Datasheet L6562AT Datasheet (ST)

Features

■ Guaranteed for extreme temperature range

(outdoor)

■ Proprietary multiplier design for minimum THD

■ Very accurate adjustable output overvoltage

protection

■ Ultra-low (30 μA) start-up current

■ Low (2.5 mA) quiescent current

■ Digital leading-edge blanking on current sense

■ Disable function on E/A input

■ 1% (@ T

■ -600/+800 mA totem pole gate driver with

active pull-down during UVLO and voltage
clamp

Figure 1. Block diagram

= 25 °C) internal reference voltage

J

L6562AT

Transition-mode PFC controller

SO-8DIP-8

■ DIP-8/SO-8 packages

Applications

PFC pre-regulators for:

■ Street lighting

■ IEC61000-3-2 compliant SMPS (Flat TV,

monitors, desktop PC, games)

■ Electronic ballast

Table 1. Device summary

Order codes Package Packaging

L6562ATN DIP-8 Tube

L6562ATD

L6562ATDTR Tape and reel

March 2009 Rev 2 1/25

SO-8

Tu be

www.st.com

25

Contents L6562AT

Contents

1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

6 Typical electrical characteristic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

7 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.1 Overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7.2 Disable function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.3 THD optimizer circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.4 Operating with no auxiliary winding on the boost inductor . . . . . . . . . . . . 15

7.5 Comparison between the L6562AT and the L6562 . . . . . . . . . . . . . . . . . 16

8 Application examples and ideas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

9 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2/25

Description L6562AT

1 Description

The L6562AT is a current-mode PFC controller operating in transition mode (TM). Coming
with the same pin-out as its predecessors L6561 and L6562, it offers improved performance.

The highly linear multiplier includes a special circuit, able to reduce AC input current
distortion, that allows wide-range-mains operation with an extremely low THD, even over a
large load range.

The output voltage is controlled by means of a voltage-mode error amplifier and an accurate
(1% @T

The device features extremely low consumption (60 µA max. before start-up and < 5.5 mA
operating) and includes a disable function suitable for IC remote ON/OFF, which makes it
easier to comply with energy saving requirements (Blue Angel, EnergyStar, Energy2000,
etc.).

An effective two-step OVP enables to safely handle over-voltages either occurring at start­up or resulting from load disconnection.

The totem-pole output stage, capable of 600 mA source and 800 mA sink current, is suitable
to drive high current MOSFETs or IGBTs. This, combined with the other features and the
possibility to operate with the proprietary fixed-off-time control, makes the device an
excellent low-cost solution for EN61000-3-2 compliant SMPS in excess of 350 W.

= 25 °C) internal voltage reference.

J

3/25

Pin settings L6562AT

2 Pin settings

2.1 Pin connection

Figure 2. Pin connection (top view)

2.2 Pin description

Table 2. Pin description

Pin N° Name Description

Inverting input of the error amplifier. The information on the output voltage of

1INV

2COMP

3MULT

4CS

5ZCD

the PFC pre-regulator is fed into this pin through a resistor divider. The pin
doubles as an ON/OFF control input.

Output of the error amplifier. A compensation network is placed between this
pin and INV to achieve stability of the voltage control loop and ensure high
power factor and low THD.

Main input to the multiplier. This pin is connected to the rectified mains
voltage via a resistor divider and provides the sinusoidal reference to the
current loop.

Input to the PWM comparator. The current flowing in the MOSFET is sensed
through a resistor, the resulting voltage is applied to this pin and compared
with an internal sinusoidal-shaped reference, generated by the multiplier, to
determine MOSFET’s turn-off. The pin is equipped with 200 ns leading-edge
blanking for improved noise immunity.

Boost inductor’s demagnetization sensing input for transition-mode
operation. A negative-going edge triggers MOSFET’s turn-on.

