CHL8316 – 6 Phase Digital PWM Controller with SMBus

CHL8316 Preliminary Product Brief (pdf)

CHL8316 Preliminary Product Datasheet (pdf) registered users only

FEATURES

• Intel VR11.1, VR11.0 compliant Digital PWM controller with SMBus interface
• Digital closed loop feedback requires no external components

Parametric Data

	Min	Max
Vbias	3.1V	3.5V
Vout	0.5V	2.3V
Fsw	200kHz	1MHz
Iout		>200A

• Selectable from 1 to 6 phase operation
• Switching frequency configurable from 200kHz to 1MHz
  • Accuracy better than 5% & Ultra low jitter
• Customized Digital over-clocking features
  • SMBus Gamer command
  • Gamer VID to 2.3V, VID override or track, digital load line adjust
  • Gamer OCP, OVP, OTP, OFF
• CHiL Efficiency shaping features from light load to full load
  • Dynamic Phase Control - 3 programmable regions
  • Variable Gate Drive - gate voltage proportional to output current
• Current & thermal balancing for each phase

• SMBus fault indicators: OVP, UVP, OCP, OTP
• SMBus interface for configuring and monitoring current & power
• 1Φ or 2Φ PSI feature improves light load efficiency
• Load Line configurable from 0.6mΩ to 1.4mΩ
• Compatabile with CHiL ATL & tri-state MOSFET drivers
• QFN, lead-free RoHS compliant package 

DESCRIPTION

The CHL8316 is a 6-phase digital multiphase synchronous buck controller with SMBus interface, compliant with Intel VR11.x specifications. It is designed for use in DC-DC converters to power CPU, GPU and memory loads. It  supports the PSI and IMON features of VR11.1.

The CHL8316 includes customized Digitial Over-clocking features, requiring no external components. Its SMBus interface can enable Gamer Mode with extended Gamer VID up to 2.3V, digital load line adjust, and Gamer OVP, OCP etc.

The CHL8316 deploys unique efficiency shaping features to maintain a flat 90%+ efficient VR across the entire load range.

DPC (Dynamic Phase Control) allows autonomous phase add and drop.

VGD (Variable Gate Drive) optmizes the MOSFET gate drive based on the load current demand.

The unique digital non-linear PWM control - ATA (Adaptive Transient Algorithm), uses configuration parameters stored in the internal Non Volatile Memory (NVM) to deliver unmatched fast transient response and accurate steady state behavior for optimized VR component selection and BOM.

The CHL8316 includes additional features like thermal phase balancing, temperature sense and OTP fault trigger, digital steady state and transient balancing of phase currents and extensive fault configuration and monitoring capability.

Design and debug is greatly simplified by use of the CHiL IPD (Intuitive power Designer) GUI to easily access the registers during for a “set and forget” approach.

APPLICATIONS

Typical Application

• Intel® VR11.x CPU VRD and VRM
• Overclocking and high efficiency VRs
• High efficiency and compact VRM

DESIGN TOOLS

CHiL IPD - The IPD (Intuitive power Designer) is a graphical user interface (GUI) used to assist in multiphase VR designs using the CHL8316 controller. It is a comprehensive tool that encompasses the three key elements of bringing an easy digital VRD design to production: Design, Configuration and Monitoring.

Device Layout Symbol - Library files for device layout in Cadence® Allegro® version 15 format

RELATED DEVICES

• CHL8500 - Synchronous Buck MOSFET Driver with CHiL ATL (Active Tri Level) PWM signal for phase shedding
• CHL8510 - 6A Synchronous Buck MOSFET Driver with unique CHiL ATL (Active Tri Level) PWM signal for phase shedding

ORDERING INFORMATION

Part #	Status	Temp (ºC)	Package/ Pins	Standard quantity	RoHS Compliance
CHL8316CRT	Active	Commercial	QFN / 48	Tape & reel, 3000	Y