CHL8225-02CRT

PRODUCT BRIEF CHL8225/CHL8228 DIGITAL MULTI-PHASE BUCK CONTROLLER parameters are easily defined using the CHiL Intuitive Power Designer (IPD) GUI and stored in on-chip NVM. FEATURES ISEN4 IRTN5 ISEN5 3 28 VCC VSEN 4 27 VSEN_L2 VRTN 5 26 VRTN_L2 RRES 6 25 PWM5 TSEN 7 24 PWM4 V18A 8 23 PWM3 VR_READY 9 22 PWM2 VR_READY_L2 10 21 PWM1 CHL8225 40 Pin 6x6 QFN Top View 41 GND 16 17 18 19 20 IRTN5 ISEN5 IRTN6 ISEN6 IRTN7 SMB_CLK 15 VAR_GATE 14 56 55 54 53 52 51 50 49 48 47 46 45 44 43 ISEN8 1 42 ISEN7 RCSP 2 41 RCSP_L2 RCSM 3 40 RCSM_L2 VCC 4 39 VCC VRHOT2 5 38 VSEN_L2 VSEN 6 37 VRTN_L2 VRTN 7 36 PWM8 RRES 8 35 PWM7 TSEN 9 34 PWM6 V18A 10 33 PWM5 VR_READY 11 32 PWM4 VR_READY_L2 12 31 PWM3 EN_L2 13 30 PWM2 VINSEN 14 29 PWM1 The CHL8225/8 NVM saves pins and enables a small package size. The CHL8225/8 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 and drops phases based upon load current. The CHL8225/8 can be configured to enter 1-phase operation and active diode emulation mode based upon load current or by command. 13 ISEN4 The CHL8225/8 are dual-loop digital multi-phase buck controllers. The CHL8225 drives up to 5 phases and the CHL8228 drives up to 8 phases. They feature Input Voltage Management allowing up to 3 input voltages to be monitored to ensure adequate power is delivered to the load. Dynamic voltage control is provided by 4 registers which are programmed through I2C/SMBus/PMBus and then selected using a 2-bit parallel bus for fast access. 12 SMB_DIO 11 DESCRIPTION CHL8228 56 Pin 8x8 QFN Top View 18 19 20 21 22 23 24 25 26 27 28 VMAX TSEN2 VAR_GATE 17 VBOOT 16 SMB_CLK 15 SMB_DIO 57 GND 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. Figure 1: CHL8225 & CHL8228 Packages APPLICATIONS The I2C/PMBus interface can communicate with up to 16 CHL8225/8 based VR loops. Device configuration and fault Trademarks and registered trademarks are the property of the respective owners. PB0008, Rev 1.0, June 11, 2010 IRTN4 RCSM_L2 VCC ENABLE Pb-Free, RoHS, 6x6 40pin & 8x8 56pin QFN packages ISEN3 RCSP_L2 29 IRTN4  IRTN3 30 2 VIDSEL1_L2 +3.3V supply voltage; 0ºC to 85ºC ambient operation ISEN2 1 VRHOT_ICRIT#  31 RCSP Non-Volatile Memory (NVM) for custom configuration Compatible with CHiL ATL and 3.3V tri-state Drivers 32 RCSM I2C/SMBus/PMBus system interface for telemetry of Temperature, Voltage, Current & Power for both loops  33 ISEN3  34 VINSEN  35 ENABLE Per-Loop Fault Protection: OVP, UVP, OCP, OTP 36 VIDSEL0  37 IRTN3 Designed for use with coupled inductors 38 VRHOT_ICRIT#  IRTN2 CHiL Adaptive Transient Algorithm (ATA) minimizes output bulk capacitors and system cost 39 VIDSEL1  40 ISEN2 Programmable 1-phase or 2-phase for Light Loads and Active Diode Emulation for Very Light Loads VIDSEL0  ISEN1 CHiL Efficiency Shaping Features including