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部品番号 AP3125HB
部品説明 GREEN MODE PWM CONTROLLER
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AP3125HB Datasheet, AP3125HB PDF,ピン配置, 機能
A Product Line of
Diodes Incorporated
AP3125HA/HB
GREEN MODE PWM CONTROLLER
Description
Pin Assignments
The AP3125HA/HB is a current mode PWM controller which is
optimized for high performance, low standby power and cost effective
offline flyback converters.
The PWM switching frequency at normal operation is internally fixed
(about 100kHz). In middle load, the IC will enter green mode to
improve system efficiency with the help of frequency foldback. A
minimum switching frequency (about 20kHz) is set to avoid the
audible noise. In no load or light load, the IC will enter the burst mode
to minimize standby power. Furthermore, the frequency dithering
function is built-in to reduce EMI emission.
Internal slope compensation allows more stable Peak-Current Mode
control over wide range of input voltage and load conditions. Internal
line compensation ensures constant output power limit over entire
universal line voltage range.
Comprehensive protection features are included, such as cycle-by-
cycle current limit (OCP), VCC Over Voltage Protection (VOVP),
internal OTP, Over Load Protection (OLP) and pinsfault protection.
AP3125HA features external OTP/OVP by using a minimal number of
external components with CTRL pin. AP3125HB features built-in
Brownout (BNO) and Line Over Voltage Protection (LOVP).
(Top View)
Pin 1 Mark
GND 1
FB 2
CTRL 3
6 GATE
5 VCC
4 SENSE
SOT26 (For AP3125HA)
(Top View)
Pin 1 Mark
Features
Very Low Start-up Current
Current Mode Control
Non-audible-noise Green-mode Control
Internal Slope Compensation
Soft Start During Startup Process
Frequency Fold Back for High Average Efficiency
Secondary Winding Short Protection with FOCP
Soft Switching for Reducing EMI
VCC Maintain Mode
Brownout Protection (BNO, AP3125HB)
Line Over Voltage Protection (LOVP, AP3125HB)
Useful Pin Fault Protection:
SENSE Pin Floating
CTRL Pin Short to Ground (AP3125HA)
FB/Opto-coupler Open/Short
Comprehensive System Protection Feature:
VCC Over Voltage Protection (VOVP)
Over Load Protection (OLP)
External OTP/OVP with CTRL Pin Protection (AP3125HA)
Mini Size Package of SOT26
Pin to Pin Compatible with AP3125A/V/R/L/B
Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. GreenDevice (Note 3)
GND 1
FB 2
BNO 3
6 GATE
5 VCC
4 SENSE
SOT26 (For AP3125HB)
Applications
Switching AC-DC Adapter/Charger
ATX/BTX Auxiliary Power
Set-top Box (STB) Power Supply
Open Frame Switching Power Supply
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AP3125HA/HB
Document number: DS37169 Rev. 3 - 2
1 of 13
www.diodes.com
July 2014
© Diodes Incorporated

--------------------------------------------
AP3125HB pdf, 電子部品, 半導体, ピン配列
Pin Descriptions
Pin Number
AP3125HA
AP3125HB
11
22
3
3
44
55
66
A Product Line of
Diodes Incorporated
AP3125HA/HB
Pin Name
Function
GND
FB
CTRL
BNO
SENSE
VCC
GATE
Signal ground. Current return for driver and control circuits
Feedback. Directly connected to the opto-coupler
Latch trigger if this pin voltage drops below a threshold or over another threshold,
leave CTRL pin open if this function is not needed. Connecting a NTC thermistor to
GND can achieve OTP protection
Brownout protection pin, connect a resistor divider to set the brownout level
Current Sense
Supply voltage of driver and control circuits
Gate driver output
Functional Block Diagram
VCC
FB
GND
SENSE
5
32V
16V
7.6V
28V
UVLO
VDD
Internal
Bias
VCC_OVP
VCC_OVP
OLP
FOCP
CTRL_H
OTP
BROWNOUT
CTRL_L
LOVP
Auto
Recovery
Protection
Latch-off
Protection
VCC
Driver 13V
6
GATE
Soft
Start SS OSC with
2 Frequency
Jitter
0.3V
2R
1
1.3V
70mS OLP
Debounce
VDD
D
DFF
CLK RB
Q
CTRL_H
CTRL_L
VDD
3V 100mA
10k
1V
0.6V
3
CTRL
(AP3125HA)
4.5V
R
4
SS PWM
250ns LEB
1.80V
FOCP
Line_OVP
Brownout
50mS
Debounce
4.2V
0.95V
0.9V
BNO
3(AP3125HB)
5.5V
0.95V
Line
Compensation
OCP
OTP
+150oC /+125oC
AP3125HA/HB
AP3125HA/HB
Document number: DS37169 Rev. 3 - 2
3 of 13
www.diodes.com
July 2014
© Diodes Incorporated





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