pin assignment

AM7228 AM7228


1) Slope adjust mode for VH and VL pin control.
2) Soft switched drive.
3) PWM speed control.
4) Rotating speed pulse signal (FG) output.
5) Incorporating lock protection and automatic restart circuit.
6) Power Tr incorporated.
7) Hall Bias voltage built-in.
8) Soft start function built-in for reducing power up acoustic noise.


This is the summary of application for AM7228 optimum for driving 12V fan for general consumer
equipment. The most attractive function of AM7228 is slope adjust by external resistor, that can
meet most of fan request. This IC employs soft switching drive, Bi-CMOS process, and realizes
silent drive, low ON resistor, and low power consumption. This also incorporate lock protection
and auto restart circuit which does not require external capacitor.

Optimum for driving 12V fan for general consumer equipment

Data Sheet

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