LB11683H Datasheet, PDF (5/7 Pages) Sanyo Semicon Device – Three-Phase Sensorless Motor Driver

LB11683H
Pin Functions
Pin
Symbol
No.
Description
1
UOUT
3-phase motor driver output
28
VOUT
27
WOUT
3
RF
Minimum potential of 3-phase motor driver
output transistor.
Constant current control is made through
detection of this voltage. The current limiter
also functions by detecting this potential.
22
VCC
Power supply
26
MCOM
Motor coil neutral point input pin.
The coil voltage waveform is detected with
reference to this voltage.
21
UIN
Coil waveform detection comparator input pin.
This pin is connected to each phase output
through the internal 10kΩ resistor.
20
VIN
Pin Voltage
8 to 13.8V
19
WIN
Equivalent Circuit
3.9kΩ
30kΩ
3.9kΩ
30kΩ
3
20µA
10kΩ
VCC
1
21
27
20
28
19
VCC
1 28 27
21
20
19
200Ω
200Ω
26
200Ω
18
C1
Triangular wave generating capacitor
connection pin.
This triangular wave performs soft-switching of
the coil output waveforms.
17
C2
15µA 15µA
VCC
18 ^5µA
17
1kΩ
VREG
16
CX
In the VCO circuit, the operation frequency
range and minimum operation frequency are
determined by means of the capacitor value
connected this pin and ground.
2S
1/2VREG-VF
VCC
300Ω
VREG
100µA
15
VCOIN
VCO circuit voltage input pin.
The PCOUT pin voltage is input via CR filter.
16
VCC
VREG
10kΩ
1.75V
15
50kΩ
50µA 50µA
Continued on next page.
No. A0954-5/7