Ordering number : EN6192B
Monolithic Digital IC
LB1947
PWM Current Control Type
Bidirectional Motor Driver
Overview
The LB1947 is a PWM current control type bidirectional motor driver IC.
Features
• PWM current control (fixed OFF time)
• Selectable current decay pattern (FAST, SLOW, and MIX DECAY modes)
• Simultaneous ON prevention function (feed-through current prevention)
• Built-in thermal shutdown circuit
• Built-in noise canceler
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
Maximum motor supply voltage
VBB max
Output peak current
IO peak
Conditions
tw ≤ 20µs
Ratings
Unit
50
V
2.25
A
Output continuous current
IO max
2.0
A
Logic supply voltage
VCC max
7.0
V
Logic input voltage range
VIN
-0.3 to VCC
V
Emitter output voltage
VE max
Reference voltage
VREF
1.1
V
-0.3 to VCC
V
Allowable power dissipation
Pd max
1.6
W
Operating temperature
Topr
-20 to +85
°C
Storage temperature
Tstg
-55 to +150
°C
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.
22509 MS / 80699RM(KI) No.6192-1/9
LB1947
Allowable Operating Ranges at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Motor supply voltage
VBB
10 to 45
V
Logic supply voltage
VCC
4.75 to 5.25
V
Reference voltage
VREF
0 to VCC-2
V
Electrical Characteristics at Ta = 25°C, VCC = 5V
Parameter
Symbol
Ratings
Conditions
min
typ
Unit
max
Output Block
Output stage supply current
IBB ON
No-load state, Forward
0.4
0.6
1.0
mA
IBB BR
No-load state, Brake
0.2
0.4
0.8
mA
IBB OFF
No-load state, Output off
0.2
0.4
0.8
mA
IBB wt
No-load state, Standby mode
0.1
mA
VOsat1
IO = +1.0A, Sink
1.2
1.5
V
VOsat2
IO = +2.0A, Sink
1.6
1.9
V
VOsat3
IO = -1.0A, Source
1.8
2.2
V
VOsat4
IO = -2.0A, Source
2.1
2.4
V
Output leak current
IO1(leak)
VO = VBB, Sink
50
µA
IO2(leak)
VO = 0V, Source
-50
µA
Output sustain voltage
VSUS
L = 3.9mH, IO = 2.0A, Design guarantee value*
50
V
ICC ON
IN1: High, IN2: Low, ST: High
11
16
21
ICC BR
IN1: Low, IN2: High, ST: High
11
16
21
mA
ICC OFF
IN1: Low, IN2: Low, ST: High
11
16
21
mA
ICC wt
ST: Low
1.0
2
3.0
mA
0.8
V
120
µA
13
µA
Output saturation voltage
Logic Block
Logic supply current
Input voltage
VINH
2
V
VINL
Input current
IINH
VIN = 5V
IINL
VIN = 0.8V
Sensing voltage
VE
Sensing voltage 25H
VEH25
mA
60
90
6
10
0
1.1
V
VI = High, VREF = 2.5V
0.970
1.0
1.030
V
V
Sensing voltage 25L
VEL25
VI = Low, VREF = 2.5V
0.483
0.5
0.513
Sensing voltage 15H
VEH15
VI = High, VREF = 1.5V
0.385
0.4
0.410
V
Sensing voltage 15L
VEL15
VI = Low, VREF = 1.5V
0.190
0.2
0.210
V
Sensing voltage 05H
VEH05
VI = High, VREF = 0.5V
0.190
0.2
0.210
V
Sensing voltage 05L
VEL05
VI = Low, VREF = 0.5V
0.092
0.1
0.108
V
Reference current
Iref
VREF = 1.0V
+0.5
µA
CR pin current
ICR
-1.04
mA
MD pin voltage
VMDH
VCC-0.3
VMDM
0.3VCC
VCC-1.0
.0.4
V
+1.0
µA
-0.5
-1.56
-1.3
V
VMDL
MD input current
Thermal shutdown temperature
IMDH
MD = VCC-0.5V, CR = 1.0V
-1.0
IMDL
MD = 0.4V, CR = 2.0V
-5.0
TSD
Design guarantee value*
V
µA
170
°C
* Design guarantee value, Do not measurement.
No.6192-2/9
LB1947
Package Dimensions
unit : mm (typ)
3249
2.4
25.6
( 2.0)
(10.0)
2.0
1.15
0.5
13
2.0 MIN
1 2
3.5
(13.9)
12.2
(12.8)
16.4 MAX
3.4
3.0 MIN
C0.7
0.4
1.2
(0.8)
SANYO : SIP13HJ
Pd max -- Ta
Allowable power dissipation, Pd max -- W
2.0
1.6
1.2
0.8
0.4
0
-20
0
20
40
60
80 85
100
Ambient temperature, Ta -- °C
Pin Assignment
LB1947
1
2
3
4
5
6
7
8
9
10
11
12
13
GND
MD
CR
VREF
IN2
IN1
VCC
VBB
ST
VI
OUTA
E
OUTA
Top view
No.6192-3/9
LB1947
Block Diagram
OUTA
OUTA
3
1
VBB
6
MD 12
7 VCC
IN1 8
Control
logic
IN2 9
circuit
ST 5
VI 4
Thermal
shutdown circuit
UVLO
VREF 10
One-shot
multiblanking
time
Current
select
circuit
GND 13
11
CR
2
E
Truth Table
IN1
IN2
ST
VI
MD
OUTA
OUTA
H
L
H
H
L
H
L
Operating mode
Forward, 2/5 times, FAST
H
L
H
H
M
H
L
Forward, 2/5 times, MIX
H
L
H
H
H
H
L
Forward, 2/5 times, SLOW
H
L
H
L
L
H
L
Forward, 1/5 times, FAST
H
L
H
L
M
H
L
Forward, 1/5 times, MIX
H
L
H
L
H
H
L
Forward, 1/5 times, SLOW
Reverse, 2/5 times, FAST
H
H
H
H
L
L
H
H
H
H
H
M
L
H
Reverse, 2/5 times, MIX
H
H
H
H
H
L
H
Reverse, 2/5 times, SLOW
Reverse, 1/5 times, FAST
H
H
H
L
L
L
H
H
H
H
L
M
L
H
Reverse, 1/5 times, MIX
H
H
H
L
H
L
H
Reverse, 1/5 times, SLOW
L
H
H
H
L
L
L
Brake, 2/5 times, FAST
L
H
H
H
M
L
L
Brake, 2/5 times, MIX
L
H
H
L
L
L
L
Brake, 1/5 times, FAST
L
H
H
L
M
L
L
Brake, 1/5 times, MIX
L
H
H
X
H
L
L
L
L
H
X
X
OFF
OFF
Output OFF
X
X
L or OPEN
X
X
OFF
OFF
Standby mode (circuit OFF)
Except for MD pin, Low at input OPEN.
