CHL8112B-00CRT International Rectifier, CHL8112B-00CRT Datasheet

CHL8112B-00CRT

Manufacturer Part Number

CHL8112B-00CRT

Description

Dual Loop, 4+1 multiphase AMD PWM controller for high efficiency, highly accurate VR solutions

Manufacturer

International Rectifier

Datasheet

1.CHL8112B-00CRT.pdf (2 pages)

Specifications of CHL8112B-00CRT

Controller

CPU

Overclocking

Yes

Auto-psi/dpc

Yes

Vgd

Yes

Voltage Outputs (#)

Phases (#)

Typical Configuration

4 + 1 Multiphase

I2c

Yes

Smbus

Yes

Pmbus

Yes

Package

QFN 6 x 6

Current page: 1 of 2
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Trademarks and registered trademarks are the property of the respective

owners.

PB0012 Rev. 0.04, August 25, 2010

FEATURES

DESCRIPTION

The CHL8112A/B are dual-loop digital multi-phase buck

controllers that drive up to 5 phases. The CHL8112A/B is

fully AMD® SVI compliant on both loops and provides a Vtt

tracking function for DDR memory.

NVM storage saves pins and enables a small package size.

The CHL8112A/B includes the CHiL Efficiency Shaping

Technology to deliver exceptional efficiency at minimum

cost across the entire load range. CHiL Variable Gate Drive

optimizes the MOSFET gate drive voltage as a function of

real-time load current. CHiL Dynamic Phase Control

adds/drops active phases based upon load current. The

CHL8112A/B can be configured to enter 1-phase operation

and active diode emulation mode automatically or by

command.

CHiL’s unique Adaptive Transient Algorithm (ATA), based

on proprietary non-linear digital PWM algorithms, minimizes

output bulk capacitors. In addition, a coupled inductor mode,

with phases added/dropped in pairs, enables further

improvement in transient response and form factor.

5-phase dual output PWM Controller

Phases are flexibly assigned between Loops 1 & 2

AMD® SVI/G34 & Memory MPoL modes

Dual OCP support for I-spike enhanced AMD CPUs

SMB_Alert Pin for Servers

PMBus Address pin or Variable Gate Drive (CHL8112A)

2nd Temperature Sense (CHL8112B)

Overclocking & Gaming Mode with Vmax setting

Switching frequency from 200kHz to 1.2MHz per phase

CHiL Efficiency Shaping Features including Variable

Gate Drive (CHL8112A only), Dynamic Phase Control

Programmable 1-phase or 2-phase for Light Loads and

Active Diode Emulation for Very Light Loads

CHiL Adaptive Transient Algorithm (ATA) on both loops

minimizes output bulk capacitors and system cost

Designed for use with coupled inductors

Auto-Phase Detection with auto-compensation

Per-Loop Fault Protection: OVP, UVP, OCP, OTP, CFP

I2C/SMBus/PMBus system interface for telemetry of

Temperature, Voltage, Current & Power for both loops

Non-Volatile Memory (NVM) for custom configuration

Compatible with CHiL ATL and 3.3V tri-state Drivers

+3.3V supply voltage; 0ºC to 85ºC ambient operation

Pb-Free, RoHS, 6x6 40 pin QFN package

PRODUCT BRIEF

DIGITAL MULTI-PHASE BUCK CONTROLLER

Page 1 of 2

VR_READY_L2

VR_READY

The I2C/PMBus interface can communicate with up to 16

CHL8112A/B based VR loops. Device configuration and

fault parameters are easily defined using the CHiL Intuitive

Power Designer (IPD) GUI and stored in on-chip NVM.

The CHL8112A/B provides extensive OVP, UVP, OCP and

OTP fault protection and includes thermistor based

temperature sensing with VRHOT signal.

The CHL8112A/B also includes numerous features like

differentiation, truly simplifying VRD design and enabling

fastest time-to-market with its “set-and-forget” methodology.

APPLICATIONS

/ PWROK

PWRGD

RCSM

RCSP

VSEN

VRTN

RRES

TSEN

V18A

VCC

AMD® SVI based systems

DDR Memory with Vtt tracking

Overclocked & Gaming platforms

PRELIMINARY

Figure 1. CHL8112A & CHL8112B Packages

Notes

Pin definition in MPoL mode

Pin definition in AMD mode

40 Pin 6x6 QFN

CHL8112A/B

Top View

One Highwood Drive, Tewksbury, MA 01876

CHL8112A/B

41 GND

Tel: +1(978)-640-0011

www.chilsemi.com

RCSP_L2

RCSM_L2

VCC

VSEN_L2

VRTN_L2

PWM5

PWM4

PWM3

PWM2

PWM1

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CHL8112B-00CRT Summary of contents

Page 1

... RRES 7 TSEN 8 V18A 1 VR_READY / 9 2 PWRGD 1 VR_READY_L2 PWROK 11 Figure 1. CHL8112A & CHL8112B Packages APPLICATIONS AMD® SVI based systems DDR Memory with Vtt tracking Overclocked & Gaming platforms Page CHL8112A CHL8112A/B 40 Pin 6x6 QFN Top View ...

Page 2

... LVCC L PWM LoGate GND CHL8510 Boot HiGate Vcc HVCC Switch LVCC V_VGD PWM LoGate GND Optional Variable Gate Drive Circuit Tape & Reel Qty Part Number 3000 CHL8112A-00CRT 3000 CHL8112A-xxCRT 3000 CHL8112B-00CRT 3000 CHL8112B-xxCRT Rev. 0.04, August 25, 2010 PB0012 ...

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