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Ordering number : EN7101
Monolithic Digital IC
LB1943N
Overview
VCR Loading Motor
Variable Output Forward/Reverse Motor Driver
The LB1943N is a variable output forward/reverse motor driver that is optimal for driving motors such as the loading motor in VCR decks.
Functions
* Variable output forward/reverse motor driver * Built-in thermal protection circuit * Built-in reference voltage circuit (6.35V, typical)
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Maximum input voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VIN max IOUT max Pd max Topr Tstg VCC >VIN Conditions Ratings 18 -0.3 to +6 1.6 1.2 -25 to +75 -55 to +125 Unit V V A W C C
Allowable Operating Range at Ta = 25C
Parameter Supply voltage range Symbol VCC1 VCC2 Forward to reverse operation disallowed period Toff VCC1 VCC2 Conditions Ratings 8.0 to 18 5 to 18 20 or more Unit V V s
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.
40407 TI PC B8-4954 No.7101-1/6
LB1945D
Electrical Characteristics at Ta = 25C, VCC = 12V
Parameter Low-level input voltage High-level input voltage Mid-level input voltage Intput impedance Current consumption Output voltage 1 Output voltage 2 Output leakage current Saturation voltage (high side) Symbol VIN L VIN H VIN M ZIN ICC VOUT1 VOUT2 IO L V sat11 V sat12 Saturation voltage (low side) V sat21 V sat22 Reference supply voltage Reference voltage load characteristics Control to output gain Thermal shutdown temperature TTSD VOUT/VC, VC = 2.5V RL = 60 Design target* 1.5 150 1.9 180 2.4 Time C Vref Vref/Iref Iref = 0mA to -2.0mA RL = 60, VC = 2.5V, VIN1 = 2.5V, VIN2 = 0V RL = 60, VC = 2.5V, VIN1 = 2.5V, VIN2 = 5.0V RL = VCC = 12V, IOUT = 300mA VCC = 12V, IOUT = 500mA VCC = 12V, IOUT = 300mA VCC = 12V, IOUT = 500mA 6.0 4.4 4.4 Conditions min 0 4.2 2.0 75 5.5 4.95 4.95 0.01 1.9 1.9 0.25 0.4 6.35 0.05 10 5.4 5.4 1.0 2.2 2.3 0.5 0.65 6.8 0.1 Ratings typ max 1.0 6.0 3.0 V V V k mA V V mA mV V V V V V/mA Unit
*: The design specification items are design guarantees and are not measured.
Package Dimensions
unit:mm (typ) 3043C
1.4
Pd max - Ta
Tj = 125C
24.0
3.25
Allowable power dissipation, Pd max - W
1.2
1.0
7.7MAX
(6.5)
0.8
1.1
1 (0.62) 2.54 1.2 0.5
10 0.25 1.5
4.9
0.6
0.4
0.2 0 -40
SANYO : SIP10
-20
0
20
40
60
80
100
Ambient temperature, Ta - C
Pin Assignment
LB1943N
OUT1 VCC1 OUT2 VCC2 GND Vref IN1 IN2 NC VC
Top view
1
2
3
4
5
6
7
8
9
10
No.7101-2/6
LB1945D
Block Diagram
10 9 OUT2 VCC2 2 OUT1 8 VCC1 Thermal shutdown circuit
Predriver
Reference voltage circuit
Vref 7
VC 6 Logic circuit
NC 5
GND 1
IN1 3 4
IN2
Application Circuit Example
VCC = 12V
No.7101-3/6
LB1945D
Truth Table
Input IN1 H M L H M L H M L IN2 H H H M M M L L L OUT1 L L L off off off Full VC x 2 VC x 2 Output voltage OUT2 Full VC x 2 VC x 2 off off off L L L Operation Forward (reverse) mode Forward (reverse) mode Forward (reverse) mode Break Break Break Reverse (forward) mode Reverse (forward) mode Reverse (forward) mode
H: high level, M: mid level, L: low level
Input levels
VH: 4.2V or higher VM: 2.0V to 3.0V VL: Under 1.0V When IN1 or IN2 is open, that input will go to the 2.5V level. Operation is equivalent to that of the LB1641.
Pin Functions
Pin No. 1 3 Pin GND IN1 Description * Common ground for the power signal systems * Output voltage switching input * When the input is open, VM will become about 2.5V. Equivalent Circuit
VCC1 25A 75k
6.4V 19k
3
13k GND
4
IN2
* Forward/reverse/brake switching input * When the input is open, VM will become about 2.5V.
VCC1 25A 75k
6.4V 19k
4
13k GND
Continued on next page.
No.7101-4/6
LB1945D
Continued from preceding page. Pin No. 6 Pin VC Description * Output voltage setting Equivalent Circuit
VCC1
6
GND
7
Vref
* Reference voltage output Vref = 6.4V
VCC1
7
GND
8 9 2 10
VCC1 VCC2 OUT1 OUT2
* Signal system power supply * Power system power supply * Motor coil connection
VCC2
10 OUT2
260
260
2 OUT1
GND
No.7101-5/6
LB1945D
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This catalog provides information as of April, 2007. Specifications and information herein are subject to change without notice. PS No.7101-6/6

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