BA6438S

Motor driver ICs

!Pin descriptions

Pin No.

1A3

2

ATC

3A2

4

PCH

10

11

12

GND

13

REG

14

15

OSC

16

ECR

17

EC

18

PCV

19

20

TL

21

PCI

22

CS

23

A1

24

ED / S

Pin name

Function

Motor output

Driver ground

Motor output

Hall amplifier AGC phase compensation

Hall signal input

Hall signal input

Hall signal input

Hall signal input

Hall signal input

Hall signal input

Signal ground

Switching regulator output (sink output)

High-side saturation detection output

Oscillator capacitor connection

Torque control reference voltage input

Torque control signal input

Phase compensation for preventing driver high-side saturation

Signal power supply

Torque limiter

Phase compensation for preventing driver low-side saturation

Current sensing input

Motor output

Motor power supply

Forward when LOW; stop when MEDIUM; reverse when HIGH

!Electrical characteristics

(unless otherwise noted, Ta = 25

Parameter

Symbol

Min.

Typ.

Max.

Unit

Conditions

0.25

0.31

0.36

−

→2.1V,

4.6

6.4

7.2

%

1.1

1.5

1.9

V

0.95

1.3

1.65

V

100

135

160

kHz

5.0

6.5

8.0

−−

30

−−

mA

→L, M, H

Not designed for radiation resistance.

Torque control input / output gain

Ripple cancel ratio

Output high level voltage

Output low level voltage

Oscillator frequency

Saturation detection output gain

Regulator current capacity