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PDF LB1939T Data sheet ( Hoja de datos )
| Número de pieza | LB1939T | |
| Descripción | 2 Channel H Bridge Constant Voltage/ Constant Current Driver IC | |
| Fabricantes | Sanyo Semicon Device | |
| Logotipo |  |
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Ordering number : ENN6194
Monolithic Digital IC
LB1939T
2 Channel H Bridge Constant Voltage/
Constant Current Driver IC
Overview
The LB1939T is a two-phase excitation bipolar stepping
motor driver that features low voltage operation, a low
saturation voltage, and low power consumption. It
supports constant voltage and constant current drive, can
control two iris motors, and is optimal for shutter, iris, and
AF drive in 3 V battery operated still digital cameras and
other battery operated equipment.
Features
• Low-voltage drive
— Dual power supply operation: VS = 1.6 to 7.5 V,
VDD = 1.9 to 6.5 V
— Single power supply operation: VS = VDD = 1.9 to
7.5 V
• Low saturation voltage output: Vosat = 0.3 V at IO =
200 mA
• Supports constant voltage and constant current drive
• Built-in reference voltage circuit (Vref = 0.9 V)
• Miniature, thin form package (Thickness t = 1.1 mm)
Package Dimensions
unit: mm
3246-TSSOP20
[LB1939T]
6.5
20 11
1
0.65
(0.33)
0.22 10
0.15
SANYO: TSSOP20
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Maximum supply voltage
Applied output voltage
Maximum output current: OUT1, 2, 3, and 4
Applied input voltage
Allowable power dissipation
VBmax
VOUT
IOmax
VIN
Pdmax
VS1, VS2, VDD
OUT1, 2, 3, 4
t ≤ 10 ms
ENA, IN, VC
When mounted on a printed circuit board*
Operating temperature
Topr
Storage temperature
Tstg
Note: Circuit board: 114.3 × 76.1 × 1.6 mm3 glass epoxy board
Ratings
–0.3 to +10.5
–0.3 to +10.5
400
10.5
0.8
–20 to +85
–55 to +150
Unit
V
V
mA
V
W
°C
°C
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using 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 products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
22704TN (OT) No. 6194-1/7
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
Application Circuit Example 1
LB1939T
CPU
VDD VS2 VS1
ENA1
ENA2
IN1
IN2
S-GND
LB1939T
OUT1
OUT2
OUT3
OUT4
SVDD
Vref VC1 VC2 RFG1 RFG2
Constant voltage control mode: OUT outputs a 1.75 V, which is Vref (0.9 V) × 1.95.
* : FC1 and FC2 are left open.
Application Circuit Example 2
CPU
VDD VS2 VS1
ENA1
ENA2
IN1
IN2
LB1939T
OUT1
OUT2
OUT3
OUT4
S-GND
FC1
SVDD
FC2
Vref VC1 VC2 RFG1 RFG2
Constant current control mode: The RFG voltage is controlled so that Vref/4.5 = 0.2 V.
Therefore, when RfB is 1 Ω, the circuit operates in constant current drive with Icoil = 0.2 V/1 Ω = 200 mA.
*: There are no magnitude constraints on the inputs (ENA, IN) and the supply voltages (VDD, VS).
For example, the IC can be operated at VIN = 5 V, VDD = 3 V, and VS = 2 V.
No. 6194-5/7
Datasheet pdf - http://www.DataSheet4U.net/
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet LB1939T.PDF ] | |
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