SANYO LB1841V Datasheet

Ordering number : ENN4384A

LB1841V

Monolithic Digital IC

LB1841V

Low-Saturation Current-Controlled

Forward/Reverse Motor Driver

Overview

The LB1841V is a low-saturation current-controlled
forward/reverse motor driver with provision for a constant
voltage circuit using an external transistor and an output
current limiter function. Its design is optimized for use in
video camera loading motors.

Features

• Built-in output current limiter and detector circuit

• Built-in low-saturation voltage forward/reverse bridge
circuit: VOsat = 0.40V typ. at 400 mA

• Little current drain in standby mode
(up to 0.1 µA)

• Built-in low-saturation constant voltage circuit using an
external pnp transistor

• Built-in reference voltage linked to input

• Built-in thermal shutdown circuit

• Low external parts count. Compact SSOP-20 package
allows space saving design.

Package Dimensions

unit: mm

3179A-SSOP20

[LB1841V]

20

110

6.7

11

0.650.22 0.43

4.4

0.15

1.6max

0.1

SANYO : SSOP20

1.0

6.4

0.5

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCC max 10.5 V
Maximum output current Im max 800 mA
Applied input voltage V
Allowable power dissipation Pd max With substrate (50 × 35 × 1.6 mm3) 800 mW
Operating temperature Topr –20 to +80 °C
Storage temperature Tstg –40 to +150 °C

Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft's
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.

IN

–0.3 to +10 V

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

73099RM(KI)

No. 4384-1/7

LB1841V

Allowable Operating Ranges at Ta = 25°C

Parameter Symbol Conditions Ratings Unit
Power supply voltage V
Input High voltage V
Input Low voltage V
SVR input voltage V
LIR input voltage V
Output current limiter I

CC

IH

IL

SVR

LIR

limit

Electrical Characteristics at Ta = 25°C, VCC = 7.2V

Parameter Symbol Conditions
Power supply current ICC 0 In standby mode 0.1 10 µA

ICC 1 Forward/reverse No load 9 13 mA
ICC 2 In brake mode 12 18 mA

Output saturation voltage Vsat 1 IO = 200 mA (upper side + lower side) 0.20 0.30 V

Vsat 2 IO = 400 mA (upper side + lower side) 0.40 0.60 V
Reference voltage Vref I
Current limiter characteristics I
Input current I
PBC drive current I
Vs output voltage V

limit

IN

PBC

S

= 1 mA 1.85 2.0 2.15 V

Vref

VS-VM resistance = 1Ω at LIR = 2V 165 185 205 mA
VIN = 5V 90 150 µA

RD saturation voltage VRDsat IO = 1 mA 0.3 V

min typ max

3.0 to 9.0 V

3.0 to 9.0 V

–0.3 to 0.7 V

1.0 to VCC–0.2 V

0.5 to VCC–1.0 V
50 to 350 mA

Ratings

–10 mA

2.55×V

SVR

Unit

V

Constant-voltage output VS is determined by the equation VS = 2.55 × V
The input range of V

is 1.0 to 4 V. When VS ≥ VCC, the output will be saturated.

SVR

SVR

.

The output current limiter value is determined according to the following equation (Rf is a sensing resistor across VS and VM).

I limit = V

V

input range is 0.5 to VCC –1.0 (V).

LIR

/10 Rf(A)

LIR

Block Diagram and Sample Application Circuit

VCC = 3 to 10.5V

10µF

SVR

LIR

VS = 5.1V

10µF

cc

PBC V

S

V

= 0.47 to 2Ω

R

f

V

M

OUT1

0.001µF
to 0.01µF

OUT2
P-G

M

Vref
= 2.0V

Thermal

shutdown

S-G

DECODER

RD

Limit

detection

DELIN2IN1

No. 4384-2/7

Pin Assignment

P-GND

OUT1
OUT1

V

LB1841V

1
2
3

4

M

20
19
18

17

P-GND
OUT2
OUT2

LIR

V

5

Note) • VM (motor power supply/sensing pin)

are both connected.

• P-GND (motor power supply GND pin)
are both connected.

• S-GND (control power supply ground

V

PBC

V

V

NC

M

S

CC

ref

LB1841V

6
7
8
9

10

pin) is connected to microprocessor
ground.

Truth Table

Bridge and VS circuits

Input Output

IN1 IN2 OUT1 OUT2 V

L L off off off Standby

H L H L H Forward rotation

L H L H H Reverse rotation

H H L L off Brake

Output current limiter and detection output

DEL OUT output RD

H

limit L

Non-limit off

L Saturation off

S

16
15
14
13
12
11

(Top view)

Mode

SVR
DEL
IN2
IN1
RD
S-GND

Pd max – Ta

1000

Specified substrate (50×35×1.6 mm3, glass epoxy)

800

600

400

200

Allowable power dissipation, Pd max – mW

0

–20 0 20 40 60 80 100

Ambient temperature, Ta – °C

No. 4384-3/7