SANYO LB1855NM Datasheet

Overview

The LB1855NM is a 3-phase brushless motor driver IC
that is optimal for VCR drum motor drive.

Features

• Current linear drive

• No output electrolytic capacitors required.

• Current limiter circuit built in

• AGC circuit built in

• Thermal shutdown circuit built in

Package Dimensions

unit: mm

3097-MFP16FS

Monolithic Digital IC

O3098RM (OT) No. 5798-1/5

SANYO: MFP16FS

[LB1855NM]

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

3-Phase Brushless Motor Driver

LB1855NM

Ordering number : EN5798

On the specified printed circuit board (a 20 × 30 × 1.5 mm glass3epoxy board)

Ambient temperature, Ta — °C

Allowable power dissipation, Pd max — W

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

CC

max 20 V

Maximum output current I

O

max 1.2 A

Allowable power dissipation Pd max

On the specified printed circuit board (a 20 × 30 × 1.5 mm

3

1.2 W

glass epoxy board)
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –55 to +150 °C

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Supply current V

CC

7 to 18 V

Hall input amplitude V

HALL

Between the Hall inputs 70 to 300 mVp-p

Allowable Operating Ranges at Ta = 25°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.

No. 5798-2/5

LB1855NM

Parameter Symbol Conditions

Ratings

Unit

min typ max

Supply current I

CC

VC= GND 8 mA

Reference voltage V

REFIR

= 8 mA 6.0 6.3 6.6 V

[Saturation voltage]

Upper side V

sat

1 IO= 1 A 1.5 1.9 V

Lower side V

sat

2 IO= 1 A 0.8 1.2 V

[Leakage current]

Upper side I

OL

1 VCC= 18 V 50 µA

Lower side I

OL

2 VCC= 18 V 50 µA

[Hall Amplifier]

Input offset voltage V

HO

* –10 +10 mV

Common-mode input voltage range V

HCM

2.2 VCC– 0.7 V

[Control Amplifier]

Control reference voltage V

REF

1 (the V

CREF

pin voltage) × 23/16 2.1 2.3 2.5 V
Control Gm VG Rf = 1Ω 1 A/V
Input current I

IN

10 µA

[Thermal Shutdown Circuit]

Operating temperature T

TSD

* 180 °C

Hysteresis ∆T

TSD

* 15 °C

Note: Items marked with an asterisk (*) are design target values and are not tested.

However, note that certain motors may require output capacitors to prevent oscillation.

Pin Assignment

Block Diagram

Electrical Characteristics at Ta = 25°C, VCC= 12 V