FAN6756MRMY View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

FAN6756MRMY

mWSaver™ PWM Controller

Fairchild Semiconductor 

January 2013

FAN6756— mWSaver™ PWM Controller

Features

 Single-Ended Topologies, such as Flyback and

Forward Converters

 mWSaver™ Technology

- Achieves Low No-Load Power Consumption:

< 30 mW at 230 VAC (EMI Filter Loss Included)

- Eliminates X Capacitor Discharge Resistor Loss

with AX-CAP® Technology

- Linearly Decreases Switching Frequency to

23 kHz

- Burst Mode Operation at Light-Load Condition

- Impedance Modulation in “Deep” Burst Mode

- Low Operating Current (450 µA) in Deep Burst

Mode

- 500 V High-Voltage JFET Startup Circuit to

Eliminate Startup Resistor Loss

 Highly Integrated with Rich Features

- Proprietary Frequency Hopping to Reduce EMI

- High-Voltage Sampling to Detect Input Voltage

- Peak-Current-Mode Control with Slope

Compensation

- Cycle-by-Cycle Current Limiting with Line

Compensation

- Leading Edge Blanking (LEB)

- Built-In 7 ms Soft-Start

 Advanced Protections

- Brown-in / Brownout Recovery

- Internal Overload / Open-Loop Protection (OLP)

- VDD Under-Voltage Lockout (UVLO)

- VDD Over-Voltage Protection (VDD OVP)

- Over-Temperature Protection (OTP)

- Current-Sense Short-Circuit Protection (SSCP)

Description

The FAN6756 is a next-generation Green Mode PWM

controller with innovative mWSaver™ technology, which

dramatically reduces standby and no-load power

consumption, enabling compliance with worldwide

Standby Mode efficiency guidelines.

An innovative AX-CAP® method minimizes losses in the

EMI filter stage by eliminating the X-cap discharge

resistors while meeting IEC61010-1 safety

requirements. “Deep” Burst Mode clamps feedback

voltage and modulates feedback impedance with an

impedance modulator during Burst Mode operation,

which forces the system to operate in a Deep Burst

Mode with minimum switching losses.

Protections ensure safe operation of the power system

in various abnormal conditions. A proprietary frequency-

hopping function decreases EMI emission and built-in

synchronized slope compensation allows more stable

Peak-Current-Mode control over a wide range of input

voltage and load conditions. The proprietary internal line

compensation ensures constant output power limit over

the entire universal line voltage range.

Requiring a minimum number of external components,

FAN6756 provides a basic platform that is well suited for

cost-effective flyback converter designs that require

extremely low standby power consumption.

Applications

Flyback power supplies that demand extremely low

standby power consumption, such as:

 Adapters for Notebooks, Printers, Game Consoles,

etc.

 Open-Frame SMPS for LCD TV, LCD Monitors,

Printer Power, etc.

Related Resources

 Evaluation Board: FEBFAN6756MR_T03U065A

Ordering Information

Part Number

Protections(1)

Operating

OLP OVP OTP SSCP Temperature Range

Package

Packing

Method

FAN6756MRMY

A/R L L

A/R

FAN6756MLMY

LLL

A/R

-40 to +105°C

8-Pin, Small Outline

Package (SOP)

Tape & Reel

Note:

1. A/R = Auto Recovery Mode protection, L = Latch Mode protection.

© 2011 Fairchild Semiconductor Corporation

FAN6756 • Rev. 2.0.0

www.fairchildsemi.com

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