Ordering number : EN3515C

Monolithic Digital IC

LB1638 Low-Voltage, Low-Saturation

Bidirectional Motor Driver
LB1638M
Overview
The LB1638, LB1638M are low-saturation bidirectional motor driver ICs for use in low-voltage applications. At an IO of
500mA, they have a low saturation output of VO(sat) = 0.75V. They are especially suited for use in compact motor of
portable equipment.

Features
• Low voltage operation (2.5V min.)
• Low saturation voltage (upper transistor + lower transistor residual voltage; at IO = 500mA, VO(sat) = 0.75V typ.)
• Low current drain at standby mode (ICCO = 0.1μA typ. or less)
• Separate logic power supply and motor power supply
• Brake function
• Built-in spark killer diodes

Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage VCC max -0.3 to +10.5 V
VS max -0.3 to +10.5 V
Output applied voltage VOUT -0.3 to VS+VF V
Input applied voltage VIN -0.3 to +10.0 V
Ground pin flow-out current IGND 1.0 A
Allowable power dissipation Pd max LB1638 1.0 W
LB1638M: Independent IC 440 mW
LB1638M: Mounted on a specified board 550 mW
Operating temperature Topr -20 to +75 °C
Storage temperature Tstg -40 to +125 °C
* Specified board: 30mm × 30mm × 1.5mm, glass epoxy board.

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Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
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equipment.

D0308 MS/73096HA(II)/7190TA(GTPS) No.3515-1/4

 LB1638,1638M
Allowable Operating Conditions at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Supply voltage range VCC 2.5 to 9.0 V
VS 2.2 to 9.0 V
Input high-level voltage VIH 2.0 to 9.0 V
Input low-level VIL -0.3 to +0.7 V

Electrical Characteristics at Ta = 25°C, VCC = 5V

Ratings
Parameter Symbol Conditions Unit
min typ max
Current drain ICC0 VIN1,2 ICC + IS 10 μA
ICC1 VIN1 = 3V, VIN2 = 0V ICC + IS 20 mA
ICC2 VIN1,2 = 3V ICC + IS 40 mA
Output saturation voltage VOUT1 IOUT = 200mA 0.25 0.5 V
(upper + lower) VOUT2 IOUT = 500mA 0.70 1.3 V
Output pin voltage difference IO = 200mA 0.1 V
Output sustain voltage VO(sus) IOUT = 500mA 9 V
Input current IIN VIN = 7V, VCC = 7V 0.5 mA
Spark killer diode
Reverse current IS(leak) VCC, VS = 7V 10 μA
Forward voltage VSF IOUT = 200mA 1.7 V

Package Dimensions Package Dimensions

unit : mm (typ) unit : mm (typ)
3098D 3086B

9.14
5.0

0.63
10 6
10 6
7.62
6.4

6.4
4.4

1 5
0.25

0.95 1 5
1.7max

0.15
3.9 MAX
(3.0)

0.1 (1.5)
3.2

0.35 1.0 (0.5)

0.51 MIN

SANYO : MFP10S(225mil)

(1.01) 1.78 0.48

SANYO : DIP10S(300mil)

No.3515-2/4
 LB1638,1638M
Pd max -- Ta
1200

Allowable power dissipation, Pd max -- mW

1000
LB1638

800

LB1638M:
600 30×30×1.5mm3, glass epoxy board.
550
LB1638M: Independent IC
440
400

200

0
-20 0 20 40 60 75 80 100
Ambient temperature, Ta -- °C

Pin Assignment

GND 1 10 NC

IN1 2 9 OUT1

VCC 3
LB1638 8 VS
LB1638M
IN2 4 7 OUT2

GND 5 6 NC

Note: both ground pins must be grounded.

Truth Table
IN1 IN2 OUT1 OUT2 MOde
H L H L Forward
L H L H Reverse
H H L L Brake
L L OFF OFF Standby

Block Diagram and Sample Application Circuit

M
OUT1 OUT2
9 7
VS
8
VCC
3
Controller

IN1
2

IN2 Note: When using the same power supply

4
for VS and VCC, short the VCC and
VS pins to each other or insert a
capacitor in the VCC line.
1 5
GND GND

No.3515-3/4
 LB1638,1638M
VO(sat) -- IO
IS -- VS
1.4 30
VCC = VS = 3V VCC = VIN = 3V
Ta = 25°C Ta = 25°C
Output saturation voltage, VO(sat) -- V
1.2
25 Brake

Reverse current, IS -- mA
1.0
20

0.8
15
0.6 Forward / Reverse
10
0.4

5
0.2

0 0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 1 2 3 4 5 6 7 8
Output current, IO -- A Power supply voltage, VS -- V
IIN -- VIN ICC -- VCC
500 12
VCC = VS = 3V VCC = VIN = 3V
Ta = 25°C Ta = 25°C
10
400
Input current, IIN -- μA

Current drain, ICC -- A 8

300 e
ak
Br
6

200
4
erse
ard / Rev
100 Forw
2

0 0
0 1 2 3 4 5 6 7 8
Input voltage, VIN -- V Power supply voltage, VS -- V

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This catalog provides information as of December, 2008. Specifications and information herein are subject
to change without notice.

PS No.3515-4/4