Datasheet > RT8848D

RT8848D

更新时间： 2024-09-24 17:01:51

品牌	Logo	应用领域
立锜 - RICHTEK		多相元件
页数	文件大小	规格书
88页	2004K
描述
Multi-Phase PWM Controller with PWM-VID Reference

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RT8848D 数据手册

RT8848D

Multi-Phase PWM Controller with PWM-VID Reference

General Description

Features

 Multi-Phase PWM Controller

The RT8848D is

synchronous Buck controller which is optimized for

high-performance graphic microprocessor and

8/7/6/5/4/3/2/1 multi-phase

 PWM-VID Dynamic Voltage Control

 Support 1.8V PWM-VID Interface

 Power State Indicator

supports nVidia OVR4i+ spec with PWM-VID interface.

The RT8848D adopts AC G-NAVP^TM(Green Native

AVP), which is Richtek's proprietary topology derived

from finite DC gain of internal GM amplifier with current

mode control. By utilizing the AC G-NAVP^TMtopology,

the operating frequency of the RT8848D varies with

VID, load and input voltage to further enhance the

efficiency even in CCM. Besides, for current sensing

application, the RT8848D can support either a

traditional DCR network current sensing from inductor

or a smart power stage (SPS) which can directly

provide a current monitor signal (IMON).

 LPC (Low Phase Count), PSI = Low

 APS (Auto Phase Shedding), PSI = Mid

 HPC (High Phase Count), PSI = High

 External Reference Input Control

 8/7/6/5/4/3/2/1 Phase Hardware Setting

 Adjustable Soft-Start Time

 Adjustable Switching Frequency

 Adjustable Phase Current Balance

 Support Standby Mode

 UVP/OVP/OTP/SOC/CH_OC/TSEN Protection

 Adjustable Protection Thresholds

 Power Good Indicator

The RT8848D features external reference input and

PWM-VID dynamic output voltage control, in which the

output voltage is regulated and tracks external input

reference voltage. The RT8848D can set internal

RAMP amplitude through PINSETx pin and this can

optimize stability and load transient performance. The

RT8848D also provides complete fault protection

functions including over-voltage protection (OVP),

under-voltage protection (UVP), channel over-current

limit (CH_OC), sum output current protection (SOC)

and over-temperature protection (OTP). The

recommended junction temperature is 40C to 125C.

 ADC Reporting for IMON, TSEN and VSEN

 Support I²C Interface for Programming

 RoHS Compliant and Halogen Free

Applications

 GPU Core Power for OVR4i+ Spec

Simplified Application Circuit

RT8848D

DrMOS

OUT

VCC

PWM1

ISEN1

PWM

IMON

VIN

VSW

VIN

DrMOS

PGOOD

PWM

IMON

VIN

PWM2

ISEN2

VSW

PSI

IMON

CH_OC

PWMVID

SDA

SCL

TSEN

REFIN

PINSET1

VCC

DrMOS

PWM8

ISEN8

PWM

IMON

VIN

PINSET2

PINSET3

VSW

VCC

VSEN

OUT_SNS

GND

FBRTN

GND_SNS

is a registered trademark of Richtek Technology Corporation.

DS8848D-01

December 2023

www.richtek.com

12 3 4 5 6 7...88

中文翻译

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