CHL8318-20-00CRT International Rectifier, CHL8318-20-00CRT Datasheet
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CHL8318-20-00CRT
Manufacturer Part Number
CHL8318-20-00CRT
Description
8 phase VR11.1 low temperature multiphase PWM controller for high efficiency solutions
Manufacturer
International Rectifier
Datasheet
1.CHL8318-20-00CRT.pdf
(2 pages)
Specifications of CHL8318-20-00CRT
Controller
CPU
Overclocking
Yes
Auto-psi/dpc
Yes
Vgd
Yes
Voltage Outputs (#)
1
Phases (#)
8
Typical Configuration
8 Multiphase
I2c
-
Smbus
Yes
Pmbus
-
Package
QFN 8 x 8
FEATURES
APPLICATIONS
BASIC APPLICATION
Intel VR11.x compliant Digital PWM Controller
Programmable 1-phase to 8-phase operation
Customized Digital Over-Clocking features an
IR Efficiency Shaping features a Variable Gate Drive
1-phase to 4-phase PSI for Light Loads
Adaptive Transient Algorithm minimizes capacitors
Designed for use with coupled inductors
Enables Thermal Phase Balancing
SMBus Fault Indicators: OVP, UVP, OCP, OTP
SMBus interface for configuring and monitoring;
Compatible with IR ATL Drivers and tri-state Drivers
9 bytes of NVM storage available for customer use
+3.3V supply voltage; 0ºC to 85ºC Ambient
RoHS Compliant, MSL level 1 package
Intel® VR11.x CPU VRD and VRM; DDR Memory
High Performance Desktops and Servers
Over-clocking and High-Efficiency Application
easy-to-use SMBus Gamer command and a
Gamer VID control up to 2.3V, Gamer Vmax,
VID Override or Track, Digital Load-Line Adjust,
Gamer OC/OVP, Gamer OFF pin and Gamer OTP
and Dynamic Phase Control
SMBus commands include monitoring input
current and power
operation
Figure 1: CHL8318-20 Basic Application Circuit
1
September28, 2011 | FINAL | V1.02
Digital Multi-Phase Buck Controller
DESCRIPTION
The CHL8318-20 is an 8-phase digital synchronous buck
controller for core regulation of high-performance Intel
VR11.1 and VR11.0 platforms. The CHL8318-20 is fully
compliant with VR11.1 including Power Status Indicator
(PSI) and for improved light load efficiency and accurate
current output (IMON).
The IR CHL8318-20 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” to extend
VID up to 2.3V with 6.25 mV resolution.
The CHL8318-20 deploys a number of efficiency shaping
features such as variable MOSFET gate drive versus load,
programmable PSI modes for optimum light-load along
with programmable phase shedding to autonomously
add/drop phases versus load.
CHL8318-20 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 CHL8318-20 provides extensive OVP, UVP, OCP and
OTP fault protection. Device and fault configuration
parameters are easily defined using the IR Power Designer
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 CHL8318-20 based
VRs. The controller includes a unique sensorless and
lossless input current monitoring capability.
PIN DIAGRAM
GAMER_OFF
VINSEN
TSEN1
TSEN2
TSEN3
SADDR/
RCSM
RCSP
VCPU
RRES
Figure 2: CHL8318-20 Package Top View
VRTN
IMON
V18A
VCC
EN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CHL8318-20
8mmx8mm
TOP VIEW
56 Pin
GND
QFN
48 47 46 45
CHL8318-20
44 43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
IRTN8
ISEN8
VCC
PWM8
PWM7
PWM6
PWM5
PWM4
PWM3
PWM2
PWM1
NC
VCC
VAR_GATE
®
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CHL8318-20-00CRT Summary of contents
Page 1
... VR11.1 including Power Status Indicator (PSI) and for improved light load efficiency and accurate current output (IMON). The IR CHL8318-20 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” to extend VID ...
Page 2
... CHL8318- Pin 7 8mmx8mm QFN 8 TOP VIEW 9 10 GND Figure 3: CHL8318-20 Top View Enlarged CHL8318-20 Tape & Reel Qty Part Number 3000 CHL8318-20-00CRT 3000 CHL8318-20-xxCRT IRTN8 41 ISEN8 40 VCC 39 PWM8 38 PWM7 37 PWM6 36 PWM5 35 PWM4 34 PWM3 33 PWM2 ...