Diodes AP3105NA, AP3105NV, AP3105NL, AP3105NR User Manual

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Description
The AP3105NA/NV/NL/NR is a low startup current, current mode PWM controller with green-mode power-saving operation. The PWM switching frequency at normal operation is set with 65kHz typically and the dithering of frequency will also improve the EMI feature. When the load decreases, the frequency will reduce and when at a very low load, the IC will enter the ‘burst mode’ to minimize switching loss.
About 20kHz frequency switching is to avoid the audible noise as well as reducing the standby loss. The skip mode point can be adjusted through the external resistor connected to the current sense resistor.
The AP3105NA/NV/NL/NR features a lot of functions such as the Leading-Edge Blanking (LEB) of the current sensing, internal slope compensation and several protection functions including cycle-by­cycle current limit (OCP), VCC Over Voltage Protection (VOVP), OTP and OLP protection. The versatile latch function can be set by the customer through few components.
This IC is available in SOT-23-6 package.
Features
Very Low Start-up Current  Current Mode Control  Non-audible-noise Green-mode Control  Skip Mode Adjustable  Internal Slope Compensation  Soft Start During Startup Process  Frequency Fold Back for High Average Efficiency  Secondary Short Winding Protection with FOCP  Soft Switching for Reducing EMI  VCC Maintain Mode  Latch Function for OTP/OVP  Useful Pin Fault Protection:
SENSE Pin Floating CTRL Pin Short to Ground FB/Opto-coupler Open/Short
Comprehensive System Protection Feature:
VCC Over Voltage Protection (VOVP) Over Load Protection (OLP)
Mini Size with Packages  Pin to Pin Compatible with AP3103
Pin Assignments
K Package (SOT-23-6)
GND
FB
CTRL
Pin 1 Mark
1
2
34
Applications
Switching AC-DC Adapter/Charger
ATX/BTX Auxiliary Power  Set-top Box(STB) Power Supply  Open Frame Switching Power Supply
GATE
6
VCC
5
SENSE
COST EFFECTIVE GREEN PWM CONTROLLER
AP3105NA/NV/NL/NR
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Typical Applications Circuit
+
C2
NTC
R7
NTC
VR1
-
~
R3
~
R2
C1
F1
~
R4
R5
U1
VCC
CTRL
SENSE
AP3105NA/
NV/NL/NR
GND
GATE
R14
L2
C8
R15
R16
C9
U2
R17
R18
C3
FB
C4
C11
T1
C5R6
R19
R8
R9
R10
C10
R12R11
R13
C6
C7
AZ431
Pin Descriptions
Pin Number Pin Name Function
1 GND Signal ground. Current return for driver and control circuits
2 FB Feedback. Directly connected to the opto-coupler
Latch trigger if this pin voltage drops below a threshold or over another threshold, leave CTRL pin
3 CTRL
4 SENSE Current Sense
5 VCC Supply voltage of driver and control circuits
6 GATE Gate driver output
open if this function is not needed. Connecting a NTC thermistor to GND can achieve OTP
protection
AP3105NA/NV/NL/NR
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Functional Block Diagram
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VCC
FB
GND
15. 5V
8.6V
5
32 V
2
Soft Star t
1
UVLO
28 V
OVP
OSC with
Fr equency J itter
0.5V
1. 25V
2R
R
AP3105NA/NV/NL/NR
UVLO
PWM
VCC _OVP
Burs t
VCC _OVP
FOCP
CTRL_H CT RL_L
OLP
64ms D elay
OLP
Inter nal
Bias
Auto
Recover y
Protection
Latch -off
Protection
DFF
CLK
RB
250 ns LEB
2.5 V
CTRL_H
CT RL_L
0.5 V
13 V
QD
FOCP
OCP
Driver
1. 8V
0.95V
Line
Com pensati on
10 K
100 uA
3. 6V0.6 V
6
4
3
CTRL
GATE
SENSE
AP3105NA/NV/NL/NR
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Absolute Maximum Ratings
Symbol Parameter
(Note 1)
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Rating
Unit
VCC
IO
VFB, V
Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
, V
SENSE
θJA
PD Power Dissipation at TA < +25°C
TJ
T
STG
CTRL
Power Supply Voltage 30 V
