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Diodes Semiconductor Electronic Components Datasheet

AP3771 Datasheet

LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER

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AP3771 pdf
A Product Line of
Diodes Incorporated
AP3771
LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
Description
Pin Assignments
The AP3771 is a high performance AC/DC power supply controller for
battery charger and adapter applications. The device uses Pulse
Frequency Modulation (PFM) method to build discontinuous
conduction mode (DCM) flyback power supplies.
The AP3771 provides accurate constant voltage, constant current
(CV/CC) regulation without requiring an opto-coupler and the
secondary control circuitry. It also eliminates the need of loop
compensation circuitry while maintaining good stability. The AP3771
can achieve excellent regulation and high average efficiency, yet
meets no-load consumption less than 30mW. It can also achieve
excellent dynamic performance while maintaining 30mW standby
power with AP4340.
(Top View)
Pin 1 Mark
GATE 1
GND 2
VCC 3
6 FB
5 CPC
4 CS
The AP3771 has a built-in fixed cable voltage drop compensation
function. The cable compensation voltage is set as 7% and 3% of the
rated output voltage. It also has an adjustable built-in line
compensation function to achieve tight CC.
SOT26
The AP3771 drives MOSFET to achieve the high switching frequency
and high efficiency.
The AP3771 is available in SOT26 package.
Features
Applications
Adapters/Chargers for Cell/Cordless Phones, PDAs, MP3 and
Other Portable Devices
LED Driver
Standby and Auxiliary Power Supplies
Primary Side Control for Tight Constant Current and Constant
Voltage
30mW No-load Input Power
Excellent Dynamic Performance with AP4340 (For 5V
Application)
MOSFET Driving
Proprietary Adjustable Line Compensation for CC Variation
Constant and Built-in 7% and 3% Voltage Drop Compensation
Enhanced Audio Noise Suppression
Open Circuit Protection
Over Voltage Protection
Short Circuit Protection
SOT26 Package
Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. GreenDevice (Note 3)
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.
AP3771
Document number: DS37281 Rev. 1 - 2
1 of 11
www.diodes.com
May 2014
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AP3771 Datasheet

LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER

No Preview Available !

AP3771 pdf
Typical Applications Circuit
A Product Line of
Diodes Incorporated
AP3771
D4 to D7
+
C1 R1
R2
+
C2
D1
VCC
CS GATE
AP3771
D8
R11
R12
C5
CPC
FB
GND
RLINE
T1 D2
R5 C3
Np
D3
R14
R8 R9
OUT VCC
Ns GND
AP4340
+
C4
VO +
R10
VO-
Q1
R6
R13
Na
R7
Rs
5V/1.8A Output for Battery Charger of Tablet PC
(The AP4340 Is Used to Achieve Fast Dynamic Response)
D4 to D7
+
C1 R1
R2
+
C2
D1
VCC
CS GATE
AP3771
D8
R11
R12
C5
CPC
FB
GND
RLINE
R8 C6
T1
R5 C3
Np
D3
R14
Ns
D2
Q1
R6
R13
Na
VO +
+
C4 R10
VO-
R7
Rs
12V/1.5A Output for Adapter
AP3771
Document number: DS37281 Rev. 1 - 2
2 of 11
www.diodes.com
May 2014
© Diodes Incorporated


Part Number AP3771
Description LOW-POWER OFF-LINE PRIMARY SIDE REGULATION CONTROLLER
Maker Diodes
Total Page 11 Pages
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