INV

COMP

MULT

CS

1

2

3

4

Vcc

8

GD

7

GND

6

ZCD

5

6 GND Ground. Current return for both the signal part of the IC and the gate driver.

Gate driver output. The totem pole output stage is able to drive power

7GD

8Vcc

4/25

MOSFET’s and IGBT’s with a peak current of 600 mA source and 800 mA
sink. The high-level voltage of this pin is clamped at about 12 V to avoid
excessive gate voltages in case the pin is supplied with a high Vcc.

Supply voltage of both the signal part of the IC and the gate driver. The
supply voltage upper limit is extended to 22 V min. to provide more
headroom for supply voltage changes.

Maximum ratings L6562AT

3 Maximum ratings

Table 3. Absolute maximum ratings

Symbol Pin Parameter Value Unit

V

CC

I

GD

--- 1 to 4 Analog inputs and outputs -0.3 to 8 V

I

ZCD

8 IC supply voltage (ICC ≤ 20 mA) Self-limited V

7 Output totem pole peak current Self-limited A

5 Zero current detector max. current ±10 mA

4 Thermal data

Table 4. Thermal data

Symbol Parameter

R

P

T

thJA

TOT

T

STG

Max. thermal resistance, junction-to­ambient

Power dissipation @TA = 50 °C 0.65 1 W

Junction temperature operating range -40 to 150 °C

J

Storage temperature -55 to 150 °C

Val ue

Unit

SO8 DIP8

150 100 °C/W

5/25

Electrical characteristics L6562AT

5 Electrical characteristics

-40 °C < TJ < +125 °C, VCC = 12 V, CO = 1 nF; unless otherwise specified

Table 5. Electrical characteristics

Symbol Parameter Test condition Min Typ Max Unit

Supply voltage

V

Vcc

Vcc

CC

Operating range After turn-on 10.5 22.5 V

Turn-on threshold

On

Turn-off threshold

Off

(1)

(1)

11.7 12.5 13.3 V

9.5 10 10.5 V

Hys Hysteresis 2.2 2.8 V

V

Zener voltage ICC = 20 mA 22.5 25 28 V

Z

Supply current

I

start-up

I

I

CC

I

Start-up current Before turn-on, VCC = 11 V 30 60 µA

Quiescent current After turn-on 2.5 3.9 mA

q

Operating supply current @ 70 kHz 3.5 5.5 mA

Quiescent current

q

During OVP (either static or dynamic)

≤ 150 mV

or V

INV

1.7 2.2 mA

Multiplier input

I

MULT

V

MULT

VcsΔ

---------------------

V

Δ

MULT

K Gain

Input bias current V

= 0 to 4 V -1 µA

MULT

Linear operation range 0 to 3 V

= 0 to 1 V,

V

Output max. slope

(2)

MULT

V

COMP

V

MULT

= 1 V, V

= Upper clamp

COMP

11.1 V/V

= 4 V, 0.32 0.38 0.47 V

Error amplifier

= 25 °C 2.475 2.5 2.525

T

V

I

INV

INV

Voltage feedback input
threshold

Line regulation V

Input bias current V

J

10.5 V < V

= 10.5 V to 22.5 V 2 5 mV

CC

= 0 to 3 V -1 µA

INV

< 22.5 V

CC

(1)

2.44 2.545

Gv Voltage gain Open loop 60 80 dB

GB Gain-bandwidth product 1 MHz

I

COMP

V

COMP

V

INVdis

V

INVen

Source current V

Sink current V

Upper clamp voltage I

Lower clamp voltage I

Disable threshold 150 200 250 mV

Restart threshold 380 450 520 mV

COMP

COMP

SOURCE

= 0.5 mA

SINK

= 4 V, V

= 4 V, V

= 2.4 V -2 -3.5 -5 mA

INV

= 2.6 V 2.5 4.5 mA

INV

= 0.5 mA 5.1 5.7 6 V

(1)

2.12.252.4 V

6/25

V

Electrical characteristics L6562AT

(

−

⋅

Table 5. Electrical characteristics (continued)

