AP3983B Datasheet, PDF (1/13 Pages) Diodes Incorporated – HIGH FREQUENCY PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS

AP3983B/C/D
HIGH FREQUENCY PRIMARY SIDE POWER SWITCHER FOR OFF-LINE SMPS
Description
Pin Assignments
The AP3983B/C/D are series of high frequency power switcher for
power supplies with better conversion efficiency, better voltage &
current accuracy, and improved protection functions. Typical
applications include charger, adapter for ADSL, home appliance
power supply, LED lighting power supply and PC auxiliary power
supplies. The AP3983B/C/D with built in MOSFET, regulates the
output voltage and current in the primary side by piece-wise 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 AP3983B/C/D has good transient characteristics. Typically,
minimal voltage of 4.3V at PCB side can be achieved for dynamic test
of 5V application system.
The AP3983B/C/D provides operating frequency dithering function to
improve EMC performance of power supply. The AP3983B/C/D also
has built-in fixed cable voltage drop compensation and adjustable line
voltage compensation.
The AP3983B/C/D solution has fewer component number, smaller
size, and lower total cost.
The AP3983B/C is packaged in SO-7. The AP3983C/D is packaged in
PDIP-7.
(Top View)
CPC 1
FB 2
VCC 3
CS 4
7 GND
6D
5_D
SO-7 For AP3983B/C
(Top View)
CPC 1
FB 2
VCC 3
CS 4
7 GND
6D
5D
PDIP-7 For AP3983C/D
Features
 Primary Side Control for Eliminating Opto-coupler
 Better Transient Characteristics
 Built-in N Channel MOSFET with 650 BVDSS
 Low Start-up Current: 0.2A (Typ.)
 Internal Output Cable Voltage Drop Compensation
 Hiccup Function to Improve Short Circuit Protection
 Better Over Voltage Protection
 Better Over Temperature Protection
 Low Total Cost Solution
 Output Power Range (Note 1):
AP3983B for 6W Adapter
AP3983C (SO-7) for 7.5W
AP3983C (PDIP-7) for 10W Adapter
AP3983D for 18W Adapter
 Totally Lead-Free & Fully RoHS Compliant (Notes 2 & 3)
 Halogen and Antimony Free. “Green” Device (Note 4)
Applications
 Adapters
 Set Top Boxes
 Auxiliary Supplies
 Appliances
 LED Driver
Notes:
1. Typical continuous power in a non-ventilated enclosed adapter measured at +50°C ambient.
2. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
3. 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.
4. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AP3983B/C/D
Document number: DS36784 Rev. 4 - 2
1 of 13
www.diodes.com
July 2016
© Diodes Incorporated