Diodes AM9789 - Manual

Data Sheet
Single Phase Full-wave Motor Driver for Silent Fan Motor AM9789
Oct. 2012 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
1
General Description
The AM9789 is a single-phase, full wave motor
driver suited for DC fan motor, and its speed is
controlled by PWM input signal. It is suitable for
both game machine and CPU cooler which need
silent drivers. It features lock protection, thermal
shutdown, PWM control, low noise and so on.
The AM9789 is available in MSOP-8, MSOP-10
DFN-3×3-8 and DFN-3×3-10 packages.
Features
• BTL Output Single-phase Full-wave Linear
Driver
• Silent Driver
• Low Supply Current (Normal Operation，Less
than 4mA)
• Low Standby Current (PWM=0 Duty) @
Supply Current Less than 200
µA
• Speed Controllable by PWM Input Signal
• Built-in Quick Start Function
• Built-in Lock Protection and Auto Restart
Function
• Built-in Hall Bias Circuit
• Built-in FG Output
• Built-in Thermal Shutdown Circuit
• Built-in Over Current Protection Circuit
Applications
•
Silent Fan Motors
Figure 1. Package Types of AM9789
MSOP-8 MSOP-10 DFN-3×3-8 DFN-3Ч3-10