SANYO LB1837M Datasheet

Ordering number: EN3948B

Monolithic Digital IC

LB1837M

Low-voltage/Low-saturation Bidirectional
Constant-Voltage Regulated Motor Driver

Overview

The LB1837M is a low-voltage, low-saturation, two-channel
motor driver with a bidirectional braking function that provides
constant-voltage regulated output for bidirectional operation.
The design of the LB1837M is ideal for video equipment,
cameras, and other portable equipment.

Features

.

Wide operating voltage range (3.0 to 9.0 V).

.

Low saturation voltage
V

(sat) = 0.40 V at IO= 200 mA.

O

.

Consumes almost no current in standby mode
(0.1 µA or less).

.

Permits setting of bidirectional constant-voltage regulated
value.

.

Built-in reference voltage coupled to input.

.

Brake function built in.

.

Compact MFP14S package.

Specifications

Package Dimensions

unit: mm

3111-MFP14S

[LB1837M]

SANYO : MFP14S

Absolute Maximum Ratings atTa=25°C

Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Output current Im max 250 mA
Applied input voltage V
Allowable power dissipation Pd max With board ( 30 x 30 x 1.5 mm
Operating temperature Topr –20 to +80
Storage temperature Tstg –40 to +125

max 10.5 V

CC

IN

3

) 800 mW

–0.3 to +10 V

Allowable Operating Ranges atTa=25°C

Parameter Symbol Conditions Ratings Unit
Supply voltage V
Input [H] voltage V
Input [L] voltage V
Control voltage V

CC

IH
IL

C

3.0 to 9.0 V

3.0 to 9.0 V

–0.3 to +0.7 V

0.2 to 6.0 V

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61295HA(II) No.3948-1/5

C

°

C

°

LB1837M

Electrical Characteristics atTa=25°C, VCC=6V

Parameter Symbol Conditions min typ max Unit

Supply current I

Output saturation voltage Vsat1 I

Reference voltage Vref Ivref=1mA 1.85 2.0 2.15 V
Output voltage

voltage characteristics
Output voltage

current characteristics
Input current I

Output voltage V

Equivalent Circuit Block Diagram

(For one channel)

0 During standby 0.1 10 µA

CC

I

CC

I

CC

I

CC

Vsat2 I
Vsat3 I

∆V

∆V

∆V
∆I

CC

IN

(For one channel) During bidirectional operation

1

(For one channel) During bidirectional operation

2
3 During braking (for one channel) 6.5 9 mA

= 100 mA (upper side + lower side) 0.3 0.4 V

O

= 200 mA (upper side + lower side) 0.4 0.55 V

O

= 200 mA (lower side) 0.07 0.10 0.15 V

O

VO=5V,VCC= 5.5 to 9 V,

O

I

= 100 mA

CC

O

O

VO=5V,VCC=6V,

O

I

=10to100mA

O

VIN= 5 V 90 150 µA
Between OUT and GND

during control, load open

during saturation, load open

2.5xV

23mA

35mA

C

2.7xVCV

20 mV

50 mV

Thermal

Reference

voltage

Logic predriver

Truth Table

Input Output

IN 1/3 IN 2/4 OUT 1/3 OUT 2/4

L L OFF OFF Standby

HLHL

LHLH

H H L L Brake

Pin Assignment

Mode

Constant-voltage
regulated forward
operation

Constant-voltage
regulated reverse
operation

The constant-voltage regulated output VO(= voltage between H
side output and GND) is controlled by 2.5 x V
in the saturated state when the V
V

^ VCC.

O

input range is 0.2 to 6 V and

C

. The output is

C

Note: Both GND pins must be grounded.

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