TYPICAL PERFORMANCE
BC10/BC20
I/O
SIGNAL
DESCRIPTION
PIN
I
I
O
O
O
I/O
I/O
I/O
I
I
I
I
I
I
I
I
I
I
O
O
O
HV
HVRTN
OUT1
OUT2
OUT3
S1
S2
S3
HS1
HS2
HS3
120
REV
GROUND
Vcc
REF IN
FB
TORQUE
MOTOR I
SSC
FAULT
Unregulated high current motor supply voltage
Return line for the high motor current
Half bridge output for driving motor coil
Half bridge output for driving motor coil
Half bridge output for driving motor coil
Source of the N-rail FET in half bridge 1
Source of the N-rail FET in half bridge 2
Source of the N-rail FET in half bridge 3
Commutation sensor input 1
Commutation sensor input 2
Commutation sensor input 3
Sets commutation logic for 120 0 phasing
Reverses direction when 2 quadrant PWM is used
Signal ground
Control circuit power
Velocity/speed input
Input for analog voltage proportional to velocity or speed
Input for an analog voltage proportional to motor current
Analog voltage proportional to motor current
HCMOS level pulse for each sensor state change.
HCMOS logic level output, a 0 indicates over temperature
or over current condition.
HCMOS 1 enables power FET operation
The PWM frequency may be lowered by installing a
capacitor between this output and ground.
A logic 1 on this input enables 2 quadrant PWM
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I
I/O
OE
CT
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I
2Q
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PIN FUNCTION
BC10/BC20U REV. 1 MAY 1999
1999 Apex Microtechnology Corp.
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