SANYO LB1948M_09

Ordering number : EN7714A
Monolithic Digital IC
LB1948M
12V Low Saturation Voltage Drive
Forward/Reverse Motor Driver
Overview
The LB1948M is a 2-channel low saturation voltage forward/reverse motor driver IC. It is optimal for motor drive in 12V
system products and can drive either two DC motors, one DC motor using parallel connection, or a 2-phase bipolar
stepping motor with 1-2 phase excitation mode drive.
Features
• Supports 12V power supply systems
• Low saturation voltage: VO(sat) = 0.5V (typical) at IO = 400mA
• Zero current drawn in standby mode
• Braking function
• Supports parallel connection: IO max = 1.6A, VO(sat) = 0.6V (typical) at IO = 800mA
• Built-in spark killer diode
• Built-in thermal shutdown circuit
• Miniature package: MFP-10S (6.4mm × 5.0mm)
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Symbol
Conditions
VCC max
Ratings
Unit
-0.3 to +20
V
Output voltage
VOUT
-0.3 to +20
V
Input voltage
VIN
-0.3 to +18
V
Ground pin source current
IGND
Per channel
800
mA
Allowable power dissipation
Pd max1
Independent IC
350
mW
Pd max2
Mounted on a specified board*
870
mW
Operating temperature
Topr
-20 to +85
°C
Storage temperature
Tstg
-40 to +150
°C
* Specified board: 114.3mm × 76.1mm × 1.6mm, glass epoxy board.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
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
device, the customer should always evaluate and test devices mounted in the customer' s products or
equipment.
http://semicon.sanyo.com/en/network
D2408 MS / 31004TN (OT) No.7714-1/6
LB1948M
Allowable Operating Range at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
VCC
2.5 to 16
V
Input high-level voltage
VIH
1.8 to 10
V
Input low-level voltage
VIL
-0.3 to +0.7
V
Electrical Characteristics at Ta = 25°C, VCC = 5V
Parameter
Symbol
Ratings
Conditions
min
Current drain
Unit
typ
max
ICC0
IN1, 2, 3, 4 = 0V (Standby mode)
0.1
10
µA
ICC1
*1 (Forward or reverse mode)
15
21
mA
mA
ICC2
*2 (Brake mode)
30
40
Output saturation voltage
VO(sat)1
IOUT = 200mA (High Side and Low Side)
0.25
0.35
VO(sat)2
IOUT = 400mA (High Side and Low Side)
0.50
0.75
V
Input current
IIN
VIN = 5V
85
110
µA
30
µA
1.7
V
V
Spark Killer Diode
Reverse current
IS(leak)
Forward voltage
VSF
IOUT = 400mA
*1:IN1/IN2/IN3/IN4=H/L/L/L or L/H/L/L or L/L/H/L or L/L/L/H.
*2:IN1/IN2/IN3/IN4=H/H/L/L or L/L/H/H.
Package Dimensions
unit : mm (typ)
3086B
Pd max -- Ta
10
0.63
5.0
4.4
6.4
6
0.15
0.1 (1.5)
1.7max
5
1
Allowable power dissipation, Pd max -- W
1.0
0.35
1.0
Specified board: 114.3×76.1×1.6mm3
glass epoxy board.
0.87
0.8
0.6
0.45
0.4
0.35
Independent IC
0.2
0
-20
(0.5)
0.18
0
20
40
60
80 85
100
Ambient temperature, Ta -- °C
SANYO : MFP10S(225mil)
Pin Assignment
VCC 1
10 OUT1
IN1 2
9 OUT2
IN2 3
LB1948M
8 OUT3
IN3 4
7 OUT4
IN4 5
6 GND
Top view
No.7714-2/6
LB1948M
Truth Table
Input
Output
Notes
IN1
IN2
IN3
IN4
OUT1
OUT2
OUT3
OUT4
L
L
L
L
OFF
OFF
OFF
OFF
L
L
OFF
OFF
H
L
H
L
L
H
L
H
Reverse
H
H
L
L
Brake
Standby mode
Standby mode
1CH
Forward
L
L
OFF
OFF
H
L
H
L
Standby mode
L
H
L
H
Reverse
H
H
L
L
Brake
2CH
Forward
Block Diagram
10µF
VCC
60kΩ
OUT1
80kΩ
IN1
M
IN3
60kΩ
80kΩ
60kΩ
80kΩ
IN4
Thermal shutdown circuit
60kΩ
80kΩ
IN2
Control block
OUT2
OUT3
M
OUT4
GND
No.7714-3/6
LB1948M
Design Documentation
(1) Voltage magnitude relationship
There are no restrictions on the magnitude relationships between the voltages applied to VCC and IN1 to IN4.