Symbol Parameter Test condition Min Typ Max Unit

Output overvoltage

I

OVP

Dynamic OVP triggering
current

Hys Hysteresis

Static OVP threshold

Current sense comparator

td

Vcs

I

t

V

LEB

CS

(H-L)

CS

Input bias current VCS = 0 -1 µA

Leading edge blanking 100 200 300 ns

Delay to output 175 ns

Current sense clamp V

Current sense offset

offset

Zero current detector

V

V

V

V

ZCDH

ZCDL

ZCDA

ZCDT

Upper clamp voltage I

Lower clamp voltage I

Arming voltage
(positive-going edge)

Triggering voltage
(negative-going edge)

19.5 27 30.5 µA

(3)

(1)

= Upper clamp, Vmult = 1.5 V 1.0 1.08 1.16 V

COMP

V

= 0 25

MULT

= 2.5 V 5

V

MULT

= 2.5 mA 5.0 5.7 6.5 V

ZCD

= - 2.5 mA -0.5 0 0.5 V

ZCD

(3)

(3)

2.12.252.4 V

20 µA

1.4 V

0.7 V

mV

I

ZCDb

I

ZCDsrc

I

ZCDsnk

Input bias current V

= 1 to 4.5 V 2 µA

ZCD

Source current capability -1.5 mA

Sink current capability 1.5 mA

Starter

t

START

Start timer period 75 190 300 µs

Gate driver

V

OL

V

OH

I

srcpk

I

snkpk

t

t

V

Oclamp

1. All the parameters are in tracking

2. The multiplier output is given by:

3. Parameters guaranteed by design, functionality tested in production.

Output low voltage I

Output high voltage I

= 100 mA 0.6 1.2 V

sink

= 5 mA 9.5 10.3 V

source

Peak source current -0.6 A

Peak sink current 0.8 A

Voltage fall time 30 70 ns

f

Voltage rise time 60 130 ns

r

Output clamp voltage I

UVLO saturation Vcc = 0 to V

= ⋅

= 5 mA; Vcc = 20 V 10 12 15 V

source

, I

CCon

sink

COMPMULTcs

= 2 mA 1.1 V

)

5.2VVK V

7/25

Typical electrical characteristic L6562AT

pj

pj

6 Typical electrical characteristic

Figure 3. Supply current vs supply

10.00

1.00

0.10

Icc (mA)

0.01

0.00

0.00 5. 00 10. 00 15.00 20.00 25.00

Figure 5. IC consumption vs T

10

1

voltage

Vcc (V)

Co = 1 nF
f = 70 kHz
Tj = 25°C

J

Ope rat ing

Quiescent

Disabled or during OVP

Figure 4. Start-up and UVLO vs TJ

13

Vcc-ON

12

11

(V)

10

Vcc-OFF

9

-50 0 50 100 150

Figure 6. Vcc Zener voltage vs T

28

27

26

Tj (°C)

J

Icc (mA)

0.01

0.1

-50 0 50 100 150

Tj (°C)

Vcc = 12 V
Co= 1 nF
f = 70 kHz

Before start-up

8/25

25

VccZ (V)

24

23

22

-50 0 50 100 150

Tj (°C)

Typical electrical characteristic L6562AT

j

Figure 7. Feedback reference vs T

2.6

Vcc = 12V

2.55

2.5

VREF (V)

2.45

2.4

-50 0 50 100 150

Figure 9. E/A output clamp levels vs TJFigure 10. Delay-to-output vs T

6

5

4

3

V COMP pin2 (V)

2

Tj (°C)

Uppe r cl am p

Vcc = 12V

Lower clam p

Figure 8. OVP current vs T

J

35

34

33

32

31

30

29

Iovp (uA)

28

27

26

25

24

23

-50 0 50 100 150

300

200

tD (H-L) (ns)

100

J

Tj (°C)

Vcc = 12V

J

Vcc = 12V

1

-50 0 50 100 150

Tj (°C)

