TC649 Microchip, TC649 Datasheet

no-image

TC649

Manufacturer Part Number
TC649
Description
PWM Fan Speed Controller
Manufacturer
Microchip
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TC649BEOA
Manufacturer:
MICROCHIP
Quantity:
12 000
Part Number:
TC649BEOA713
Manufacturer:
MICROCHIP
Quantity:
12 000
Part Number:
TC649BEOATR
Manufacturer:
Microchi
Quantity:
3 300
Part Number:
TC649BEPA
Manufacturer:
MICROCHIP
Quantity:
12 000
Part Number:
TC649BEUA
Manufacturer:
MICROCHIP
Quantity:
12 000
Part Number:
TC649BUA
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
Part Number:
TC649EOA
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
Part Number:
TC649VOA-TR
Quantity:
715
Part Number:
TC649VOATR
Quantity:
715
Features
• Temperature Proportional Fan Speed for Acoustic
• Efficient PWM Fan Drive
• 3.0V to 5.5V Supply Range:
• FanSense™ Fault Detection Circuits Protect
• Automatic Shutdown Mode for “Green” Systems
• Supports Low Cost NTC/PTC Thermistors
• Space Saving 8-Pin MSOP Package
Applications
• Power Supplies
• Computers
• File Servers
• Portable Computers
• Telecom Equipment
• UPSs, Power Amps
• General Purpose Fan Speed Control
Available Tools
• Fan Controller Demonstration Board (TC642DEMO)
• Fan Controller Evaluation Kit (TC642EV)
M
Control and Longer Fan Life
- Fan Voltage Independent of TC649
- Supports any Fan Voltage
Against Fan Failure and Aid System Testing
2002 Microchip Technology Inc.
Supply Voltage
PWM Fan Speed Controller with Auto-Shutdown
and FanSense™ Technology
Package Types
General Description
The TC649 is a switch mode, fan speed controller for
use with brushless DC fans. Temperature proportional
speed control is accomplished using pulse width mod-
ulation (PWM). A thermistor (or other voltage output
temperature sensor) connected to the V
nishes the required control voltage of 1.25V to 2.65V
(typical) for 0% to 100% PWM duty cycle. The TC649
automatically suspends fan operation when measured
temperature (V
minimum setting (V
ensures reliable motor start-up at turn-on, coming out
of shutdown mode, auto-shutdown mode or following a
transient fault.
In normal fan operation, a pulse train is present at
SENSE (Pin 5). The TC649 features Microchip
Technology’s proprietary FanSense
increasing system reliability. A missing pulse detector
monitors this pin during fan operation. A stalled, open
or unconnected fan causes the TC649 to trigger its
Start-up Timer once. If the fault persists, the FAULT
output goes low, and the device is latched in its shut-
down mode. See Section 5.0, “Typical Applications”,
for more information and system design guidelines.
The TC649 is available in the 8-pin PDIP, SOIC and
MSOP packages and is available in the industrial and
extended commercial temperature ranges.
SOIC/PDIP/MSOP
GND
V
V
C
AS
IN
F
1
2
3
4
IN
) is below a user programmed
AS
TC649
). An integrated Start-up Timer
TC649
TM
DS21449C-page 1
8
7
6
5
technology for
V
V
FAULT
SENSE
IN
DD
OUT
input fur-

Related parts for TC649

Related keywords