Gate Output Current 350 mA
Input Voltage to FB, SENSE, CTRL -0.3 to 7 V
Thermal Resistance (Junction to Ambient) 250 °C/W
500 mW
Operating Junction Temperature -40 to +150 °C
Storage Temperature Range +150 °C
ESD (Human Body Model) 3000 V
ESD (Machine Model) 300 V
Recommended Operating Conditions
Symbol Parameter Min Max Unit
VCC
Supply Voltage 10 25 V
AP3105NA/NV/NL/NR
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Electrical Characteristics
Symbol Parameter Conditions Min Typ Max Unit
Supply Voltage (VCC Pin)
I
STARTUP
ICC
PWM Section/Oscillator Section
Current Sense Section (SENSE Pin)
VCS
Feedback Input Section (FB Pin)
Startup Current 2 5 20 μA
Operating Supply Current
U
VLO (on)
VCC Maintain
U
VLO (off)
VCC OVP
VCC Clamp ICC=5mA
Maximum Duty Cycle
Oscillation Frequency
Green Mode Frequency
Frequency Temperature
Stability
Frequency Voltage Stability
Frequency Dithering ±4 ±6 ±8 %
Maximum SENSE Voltage
FOCP Voltage
LEB Time of SENSE
Delay to Output (Note 2)
Soft-start Time
The Ratio of Input Voltage to Current Sense Voltage
Input Impedance
Source Current
Green Mode Threshold
Input Voltage for Zero Duty
(@T
= +25°C, V
A
= 16V, unless otherwise specified.)
CC
=0V, CL=1nF
V
FB
VFB=3V, CL=0nF
-20oC to 125oC (Note 2)
V
=12V to 30V
CC
VFB=3.6V
V
=0V
FB
0.5 0.85 1.2
0.6 1.2 2.0
14.5 15.5 16.5
9.7 10.2 10.7
7.6 8.6 9.6
27 28.5 30
31 34 –
70 75 80 %
60 65 70 kHz
20
0.9 0.95 1 V
1.65 1.8 1.95 V
150 250 350 ns
2.5 3 3.5 V/V
-0.75 -0.5 -0.25 mA
1.3 1.55 1.8 V
30 kHz
5 %
– 100 – ns
3 5 8 ms
7 10 13 k
– 2.1 – V
3 %
mA
V
V
V
V
V
Output Section (GATE Pin)
AP3105NA/NV/NL/NR
Document number: DS36542 Rev. 1 - 2
Output Low Level
Output High Level
Output Clamping
Rising Time (Note 2)
Falling Time (Note 2)
=20mA, VCC=12V
I
O
=20mA, VCC=12V
I
O
=1nF, VCC=13V
C
L
=1nF, VCC=13V
C
L
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– –
8 – – V
11 13 15 V
– 150 250 ns
– 50 100 ns
1 V
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Electrical Characteristics
(Cont.) (@TA = +25°C, V
= 16V, unless otherwise specified.)
CC
Protection Section (CTRL Pin)
Delay Time Section
Source Current
Internal Reference Voltage
Low Threshold Trigger for
Latch
High Threshold Trigger for
Latch
Pull-up Current (Note 3)
Delay of Short Circuit Protection
Delay of Hiccup Protection
Note 2: Guaranteed by design.
Note 3: The sourcing current of CTRL pin must be limited below 5mA.Otherwise it may cause permanent damage to the device.
VCC OVP 25 μs
90 100 110 μA
– 1.5 – V
0.47 0.5 0.53 V
2.35 2.5 2.65 V
54 64 74 ms
2 mA
AP3105NA/NV/NL/NR
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Performance Characteristics
Startup Voltage vs. Ambient Temperature Shutdown Voltage vs. Ambient Temperature
18.0
17.5
17.0
16.5
16.0
15.5
15.0
Startup Voltage (V)
14.5
14.0
13.5
13.0
-40 -20 0 20 40 60 80 100 120 140
Startup Current vs. Ambient Temperature Operating Current vs. Ambient Temperature
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
Startup Current (A)
3.5
3.0
2.5
2.0
-40 -20 0 20 40 60 80 100 120 140
CTRL Utilization for Latch
Ambient Temperature (oC)
Ambient Temperature (oC)
10.0
9.5
9.0
8.5
8.0
Shutdown Voltage (V)
7.5
7.0
-40 -20 0 20 40 60 80 100 120 140
3.0
2.5
2.0
1.5
1.0
Operating Current (mA)
0.5
0.0
-40 -20 0 20 40 60 80 100 120 140
Ambient Temperature (oC)
Ambient Temperature (oC)
NTC
VCC
CTRL
VCC
CTRL
NTC
VCC
CTRL
NTC
OVP and OTP OVP OTP
AP3105NA/NV/NL/NR
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Operation Description
The AP3105NA/NV/NL/NR is specifically designed for off-line AC­DC power supply used in LCD monitor, notebook adapter and battery charger applications. It offers a cost effective solution with a versatile protection function.