9/25

0

-50 0 50 100 150
Tj (°C)

Typical electrical characteristic L6562AT

p

V

pj

pj

Figure 11. Multiplier characteristic Figure 12. Vcs clamp vs T

1.2

Upper Volt. Clamp

1.1

1.0

0.9

0.8

0.7

0.6

0.5

Vcs (pi n4) (V)

0.4

0.3

0.2

0.1

0.0

-0.1

Figure 13. ZCD clamp levels vs T

7

6

5

4

3

Vzcd (V)

2

5.75 V

5 V

4.5V

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3

VMULT (pin3) (V)

V COMP (pin2) (V

4 V

J

Uppe r cl am p

Vcc = 12V

IZCD = ±2. 5 mA

3.5V

3 V

2.5

1.3

)

1.2

Vcsx (V)

1.1

1

-50 0 50 100 150

Tj (°C)

Figure 14. Start-up timer vs T

200

190

180

Tstart (us)

170

J

Vcc = 12V

VCOMP = Upper clamp

J

Vcc = 12V

1

0

-1

-50 0 50 100 150
Tj (°C)

Lower clam p

160

150

-50 0 50 100 150
Tj (°C)

10/25

Typical electrical characteristic L6562AT

Figure 15. Gate-driver output low

5.00

4.00

3.00

Vpin7 (V)

2.00

1.00

0.00
0 200 400 600 800 1000

Figure 17. Gate-drive clamp vs T

13.5

13.25

13

Vpin 7 clamp (V)

12.75

saturation

I GD (mA)

Tj = 25 °C

Vcc = 12V

SINK

J

Vcc = 20V

Figure 16. Gate-drive output high

saturation

12.00

11.00

10.00

9.00

Vpin7 (V)

8.00

7.00

6.00

0 200 400 600

I GD (mA)

Figure 18. Output gate drive low

saturation vs T

1.1

1

Vcc = 11V

0.9

Vcc = 0V

0.8

Vpin7 (V)

0.7

0.6

during UVLO

J

Isink = 2 m A

Tj = 25 °C

Vcc = 12V

SOURCE

12.5

-50 0 50 100 150
Tj (°C)

11/25

0.5

-50 0 50 100 150
Tj (°C)

Application information L6562AT

7 Application information

7.1 Overvoltage protection

Under steady-state conditions, the voltage control loop keeps the output voltage Vo of a
PFC pre-regulator close to its nominal value, set by the resistors R1 and R2 of the output
divider. Neglecting ripple components, the current through R1, I
I

. Considering that the non-inverting input of the error amplifier is internally referenced at

R2

2.5 V, also the voltage at pin INV will be 2.5 V, then:

Equation 1

V

I

R2IR1

2.5

------- -

R2

O

--------------------- -===

2.5–

R1

If the output voltage experiences an abrupt change ΔVo > 0 due to a load drop, the voltage
at pin INV will be kept at 2.5 V by the local feedback of the error amplifier, a network
connected between pins INV and COMP that introduces a long time constant to achieve
high PF (this is why ΔVo can be large). As a result, the current through R2 will remain equal
to 2.5/R2 but that through R1 will become:

, equals that through R2,

R1

Equation 2

VO2.5– VOΔ+

I'

--------------------------------------- -=

R1

R1

The difference current ΔIR1=I'R1-IR2=I'R1-IR1= ΔVo/R1 will flow through the compensation
network and enter the error amplifier output (pin COMP). This current is monitored inside
the device and if it reaches about 24 µA the output voltage of the multiplier is forced to
decrease, thus smoothly reducing the energy delivered to the output. As the current
exceeds 27 µA, the OVP is triggered (Dynamic OVP): the gate-drive is forced low to switch
off the external power transistor and the IC put in an idle state. This condition is maintained
until the current falls below approximately 7 µA, which re-enables the internal starter and
allows switching to restart. The output ΔVo that is able to trigger the Dynamic OVP function
is then:

Equation 3

Δ

VO = R1 · 20 · 10

- 6

An important advantage of this technique is that the OV level can be set independently of
the regulated output voltage: the latter depends on the ratio of R1 to R2, the former on the
individual value of R1. Another advantage is the precision: the tolerance of the detection
current is 13%, i.e. 13% tolerance on ΔVo. Since ΔVo << Vo, the tolerance on the absolute
value will be proportionally reduced.