(2) Parallel connection
The LB1948M can be used as a single-channel H-bridge power supply by connecting IN1 to IN3, IN2 to IN4, OUT1
to OUT3, and OUT2 to OUT4 as shown in the figure. (IOmax = 1.6A, VO(sat) = 0.6V (typical) at IO = 800mA)
1 VCC
OUT1 10
2 IN1
OUT2 9
3 IN2
LB1948M OUT3 8
4 IN3
OUT4 7
5 IN4
GND 6
M
(3) Observe the following points when designing the printed circuit board pattern layout.
• Make the VCC and ground lines as wide and as short as possible to lower the wiring inductance.
• Insert bypass capacitors between VCC and ground mounted as close as possible to the IC.
• Resistors of about 10KΩ must be inserted between the CPU output ports and the IN1 to IN4 pins if the
microcontroller and the LB1948M are mounted on different printed circuit boards and the ground potentials differ
significantly.
Thermal Shutdown Temperature
(1) Thermal shutdown temperature
The thermal shutdown temperature Ttsd is 200 ± 20°C with fluctuations.
(2) Thermal shutdown operation
The operation of the thermal shutdown circuit is shown in the figure below.
When the chip temperature Tj is in the direction of increasing (solid line), the output turns off at approximately 200°C.
When the chip temperature Tj is in the direction of decreasing (dotted line), the output turns on (returns) at approximately
125°C.
14
LB1948M Thermal shutdown reference chart
VCC = 12V
100°C
Output voltage, VO -- V
12
220°C
Return
10
TSD operation
8
6
4
2
220°C
0
100
120
140
160
100°C
180
200
220
Chip temperature, Tj -- °C
No.7714-4/6
LB1948M
Thermal Shutdown Circuit Block Diagram
Reference
voltage
circuit
Thermal
shutdown
circuit
Drive circuit
Vref
Function equivalent circuit
Note: The above is an example of thermal shutdown circuits although there are some differences from the actual internal
circuit.
Thermal Shutdown Operation
The thermal shutdown circuit compares the voltage of the heat sensitive element (diode) with the reference voltage and
shuts off the drive circuit at a certain temperature to protect the IC chip from overheating.
ICC -- VCC
40
IIN -- VIN
400
VIN = 5V
VCC = 12V
30
Input current, IIN -- µA
Current drain, ICC -- mA
(= IN1 / IN2 or IN3 / IN4)
H/H
20
H / L, L /H
10
0
L/L
0
5
10
15
300
1~
IN
100
0
20
4
200
0
5
Supply voltage, VCC -- V
VO(sat) -- IO
15
VCC = 12V
VCC = 12V
0.5
(IN1
0.4
e
ow
0.3
nd
sid
L
a
de
h
ig
0.2
20
ICC -- Ta
40
Current drain, ICC -- mA
Output saturation voltage, VO(sat) -- V
0.6
10
Input voltage, VIN -- V
si
H
30
/ 2) H
/H
20
H / L, L /H
10
0.1
0
0
100
200
300
400
Output current, IO -- mA
500
600
0
-40
-20
0
20
40
60
80
100
120
140
Ambient temperature, Ta -- °C
No.7714-5/6
LB1948M
Output saturation voltage, VO(sat) -- V
0.7
0.6
VO(sat) -- Ta
VCC = 12V
High side and Low side
00mA
0.5
IO= 4
0.4
300mA
0.3
200mA
0.2
100mA
0.1
0
-40
-20
0
20
40
60
80
100
120
140
Ambient temperature, Ta -- °C
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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 Semiconductor Co.,Ltd.
products described or contained herein.
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Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
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This catalog provides information as of December, 2008. Specifications and information herein are subject
to change without notice.
PS No.7714-6/6