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Publication Order Number :

LB1860_60M_61_61M/D

www.onsemi.com

© Semiconductor Components Industries, LLC, 2014

August 2014 - Rev. 0

ORDERING INFORMATION

See detailed ordering and shipping information on page 8 of this data sheet.

LB1860, LB1860M,

LB1861, LB1861M

Overview

The LB1860 series ICs are drivers for two-phase unipolar drive DC

brushless fan motors. They have functions such as driving, lock

protection, restart and speed control.

Features

 Two-speed mode select function requiring less external component

additions : Full speed and Low speed. Or, thermistor-controlled

continuous variable-speed function according to ambient operation

temperatures.

Motor starts rotating at a low speed.

 Motor lock protection and automatic return circuit built in

 Output transistors: Output current IO = 1.5 A, output circuit protection

Zener diodes

(LB1860 : M-Vz = 57 V/ LB1861: M-Vz = 32 V)

Enables low-level noise protection with chip capacitor.

 Built-in thermal shutdown circuit Built-in rotation detect function

(Drive mode: ‘‘L’’, Stop mode: ‘‘H’’)

 The LB1860 series can be operated from either 12 V or 24 V power

supply by changing an external resistor.

(Strong protection against power supply surge)

 Connectable direct to a Hall element

Monolithic Digital IC

Two-Phase Half-Wave

Variable Speed

Fan Motor Driver

PDIP10 / DIP10S (300 mil)

[LB1860, LB1861]

SOIC14 W / MFP14S (225 mil)

[LB1860M, LB1861M]