Example: Vo = 400 V, ΔVo = 40 V. Then: R1 = 40 V/27 µA
R2 = 1.5 MΩ ·2.5/(400-2.5) = 9.43 kΩ. The tolerance on the OVP level due to the L6562AT
will be 40·0.13 = 5.3 V, that is ± 1.2 %.

12/25

≈ 1.5 MΩ;

Application information L6562AT

When the load of a PFC pre-regulator is very low, the output voltage tends to stay steadily
above the nominal value, which cannot be handled by the Dynamic OVP. If this occurs,
however, the error amplifier output will saturate low; hence, when this is detected the
external power transistor is switched off and the IC put in an idle state (static OVP). Normal
operation is resumed as the error amplifier goes back into its linear region. As a result, the
device will work in burst-mode, with a repetition rate that can be very low.

When either OVP is activated the quiescent consumption of the IC is reduced to minimize
the discharge of the Vcc capacitor and increase the hold-up capability of the IC supply
system.

7.2 Disable function

The INV pin doubles its function as a not-latched IC disable: a voltage below 0.2 V shuts
down the IC and reduces its consumption at a lower value. To restart the IC, the voltage on
the pin must exceed 0.45 V. The main usage of this function is a remote ON/OFF control
input that can be driven by a PWM controller for power management purposes. However it
also offers a certain degree of additional safety since it will cause the IC to shutdown in case
the lower resistor of the output divider is shorted to ground or if the upper resistor is missing
or fails open.

7.3 THD optimizer circuit

The device is equipped with a special circuit that reduces the conduction dead-angle
occurring to the AC input current near the zero-crossings of the line voltage (crossover
distortion). In this way the THD (total harmonic distortion) of the current is considerably
reduced.

A major cause of this distortion is the inability of the system to transfer energy effectively
when the instantaneous line voltage is very low. This effect is magnified by the high­frequency filter capacitor placed after the bridge rectifier, which retains some residual
voltage that causes the diodes of the bridge rectifier to be reverse-biased and the input
current flow to temporarily stop.

13/25

Application information L6562AT

Figure 19. THD optimization: standard TM PFC controller (left side) and L6562AT

(right side)

Input current Input current

Rectified mains voltage Rectified mains voltage

Imains

Input current

MOSFET's drain voltage

Vdrain

Imains

Input current

MOSFET's drain voltage

Vdrain

To overcome this issue the circuit embedded in the device forces the PFC pre-regulator to
process more energy near the line voltage zero-crossings as compared to that commanded
by the control loop. This will result in both minimizing the time interval where energy transfer
is lacking and fully discharging the high-frequency filter capacitor after the bridge. The effect
of the circuit is shown in figure 2, where the key waveforms of a standard TM PFC controller
are compared to those of the L6562AT.

Essentially, the circuit artificially increases the ON-time of the power switch with a positive
offset added to the output of the multiplier in the proximity of the line voltage zero-crossings.
This offset is reduced as the instantaneous line voltage increases, so that it becomes
negligible as the line voltage moves toward the top of the sinusoid.

To maximally benefit from the THD optimizer circuit, the high-frequency filter capacitor after
the bridge rectifier should be minimized, compatibly with EMI filtering needs. A large
capacitance, in fact, introduces a conduction dead-angle of the AC input current in itself ­even with an ideal energy transfer by the PFC pre-regulator - thus making the action of the
optimizer circuit little effective.

