Diodes AP3106 Manuel d'utilisateur télécharger pdf

Preliminary Datasheet

HIGH VOLTAGE GREEN MODE PWM CONTROLLER AP3106

Sep. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited

General Description

The AP3106 is a high voltage start-up, current mode

PWM controller with green-mode power-saving

operation.

The PWM switching frequency at normal operation is

externally programmable and trimmed to a narrow

range.

The AP3106 integrates a proprietary internal

frequency dithering function that helps to reduce EMI

emission of a power supply with minimum line filters

used.

To minimize the standby power consumption, a

proprietary adaptive green-mode function is available

to implement frequency modulation under light-load

conditions. To avoid acoustic noise problems, the

minimum PWM frequency is set at about 26kHz.

The AP3106 integrates a lot of functions such as the

Lead-Edge Blanking (LEB) of the current sensing,

internal slope compensation, line compensation, and

several protection features that include

cycle-by-cycle current limit (OCP), over voltage

protection, OTP, OLP and brownout protection.

The AP3106 is available in SOIC-7 package to

realize a compact size.

Features

•

High-voltage Start-up Circuit

• Low Start-up Current: 15µA (Max.)

• Current Mode Control

• Programmable PWM Switching Frequency

• Non-audible-noise Green Mode Control

• LEB (Leading-Edge Blanking) on SENSE Pin

• Fast OCP for Abnormal Short Circuit

• Frequency Linearly Decreasing at Light Load

• Soft Driving

• Internal Slope Compensation

• Built-in Brownout Protection

• Useful Pin Fault Protection

CS Pin Floating

RI Pin Short to Ground

RI Pin Floating

• Comprehensive System Protection

VCC Over Voltage Protection (VOVP)

Over Temperature Protection (OTP)

Constant Over Load Protection (COLP)

Short Circuit Protection (SCP)

• Compact Size SOIC-7 Package

Applications

• Switching AC/DC Adaptor

• LCD Monitor/TV Power

• Open Frame Switching Power Supply

Figure 1. Package Type of AP3106

SOIC-7

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