Start-up Current and UVLO
The start-up current of AP3105NA/NV/NL/NR is optimized to realize ultra low current (5
charged more quickly. The direct benefit of low start-up current is the availability of using large start-up resistor, which minimizes the resistor power loss for high voltage AC input.
An UVLO comparator is included in AP3105NA/NV/NL/NR to detect the voltage on VCC pin. It ensures that AP3105NA/NV/NL/NR can draw adequate energy from hold-up capacitor during power-on. The turn-on threshold is 15.5V and the turn-off threshold is 8.6V.
Current Sense Comparator and PWM Latch
The AP3105NA/NV/NL/NR operates as a current mode controller, the output switch conduction is initiated by every oscillator cycle and is terminated when the peak inductor current reaches the threshold level established by the FB pin. The inductor current signal is converted to a voltage signal by inserting a reference sense resistor
. The inductor current under normal operating conditions is
R
S
controlled by the voltage at FB pin. The relation between peak inductor current (I
Moreover, FOCP with 1.8V threshold is only about 100ns delay, which can avoid some catastrophic damages such as secondary rectifier short test. Few drive cycles can alleviate the destruction range and get better protection.
Leading-edge Blanking
A narrow spike on the leading edge of the current waveform can usually be observed when the power MOSFET is turned on. A 250ns leading-edge blank is built-in to prevent the false-triggering caused by the turn-on spike. During this period, the current limit comparator is disabled and the gate driver can not be switched off.
At the time of turning on the MOSFET, a negative undershoot (maybe larger than -0.3V) can occur on the SENSE pin. So it is strongly recommended to add a small RC filter or at least connect a resistor “R” on this pin to protect the IC (Shown as Figure 1).
A typical) so that VCC capacitor can be
) and VFB is:
PK
RVI 3/)8.0(
SFBPK
5
VCC
CTRL
3
GND
1
GATE
AP3105NA/
NV/NL/NR
SENSE
FB
6
Necessar y
R
4
C
2
Large under shoot (m ore than
-0. 3 V) m ay damage t he SEN SE pin
Figure 1
Built-in Slope Compensation
It is well known that a continuous current mode SMPS may become unstable when the duty cycle exceeds 50%. The built-in slope compensation can improve the stability, so there is no need for design engineer to spend much time on that.
FB Pin and Short Circuit Protection
This pin is normally connected to the opto-coupler and always paralleled with a capacitor for loop compensation. When the voltage at this pin is greater than 4.2V and lasts for about 64ms, the IC will enter the protection mode. For AP3105NA/NV/NR, the system will enter hiccup mode to wait the V then the IC will try to restart until the failure removed. And when this voltage is less than 1.55V, the IC will stop the drive pulse immediately. Therefore, this feature can be used for short circuit protection, which makes the system immune from damage. Normally, output short makes the V because the opto-coupler is cut off.
V
Maintain Mode
CC
During light load or step load, V thus the PWM drive signal will be stopped, and there is no more new energy transferred due to no switching. Therefore, the IC supply voltage may reduce to the shutdown threshold voltage and system may enter the unexpected restart mode. To avoid this, the AP3105NA/NV/NL/NR hold a so-called V can supply energy to VCC.
