
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
3.7 Start-up
As long as the voltage on the VCC pin is below the V
the V
threshold is reached, the controller senses the resistor at the TD pin and the input voltage at the VIN
CCon
threshold, the controller consumes I
CCon
VCCstart
. As soon as
pin.
Aer checking that the start conditions are within the limits (for example input voltage for brown-in, junction
temperature), the ICL88xx starts switching. The initial on-time is based on the sensed input voltage. In this
phase, the frequency is variable and the IC requires a current of ICC plus the gate driver current. The reduced
gate driver voltage V
the so start, the on-time is increased every 280 μs up to a maximum on-time of t
feature enables reducing the VCC capacitor without compromising the time-to-light. In
GDred
. The control switches
ON_max
to QRM as soon as a suicient ZCD signal becomes available.
The start-up is considered successful as soon as the feedback current requires less power compared to the
internal start-up ramp. At the end of the start-up or aer 15 ms at the latest, the gate driver level is increased to
the voltage level VGD for normal operation to achieve the best possible eiciency for the given power MOSFET.
External start-up cell control:
Aer the measurement of the TD resistance to ground, the pin remains on a high level. The voltage is dependent
on the used resistor. It can vary between 0.99 V and 2.33 V. The high level is maintained as long as the IC has a
suicient VCC supply. For the ICL8800 the start-up circuit is only active at the initial start-up or during a restart of
the IC.
For ICL8810 and ICL8820: While in burst mode, the pin is reset to low when the VCC drops below V
is set high again if VCC exceeds V
VCCburst
. The maximum capacitive loading of this pin is 1 nF.
VCCwake
and it
To assure a proper functioning of the IC, a resistor of 12 kΩ has to be placed from VS pin to GND.
Voltage
Normal startup
t
start,max
Voltage
Output short startup
t
start,max
t
out,charge
Output setpoint
V
out
V
VCCON
(12.5V typ)
V
UVOFF
(7V typ.)
t
VCCON,charge
t
VCC,holdup
V
VCC
Figure 16 Waveforms of VCC and V
Output setpoint
V
VCCON
(12.5V typ)
V
UVOFF
time
during normal start-up and in output short condition
out
(7V typ.)
V
VCC
V
t
VCCON,charge
out
t
VCC,holdup
time
Datasheet 18 Rev. 1.0
2021-04-01
Page 19
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
3.8 Power limitation
Based on the mean voltage detected at the VIN pin, the relative power transfer is limited as seen in Figure 17.
The power limitation is divided into three sections:
• Voltage range between 0.4 V and 0.6 V: A steep limitation curve to avoid high currents and enable good
dynamic behavior above brownout threshold.
• Voltage range between 0.6 V and 2 V: Nearly linear limitation of the output power dependent of Vac.
• Voltage range above 2 V: An input over voltage triggers a restart of the system .
Figure 17 Exemplary representation of the power limitation versus input voltage
This limitation is implemented in the internal pulse generation block by limiting its output to a calculated
maximum value.
If an output undervoltage event occurs in the flyback topology, either the power limiting limits the delivered
power to the output, allowing large capacitors to be charged, or an insuicient VCC supply triggers a restart.
3.9 Overtemperature protection
ICL8800, ICL8810 and ICL8820 oers a temperature protection using an internal temperature sensor. This
feature protects the IC from too high temperatures. The protection starts at an internal temperature of T = 130
°C.
Datasheet 19 Rev. 1.0
2021-04-01
Page 20
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
3.10 Overcurrent protection
The input overcurrent protection level 1 is performed by means of the cycle-by-cycle peak current limitation to
V
. A leading edge blanking t
OCP1
edge spike. If the measured current reaches the threshold of 0.6 V at the CS pin, the IC turns o the gate.
The input overcurrent protection level 2 is meant for covering fault conditions like a short in the transformer
primary winding or transformer core saturation. In this case, overcurrent protection level 1 does not limit
properly the peak current due to the very steep slope of the peak current. Once the threshold V
the CS pin is reached within the time window of t
prevents the IC from falsely switching o the power MOSFET due to a leading
LEB
of 1.2 V at
, the protection is triggered.
