AM9800

Data Sheet Three Phase Direct PWM Sensorless Motor Driver AM9800 General Description The AM9800 is a direct PWM driver IC designed for three-phase brushless motors. Also, by using highly silent PWM drive, switching current of the phase with a smooth slope reduces the sound of slewing motor, and makes high-efficiency drive a reality by a synchronous commutation. The device is build-in lock protection. When the fan is locked, the device will enter the lockup protection mode. It is also equipped with thermal shutdown function and forward or reverse rotation selection. In normal operation, supply current is less than 2mA, but in PWM=0 mode it is just around 20µA. The AM9800 is available in SSOP-16 package. Features Speed Controllable by PWM Input Signal Sensorless Drive Soft Switched Drive Build-in Forward/Reverse Switching Circuit Power Saving Function in a Stopped State: 2mA and PWM=0 State: 20µA Build-in Current Limiter Circuit Build-in Lock Protection and Auto-restart Built-in Over Current Protection Built-in Thermal Shutdown Circuit ESD Rating: 4000V (Human Body Model) 300V (Machine Model) Applications CPU Cooler Fan in Notebook Personal Computers SSOP-16 Figure 1. Package Type of AM9800 Sep. 2012 Rev. 1. 0 BCD Semiconductor Manufacturing Limited 1 Three Phase Direct PWM Sensorless Motor Driver Pin Configuration GS Package (SSOP-16) 1 16 2 15 3 14 4 13 5 12 6 11 7 10 89 Data Sheet AM9800 Pin Description Figure 2. Pin Configuration of AM9800...