LB11983 Datasheet, PDF (5/7 Pages) Sanyo Semicon Device – For Fan Motor Driver for Refrigerator 3-Phase Sensorless Motor Driver

LB11983
Pin Functions
Pin No. Pin name
20
UOUT
1
VOUT
2
WOUT
19
RF
Function
Drum motor driver output pin.
Minimum potential of the drum motor driver output
transistor. This voltage is detected for
constantcurrent control.
The current limiter is also activated upon detection
of this potential.
Equivalent circuit
VCC
3.9Ω
30kΩ
3.9Ω
30kΩ
19
10kΩ
20μA
20
5
1
6
2
7
4
VCC
Power supply pin. (8 to 13.8V)
3
MCOM
Middle point input pin of motor coil. The coil
waveform is detected with reference to this
voltage.
VCC
20 1 2
5
UIN
Input pin of the coil waveform detection
5
comparator. Connected to each phase output with
6
a built-in resistor of 10kΩ
7
6
VIN
10kΩ
200Ω
200Ω
3
200Ω
7
WIN
8
C1
Triangular wave generating capacitor connection
pin. This triangsular wave causes soft switching of
VCC
VREG
coil output waveform.
8
15μA 15μA
9
5μA
9
C2
1kΩ
2S
1/2VREG-VF
10
CX
The operating frequency range and minimum
operating frequency are determined from the value
of capacitor connected to this pin and GND in the
VCO circuit.
VCC
300Ω
VREG
100μA
11
VCOIN
VCO circuit voltage input pin.
Inputs the PCOUT pin voltage through CR filtering.
10
VCC
VREG
10kΩ
1.75V
11
50kΩ
50μA 50μA
Continued on next page.
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