OCP2
OCP2
Figure 18 Timing overview of the OCP1 and OCP2
Datasheet 20 Rev. 1.0
2021-04-01
Page 21
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
3.11 Output overvoltage protection
The ICL88xx has additionally to the feedback loop a second output overvoltage protection. This protection
uses the ZCD clamp current during the demagnetization time to protect the output. The ZCD clamp current is
internally converted to a current out of the CS pin with the conversion ratio n
resistance, the V
AUX winding
threshold triggers the protection.
OCP1
ZCD
CS
series resistor
OCP1 threshold
. Depending on the CS series
ZCDOVP
EMI filter
OVP
shunt resistor
Figure 19 Flyback secondary OVP
Due to this protection, the voltage at the CS pin is not zero during the demagnetization, but mirrors the
reflected output voltage.
Datasheet 21 Rev. 1.0
2021-04-01
Page 22
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
Figure 20 Flyback CS waveform
3.12 Open loop protection
An open feedback loop results in maximum power transfer aer the so-start. The flyback secondary over
voltage protection is triggered once the over voltage threshold is exceeded for a longer time than the related
blanking time. This causes an auto-restart.
In the case of an open VS pin, due to the VS pin sourcing, a current of 1 µA out of the IC during normal operation,
the voltage at the VS pin rises. The VS pin voltage is compared to the over voltage comparator threshold
V
VSOVOFF
protection blocks any switching. A restart may occur if the VCC voltage drops below the undervoltage lockout
unit (UVLO) threshold.
. If the voltage exceeds the threshold for longer than the related blanking time, the overvoltage
Datasheet 22 Rev. 1.0
2021-04-01
Page 23
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
3.13 VCC protections
An UVLO is implemented that ensures a defined enabling and disabling of the IC operation depending on the
supply voltage at the VCC pin. The UVLO contains a hysteresis with the voltage thresholds V
IC and V
The IC is enabled when VCC exceeds the threshold V
for disabling the IC. As soon as the mains input voltage is applied, current flows into the VCC pin.
VCCmin
and enters normal operation when no fault condition is
VCCon
detected. In this phase, VCC drops until the self-supply via the auxiliary winding takes over the supply at the VCC
pin. For a proper start-up, the self-supply via auxiliary winding must be in place before VCC falls below V
threshold.
If the voltage at the VCC pin reaches V
sink up to I
VCCclamp
. Overvoltage detection at the VCC pin is implemented via a threshold of V
VCCclamp
during start-up, restart and in the burst pause, the IC is able to
behaviour can be seen in Figure 16.
ICL8810 and ICL8820 only
To prevent an IC restart due to too low supply voltage, two mechanisms are implemented to overcome this
issue:
• In addition to the burst mode wake-up according to the control loop, a higher priority VCC wake-up
threshold may trigger a burst start if VCC drops as low as V
until VCC increases up to V
VCCburst
again.
VCCwake
. The controller continues with the burst
• In parallel, the TD pin lowers its voltage to enable an external start-up circuit to charge the VCC cap until
V
VCCburst
.
for enabling the
VCCon
. The start-up
VCCmax
VCCmin
Datasheet 23 Rev. 1.0
2021-04-01
Page 24
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
3.14 Fault reaction and flow chart
Flow chart
The Figure 21 shows the dierent states of the IC and the conditions to change the state.
UVLO
VCC < V
VCC > V
VCCon
IC power up
Power up done
Monitoring
Temp < T, Vin > Vinbi,
TD measurement done,
Soft Start
VCCmin
timer exceeded
Regular = 200ms
Vin<(Vinuvp||Vinbo) = 25ms
Internal error
Temp > T
Vin < Vinuvp
Vin < Vinbi
Any protection
Restart
timer
Fault
Start-up done
Run
Any protection
Figure 21 ICL88xx flow chart
Fault reaction
The controller handles protections as listed in Table 2.
Note: Some blanking times vary slightly with the line frequency.