14/25

Application information L6562AT

R

7.4 Operating with no auxiliary winding on the boost inductor

To generate the synchronization signal on the ZCD pin, the typical approach requires the
connection between the pin and an auxiliary winding of the boost inductor through a limiting
resistor. When the device is supplied by the cascaded DC-DC converter, it is necessary to
introduce a supplementary winding to the PFC choke just to operate the ZCD pin.

Another solution could be implemented by simply connecting the ZCD pin to the drain of the
power MOSFET through an R-C network as shown in figure 3: in this way the high­frequency edges experienced by the drain will be transferred to the ZCD pin, hence arming
and triggering the ZCD comparator.

Also in this case the resistance value must be properly chosen to limit the current
sourced/sunk by the ZCD pin. In typical applications with output voltages around 400 V,
recommended values for these components are 22 pF (or 33 pF) for C
R

. With these values proper operation is guaranteed even with few volts difference

ZCD

between the regulated output voltage and the peak input voltage

Figure 20. ZCD pin synchronization without auxiliary winding

ZCD

C

ZCD

and 330 kΩ for

ZCD

ZCD

5

L6562AT

15/25

Application information L6562AT

7.5 Comparison between the L6562AT and the L6562

The L6562AT is not a direct drop-in replacement of the L6562, even if both have the same
pin-out. One function (Disable) has been relocated.
Table 2 compares the two devices, i.e. those parameters that may result in different values
of the external components. The parameters that have the most significant impact on the
design, i.e. that definitely require external component changes when converting an L6562­based design to the L6562AT, are highlighted in bold.

Table 6. L6562AT vs L6562

Parameter L6562 L6562AT

IC turn-on and turn-off thresholds (typ.) 12/9.5 V 12.5/10 V

Turn-off threshold spread (max.) ±0.8 V ±0.5 V

IC consumption before start-up (max.) 70 uA 60 uA

Multiplier gain (typ.) 0.6 0.38

Current sense reference clamp (typ.) 1.7 V 1.08 V

Current sense propagation delay (delay-to-output) (typ.) 200 ns 175 ns

Dynamic OVP triggering current (typ.) 40 µA 27 µA

ZCD arm/trigger/clamp thresholds (typ.) 2.1/1.4/0.7 V 1.4/0.7/0 V

Enable threshold (typ.) 0.3 V

Gate-driver internal drop (max.) 2.6 V 2.2 V

Leading-edge blanking on current sense No Yes

Reference voltage accuracy (overall) 2.4% 1.8%

1. Function located on pin 5 (ZCD)

2. Function located on pin 1 (INV)

(1)

0.45 V

(2)

The lower value (-36%) for the clamp level of the current sense reference voltage allows the
use of a lower sense resistor for the same peak current, with a proportional reduction of the
associated power dissipation. Essentially, the advantage is the reduction of the power
dissipated in a single point (hotspot), which is a considerable benefit in applications where
heat removal is critical, e.g. in adapters enclosed in a sealed plastic case. The lower value
for the dynamic OVP triggering current allows the use of a higher resistance value (+48%)
for the upper resistor of the divider sensing the output voltage of the PFC stage (keeping the
same overvoltage level) with no significant increase of noise sensitivity. This reduction goes
in favor of standby consumption in applications required to comply with energy saving
regulations.

16/25

Application examples and ideas L6562AT

8 Application examples and ideas

Figure 21. Demonstration board wide-range mains: electrical schematic

Vo=400V

Vo=400V

Po=80W

Po=80W

R11

R11

Ω

Ω

1M

1M

R12

R12
1M

1M

Ω

Ω

C6

C6

47 µF

47 µF
450V

450V

R13B

R13B
82 k

82 k

Ω

Ω

Ω

Ω

F1

F1

4A/250V

4A/250V

Vac

Vac
88V

88V

to

to

264V

264V

R4

R5

R4

R5

Ω

Ω

270 k

270 k

270 k

270 k

R1

R1

1 M

1 M

Ω

Ω

C1

P1

P1

+

+

W08

W08

-

-

Boost Inductor Spec (ITACOIL E2543/E)

