AP3706 Series

NRND = Not Recommended for New Design

Catalog

NRND = Not Recommended for New Design

Part	Output Isolation	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Fault Protection	Package / Case	Package / Case [y]	Package / Case [x]	Voltage - Start Up	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Mounting Type	Topology	Internal Switch(s)
Diodes Inc AP3706UMTR-G1	Isolated	8-SOIC	85 °C	-40 °C	Open Circuit Over Voltage Short Circuit	8-SOIC	3.9 mm	0.154 in	18.5 V	30 V	7.3 V	Surface Mount	Flyback

Catalog

NRND = Not Recommended for New Design

Key Features

• Primary Side Control for Rectangular Constant Current and Constant Voltage Output

• Eliminates Opto-Coupler and Secondary CV/CC Control Circuitry

• Eliminates Control Loop Compensation Circuitry

• Flyback Topology in DCM Operation

• Random Frequency Modulation to Reduce System EMI

• Valley Turn on of External Power NPN Transistor

• Built-in Soft Start

• Open Circuit Protection

• Over Voltage Protection

• Short Circuit Protection

Description

The AP3706 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 AP3706 provides constant voltage, constant current (CV/CC) regulation without requiring an optocoupler and secondary control circuitry. It also eliminates the need of loop compensation circuitry while maintaining stability. The AP3706 achieves excellent regulation and high power efficiency, the no-load power consumption is less than 200mW at 265VAC input.