Datasheet 24 Rev. 1.0
2021-04-01
Page 25
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
3 Functional description
Table 2 Fault matrix
Fault Detection Typical
blanking
time
Insuicient supply V
Insuicient supply V
VCC overvoltage VCC > V
VIN short protection V
VIN undervoltage
< V
VCC
VCCon
< V
VCC
VCCmin
VCCOVP
< V
VIN
VINshort
V
< V
VIN
BI
1 µs X - - Wait in reset
1 µs X X X Reset
1 µs - X X Auto-restart aer t
1 µs X X X Auto-restart aer t
2 ms X X X Fast auto-restart aer
protection
VIN overvoltage
V
VIN
< V
VINOV
2 ms X X X Auto-restart aer t
protection
Overcurrent protection
VCS > V
OCP1
250 ns - X X Turn o gate driver for
(OCP1)
Overcurrent protection
VCS > V
OCP2
150 ns - X X Auto-restart aer t
(OCP2)
Secondary output
overvoltage protection
Overtemperature T > T
VS overvoltage VVS > V
I
ZCD*nZCDOVP
V
OCP1
critical
VSOVOFF
>
100 µs - X X Auto-restart aer t
18 µs X X X Auto-restart aer t
20 µs - X X Turn o gate driver and
State Reaction
MonitorSo-
Run
start
t
restart,fast
the on-going switching
cycle
restart if VVS < V
restart
restart
restart
restart
restart
restart
VSOVON
3.15 Adjustable functions
Some features of the controller can be adjusted using external circuitry:
• The maximum power/on-time/operating point can be configured using the ZCD to aux winding resistance.
• The flyback output over voltage protection can be configured using the CS series resistance to the shunt
resistor.
• Brown-in and out Protection and the related input over voltage protection
• Primary side over current protection
Please refer to the Design Guide for details.
Datasheet 25 Rev. 1.0
2021-04-01
Page 26
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
4 Electrical characteristics and parameters
4 Electrical characteristics and parameters
All signals are measured with respect to the ground pin, GND. The voltage levels are valid provided that other
ratings are not violated.
4.1 Absolute maximum ratings
Note: Absolute maximum ratings are defined as ratings, which if exceeded may lead to destruction of the
integrated circuit. Exposure to absolute maximum rating conditions for extended periods may aect
device reliability. Maximum ratings are absolute ratings; exceeding only one of these values may
cause irreversible damage to the integrated circuit. These values are not tested during production
test.
Table 3 Absolute maximum ratings
Parameter Symbol Values Unit Note or test
Min. Typ. Max.
condition
VCC voltage V
Junction temperature T
Storage temperature T
Soldering temperature T
Thermal resistance junction to ambient R
Power dissipation at 50°C P
ESD capability HBM V
ESD capability CDM V
GD voltage V
CS voltage V
CS current I
ZCD voltage V
ZCD current I
VS voltage V
VIN voltage V
TD voltage V
CC
j
S
S
ThJA
D
ESD
ESD
GD
CS
CS
ZCD
ZCD
VS
VIN
TD
-0.5 – 26 V
-40 – 150 °C
-55 – 150 °C
– – 260 °C Wave soldering
according to
JESD22-A111 Rev
A.
– – 185 K/W
– – 0.5 W
– – 2 kV ESD-HBM
according to ANSI/
ESDA/JEDEC
JS-001.
– – 500 V ESD-CDM
according to ANSI/
ESDA/JEDEC
JS-002.
-0.5 – VCC +
V
0.3
-0.5 – 3.6 V
-2 – 2 mA
-1.2 – 3.6 V
-4 – 4 mA
-0.3 – 3.6 V
-0.3 – 3.6 V
-0.3 – 3.6 V
Datasheet 26 Rev. 1.0
2021-04-01
Page 27
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
4 Electrical characteristics and parameters
4.2 Operating conditions
The recommended operating conditions are shown for which the DC electrical characteristics are valid.
Table 4 Operating characteristics
Parameter Symbol Values Unit Note or test
Min. Typ. Max.
condition
Junction temperature T
Supply voltage V
External capacitance at the TD pin C
J
CC
TD
-40 – 125 °C
8 – 24 V
– – 1 nF
4.3 DC electrical characteristics
The electrical characteristics provide the spread of values applicable within the specified supply voltage and
junction temperature range. Devices are tested in production at TA = 25 °C. Values have been verified either
with simulation models or by device characterization up to 125 °C. Typical values represent the median values
related to TA = 25 °C.
All voltages refer to GND, and the assumed supply voltage is VCC = 15 V, if not otherwise specified.
4.3.1 Power supply
Table 5 Power supply characteristics
Parameter Symbol Values Unit Note or test
condition
excluding gate
currents.
VCC turn-on threshold V
Start-up current I
Supply current I
VCCon
VCCstart
CC
Min. Typ. Max.
