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P82CF201

Features: • Temperature proportional fan speed control resulting in low acoustic and longer fan life• 3.0 V to 5.5 V operating range• Dual PWM fan drive• Constant temperature monitoring ensure reliable motor start-up at turn-on, coming out of fault condition, or following a...

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SeekIC No. : 004453654 Detail

P82CF201: Features: • Temperature proportional fan speed control resulting in low acoustic and longer fan life• 3.0 V to 5.5 V operating range• Dual PWM fan drive• Constant temperature...

P82CF201 Data Sheet

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Part Number:
P82CF201
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

• Temperature proportional fan speed control resulting in low
  acoustic and longer fan life
• 3.0 V to 5.5 V operating range
• Dual PWM fan drive
• Constant temperature monitoring ensure reliable motor start-up at
  turn-on, coming out of fault condition, or following a transient fault
• Constant fan sensing protect against fan failure and fault condition
• Over temperature and fan fail output pin
• 20 mA direct drive to LED indicators for fan power supply failure,
  fan failure, overheat warning, no fan connect
• 500 mS turn-on delay for the second fan when both fans have to
  turn-on, reducing high surge current and noise
• On-chip power-on reset allows operation with no external components
• The watchdog timer performs self-check and reset function
• On-chip oscillator allows operations with no external oscillator components
• Supports low cost NTC thermistors (for PTC use P82CF202)
• Hysteresis control (when THRESHOLD pin is connected to
  Vss/Ground) for resistance between 10K (25 °C) and 15K (20 °C)
  during cooling to avoid unnecessary fan turning during cool down
• Constant cooling (when THRESHOLD pin is not connected or tied
  to VDD) for resistance above 10K
• Maximum PWM is asserted when one fan fails, cooling the system
  during fan failure
• 20-pin TSSOP package.


Pinout

Connection Diagram


Specifications

PARAMETER RATING
Operating temperature under bias 55 to +125
Storage temperature range 65 to +150
Voltage on any other pin to VSS 0.5 to +5.5V
Maximum IOL per I/O pin 20
Power dissipation (based on package heat transfer limitations, not device power consumption)

1.5

NOTES:
1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any conditions other than those described in the AC and DC Electrical Characteristics section
of this specification are not implied.
2. This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive static
charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated maximum.
3. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless otherwise
noted.
4. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless otherwise
noted.


Description

The P82CF201 is a 20-pin single-chip dual digital fan controller designed for use with brushless DC fan motors. A thermistor (or temperature resistive sensor) connected to the RthermC input provides the required resistance of 10K to 1.75 KW for 30% to 98% PWM duty cycle.

With temperature less than 25 °C (thermistor resistance more than 10 KW) and THRESHOLD is set to LOW, the fan will be off. When temperature rises above 25 °C (NTC thermistor at 10K or less), the PWM turns the fan on. The P82CF201 features a Turn-on Delay for a second fan when both fans have to turn-on. P82CF201 reduces the in-rush current and suppresses acoustic noise.

The P82CF201 also features fan fault sensing for enhancing system protection and reliability. It detects the presence of a fan, when the running fan fails or jams using the voltage on VSENSE pin and asserts the fault signal. The fault condition also triggers the maximum PWM applied to the running fan. The fault is also asserted when the thermistor resistance is less than 1.5 KW (temperature is over 76 °C).




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