LB11997H Datasheet, PDF (6/8 Pages) Sanyo Semicon Device – Three-Phase Brushless Motor Driver for CD-ROM Spindle Drive

LB11997H
Pin Description
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
21
U_IN1
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
100µA
20 _200Ω
18
16
25µA
75µA
10kΩ
VCC1
14 13
A12508
25µA
25µA
VCC1
21
19
200Ω ₁₇
A12509
VCC1
15
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.
Reverse detector pin.
Forward rotation: High
Reverse rotation: Low
1 Hall element waveform Schmitt
comparator composite output.
U phase Hall element input and
reverse detector U phase Schmitt
comparator input pin.
Logic High indicates U_IN1 > U_IN2.
V phase Hall element input and
reverse detector V phase Schmitt
comparator input pin.
Logic High indicates V_IN1 > V_IN2.
W phase Hall element input and
reverse detector W phase Schmitt
comparator input pin.
Logic High indicates W_IN1 > W_IN2.
Hall element lower side bias
voltage supply pin.
30kΩ
2kΩ
75kΩ
11
50kΩ
A12510
VCC1
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.
A12511
VCC1
2kΩ
GND pin for all circuits except
output.
Control loop frequency
characteristics compensator pin.
Connecting a capacitor between this
pin and GND prevents closed loop
oscillation in current limiting circuitry.
6
20kΩ 5kΩ
A12512
Continued on next page
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