Datasheet > RT7789D

RT7789D

更新时间： 2024-09-25 15:50:03

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
1页	82K
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RT7789D 技术参数

Status：	Active	Feedback Regulation Mode：	SSR
Switching Frequency_Normal (kHz)：	65	Switching Frequency_Peak (kHz)：
Peak load Application：	No	HV Start-up：	Yes(w/i X-CAP discharge)
CCM/Valley Multi-mode：	Yes	Programmable Burst/Green-mode：	No
Brown-in/out：		OVP：	OVP
External OTP：	Yes	UVLO ON (V)：	18.0
UVLO OFF (V)：	6.5	VDD OVP (V)：	34.5
Features：	Current Mode Control;Cycle-by-Cycle Current Limit;OCP;OVP;SCP;UVP	Package Type：	SOP-8

RT7789D 数据手册

RT7789D

PowerZero^TMMulti-Mode Flyback Controller

General Description

Features

^Proprietary PowerZero^TMTechnology

^Integrating a 700V Start-up Device

^Brown-In/Brown-Out Protection

^Proprietary SmartJitter^TMTechnology

^Reducing EMI Emissions of SMPS

^Eliminating Frequency-Jittering-Induced Output

Ripple

The RT7789Dseries is an enhanced high-efficiency multi-

mode PWM flyback controller, incorporating Richtek's

proprietary PowerZero^TMand SmartJitter^TMtechnology. The

innovative PowerZero^TMtechnology, featuring an integrated

HV device, provides an excellent green power solution,

while the SmartJitter^TMtechnology can reduce EMI

emissions of a switch-mode power supply in green mode

as well as eliminate output ripple due to frequency jittering.

Also, the RT7789D series features a multi-mode control

scheme, operating from continuous-conduction mode

(CCM) to discontinuous-conduction mode (DCM) with

valley switching, to achieve high efficiency and optimal

performance.

^Operating in Continuous-Conduction Mode (CCM),

Discontinuous-Conduction Mode (DCM), and DCM

with Valley Switching

^Accurate Over-Current Protection (OCP)

^Programmable Line Compensation

 Programmable Output OVP and UVP

 Programmable External OTP

The RT7789Dis a current-mode PWM controller for flyback

converters. It integrates comprehensive and programmable

protection features, which include brown-in/brown-out

protection, VDDover-voltage protection (VDDOVP), output

over-voltage and under-voltage protection (Output OVPand

UVP), secondary rectifier short-circuit protection (SRSP),

and external over-temperature protection (External OTP).

For constant output power regulation, a resistor connected

to CS pin can be used to achieve accurate line

compensation across the universal input voltage range.

With the above features, the RT7789D enables a cost-

effective and compact design for a wide range of AC-DC

conversion applications. It is available in a SOP-8 package.

 Driver Capability : 300mA/−300mA

 High Noise Immunity

 RoHS Compliant and Halogen Free

Applications

 SwitchingAC-DCAdapter

 NBAdapter

 PrinterAdapter

Simplified Application Circuit

OUT

AC Mains

(90V to 265V)

Option

VDD

GATE

DMAG

RT7789D

COMP

GND

is a registered trademark of Richtek Technology Corporation.

DS7789D-02 November 2018

www.richtek.com

中文翻译

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与RT7789D相关器件

型号	品牌	获取价格	描述	数据表
RT7791AE	RICHTEK	获取价格	暂无描述
RT7791AEC	RICHTEK	获取价格	暂无描述
RT7791GE	RICHTEK	获取价格	暂无描述
RT7791LE	RICHTEK	获取价格	PWM Controller for Programmable Power Converter (USBPD)
RT7791PLB	RICHTEK	获取价格	PWM Controller for Programmable Power Converter (USBPD)
RT7791PLE	RICHTEK	获取价格	暂无描述
RT7791PLF	RICHTEK	获取价格	PWM Controller for Programmable Power Converter (USBPD)
RT7791PLS	RICHTEK	获取价格	PWM Controller for Programmable Power Converter (USBPD)
RT7800	RICHTEK	获取价格	暂无描述
RT7800B	RICHTEK	获取价格	暂无描述

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