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2010.06 - Rev.A

© 2010 ROHM Co., Ltd. All rights reserved.

Motor Drivers for Printers

System Driver

for Ink Jet Printers

BD64550EFV

●

Description

This is 1-chip system motor driver integrating 2-channel H-bridge driver, step-down switching regulator with built-in power

DMOS, series regulator and reset output.

●

Features

1) Low-on resistance output H-bridge driver (2-channel)

2) Constant-current chopping drive H-bridge driver

3) Switching regulator with built-in P-channel power DMOS FET

4) Soft start function: 23.6 ms (Typ.)

5) Reset release timer: 80 ms (Typ.)

6) 16 bit serial interface

7) Logic input interface (serial/parallel changeable)

8) Ultra thin type high heat dissipation HTSSOP-B40 package

9) Overcurrent protection in H-bridge driver block

10) Input voltage low voltage protection in H-bridge driver block

11) Overcurrent protection in switching regulator block

12) Output overvoltage protection in switching regulator block

13) Output low voltage protection in switching regulator block

14) Thermal shutdown

●

Applications

Inkjet printer, photo printer, etc.

●

Absolute Maximum Ratings (Ta=25℃)

Parameter

Symbol

Ratings

Unit

VM applied voltage

40

V

Logic input voltage

-0.4 ~ 5.5

V

RIN applied voltage

5.5

V

RNF voltage

0.5

V

Power dissipation

Pd

1600*

mW

Operating temperature range

T

OPR

-25 ~ +85

℃

Storage temperature range

T

STG

-55 ~ +150

℃

Junction temperature

150

℃

Motor driver output current (peak 500 ns)

8.0

A

Motor driver output current (DC)

2.5**

A

Switching regulator output current (DC)

0.5

A

Series regulator output current (DC)

0.25

A

* Reduced by 12.8 mW/℃ over 25 ℃, when mounted on a glass epoxy board (70 mm x 70 mm x 1.6 mm).

** Must not exceed Pd or ASO.

●

Operating Conditions

Parameter

Symbol

Limit

Unit

VM operating power supply voltage range

7 ~ 36

V

SCLK max. operating frequency

20

MHz

Switching regulator output voltage range

3 ~ 5

V

No.10016EAT03