CHL8318CRT International Rectifier, CHL8318CRT Datasheet

CHL8318CRT

Manufacturer Part Number

CHL8318CRT

Description

8 phase VR11.1 multiphase PWM controller for high efficiency solutions

Manufacturer

International Rectifier

Datasheet

1.CHL8318CRT.pdf (4 pages)

Specifications of CHL8318CRT

Controller

CPU

Overclocking

Yes

Auto-psi/dpc

Yes

Vgd

Yes

Voltage Outputs (#)

Phases (#)

Typical Configuration

8 Multiphase

I2c

Smbus

Yes

Pmbus

Package

QFN 8 x 8

Current page: 1 of 4
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Trademarks and registered trademarks are the property of the respective

owners.

PB0006 Rev. 1.00, October 26, 2009

FEATURES



GAMER_OFF

Intel VR11.x compliant Digital PWM Controller

Programmable 1-phase to 8-phase operation

Configurable switching frequency from 200 kHz to

1MHz per phase with accuracy better than 2%

Customized Digital Over-Clocking Features

CHiL Efficiency Shaping Features

1-phase to 4-phase PSI for Light Loads

Adaptive Transient Algorithm minimizes output bulk

capacitors

Designed for use with coupled inductors

Enables Thermal Phase Balancing

SMBus Fault Indicators: OVP, UVP, OCP, OTP

SMBus interface for configuring and monitoring; SMBus

commands include monitoring input current and power

Compatible with CHiL ATL Drivers and tri-state Drivers

Nine bytes of NVM storage available for customer use

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

RoHS Compliant, MSL level 1 package

VINSEN

TSEN1

TSEN2

TSEN3

SADDR/

RCSM

RCSP

VCPU

RRES

VRTN

IMON

V18A

VCC

Figure 1. CHL8318 56 Pin QFN Package

Easy-to-use SMBus Gamer command

Gamer VID control up to 2.3V, Gamer Vmax,

VID Override or Track, Digital Load-Line Adjust,

Gamer OC/OVP, Gamer OFF pin, Gamer OTP

Variable Gate Drive

Dynamic Phase Control

8mmx8mm

TOP VIEW

CHL8318

56 Pin

CHiL

GND

QFN

48 47 46 45

44 43

PRODUCT BRIEF

DIGITAL MULTI-PHASE BUCK CONTROLLER

IRTN8

ISEN8

VCC

PWM8

PWM7

PWM6

PWM5

PWM4

PWM3

PWM2

PWM1

VCC

VAR_GATE

Page 1 of 4

DESCRIPTION

The CHL8318 is a 8-phase digital synchronous buck

controller for core regulation of high-performance INTEL

VR11.1 and VR11.0 platforms. The CHL8318 is fully

compliant with VR11.1 including Power Status Indicator

(PSI) and for improved light load efficiency and accurate

current output (IMON).

The CHiL CHL8318 includes a customized set of digital

over-clocking features which require no external

components. Gaming applications can use the SMBus

interface to place the VRD into “Gamer Mode”. Gamer Mode

features include Extended Gamer VID up to 2.3V with 6.25

mV resolution, Gamer Vmax, CPU VID Override or Track,

Digital Load-Line adjust, Gamer OC/OVP and Gamer OFF

pin.

The CHL8318 deploys a number of efficiency shaping

features. The CHL8318 can be configured to optimize

MOSFET gate drive versus load current, PSI can be

programmed to be up to four phases for optimum light-load

efficiency, and the controller can autonomously add/drop

phases in low-current and mid-current regions to deliver

90+% efficiency across the entire load range.

CHiL’s unique Adaptive Transient Algorithm, based on non-

linear digital PWM algorithms, minimizes output bulk

capacitors. Coupled inductor mode of operation allows two

phase PSI and add/drop of phases which are 180°out of

phase for further improvement in transient response and

form factor.

CHL8318 supports three NTC temperature sensors to report

temperature and trigger VR HOT and OTP faults. Digital

thermal balancing allows proportional current imbalance

between phases.

The CHL8318 provides extensive OVP, UVP, OCP and OTP

fault protection. Device and fault configuration parameters

are easily defined using the CHiL Intuitive Power Designer

(IPD) GUI and stored in on-chip non-volatile memory (NVM).

The 3-pin SMBus interface can be used to monitor a variety

of operating parameters on up to seven CHL8318 based

VRs. The controller includes a unique sensorless and

lossless input current monitoring capability.

The CHL8318 truly simplifies VRD design and enables

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

APPLICATIONS



Intel® VR11.x CPU VRD and VRM; DDR Memory

High Performance Desktops and Servers

Over-clocking and High-Efficiency Applications

One Highwood Drive, Tewksbury, MA 01876

CHL8318

Tel: +1(978)-640-0011

www.chilsemi.com

Related parts for CHL8318CRT

CHL8318CRT Summary of contents

Page 1

FEATURES  Intel VR11.x compliant Digital PWM Controller  Programmable 1-phase to 8-phase operation  Configurable switching frequency from 200 kHz to 1MHz per phase with accuracy better than 2%  Customized Digital Over-Clocking Features o Easy-to-use SMBus Gamer command ...

Page 2

FUNCTIONAL BLOCK DIAGRAM VID0 VID1 VID2 VID3 VID decode and DAC VID4 VID5 VID6 VID7 VCPU VRTN ISEN1 IRTN1 ISEN2 IRTN2 ISEN3 IRTN3 ISEN4 IRTN4 Channel Current Sense ISEN5 IRTN5 ISEN6 IRTN6 ISEN7 IRTN7 ISEN8 IRTN8 RCSP RCSM TSEN1 TSEN2 ...

Page 3

TYPICAL APPLICATIONS R series series +3.3V To CPU R_IMON VRTN +12V R VIN_1 R VIN_2 From System +3.3V To CPU Figure 3. 8-phase VRD using CHL8318 Controller and CHL8510 MOSFET drivers ...

Page 4

... ORDERING INFORMATION CHL8318    T: Tape & Reel Package type R : QFN Operating Temperature Range C: Commercial Standard PACKAGE INFORMATION PRODUCT BRIEF DIGITAL MULTI-PHASE BUCK CONTROLLER Package Tape & Reel Qty QFN 3000 Page CHL8318 Part Number CHL8318CRT PB0006 Rev. 1.00, October 26, 2009 ...

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