Variable Gate Drive, Dynamic Phase Control VIDSEL_L2  IRTN2 Phase Switching frequency from 200kHz to 1.2MHz VIDSEL1  The CHL8225/8 includes numerous features like register diagnostics for fast design cycles and platform differentiation, simplifying VRD design and enabling fastest time-to-market with its “set-and-forget” methodology. IRTN1 ICRITICAL Monitor and Phase Current Capture Mode VINSEN_AUX1  ISEN1 Input Voltage Management for up to 3 Input Voltages IRTN1  The CHL8225/8 provides extensive OVP, UVP, OCP and OTP fault protection and includes thermistor based temperature sensing with VRHOT signal. VIDSEL0_L2 Dynamic voltage control by 2-bit parallel interface with Gamer Mode override and Vmax setting IRTN8  VINSEN_AUX2 5-phase & 8-phase dual output PWM Controller with phases flexibly assigned between Loops 1 & 2 VINSEN_AUX1   - 1- Multiphase GPU systems One Highwood Drive, Tewksbury, MA 01876 Tel: +1(978) 640-0011 www.chilsemi.com © 2010 CHiL Semiconductor Corp. All rights reserved CHL8225/CHL8228 DIGITAL MULTI-PHASE BUCK CONTROLLER RCS CCS PWM1 Rseries RCSM Boot CHL8510 HiGate Vcc HVCC Switch LVCC PWM LoGate GND Mode V_GPU_L1 L O A D ISEN1 VCC VSEN VRTN RRES V_VGD V 12V V IRTN1 +3.3V 12V V RTh V_VGD V 12V RCSP Rseries V TYPICAL APPLICATIONS BLOCK DIAGRAM PWM 2 Boot CHL8510 HiGate Vcc HVCC Switch LVCC PWM LoGate GND Mode ISEN2 IRTN2 TSEN RTh2 V_VGD V TSEN2 RTh2 12V V CHL8225/8 V18A PWM3 Boot CHL8510 HiGate Vcc HVCC Switch LVCC PWM LoGate GND Mode ISEN3 VR_RDY_L1 VR_RDY_L2 +12V Main IRTN3 RVIN_1 V_VGD RVIN_2 V VINSEN +12V Aux 1 RVIN_1 VINSEN_AUX_1 +12V Aux 2 RVIN_2 PWM4 Boot CHL8510 HiGate Vcc HVCC Switch LVCC PWM LoGate GND Mode ISEN4 IRTN4 RVIN_1 VINSEN_AUX_21 V 1 VIDSEL1_L2 V RVIN_2 VIDSEL0_L21 GPU I/O V V VIDSEL1 VIDSEL0 PWM5 ISEN5 IRTN5 PWM61 Unused phases ISEN61 VR_HOT_ICRIT# VR_HOT2 ISEN71 V SMB_DIO SMB_CLK VMAX 12V 1 V_VGD V IRTN71 V V EN_L21 V I2C or SMBus PWM71 EN V From System IRTN61 VBOOT1 PWM81 L O A D IRTN81 Rseries RCS V_GPU_L2 ISEN81 RCSP_L2 RTh Boot CHL8510 HiGate Vcc HVCC Switch LVCC PWM LoGate GND Mode CCS Rseries 12V Boot CHL8510 HiGate Vcc HVCC Switch LVCC PWM LoGate GND Mode VSEN_L2 Notes 1 CHL8228 only VAR_GATE VRTN_L2 V RCSM_L2 GND V_VGD Optional Variable Gate Drive Circuit ORDERING INFORMATION CHL822  -      Package QFN QFN QFN QFN T: Tape & Reel Package type R : QFN Operating Temperature C: Commercial Standard Range xx: Configuration file R : QFN Tape & Reel Qty 3000 3000 3000 3000 Part Number 1 CHL8225-00CRT 2 CHL8225-xxCRT 1 CHL8228-00CRT 2 CHL8228-xxCRT Notes 1 For unprogrammed/default parts, use configuration file 00. Unprogrammed parts will not start up until programmed in order to insure a safe power up. 2 -xx indicates a customer specific configuration file. Part 5: CHL8225 8: CHL8228 - 2- PB0008 Rev 1.0, June 11, 2010