12.0 12.5 13.1 V
– 30 – μA
– 2.0 – mA IC self-supply
Supply current during burst pause I
Supply current in protection mode I
VCC undervoltage threshold V
VCC wake-up threshold V
VCC burst threshold V
Dierence between V
VCCwake
and V
Vccburst
VCC overvoltage threshold V
VCC clamp voltage aer VCC overvoltage V
VCC clamp current I
Datasheet 27 Rev. 1.0
CCburst
CCrestart
VCCmin
VCCwake
VCCburst
V
delta
VCCmax
VCCclamp
VCCclamp
– 220 – μA
– 40 – μA
6.0 6.6 7.6 V
6.6 7.6 8.8 V
7.1 8.1 9.1 V
500 – – mV
23.8 25 26.4 V
– 24.2 – V
– 2.5 – mA
2021-04-01
Page 28
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
4 Electrical characteristics and parameters
4.3.2 Zero crossing detection
Table 6 Electrical characteristics
Parameter Symbol Values Unit Note or test
Min. Typ. Max.
condition
Zero crossing threshold (falling edge) V
Zero crossing threshold (rising edge) V
Clamping current I
ZCDDown
ZCDUp
ZCDclp
10 45 – mV
– 55 90 mV
– – 1.2 mA Applies to positive
and negative
clamping.
Clamping of positive voltages V
Clamping of negative voltages V
ZCD ringing suppression time t
ZCD to CS current ratio for flyback
secondary side OVP
ZCD to CS current ratio for flyback
secondary side OVP
ZCDpclp
ZCDnclp
Ringsup
n
ZCDOVP
n
ZCDOVP
400 550 700 mV I
-600 -500 -400 mV I
350 700 1100 ns
0.455 0.484 0.513 I
0.450 0.484 0.518 I
ZCDSink
ZCDSource
CSsource
1.2 mA
CSsource
0.8 mA
= 1 mA
4.3.3 Voltage sense
Table 7 Electrical characteristics
Parameter Symbol Values UnitNote or test
Min. Typ. Max.
condition
= - 1 mA
/ I
ZCDclp
/ I
ZCDclp
at
at
VS bias current - I
Voltage source for optocoupler/feedback
V
supply
VS current threshold for start up - I
Open pin turn-o V
ADC lower current limit - I
ADC upper current limit - I
VSBias
VS
VSsink
VSOVOFFFB
VSADCmin
VSADCmax
0.5 1.0 1.5 µA VVS = V
ref
1.56 1.6 1.63 V Internal series
resistance of 500 Ω.
102 130 154 µA 12 kΩ from VS to GND
recommended.
2.64 2.7 2.76 V
166 210 260 µA For maximum ontime
during operation
500 610 720 µA For minimum ontime
in burst mode
Datasheet 28 Rev. 1.0
2021-04-01
Page 29
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
4 Electrical characteristics and parameters
4.3.4 Input voltage detection
Table 8 Electrical characteristics
Parameter Symbol Values Unit Note or test
Min. Typ. Max.
condition
Brownout voltage level V
BO
0.4 0.42 0.44 V DC threshold aer
internal
averaging.
Brown-in voltage level V
BI
0.61 0.63 0.65 V DC threshold aer
internal
averaging.
VIN pin short to GND threshold V
VIN over voltage threshold V
VINshort
VINOV
150 200 250 mV
1.9 2.0 2.1 V
4.3.5 THD configuration
Table 9 Electrical characteristics
Parameter Symbol Values Unit Note or test
condition
3.3 V.
resistor from TD
pin to GND.
Internal pull up resistor for THD tuning R
Minimum threshold for THD tuning V
Maximum threshold for THD tuning V
Resistor range for THD correction function R
TD,flyback
TD,low
TD,high
TD
Min. Typ. Max.
32 40 48 kΩ Internal voltage
0.94 1.02 1.1 V
2.18 2.28 2.4 V
27 – 68 kΩ Only valid for
4.3.6 Current sense
Table 10 Electrical characteristics
Parameter Symbol Values Unit Note or test
Min. Typ. Max.
OCP1 turn-o threshold V
OCP1 leading-edge blanking time t
Over current blanking and propagation
OCP1
LEB
t
CSO
570 610 650 mV
240 295 350 ns Pulse width when
– 290 – ns Propagation delay
delay
OCP2 turn-o threshold V
OCP2 trigger time t
CS pull-up current -I
Datasheet 29 Rev. 1.0
OCP2
OCP2
CSPU
1140 1210 1260 mV
– 150 – ns Pulse width when
0.5 1 1.5 µA
condition
VCS > V
OCP1
; no
production test.
