Panasonic AN8495SB Service Manual

New

0.30

+

0.10

-

0.05

21 152228

81471

0.65

±0.20

(1.315)

10.93

±0.30

8.30

±0.20

18.40

±0.20

(4.80)

(5.15)

SEATING PLANE

0.10

±0.10

2.70

±0.20

SEATING PLANE

(6.40)

(1.20)

0.35

+0.10

-

0.05

0˚ to 10˚

0.80

Stepping Motor Drive IC AN8495SB

■ Overview

AN8495SB is a stepping-motor-driving IC, created by using a D-MOS
process, and provides a maximum output of 30V at 1.5A. By the PWM drive
and 2-bit constant-current-chopping-drive method, the winding 1-2 phase

drive is possible.

■ Features

● 4-phase input (W1-2 phase excitation )

● 2-bit current level switching.

● Built-in noise canceler.

● Built-in phase-change thru-current protection function.

● Built-in flywheel diode

■ Applications

● Printer ● FAX ● PPC

Unit:mm

HSOP042-P-0400

¶ The products and specifications are subject to change without any notice. Please ask for the latest product standards to guarantee the satisfaction of your product requirements.

1 Kotari Yakemachi, Nagaokakyo, Kyoto, 617-8520 Japan Tel. [phone] http://www.panasonic.co.jp/semicon/

E00094AE

New publication, effective from Sep. 7. 2001

■ Block Diagram

V

CC

PHA1 IN0 IN1 IN2 IN3

ENABLEA

ENABLEB

PHB1

VM

25

* 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).

1

7

GATE CIRCUIT

17 128 22

3

R

Q

S

16

Rs

4

Senser

Current

23

26

FIN

BLANK

ENA.off

Vref

TSD

Signal

15

OSC

FIN

24

Senser

Current

Vref

6

5

14 13

9

R

S

2

Q

Rs

20 19

CHARGE

PUMP

CIRCUIT

GATE CIRCUIT

21

■ Pin Description

Pin No. Function Pin No. Function

1 PHA1 A phase changeover terminal 16 RCSA A phase current detector

2 PHB1 B phase changeover terminal 17 AOUT1 Motor drive A phase output 1

3 IN0 A phase output torque control 1 18 N.C 

4 IN1 A phase output torque control 2 19 BC1 Capacitor for charge pump circuit 1

5 IN2 B phase output torque control 1 20 BC2 Capacitor for charge pump circuit 2

6 IN3 B phase output torque control 2 21 VPUMP Charge pump circuit output

7

8 VM1 Supply terminal for Motor 1 23 VREFA A phase torque ref. voltage input

9

10 N.C  25 VCC Supply terminal

11 N.C  26 GND Signal GND

12 BOUT2 Motor drive B phase output 2 27 N.C 

13 RCSB B phase current detector 28 N.C 

14 BOUT1 Motor drive B phase output 1 FIN GND Signal GND

15 AOUT2 Motor drive A phase output 2

ENABLEA

ENABLEB

A phase start/stop signal input 22 VM2 Supply terminal for Motor 2

B phase start/stop signal input 24 VREFB B phase torque ref. voltage input

■ Absolute Maximum Ratings

Parameter

Storage temperature

Operating ambient temperature

Supply voltage

Supply current

Power dissipation

Motor supply voltage

Output voltage

Motor drive current

Flyhoile diode current

Charge pump circuit voltage

Symbol

T

T

opr

V

CC

I

CC

P

VM1/V

V

OUT

I

OUT

I

V

PUMP

Rating

stg

-55 to +150

-20 to +70

7.0

30

D

M2

1.04

30

30

±1.5

f

1.5

40

Note 1) Ta=25°C except storage temperature and operating ambient temperature.

Note 2) Power dissipation shows the value of only package at Ta=70°C.

■ Recommended Operating Range

Operating supply voltage range

V

CC

V

M

4.75 V to 5.25 V

18.0 V to 28.0 V

Unit

°C

°C

V

mA

W

V

V

A

A

V

Note

1

1

2

Pin=8,22

Pin=12,14

15,17

Pin=21

■ Electrical Characteristics (Ta = 25 °C ± 2 °C,VCC =5.0 V,VM = 24 V )

Parameter Symbol Condition min typ max Unit

Power block

Output saturation voltage H V

Output saturation voltage L V

Flywheel diode forward voltage V

Output leak current 1 I

LEAK1

Circuit current

Supply current (2-circuit ON) I

I/O block

IN “H” input voltage V

IN “L” input voltage V

IN “H” input current I

IN “L” input current I

PHA1,PHB1 “H” input voltage V

PHA1,PHB1 “L” input voltage V

PHA1,PHB1 “H” input current I

PHA1,PHB1 “L” input current I

PHAH/PHBH

PHAL/PHBL

PHAH/PHBH

PHAL/PHBL

OH

OL

CC

INH

INL

INH

INL

DI

ENABLEA=ENABLEB= 0 V  5 9.5 mA

I = -1.0 A VM-0.75 VM-0.5  V

I = 1.0 A  0.65 0.98 V

I = 1.0 A 0.5 1.0 1.5 V

V

OUT

= 30 V,V

= 0 V  10 50 µA

RCS

VIN = 5 V -10 0 10 µA

VIN = 0 V -80 -40 -20 µA

PHA1 = PHB1 = 5 V -10 0 10 µA

PHA1 = PHB1 = 0 V -150 -100 -50 µA

2.0  V

CC

GND  0.6 V

2.0  V

CC

GND  0.6 V

V

V