General Description

G760 is a single chip solution for fan speed control, packaged in a space saving SO-8 package. It connects directly to the fan and performs closed-loop control of the fan speed. The only external component required is a 10µF capacitor. It determined the current fan speed based on the fan rotation pulses and an externally supplied clock. It uses pulse width modulation (PWM) method and an on-chip MOSFET to control the fan speed to ±2 of the programmed speed. The desired fan speed is programmed via the SMBus. The actual fan speed and fan status can be read via the SMBus. Short-circuit protection is implemented to prevent damages to the fan and this IC itself. An On/Off control pin is also provided.

Features

■ Constant Fan Speed Control

■ PWM control for stable operation

■ Build-in MOSFET switch

■ SMBus interface

■ Internal short-circuit protection

■ On/Off control provided

Applications

■ Notebook PC

■ Industrial PC

■ LAN Switch

■ Servers

■ Telecom equipment

■ Industrial Control