G761 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – Fan Speed Controller with Linear or PWM Mode

Global Mixed-mode Technology
G761
Fan Speed Controller with Linear or PWM Mode
Features
„ SMBus Interface
„ Linear or PWM Mode Speed Control
„ Open or Close Loop Fan Speed Control
„ Supply Voltage Range 3V~5.5V
„ ADD0 Pin to Select 3 Different SMBus Addresses
„ SMBus Alert # for G761
„ G761 has Built-in Inverter for Crystal Oscilla-
tor
„ Internal 32kHz clock generator, +/- 1% accuracy
„ MSOP-10 for G761
Applications
„ Notebook PC
„ Industrial PC
„ LAN Switch
„ Servers
„ Telecom equipment
„ Industrial Control
General Description
The G761 is a single chip solution for fan speed
control. It can be directly connected to the fan and
performs close-loop or open-loop control. And there
are two modes, PWM and linear, to drive the fan. It
determined the current fan speed based on the fan
rotation pulses and an externally supplied clock.
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 im-
plemented to prevent damages to the fan and the
IC itself.
Ordering Information
ORDER
NUMBER
MARKING
G761P71U
G761
Note: P7:MSOP-10
1: Bonding Code
U: Tape & Reel
TEMP.
RANGE
-55°C to +125°C
PACKAGE
(Green)
MSOP-10
Pin Configuration
FOUT 1
FG 2
ADD0 3
ALERT# 4
GND 5
G761
10 VCC
9 SDA
8 SCL
7 X2
6 CLK
MSOP-10
Ver: 0.3
May 16, 2012
TEL: [phone]
http://www.gmt.com.tw
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