Features

mWSaver™ Technology

 Achieves Low No-Load Power Consumption:

< 40 mW at 230 VAC (EMI Filter Loss Included)

 Meets 2013 ErP Standby Power Regulation

(< 0.5 W Consumption with 0.25 W Load) for

ATX Power and LCD TV Power

 Eliminates X-Cap Discharge Resistor Loss with

AX-CAP®

Technology

 Operates at Linearly Decreased Switching

Frequency at Light-Load Condition; in Advanced

Burst Mode Operation at No-Load Condition

 700 V High-Voltage JFET Startup Circuit Eliminates

Startup Resistor Loss

Highly Integrated with Rich Features

 Internal Avalanche-Rugged 700 V SenseFET

 Built-in 5 ms Soft-Start

 Peak-Current-Mode Control

 Cycle-by-Cycle Current Limiting

 Leading-Edge Blanking (LEB)

 Synchronized Slope Compensation

 Proprietary Asynchronous Jitter to Reduce EMI

Advanced Protection

 Internal Overload / Open-Loop Protection (OLP)

 VDD Under-Voltage Lockout (UVLO)

 VDD Over-Voltage Protection (OVP)

 Constant Power Limit (Full AC Input Range)

 Internal Latch Protection (OLP, VDD OVP, OTP)

 Internal OTP Sensor with Hysteresis

Description

The FSB137HL is a next-generation, Green-Mode,

Fairchild Power Switch (FPS™) that incorporates

Fairchild’s innovative mWSaver™ technology, which

dramatically reduces standby and no-load power

consumption, enabling conformance to all worldwide

Standby Mode efficiency guidelines. It integrates an

advanced current-mode pulse width modulator (PWM)

and an avalanche-rugged 700 V SenseFET in a single

package, allowing auxiliary power designs with higher

standby efficiency, reduced size, improved reliability,

and lower system cost than prior solutions.

Fairchild Semiconductor’s mWSaver™ technology

offers best-in-class minimum no-load and light-load

power consumption. An innovative Ax-CAP®

method,

one of the five proprietary mWSaver™ technologies,

minimizes losses in the EMI filter stage by eliminating

the X-cap discharge resistors while meeting IEC61010-1

safety requirements. mWSaver™ Green Mode gradually

decreases switching frequency as load decreases to

minimize switching losses.

Proprietary asynchronous jitter decreases EMI emission

and built-in synchronized slope compensation allows

stable peak-current-mode control over a wide range of

input voltage. The proprietary internal line compensation

ensures constant output power limit over the entire

universal line voltage range.

Requiring a minimum number of external components,

FSB137HL provides a basic platform that is well suited

for the cost-effective flyback converter design with low

standby power consumption.

Applications

General-purpose switched-mode power supplies

(SMPS) and flyback power converters, including:

 Auxiliary Power Supply for PC, Server, LCD TV,

and Game Console

 SMPS for VCR, SVR, STB, DVD, and DVCD

Player, Printer, Facsimile, and Scanner

 General Adapter

 LCD Monitor Power / Open-Frame SMPS