User Guide

50
Q003 : BD7956FS
No. Symbol Description No. Symbol Description
1 LDO-
Loading driver negative output 28
DV
CC
PWM block control power supply
2 LDO+
Loading driver positive output 29
SLIN1
Sled driver 1 input
3V
CC
BTL pre and Loading power supply 30
SLIN2
Sled driver 2 input
4 ACTIN1
Actuator driver 1 input 31
SLV
DD
Sled driver PowerMOS pre-supply
5 ACTIN2
Actuator driver 2 input 32
SLRNF1
Sled driver 1 current sense
6 TJMON
Monitor of chip temperature 33
SLRNF2
Sled driver 2 current sense
7 BTHC
Capacitor connection terminal for spindle
current bottom holding
34
CTL1
Driver logic control 1 input
8 SPVM_S
Spindle driver sense power supply 35
CTL2
Driver logic control 2 input
9 PGND1
Spindle driver power ground 1 36
SLGND
Sled driver power ground
10 PGND2
Spindle driver power ground 2 37
SLO2-
Sled driver 2 negative output
11 U
Spindle driver output U 38
SLO2+
Sled driver 2 positive output
12 SPV
M
1
Spindle driver power supply 1 39
SLO1-
Sled driver 1 negative output
13 V
Spindle driver output V 40
SLO1+
Sled driver 1 positive output
14 fi n
fi n 4 1
fi n
fi n
15 PGND3
Spindle driver power ground 3 42
V
C
Reference voltage input
16 W
Spindle driver output W 43
FG
Frequency generator output
17 SPV
M
2
Spindle driver power supply 2 44
SPCNF
Spindle driver feedback fi lter
18 SPRNF
Spindle driver current sense 45
AGND
BTL driver block power ground
19 HB
Hall bias 46
LDIN
Loading driver input
20 HU+
Hall amp.U positive input 47
ACTIN3
Actuator driver 3 input
21 HU-
Hall amp.U negative input 48
AV
M
Actuator driver block power supply
22 HV+
Hall amp.V positive input 49
ACO3-
Actuator driver 3 negative output
23 HV-
Hall amp.V negative input 50
ACO3+
Actuator driver 3 positive output
24 HW+
Hall amp.W positive input 51
ACO2-
Actuator driver 2 negative output
25 HW-
Hall amp.W negative input 52
ACO2+
Actuator driver 2 positive output
26 SPIN
Spindle driver input 53
ACO1-
Actuator driver 1 negative output
27 DGND
PWM block pre-ground 54
ACO1+
Actuator driver 1 positive output