= 50 ns; no
production test.
VCS > V
OCP2
; no
production test.
2021-04-01
Page 30
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
4 Electrical characteristics and parameters
4.3.7 PWM generation
Table 11 Electrical characteristics
Parameter Symbol Values Unit Note or test
condition
input voltage, not
tested in
production.
= 1.2
ZCDclp
mA, not tested in
production.
Initial on-time
1)
Maximal on-time
Min. Typ. Max.
t
ON_initial
2)
t
ON_max
1.75 6.0 10.64 µs Depending on
16 20 - µs For I
Minimum on-time t
Repetition time
1)
O-time t
ON_min
t
Rep
O
– 200 – ns Depends on
MOSFET gate
capacitance.
Pulses are
minimum 800 ns,
but can be
shortened due to
pre-charging, not
tested in
production.
47 52 60 µs V
= 0 V, not
ZCD
tested in
production.
42 47 52.5 µs Not tested in
production.
1
When missing zero crossing signal.
2
At the maximum of the AC line input voltage in RUN mode.
Datasheet 30 Rev. 1.0
2021-04-01
Page 31
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
4 Electrical characteristics and parameters
4.3.8 Gate driver
Table 12 Electrical characteristics
Parameter Symbol Values Unit Note or test
Min. Typ. Max.
condition
GD source current -I
source
125 – – mA The parameter is
not subject to
production testing
– verified by
design/
characterization.
GD sink current I
sink
250 – – mA The parameter is
not subject to
production testing
– verified by
design/
characterization.
GD voltage V
Reduced GD voltage during start-up and
GD
V
GDred
10.4 11.0 11.6 V VCC > 11.5 V
6.5 7.0 7.5 V VCC > 7.7 V
burst mode
4.3.9 Clock oscillators
Table 13 Electrical characteristics
Parameter Symbol Values Unit Note or test
Min. Typ. Max.
condition
Restart time t
restart
– 200 – ms Not tested in
production.
Fast restart time t
restart,fast
– 25 – ms Only for VIN under
voltage event; not
tested in
production.
4.3.10 Temperature sensor
Table 14 Electrical characteristics
Parameter Symbol Values Unit Note or test
condition
Relative accuracy of the temperature
sensor
End temperature for power limitation and
shutdown temperature
Min. Typ. Max.
Δ
T -6 – +6 °C
T – 130 – °C
Datasheet 31 Rev. 1.0
2021-04-01
Page 32
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
5 Package dimensions
5 Package dimensions
The package dimensions of PG-DSO-8 are provided.
Figure 22 Package dimensions for PG-DSO-8
Datasheet 32 Rev. 1.0
2021-04-01
Page 33
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
5 Package dimensions
Figure 23 Tape and reel for PG-DSO-8
Note: You can find all of our packages, packing types and other package information on our Infineon
Internet page “Products”: http://www.infineon.com/products.
Datasheet 33 Rev. 1.0
2021-04-01
Page 34
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
6 Glossary
6 Glossary
AC Alternating current
ADC Analog-to-digital converter
BM Burst mode
CV Constant voltage
CCM Continuous conduction mode
DC Direct current
DCM Discontinuous conduction mode
EMI Electromagnetic interference
ESD Electrostatic discharge
LED Light emitting diode
OCP Overcurrent protection
OTP Overtemperature protection
OVP Overvoltage protection
PF Power factor
PFC Power factor correction
PSR Primary side regulated
QR Quasi-resonant
QRM Quasi-resonant mode
SSR Secondary side regulation
THD Total harmonic distortion
UVLO Under voltage lockout unit
Datasheet 34 Rev. 1.0
2021-04-01
Page 35
ICL88xx
Datasheet for ICL8800, ICL8810 and ICL8820
7 Revision history
7 Revision history
Revision Date Changes
1.0 2021-03-17 Initial release
Datasheet 35 Rev. 1.0
2021-04-01
Page 36
Trademarks
All referenced product or service names and trademarks are the property of their respective owners.
Edition 2021-04-01
Published by
Infineon Technologies AG
81726 Munich, Germany
©
2021 Infineon Technologies AG
All Rights Reserved.
Do you have a question about any
aspect of this document?
Email: erratum@infineon.com
Document reference
IFX-ksh1514880840764
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With respect to any examples, hints or any typical
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