AP3983R Datasheet, PDF (1/15 Pages) Diodes Incorporated – PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER

AP3983R
PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER
Description
Pin Assignments
The AP3983R is a power switcher for power supplies with better
conversion efficiency, better voltage & current accuracy, and improved
protection functions. Typical applications include chargers and
adapters. The AP3983R with built-in MOSFET, regulates the output
voltage and current in the primary side by piecewise Pulse Frequency
Modulation (p-PFM) in discontinuous conduction mode (DCM). The
system operating frequency reduces linearly from heavy load to light
load in each interval of the p-PFM, and enters constant current mode
when the load current equals to the maximum system output current.
The AP3983R provides accurate constant voltage (CV), constant
current (CC) and outstanding dynamic performance without requiring
an opto-coupler. It also eliminates the need for loop compensation
circuitry while maintaining stability.
The AP3983R has a built-in fixed cable voltage drop compensation of
8% and adjustable line-voltage compensation.
The AP3983R achieves excellent regulation and high average
efficiency, less than 2s startup time for 75mW standby power solution.
When the AP3983R is adopted with APR3415, good undershoot
performances can be achieved.
The AP3983R is packaged in SO-7.
Applications
(Top View)
CPC 1
FB 2
VCC 3
CS 4
7 GND
6D
5_D
SO-7 (M Package) For AP3983R
Features
 Built-in N Channel MOSFET with 700 BVDSS
 Less than 75mW Standby Power Consumption
 Meet Efficiency Requirement of COC Trier 2
 Valley Turn-on to Reduce Switching Loss and Improve EMI
 Piecewise Frequency Reduction to Enhance Conversion
Efficiency and Suppress Audio Noise
 Overvoltage Protection (OVP)
 Over-Temperature Protection (OTP)
 Short Circuit Protection (SCP) with Hiccup
Operating Frequency Jitter Function for Conductive EMI
Suppression
 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
 Halogen and Antimony Free. “Green” Device (Note 3)
 Adapters/Chargers
 Standby and Auxiliary Power Supplies
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.
AP3983R
Document number: DS38247 Rev. 3 - 2
1 of 15
www.diodes.com
June 2016
© Diodes Incorporated