AM9799 Datasheet, PDF (1/9 Pages) BCD Semiconductor Manufacturing Limited – Single Phase Full-wave Low Voltage Fan Motor Driver

Preliminary Datasheet
Single Phase Full-wave Low Voltage Fan Motor Driver
AM9799
General Description
The AM9799 is a single-phase DC brushless motor
driver IC featuring BiCMOS process. It is suitable for
fan motor drivers for low voltage equipment such as
the note personal computers. The AM9799 includes
lock shutdown, automatic restart, frequency generator
(FG), have been incorporated into one chip. When the
motor is under lock condition, lock shutdown
function turns off the output current. When the lock
condition is removed, the IC automatically restarts
and allows DC fan to run. In addition, the FG
function is to output rotation speed signal. It features
MOS-FET driver circuit for better saturation
characteristics. Slew late of amplifiers and feedback
resistors are optimized to achieve low-noise motor
operation.
The AM9799 is available in MSOP-8 package.
Features
• Lock Detection and Rotational Speed Sensing
Mechanisms are Built-in
• Rotor-locked Protection and Automatic Restart
When the Motor Lock is Undone
• Hall Bias Built-in and Hall Inputs Have a
Hysteresis
• Built-in Thermal Shutdown Circuit
• Built-in Over Current Protection
• Operating Voltage: V_CC=2V to 6V
• BiCMOS Technology
• Compact Package: MSOP-8
Applications
• CPU Cooler Fan in Notebook Personal
Computers
MSOP-8
Figure 1. Package Type of AM9799
Sep. 2009 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
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