Diodes AH5795 - Manual (Page 3)

AH5795
SINGLE PHASE HALL EFFECT LATCH SMART
FAN MOTOR CONTROLLER
AH5795
Document number: DS35277 Rev. 1 - 2
3 of 13
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August 2011
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Functional Block Diagram (Note 3)
Lock Detect,
Shutdown and
Automatic Re-Start
Soft
Switching
Control
Hall
Sensor
AMP
Vdd FG
O1
O2
Power
Vss
Logic
Block
Full Bridge
Driver
PWM
Frequency
Generator
Notes: 3. The AH5795 has an open-drain tachometer FG output that follows the magnetic change frequency. Typically a pull-up resistor of 10K Ω is
recommended from FG pin to the supply voltage.