Datasheet > SF1565SG

SF1565SG

更新时间： 2024-02-20 14:06:20

品牌	Logo	应用领域
赛威科技 - SIFIRST		/
页数	文件大小	规格书
12页	661K
描述
Highly Integrated Current Mode PWM Controller

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SF1565SG 数据手册

SF1565

Highly Integrated Current Mode PWM Controller

FEATURES

GENERAL DESCRIPTION

SF1565 is a high performance, highly integrated

current mode PWM controller for medium to large

offline flyback converter applications.

◆ Built-in Soft Start Function

◆ Very Low Startup Current

◆ Frequency Reduction and Burst Mode Control

for Energy Saving

In SF1565, the PWM switching is internally trimmed

to tight range. To improve EMI performance, the IC

integrates frequency shuffling function to reduce

conduction EMI emission of a power supply. The IC

also integrates Constant Power Limiting block to

achieve constant output power limit from 90VAC to

264VAC.

Under light load conditions, a green mode function

can continuously decrease the switching frequency.

Under zero-load conditions, the power supply enters

into burst mode and provides excellent efficiency

without audio noise generated. This green mode

function enables power supplies to meet international

power conservation requirements.

◆ Built-in Frequency Shuffling

◆ Programmable Switching Frequency

◆ Built-in Synchronous Slope Compensation

◆ Cycle-by-Cycle Current Limiting

◆ Pins Floating Protection

◆ High Voltage CMOS Process with Excellent

ESD Protection

◆ Current Mode Control

◆ Built-in Leading Edge Blanking (LEB)

◆ Constant Power Limiting

◆ Audio Noise Free Operation

◆ VDD OVP & Clamp

◆ VDD Under Voltage Lockout (UVLO)

SF1565 integrates functions and protections of Under

Voltage Lockout (UVLO), VDD Over Voltage

Protection (OVP), Soft Start, External Programmable

Over Temperature Protection (OTP), Cycle-by-cycle

Current Limiting (OCP), Over Load Protection (OLP),

Pins Floating Protection, RI Pin Short-to-GND

Protection, GATE Clamping, VDD Clamping, Leading

Edge Blanking (LEB).

APPLICATIONS

Offline AC/DC Flyback Converter for

◆ AC/DC Power Adaptors

◆ Open-frame SMPS

◆ Print Power, Scanners, and Motor Drivers

In SF1565, the all protection functions are auto-

recovery mode protection.

SF1565 is available in SOP-8 and DIP-8 packages.

TYPICAL APPLICATION

EMI

AC IN

Filter

DC Out

SF1565

GND

GATE

VIN

VDD

TL431

NTC

©SiFirst Technology

- 1 -

Confidential

SiFirst_DS_1565_V1.2

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SF1575AT	LGE	获取价格	暂无描述
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SF1575BA02505SLF	IDT	获取价格	SAW Filter, 1 Function(s), 1575.42MHz
SF1575BA02506S	SPECTRUM	获取价格	1575.42 MHz SAW Filter 55 MHz Bandwidth
SF1575BA02506SLF	IDT	获取价格	SAW Filter, 1 Function(s), 1575.42MHz
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