When V comparator will output some drive signal to make the system switch and provide a proper energy to VCC pin. The V will cooperate the PWM and burst mode loop which can make the output voltage variation be within the regulation. This mode is very useful for reducing startup resistor loss and achieving a better standby performance with a low value VCC capacitor. The V not easy to touch the shutdown threshold during the startup process and step load. This will also simplify the system design. The normal VCC voltage is suggested to be designed a little higher than V
CC
the standby and step load performance.
decreases to a setting threshold, the VCC maintain
CC
maintain threshold thus can achieve the best balance between
decreasing to low UVLO level,
CC
value to the maximum
FB
will drop and be lower than 1.55V,
FB
maintain mode which
CC
maintain function
CC
is
CC
AP3105NA/NV/NL/NR
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Operation Description
System Protection and Pin Fault Protection
The AP3105NA/NV/NL/NR provides versatile system and pin fault protections. The OCP comparator realizes the cycle-by-cycle current limiting (OCP). In universal input line voltage, the IC realizes the constant over load protection (OLP). VCC over voltage protection can be applied as the primary OVP or opto-coupler broken protection. The AP3105NA/NV/NL/NR also has pin fault connection protection including floating and short connection. The floating pin protection include the SENSE, FB, etc.. The short pin protection includes the CTRL pin short protection. When these pins are floated or CTRL pin is shorted to ground, PWM switching will be disabled, thus protecting the power system.
Latch Protection Function
For some applications, the system requires the latch protection function. The CTRL pin has two kinds of modes to trigger the latch protection: high level trigger and low level trigger. The low threshold is 0.5V and high threshold voltage is 2.5V. Some version will have only one mode. Once the latch protection is triggered, the IC will disable the output signal, and the bulk capacitor provides the energy to IC through the startup resistor to ensure the IC disable the output (latch mode). This mode will be not released until the AC input is shut off. So, the de-latch time is mainly depending on the HV startup bulk capacitor value. Therefore, if the system wants a short de-latch time, it is better for the startup resistor take power
(Cont.)
from the point before the rectifier bridge as illustrated in Figure 2.
AC Mains
(90V to 265V)
5
3
2
VCC
CTRL
AP3105NA/NV/ NL/NR
FB
GND
C
BUS
6
GATE
4
SENSE
1
Figure 2
AP3105NA/NV/NL/NR
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Ordering Information
Product Version* NA: AP3105NA NV: AP3105NV
Package Part Number Marking ID Packing Type
NL: AP3105NL NR: AP3105NR
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AP3105
-
¯
Circuit Type
AP3105NAKTR-G1 GKN Tape & Reel
G1: Green
TR: Tape & Reel
Package K: SOT-23-6
AP3105NVKTR-G1 GKO Tape & Reel
SOT-23-6
AP3105NLKTR-G1 GKP Tape & Reel
AP3105NRKTR-G1 GKQ Tape & Reel
BCD Semiconductor's products, as designated with "G1" suffix in the part number, are RoHS compliant and green.
*Product Version Classification (with Different Protection Functions)
Product Version Frequency VOVP OLP&SOCP CTRL (Low) CTRL (High)
AP3105NA 65kHz Auto-Recoverable Auto-Recoverable Latch Auto-Recoverable
AP3105NV 65kHz Latch Auto-Recoverable Latch Latch
AP3105NL 65kHz Latch Latch Latch Latch
AP3105NR 65kHz Auto-Recoverable Auto-Recoverable Auto-Recoverable Latch
AP3105NA/NV/NL/NR
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Package Outline Dimensions
0.300(0.012)
0.500(0. 020)
Pin 1 Mark
2.650(0. 104 )
3.000(0. 118 )
(All dimensions in mm(inch).)
SOT-23-6
2.820(0.111)
3.100(0.122)
456
0° 8°
0.200(0.008)
0.300(0.012)
0.600(0.024)
1.500(0.059)
1.700(0.067)
123
0.950(0.037)TYP
1.800(0. 07 1)
2.000(0. 07 9)
AP3105NA/NV/NL/NR
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0.700(0.028)REF
0.000(0.000)
0.150(0.006)
0.900(0.035)
1.300(0.051)
1.450(0.057) MAX
0.100(0.004)
0.200(0. 00 8)
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Suggested Pad Layout
Y
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SOT-23-6
EE
G
Z
X
Dimensions
AP3105NA/NV/NL/NR
Document number: DS36542 Rev. 1 - 2
Value 3.600/0.142 1.600/0.063 0.700/0.028 1.000/0.039 0.950/0.037
Z
(mm)/(inch)
G
(mm)/(inch)
X
(mm)/(inch)
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Y
(mm)/(inch)
E
(mm)/(inch)
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DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated.
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2013, Diodes Incorporated
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IMPORTANT NOTICE
LIFE SUPPORT
AP3105NA/NV/NL/NR
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