ver: 0.2 feb 11, 2010 tel: 886-3-5788833 http://www.gmt.com.tw 1 G762/g763 global mixed-mode technology inc. 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 g763 ? g763 has built-in inverter for crystal oscilla- tor ? sop-8/msop-8 for G762 ? msop-10 for g763 applications ? notebook pc ? industrial pc ? lan switch ? servers ? telecom equipment ? industrial control general description the G762/g763 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. ordering information order number marking temp. range package (green) G762p11u g 762 -55 c to +125 c sop-8 G762p81u g 762 -55 c to +125 c msop-8 g763p71u g 763 -55 c to +125 c msop-10 note: p1: sop-8 p8: msop-8 p7:msop-10 1: bonding code u: tape & reel pin configuration add0 8 6 5 1 2 3 4 fout fg gnd vcc sda scl clk sop-8/msop-8 G762 7 add0 10 8 7 1 2 3 4 fout fg alert# vcc sda scl x2 msop-10 g763 9 6 5 gnd clk add0 8 6 5 1 2 3 4 fout fg gnd vcc sda scl clk sop-8/msop-8 G762 7 add0 10 8 7 1 2 3 4 fout fg alert# vcc sda scl x2 msop-10 g763 9 6 5 gnd clk
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