AP3783 Datasheet, PDF (1/17 Pages) Diodes Incorporated – PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER

AP3783
PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER
Description
Pin Assignments
The AP3783 is a high performance AC/DC power supply controller for
battery charger and adapter applications. The controller regulates the
output voltage and current in the primary side by piece-wise Pulse
Frequency Modulation (p-PFM) in discontinuous conduction mode
(DCM).
(Top View)
Pin 1 Mark
The AP3783 provides accurate constant voltage (CV), constant
current (CC) and outstanding dynamic performance without requiring
an opto-coupler. It also eliminates the need of loop compensation
circuitry while maintaining stability.
The AP3783 provides valley turn-on function, operating frequency
Jitter function (about 5.5% frequency change every 256μs) from light
to full load range and 3-segment drive current to improve the power
supply EMI performance. The AP3783 also has built-in fixed cable
voltage drop compensation (10%, 7% and 4% of nominal system
output voltage to meet various cables with different length and gauge)
and adjustable line voltage compensation.
The AP3783 is packaged in SOT26.
Applications
 Adapters/Chargers
 LED Lighting
 Standby and Auxiliary Power Supplies
CS ₁
GND 2
VCC 3
6 ^CPC
5 DRI
4 FB
SOT26
Features
 Less than 75mW Standby Power Consumption
 Meet Efficiency Requirement of COC Trier2
 Valley Turn-on to Reduce Switching Loss and Improve EMI
 Piece-wise Frequency Reduction to Enhance Conversion
Efficiency and Suppress Audio Noise
 Over Voltage Protection (OVP)
 Over Temperature Protection (OTP)
 Short Circuit Protection (SCP) with Hiccup
 3-Segment Drive Current for Radiative EMI Suppression
 Operating Frequency Jitter Function for Conductive EMI
Suppression
 Drive MOSFET for 5W to 30W Battery Charger/Adapter
Applications
 SOT26 SMD Package Comply with Level 3 of IPC/JEDEC J-STD-
033A
 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
 Halogen and Antimony Free. “Green” Device (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.
AP3783
Document number: DS37429 Rev. 6 - 2
1 of 17
www.diodes.com
December 2015
© Diodes Incorporated