Boost Inductor Spec (ITACOIL E2543/E)

C1

0.22 µF

0.22 µF
630V

630V

R2

R2

1 M

1 M

Ω

Ω

C2

C2

10nF

10nF

R3

R3

15 k

15 k

Ω

Ω

E25x13x7 core, N67 ferrite

E25x13x7 core, N67 ferrite

1.5 mm gap for 0. 7 mH primary induct ance

1.5 mm gap for 0. 7 mH primary induct ance
Primary: 102 turns 20x0.1 mm

Primary: 102 turns 20x0.1 mm
Secondary: 10 turns 0.1 mm

Secondary: 10 turns 0.1 mm

C29

C29

22 µF

22 µF

25V

25V

Ω

Ω

D8

D8

1N4148

1N4148

D2

D2

1N5248B

1N5248B

C5

C5

10 nF

10 nF

VCC

VCC

MULT

MULT

100 nF

100 nF

R14

R14

100

100

Ω

Ω

R6

R6

47 k

47 k

Ω

Ω

ZCD COMP INV

ZCD COMP INV

8

8

3

3

L6562A

GND

GND

C4

C4

T1

T1

C3 - 2200 nF

C3 - 2200 nF

5

21

5

21

L6562A

L6562A

6

6

C23

C23
150 nF

150 nF

CS

CS

R50 - 22 kΩ

R50 - 22 kΩ

GD

GD

7

7

4

4

R15

R15

SHORTED

SHORTED

R8

R8
47k

47k

D1

D1

NTC

NTC

STTH1L06

STTH1L06

2.5

2.5

Ω

Ω

R7

R7
33

33

Ω

Ω

Ω

Ω

R9

R9

0.68 Ω

0.68 Ω

0.25W

0.25W

STP8NM50FP

STP8NM50FP

R10

R10

0.68 Ω

0.68 Ω

0.25W

0.25W

Q1

Q1

R13

R13
15 k

15 k

17/25

Application examples and ideas L6562AT

Figure 22. L6562A 80W TM PFC evaluation

board: compliance to EN61000-3-2

0. 1

0.0 1

0.001

Harmonic current (A)

0. 0001

Vin = 230 Vac - 50 Hz, Pout = 80 W
THD = 10.48%, PF = 0.973

standard

Mea sur ements @ 230V ac Ful l load EN61000-3 -2 cl ass D li mit s

1

1 3 5 7 9 1113151719212325272931333537 39

Harmonic Order (n)

Figure 24. L6562A 80W TM PFC evaluation

board: input current waveform
@230 V-50 Hz – 80W load

Figure 23. L6562A 80W TM PFC evaluation

board: compliance to JEIDA-MITI
standard

Measu rem ent s @ 100Vac Full lo ad JEI DA - MITI c l ass D l im i t s

1

0. 1

0.0 1

0.001

Harm onic current (A)

0. 0001
1 3 5 7 9 1113151719212325272931333537 39

Harmonic Order (n)

Vin = 100 Vac - 50 Hz, Pout = 80 W
THD = 3.18%, PF = 0.997

Figure 25. L6562A 80W TM PFC evaluation

board: input current waveform
@100 V-50 Hz – 80 W load

18/25

Application examples and ideas L6562AT

)

Figure 26. L6562A 80W TM PFC evaluation

1.00

0.95

0.90

PF

0.85

0.80

80 100 120 140 160 180 200 220 240 260

board: power factor vs Vin

Pout = 80W

Vin (Vac)

Figure 28. L6562A 80W TM PFC evaluation

board: efficiency vs Vin

100

95

90

85

EFFICIENCY ( %)

80

75

80 100 120 140 160 180 200 220 240 260

Pout = 80W

Vin (Vac)

Figure 27. L6562A 80W TM PFC evaluation

board: THD vs Vin

12

10

8

6

THD (%

4

2

0

80 10 0 12 0 140 160 180 200 220 240 260

Vin (Vac)

