AP3781 Series

Primary Side Regulated Switching Mode Power Supply Controller

Catalog

Primary Side Regulated Switching Mode Power Supply Controller

Part	Output Isolation	Internal Switch(s)	Supplier Device Package	Package / Case	Package / Case [y]	Package / Case [x]	Topology	Voltage - Start Up	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Fault Protection	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]
Diodes Inc AP3781S-13	Non-Isolated		8-SO	8-SOIC	3.9 mm	0.154 in	Flyback	16 V	85 °C	-40 °C	Surface Mount	Current Limiting Open Loop Over Temperature Over Voltage Short Circuit	30 V	10 V

Catalog

Primary Side Regulated Switching Mode Power Supply Controller

Key Features

• Primary Side Control for Eliminating Opto-Coupler

• 75mW No-Load Input Power

• Flyback Topology in DCM Operation

• External Adjustable Over Temperature Protection

• Fixed Internal Cable Compensation: 3%

• External Cable Compensation: 3% to 8%

• Multiple Segment AM/PFM Control Mode to Improve Audio Noise and Efficiency

• Ultra Low Under Voltage Protection, Support Wide Operating Voltage for Power Tool Motor Drive

• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

• Halogen and Antimony Free. "Green" Device (Note 3)

• For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative.https://www.diodes.com/quality/product-definitions/

Description

The AP3781 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 Pulse Frequency Modulation in Discontinuous Conduction Mode (DCM).