Brake, no current limiting
MD M: determined by external voltage.
No.6192-4/9
LB1947
Pin Function
Pin No.
1
Pin name
Function
Output pin.
3
OUTA
OUTA
2
E
Sense voltage control pin.
4
VI
High: sense voltage is 2/5 of VREF
Equivalent circuit
VCC
Low: sense voltage is 1/5 of VREF
100µA
5
ST
High: circuit operation ON
Low: standby mode
8
IN1
50kΩ
High: rotation mode
Low: brake mode
9
IN2
High: reverse mode
4
VI
40kΩ
Low: forward mode
6
VBB
7
VCC
Motor power supply voltage.
Logic power supply voltage.
10
VREF
Output current setting reference pin.
VCC
Setting range: 0 to (VCC−2V)
5µA
3s
1s
40kΩ
10
VREF
11
CR
Oscillator with self-excitation.
12
MD
Current attenuation switching pin.
Low : FAST DECAY
High: SLOW DECAY
M : MIX DECAY
M is set by external power supply voltage.
Range : 1.1 to 4.0V
13
GND
Ground pin
No.6192-5/9
LB1947
Sample Application Circuits
1. Forward/reverse motor with current limiter
24V
M
*Schottky barrier type for external diodes.
OUTA
OUTA
3
MD
IN1
IN2
ST
VI
VREF
7
VCC
5V
8
Control
logic
9
circuit
5
4
Thermal
shutdown circuit
UVLO
10
One-shot
multiblanking
time
13
11
CR
RE
2
E
I = VREF/ (5 × RE)
Limiter current setting method
IN1
VBB
6
12
Current
select
circuit
GND
1
IN2
ST
OUTA
OUTA
Mode
H
L
H
H
L
Forward
H
H
H
L
H
Reverse
L
H
H
L
L
Brake
L
L
H
OFF
OFF
Output OFF
−
−
L
OFF
OFF
Standby mode
No.6192-6/9
LB1947
2. Forward/reverse motor
24V
M
*Schottky barrier type for external diodes.
OUTA
OUTA
3
MD
IN1
IN2
ST
VI
VREF
VBB
6
12
7
VCC
5V
8
Control
logic
9
circuit
5
4
Thermal
shutdown circuit
UVLO
10
Current
select
circuit
GND
1
One-shot
multiblanking
time
13
11
CR
IN1
IN2
ST
OUTA
OUTA
H
L
H
H
L
Forward
Reverse
2
E
Mode
H
H
H
L
H
L
H
H
L
L
L
L
H
OFF
OFF
Output OFF
−
−
L
OFF
OFF
Standby mode
Brake
No.6192-7/9
LB1947
3. PWM current control forward/reverse motor (MIX DECAY)
24V
M
*Schottky barrier type for external diodes.
OUTA
OUTA
3
MD
IN1
IN2
ST
VI
VREF
RE
VBB
6
12
7
VCC
5V
8
9
Control
logic
circuit
5
4
Thermal
shutdown circuit
UVLO
10
Current
select
circuit
GND
1
One-shot
multiblanking
time
13
11
CR
2
E
No.6192-8/9
LB1947
Notes on Usage
1. VREF pin
Because the VREF pin serves for input of the set current reference voltage, precautions against noise must be taken.
2. GND pin
The ground circuit for this IC must be designed so as to allow for high-current switching. Blocks where high current
flows must use low-impedance patterns and must be removed from small-signal lines. Especially the ground
connection for the sensing resistor RE at pin E, and the ground connection for the Schottky barrier diodes should be in
close proximity to the IC ground.
The capacitors between VCC and ground, and VBB and ground should be placed close to the VCC and VBB pins,
respectively.
3. CR pin setting (Switching off time, Noise cancel time)
The noise cancel time (Tn) and the switching off time (Toff) are set by the following expressions:
Noise cancel time: Tn ≈ C × R × ln {(1.0 − RI) / (4.0 − RI) [sec]
CR charge current: 1.3mA
Switching off time: Toff ≈ −C × R × ln (1.0 / 4.8) [sec]
Internal configuration at CR pin
VCC line
One-shot multi-blanking
time circuit
E1
C:1000pF
R:5.1kΩ
CR constant range: R = 4.7k to 100kΩ
C = 330pF to 2200pF
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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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semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise
to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt
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limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
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product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
SANYO Semiconductor Co.,Ltd. product that you intend to use.
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 February, 2009. Specifications and information herein are subject
to change without notice.
PS No.6192-9/9