LB1939T_09 SANYO [Sanyo Semicon Device], LB1939T_09 Datasheet

LB1939T_09

Manufacturer Part Number

LB1939T_09

Description

2 Channel H Bridge Constant Voltage/Constant Current Driver IC

Manufacturer

SANYO [Sanyo Semicon Device]

Datasheet

1.LB1939T_09.pdf (7 pages)

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Ordering number : ENN6194

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

• Low saturation voltage output: Vosat = 0.3 V at I

• 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)

Specifications

Absolute Maximum Ratings at Ta = 25°C

Note: Circuit board: 114.3

Maximum supply voltage

Applied output voltage

Maximum output current: OUT1, 2, 3, and 4

Applied input voltage

Allowable power dissipation

Operating temperature

Storage temperature

— Dual power supply operation: VS = 1.6 to 7.5 V,

— Single power supply operation: VS = V

200 mA

7.5 V

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

= 1.9 to 6.5 V

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.

Parameter

SANYO Electric Co.,Ltd. Semiconductor Company

76.1

1.6 mm

glass epoxy board

Symbol

Pdmax

Topr

Omax

Tstg

Bmax

OUT

VS1, VS2, V

OUT1, 2, 3, 4

t ≤ 10 ms

ENA, IN, VC

When mounted on a printed circuit board*

= 1.9 to

2 Channel H Bridge Constant Voltage/

Package Dimensions

unit: mm

3246-TSSOP20

Conditions

(0.33)

0.65

Constant Current Driver IC

6.5

[LB1939T]

0.22

22704TN (OT) No. 6194-1/7

–0.3 to +10.5

Monolithic Digital IC

–55 to +150

–20 to +85

Ratings

LB1939T

SANYO: TSSOP20

10.5

400

0.8

0.15

Unit

°C

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LB1939T_09 Summary of contents

Page 1

Ordering number : ENN6194 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 ...

Page 2

Allowable Operating Conditions 25°C Parameter Operation guaranteed voltage range 1 Operation guaranteed voltage range 2 Input low-level threshold voltage Input high-level threshold voltage Electrical Characteristics 25° 3 Parameter Symbol Standby ...

Page 3

Truth Table Input ENA Blank entries indicate “don’t care” states. Pin Assignment S-GND LB1939T Output OUT Blank entries ...

Page 4

Block Diagram LB1939T No. 6194-4/7 ...

Page 5

Application Circuit Example 1 CPU Application Circuit Example 2 CPU Constant current control mode: The RFG voltage is controlled so that Vref/4.5 = 0.2 V. Therefore, when RfB the circuit operates in constant current drive with Icoil ...

Page 6

Application Circuit Example 3 CPU Channel 1 operates in constant voltage control mode: OUT outputs V Channel 2 operates in constant current control mode: The RFG voltage is controlled so that Vref/4 FC1 is left ...

Page 7

Constant Current Control Usage Notes This IC supports both constant current control and constant voltage control modes. However, since both of these control circuits operate at all times, certain of the limitations imposed by the constant voltage control circuit apply ...

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