Continued from preceding page.
Pin No.
Pin
Pin voltage
LB11880
Function
7
PGOUT2
PG Schmitt amplifier output
8
BFGO
Motor back EMF voltage detection FG output
(synthesized from three phases)
Equivalent circuit
V REG+VF
V CC
100 µA
5 kΩ
V REG
78
9
LVCC
8 to 13.8 V
Loading motor driver output transistor power
supply
10
VREF
0 to VCCL Loading motor driver output voltage setting
13 15 1 mA
30 kΩ
50 kΩ
10
1 mA
30 kΩ
VCCL
11
XIN
0 V to VREG Loading motor driver logic input
12
YIN
13
XOUT
15
YOUT
14
LGND
Loading motor driver output
Loading motor driver output transistor ground
100 kΩ
11
12
50 kΩ
V REG
50 kΩ
9
2 kΩ
2 kΩ
14
13 15
10
Continued on next page.
No. 6470-7/9