Diodes AP3106 User Manual

HIGH VOLTAGE GREEN MODE PWM CONTROLLER AP3106

Preliminary Datasheet

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 prot ection.

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

SOIC-7

Figure 1. Package Type of AP3106

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

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Preliminary Datasheet

HIGH VOLTAGE GREEN MODE PWM CONTROLLER AP3106

Pin Configuration

M Package

(SOIC-7)

Figure 2. Pin Configuration of AP3106 (Top View)

Pin Description

Pin Number Pin Name Function

1

2 FB

3 SENSE Current sense pin. Connect it to sense the MOSFET current

4 GND Ground

5 GATE Gate drive output to drive the external MOSFET

RI Set the bias current to determine the normal switching frequency

Voltage feedback pin. By connecting an opto-coupler to close the control loop, it can achieve the system regulation

6 VCC Supply voltage pin

Connect this pin to positive terminal of bulk capacitor to provide the

7 HV

startup current for the controller. When VCC voltage reachs UVLO (on), this HV loop will be turned off to save the power loss of the startup circuit

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

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Preliminary Datasheet

HIGH VOLTAGE GREEN MODE PWM CONTROLLER AP3106

Functional Block Diagram

HV

7

VCC

6

35V

OLP

FB

0.3V

UVLO

16V

8.6V UVLO

VCC OVP

OLP

28V

OVP

35ms Timer

OSC with

Frequency Dithering

Burst

Mode

OTP

VCC OVP

SCP

UVLO

VCC

Line Sense

Internal Bias

25 s Filter

PG

D

DFF

CLK

RB

QB

&

VREF

Protection

Relative Blocks

140℃

Soft

Driver

O/S

18V

OTP

R3

1

5

RI

GATE

OLP

PWM

0.85V

4ms

Soft Start

OCP

Line Sense

250ns LEB

FOCP

3

SENSE

FB

GND

R1

2

4

2R2

OLP

1.1V

R2

Figure 3. Functional Block Diagram of AP3106

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

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Preliminary Datasheet

HIGH VOLTAGE GREEN MODE PWM CONTROLLER AP3106

Ordering Information

AP3106 -

Circuit Type G1: Green

Package Blank: Tube M: SOIC-7 TR: Tape & Reel

Package

SOIC-7

Temperature

Range

-40 to 85°C

Part Number Marking ID Packing Type

AP3106M-G1 3106M-G1 AP3106MTR-G1 3106M-G1

Tape & Reel

Tube

BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green.

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

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