SF5590SGT [SIFIRST]

HV-mWTMãÎ·-BalanceTM PWM Controller Programmable Fsw;


型号：	SF5590SGT
厂家：	SIFIRST
描述：	HV-mWTMãÎ·-BalanceTM PWM Controller Programmable Fsw
文件：	总2页 (文件大小：81K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SF5590

HV-mW^TM、η-Balance^TMPWM Controller ^{Programmable Fsw}

FEATURES

GENERAL DESCRIPTION

SF5590 is a high performance, highly integrated

current mode PWM controller for medium to large

offline flyback power converter applications.

◆ Programmable Switching Frequency

◆ Proprietary HV-mW^TMto Achieve Less than

50mW Standby Power

In SF5590, PWM switching frequency with shuffling is

externally programmable, which can reduce

conduction EMI emission of a power supply. When

the output power demands decrease, the IC

decreases switching frequency based on the

◆ Proprietary η-Balance^TMControl to Boost

Light Load Efficiency

◆ Proprietary “Zero OCP/OPP Recovery Gap”

Control

◆ Proprietary

Compensation”

◆ Built-in Soft Start Function

◆ Pin Floating Protection

◆ Frequency Reduction and Burst Mode Control

for Energy Saving

◆ Current Mode Control

◆ Built-in Frequency Shuffling

◆ Built-in Synchronous Slope Compensation

◆ Cycle-by-Cycle Current Limiting

◆ Leading Edge Blanking (LEB)

◆ Constant Power Limiting

“Audio

Noise

Free

OCP

proprietaryη-Balance^TMcontrol to boost power

conversion efficiency at the light load. SF5590 also

integrates proprietary HV-mW^TMtechnology to

achieve less than 50mW standby power.

SF5590 can achieve “Zero OCP/OPP Recovery

Gap” using SiFirst’s proprietary control algorithm.

SF5590 also has built in proprietary “Audio Noise

Free OCP Compensation”, which can achieve

constant power limiting and can achieve audio noise

operation at heavy loading when line input is 90VAC.

SF5590 integrates functions and protections of Under

Voltage Lockout (UVLO), VDD Over Voltage

Protection (OVP), Cycle-by-cycle Current Limiting

(OCP), Pin Floating Protection, Over Load Protection

(OLP), Soft Start, Gate Clamping, VDD Clamping, etc.

In SF5590, the protection functions are auto-recovery

mode protection.

◆ VDD OVP & Clamp

◆ VDD Under Voltage Lockout (UVLO)

APPLICATIONS

Offline AC/DC Flyback Converter for

◆ AC/DC Adaptors

SF5590 is available in SOP8 and DIP8 packages.

◆ Open-frame SMPS

◆ Print Power, Scanners, and Motor Drivers

TYPICAL APPLICATION

©SiFirst Technology

- 1 -

Confidential

SiFirst_DS_5590_V1.2

SF5590

Pin Configuration

Ordering Information

Part Number

SF5590SG

Top Mark

SF5590SG

SF5590SGT

SF5590DP

Package

Tape & Reel

SOP8

DIP8

Green

RoHS

SF5590SGT

SF5590DP

Yes

Marking Information

YWW: Year&Week code

©SiFirst Technology

- 2 -

Confidential

SiFirst_DS_5590_V1.2

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