G764 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – Fan Speed Controller with Linear or PWM Mode

Global Mixed-mode Technology
G764/G765
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 G765
„ G765 has Built-in Inverter for Crystal Oscilla-
tor
„ Internal 32kHz clock generator, +/- 3% accuracy
„ SOP-8/MSOP-8 for G764
„ MSOP-10 for G765
General Description
The G764/G765 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 sup-
plied 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 implemented to prevent damages to the fan and
the IC itself.
Applications
„ Notebook PC
„ Industrial PC
„ LAN Switch
„ Servers
„ Telecom equipment
„ Industrial Control
Pin Configuration
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G764P11U
G764 -55°C to +125°C SOP-8
G764P81U
G764 -55°C to +125°C MSOP-8
G765P71U
G765 -55°C to +125°C MSOP-10
Note: P1: SOP-8 P8: MSOP-8 P7:MSOP-10
1: Bonding Code
U: Tape & Reel
G764
FOUT 1
8 VCC
FG 2
7 SDA
ADD0 3
6 SCL
GND 4
5 CLK
SOP-8/MSOP-8
FOUT 1
FG 2
ADD0 3
ALERT# 4
GND 5
G765
10 VCC
9 SDA
8 SCL
7 X2
6 CLK
MSOP-10
Ver: 0.4
Nov 07, 2011
TEL: [phone]
http://www.gmt.com.tw
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