LB11995H Datasheet, PDF (9/10 Pages) Sanyo Semicon Device – Three-Phase Brushless Motor Driver for CD-ROM Spindle Drive

LB11995H
Continued from preceding page
Pin number Pin name Pin voltage
5
V_CREF
0V to V_CC1
–1.5V
4
V_C
0V to V_CC1
15µA
200Ω
4
Equivalent circuit
25µA
25µA
51kΩ
15µA
VCC1
200Ω
5
Pin function
Control reference voltage supply
pin. Determines control start
voltage.
Speed control voltage supply pin
V type control technique
V_C > V_CREF : Forward
V_C < V_CREF : Slowdown
(Reverse-blocking circuit
prevents reverse rotation.)
2
W_OUT
1
PWR GND
28
V_OUT
27
U_OUT
23
RF
7
LMC
12
BRAKE
3.9Ω
3.9Ω
VCC1
100µA
A12359
VCC2
23
27 28 2
1
A12360
W phase output
Output transistor GND
V phase output
U phase output
Upper side output NPN transistor
collector pin (common for all 3
phases). For current detection,
connect resistor between V_CC3
pin and RF pin. Constant current
control and current limiter works
by detecting this voltage.
RF
5kΩ
7
15kΩ
When this pin is connected to GND,
the limiter setting current is
increased by a factor of 1.5.
7kΩ
A12361
VCC1
75kΩ
12
50kΩ
Short brake pin
BRAKE:
High –> Short brake operation
Low/Open –> Motor drive operation
A12362
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