LB11995H Datasheet, PDF (8/10 Pages) Sanyo Semicon Device – Three-Phase Brushless Motor Driver for CD-ROM Spindle Drive

LB11995H
Pin Descriptions
Pin number Pin name Pin voltage
26
V_CC2
4V to 13.6V
25
V_CC3
4V to 13.6V
22
V_CC1
4V to 6V
14
RS
13
FG
20
U_IN1
21
U_IN2
18
V_IN1
1.2V to
19
V_IN2
V_CC1–1V
16
W_IN1
17
W_IN2
15
V_H
11
S/S
0V to V_CC1
8
SIG GND
6
FC
Equivalent circuit
Pin function
Source side predrive voltage supply
pin
Constant current control amplifier
voltage supply pin
Power supply pin for all circuits
except output transistors, source
predriver, and constant current
control amplifier
100µA
10kΩ
VCC1
13 14
Reverse detector pin
Forward rotation: High
Reverse rotation: Low
A12354
1 Hall element waveform Schmitt
comparator composite output
20 _200Ω
18
16
25µA
75µA
U phase Hall element input and
reverse detector U phase Schmitt
VCC1 comparator input pin
25µA
Logic High indicates U_IN1 > U_IN2.
21
19
200Ω ₁₇
V phase Hall element input and
reverse detector V phase Schmitt
comparator input pin
Logic High indicates V_IN1 > V_IN2.
25µA
W phase Hall element input and
reverse detector W phase Schmitt
A12355
comparator input pin
Logic High indicates W_IN1 > W_IN2.
VCC1
Hall element lower side bias voltage
supply pin
15
30kΩ
2kΩ
75kΩ
11
50kΩ
A12356
VCC1
A12357
VCC1
2kΩ
6
20kΩ 5kΩ
A12358
When this pin is at 0.7V or lower, or
when it is open, all circuits are
inactive. When driving motor, set
this pin to 2V or higher.
GND pin for all circuits except
output
Control loop frequency compensa-
tor pin. Connecting a capacitor
between this pin and GND prevents
closed loop oscillation in current
limiting circuitry.
Continued on next page
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