AN8495SB Datasheet, PDF (2/2 Pages) Panasonic Semiconductor – Stepping Motor Drive IC

■ Block Diagram
V_CC
PHA1 IN0 IN1
ENABLEA
IN2 IN3
PHB1
ENABLEB
25 7 1 3 4 23
R
QS
Senser
Current
FIN
24
56
BLANK
OSC
Senser
Current
92
R
SQ
ENA.off
Vref
Vref
TSD
Signal
20 19
CHARGE
PUMP
CIRCUIT
8 17
16
26 15
FIN
14
Rs
VM
13 12 22 21
Rs
* A voltage is applied externally to Terminals PHA1, PHB1, IN0 to 3, ENABLEA, ENABLEB, VREFA and VREFV, and may cause an overcurrent.
To protect the device from overcurrent, insert an overcurrent protective resistor (1KΩ or over).
■ Pin Descriptions
Pin No. Symbol
1
PHA1
2
PHB1
3
IN0
4
IN1
5
IN2
6
IN3
7 ENABLEA
8
VM1
9 ENABLEB
10
N.C
11
N.C
12 BOUT2
13 RCSB
14 BOUT1
15 AOUT2
Function
A phase changeover terminal
B phase changeover terminal
A phase output torque control 1
A phase output torque control 2
B phase output torque control 1
B phase output torque control 2
A phase start/stop signal input
Supply terminal for Motor 1
B phase start/stop signal input
-
-
Motor drive B phase output 2
B phase current detector
Motor drive B phase output 1
Motor drive A phase output 2
Pin No.
16
17
18
19
20
21
22
23
24
25
26
27
28
FIN
Symbol
RCSA
AOUT1
N.C
BC1
BC2
VPUMP
VM2
VREFA
VREFB
VCC
GND
N.C
N.C
GND
Function
A phase current detector
Motor drive A phase output 1
-
Capacitor for charge pump circuit 1
Capacitor for charge pump circuit 2
Charge pump circuit output
Supply terminal for Motor 2
A phase torque ref. voltage input
B phase torque ref. voltage input
Supply terminal
Signal GND
-
-
Signal GND