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LB1978 Datasheet(PDF) 4 Page - Sanyo Semicon Device

Part # LB1978
Description  Three-Phase Half-Wave Sensorless Motor Driver for Headphone Stereos
PDF  9 Pages
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Manufacturer  SANYO [Sanyo Semicon Device]
Direct Link  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LB1978 Datasheet(HTML) 4 Page - Sanyo Semicon Device

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LB1978V
No. 6186-4/9
Equivalent Circuit Block Diagram
Sample Application Circuit
Oscillator
Divider
Rotation
detector
Brake
circuit
Constant
current circuit
Startup
detection
Current bias
Reference
voltage
Speed
select
divider
d/dt
Pulse
Current
buffer
VI
PGND
DU
FC
W2
V2
U2
W1
V1
U1
BR2
BR1
P3
P2
P1
TC2
TC1
DR
IRF
COM
S/S
Vref
SGND
F/S
CI
PW
PV IV
VI
Startup
switching
Soft switching
Vcc
OSC
Comparator
30
28
29
27
25
26
24
22
23
21
19
20
18
16
17
1
3
2
4
6
5
7
9
8
10
12
11
13
15
14
Vcc VREF S/S
DR
F/S
W1
V1
U1
PGND W2
V2
U2
DU SGND P3
OSC COM IRF
FC
CI
PW
PV
IV
VI
BR1 BR2 TC1 TC2
P1
P2
0.33
µF
0.1
µF
680k
Ω
180
k
Ω
6.2k
Ω
0.1
µF
0.033
µF
20k
Ω
68k
Ω
180
k
Ω
2.2
µF
1500pF
0.01
µF
1k
Ω
0.01
µF
0.01
µF
0.01
µF
1
µF
100
Ω
LB1978V



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