Datasheet > GR8874KAL

GR8874KAL

更新时间： 2024-11-22 00:59:23

品牌	Logo	应用领域
绿芯 - GRENERGY		/
页数	文件大小	规格书
15页	904K
描述
Green-Mode PWM Controller with Integrated Protections

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GR8874KAL 数据手册

GR8874

Green-Mode PWM Controller with Integrated Protections

Applications

ꢀ

Features

Open-frame SMPS

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High-voltage (500V) startup circuit

Switching AC/DC adapter

Standby 100mW solution

Current mode PWM

Description

Very low startup current (<20uA)

Under-voltage lockout (UVLO)

Non-audible-noise green-mode control

Programmable switching frequency

Cycle-by-cycle peak current limiting

Internal leading-edge blanking

Internal slope compensation

Internal 4ms soft start (Fs = 65KHz)

Gate output voltage clamp

The GR8874 is a highly-integrated, low startup

current, current mode PWM controller with

green-mode function and high-voltage start up

circuit. A high-voltage current source supplies the

start up current and the traditional start-up resistor

can be saved in order to reduce the power

dissipation due to start-up resistor. The controller

also includes the leading-edge blanking of the

current sensing, internal slope compensation and

cycle-by-cycle peak current limiting. It is also

integrated soft driving for reducing EMI, gate output

voltage clamp function for protecting power

MOSFET. GR8874 provides several protections

such as OLP, OVP, and OCP for fault conditions.

The GR8874 improves the performance and

reduces the cost of power supplies. It is available in

both 8-pin SOP,7-pin SOP and 8-pin DIP package.

Soft driving for reducing EMI

Over-voltage protection (OVP) on Vcc pin

Over-load protection (OLP)

500mA driving capability

Ordering and Marking Information

DIP-8/SOP-8/SOP-7

GR8874

X X XXX

Grenergy OPTO Inc. reserves the right to make changes to improve reliability or manufacture ability without notice, and

advise customers to obtain the latest version of relevant information to verify before placing orders.

2010.10 Ver. 1.2 Copyright Grenergy OPTO, Inc. www.grenergy-ic.com

12 3 4 5 6 7...15

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