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PDF P82CF201 Data sheet ( Hoja de datos )
| Número de pieza | P82CF201 | |
| Descripción | Low power / low price dual fan manager | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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INTEGRATED CIRCUITS
P82CF201
Low power, low price dual fan manager
Product data
Supersedes data of 2002 Nov 04
2002 Nov 18
Philips
Semiconductors
1 page  
Philips Semiconductors
Low power, low price dual fan manager
Product data
P82CF201
Motor Failure Detection and fault Reporting
(including watchdog reset)
As shown in Figure 4, the VSENSE input is connected to the collector
of NPN transistor through an inverting buffer transistor (2N3904 or
PMBT3904D) which amplifies the signal from the low-value current
sensing resistor in the ground return leg of the fan circuit. During
normal fan operation, communication occurs as each pole of the fan
is energized.
The fan current develops across the sense resistor(RSENSE). This a
voltage follower of the PWM pin.
In a running motor, a current will flow through the resistor RSENSE
resulting in a voltage drop. The commutation will cause a narrow
window where there is no current flow. Motor detection is done by
the presence of commutation pulses. If there is constant voltage
level on the VSENSE pin when the motor is driven by a PWM signal,
the motor is jammed. When there is no voltage at all, the motor
might not be connected or the MOSFET is defective. The fault
condition also triggers the maximum PWM applied to the running
fan.
To detect the commutation pulses correctly, the VSENSE input needs
a logic high level of 0.2*VDD+0.9 V. (For example:
1.56 V@VDD=3.3 V). The design of proper sense circuitry is a
matter of scaling the RSENSE and the gain in buffer transistor to
meet the logic high as shown in Figure 4. Assuming the VBE(min) of
the transistor is approx. 0.5 V. Table 1 lists some recommended
RSENSE values according to the nominal operating current.
Table 1. Recommended values of RSENSE per
Figure 4
Nominal Fan Current(mA)
100
200
450
800
Min RSENSE(ohms)
5.1
2.5
2.2
1.0
In addition, when the thermistor resistance falls below 1.7 KΩ (for
NTC thermistor) indicating temperature above 76 °C, the fault line
will be asserted.
When the fan fails continuously, the fault signal will be held on LOW.
3.3 V
+12 V
+12 V
12 V FAN
FANXDRIVE
Q1
SI4410DY
3.3 V
VSENSEx
RSENSE
(2.2 Ω TYPICAL)
Figure 4. Interfacing the 82CF201 to a 2-Wire fan.
su01720
2002 Nov 18
5
5 Page 
Philips Semiconductors
Low power, low price dual fan manager
Product data
P82CF201
Data sheet status
Level
Data sheet status [1]
Product
status [2] [3]
I Objective data
Development
Definitions
This data sheet contains data from the objective specification for product development.
Philips Semiconductors reserves the right to change the specification in any manner without notice.
II Preliminary data
Qualification
This data sheet contains data from the preliminary specification. Supplementary data will be published
at a later date. Philips Semiconductors reserves the right to change the specification without notice, in
order to improve the design and supply the best possible product.
III Product data
Production
This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply. Relevant
changes will be communicated via a Customer Product/Process Change Notification (CPCN).
[1] Please consult the most recently issued data sheet before initiating or completing a design.
[2] The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL
http://www.semiconductors.philips.com.
[3] For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see
the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting
values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given
in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no
representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be
expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree
to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes in the products—including circuits, standard cells, and/or software—described
or contained herein in order to improve design and/or performance. When the product is in full production (status ‘Production’), relevant changes will be communicated
via a Customer Product/Process Change Notification (CPCN). Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys
no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent,
copyright, or mask work right infringement, unless otherwise specified.
Contact information
For additional information please visit
http://www.semiconductors.philips.com.
Fax: +31 40 27 24825
For sales offices addresses send e-mail to:
© Koninklijke Philips Electronics N.V. 2002
All rights reserved. Printed in U.S.A.
Document order number:
Date of release: 11-02
9397 750 10751
Philips
Semiconductors
2002 Nov 18
11
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| PDF Descargar | [ Datasheet P82CF201.PDF ] | |
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