FAN8460MTC Datasheet, PDF (1/22 Pages) Fairchild Semiconductor – Single Phase Full Wave BLDC Motor Driver with Variable Speed Control

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FAN8460MTC/FAN8460MP
Single Phase Full Wave BLDC Motor Driver with
Variable Speed Control
Features
• Output direct PWM drive for speed control
• Selectable PWM frequency : internal or external
• Versatile speed control inputs: A thermistor or PWM
input.
• A wide range of operating voltage: 3.2V to 28V
• Locked rotor protection with open collector output and
auto retry
• Open collector hall output for speed feedback
• Adjustable minimum speed
• Thermistor disconnection protection
• TSD protection.
Description
The FAN8460MTC/FAN8460MP is a single phase BLDC
motor driver with variable speed control using output direct
PWM method and it’s typical application is DC cooling fans
with wide range of supply voltage(5/12/24V). This approach
eliminates the need for external pass devices such as BJT,
MOSFET. This solution also offers other advantages over
commonly used external PWM turning fan’s power on and
off at fixed frequency. The external PWM increas stress on
fan and needs level translation in speed and alarm output
because these outputs share the fan’s negative terminal.
In case of CPU cooling, digital controller can give speed
control command with PWM signal adjusting the duty. If a
system has no digital controller, the NTC thermistor input
mechanism can control fan speed with local or ambient tem-
perature sensing.These two kinds of input schemes can meet
various system requirements and applications.
14-TSSOP
14-MLP 4X4
Typical Applications
• CPU Cooling Fans
• Instrumentation Fans
• Desktop PC Fans
Ordering Information
Device
FAN8460MTC
FAN8460MTCX
FAN8460MPX
Package
14-TSSOP
14-TSSOP
14-MLP 4x4
Operating Temp.
−30°C ~ 90°C
−30°C ~ 90°C
−30°C ~ 90°C
©2004 Fairchild Semiconductor Corporation
Rev.1.0.3