Pout = 80W

Figure 29. L6562A 80W TM PFC evaluation

board: static Vout regulation vs
Vin

404

403.5

403

402.5

402

Vout (Vdc)

401.5

401

400.5

400

80 100 120 140 160 180 200 220 240 260

Pout = 80W

Vin (V ac)

19/25

Application examples and ideas L6562AT

+

Figure 30. Demonstration board EVL6562A-400W, wide-range mains, FOT

12345

+400 Vdc

C7

330uF-450V

R2

NTC 2R5-S237

C6

470nF-630V

D3

STTH8R06

D1

1N5406

D7

1-25- 6

118

L4

PQ40-500uH

C10

33N

R5

47R

R3

180K

R4

D5

D4

LL4148

180K

LL4148

R36

3R9

BZX85-C15

Q2

STP12NM50FP

Q1

STP12NM50FP

D8

LL4148

R17

6R8

R18

6R8

R35

3R9

R23

0R68W

R22

0R39-1W

R21

0R39-1W

R20

0R39-1W

R19

1K0

C20

330pF

C5

470nF-630V

L3

DM-51uH-6A

C4

470nF-630V

C12

+

-

D2

D15XB6 0

~

~

C3

680nF-X2

L2

RES

JP101

JUMPER

1 2

C2

L1

CM-1. 5mH- 5A

C1

R1

F1

8A/250V

JP102

JUMPER

1 2

470nF-X2

470nF-X2

1M5

R10

+400Vdc

47uF/50V

C11

470nF/50V

R12

R11

750k

9.1k

680k

220nF

R14

39k

C13

C14

3.3uF

8

VCCGDGND

INV

123

COMP

D6

LL4148

R15

820

R16

C15

100pF

657

15K

C16

220pF

Q3

R31

1K5

BC857C

ZCD

L6562A

MULT

CS

4

C21

10nF

R34

10k

R33

620k

R32

620k

1

2

J1

90 - 265Vac

20/25

Package mechanical data L6562AT

9 Package mechanical data

In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK

®

packages, depending on their level of environmental compliance. ECOPACK®

®

is an ST trademark.

21/25

Package mechanical data L6562AT

Table 7. DIP-8 mechanical data

mm Inch

Dim.

Min Typ Max Min Typ Max

A 3.32 0.131

a1 0.51 0.020

B 1.15 1.65 0.045 0.065

b 0.356 0.55 0.014 0.022

b1 0.204 0.304 0.008 0.012

D 10.92 0.430

E 7.95 9.75 0.313 0.384

e 2.54 0.100

e3 7.62 0.300

e4 7.62 0.300

F 6.6 0.260

I 5.08 0.200

L 3.18 3.81 0.125 0.150

Z 1.52 0.060

Figure 31. Package dimensions

22/25

Package mechanical data L6562AT

Table 8. SO-8 mechanical data

Dim.

Min Typ Max Min Typ Max

A 1.35 1.75 0.053 0.069

A1 0.10 0.25 0.004 0.010

A2 1.10 1.65 0.043 0.065

B 0.33 0.51 0.013 0.020

C 0.19 0.25 0.007 0.010

(1)

D

4.80 5.00 0.189 0.197

E 3.80 4.00 0.15 0.157

e 1.27 0.050

H 5.80 6.20 0.228 0.244

h 0.25 0.50 0.010 0.020

L 0.40 1.27 0.016 0.050

k 0° (min.), 8° (max.)

ddd 0.10 0.004

1. Dimensions D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs
shall not exceed 0.15mm (.006inch) in total (both side).

mm. inch

Figure 32. Package dimensions

23/25

Revision history L6562AT

10 Revision history

Table 9. Document revision history

Date Revision Changes

19-Jan-2009 1 First release

04-Mar-2009 2 Updated Table 5 on page 6

24/25

L6562AT

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