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LB11961V

Single-Phase Full-Wave Fan Motor Driver

ON Semiconductor 

Ordering number : EN8794B

LB11961V

Monolithic Digital IC

Single-Phase Full-Wave

Fan Motor Driver

http://onsemi.com

Overview

The LB11961V is a single-phase bipolar drive motor driver that easily implements direct PWM motor drive systems

with excellent efficiency. The LB11961V is optimal for fan motor drive in personal computer power supply systems

and CPU cooling fan systems.

Features

• Single-phase full-wave drive (16V, 1.0A transistors are built in)

• Built-in variable speed function controlled by a thermistor input

The LB11961V can implement quiet, low-vibration variable speed control using externally clocked high side

transistor direct PWM drive.

• Built-in regenerative diode (Di); only requires a minimal number of external components.

• Built-in HB

• Minimum speed setting pin (allows full-speed mode operation at startup)

• Operates in full-speed mode when the thermistor is removed.

• Built-in lock protection and automatic recovery circuits

• FG (speed detection) and RD (lock detection) outputs

• Built-in thermal shutdown circuit

Semiconductor Components Industries, LLC, 2013

May, 2013

92111 SY 20110915-S00002/31407 TI PC 20070206-S0006 No.8794-1/7

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