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Preliminary Datasheet

Low-Power Off-line PSR LED Controller AP1686

Nov. 2012 Rev. 1.1 BCD Semiconductor Manufacturing Limited

General Description

The AP1686 is a high performance AC/DC power

supply controller for LED lighting application. The

device uses Pulse Frequency Modulation (PFM)

method to build discontinuous conduction mode

(DCM) flyback power supplies.

The AP1686 provides accurate constant voltage,

constant current (CV/CC) regulation without

requiring an opto-coupler and the secondary control

circuitry. It also eliminates the need of loop

compensation circuitry while maintaining good

stability. The AP1686 can achieve excellent

regulation and high average efficiency, yet meets

no-load consumption less than 30mW.

It also has an adjustable built-in line compensation

function to achieve tight CC.

The AP1686 is available in SOT-23-6 package.

Features

• Primary Side Control for Tight Constant Current

and Constant Voltage

• 30mW No-load Input Power

• Bipolar Junction Transistor (BJT) Driving

• Open Circuit Protection

• Over Voltage Protection

• Short Circuit Protection

• SOT-23-6 Package

Applications

• LED Driver

Figure 1. Package Type of AP1686

SOT-23-6

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