LB1988N データシートの表示（PDF） - SANYO -> Panasonic
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LB1988N Datasheet PDF : 9 Pages
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LB1988N
Continued from preceding page.
Pin No. Symbol
Voltage
Function
Equivalent circuit diagram
16
UOUT
VCC
17
VOUT
Drum motor driver output.
18
WOUT
3.9 Ω
30 kΩ
20
RF
Lowest potential of the drum motor driver output
transistor.
Constant-current control is implemented by detecting
this voltage.
The current limiter also functions by detecting this
voltage.
3.9 Ω
30 kΩ 20
Internal reference voltage and power supply for the
21
VCC
8 to 13.8 V drum motor driver output block and coil waveform
detection circuit.
10 kΩ
16
22
17
23
18
24
20 µF
19
MCOM
22
UIN
23
VIN
24
WIN
Motor coil midpoint input.
This voltage is used as the reference voltage in coil
voltage waveform detection.
Coil waveform detection comparator inputs.
These are connected to each of the phase outputs
though internal 10-kΩ resistors.
VCC
16 17 18
22
23
24
2 kΩ
10 kΩ
200 Ω
200 Ω
19
200 Ω
25
C1
26
C2
Triangular waveform generator capacitor connection.
The triangular waveform generated using this pin is
used to implement soft switching for the coil output
waveforms.
15 µF 15 µF
V REG
25
5 µF
26
1 kΩ
1/2VREG
-VF
27
CX
The value of the capacitor connected between this
pin and ground in the VCO circuit determines the
operating frequency range and the minimum
operating frequency.
300 Ω
V REG
100 µA
27
Continued on next page.
No. 6185-8/9
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