AN36 ZXBM200x Series of Variable Speed
2-Phase Fan Motor Controller - Zetex Semiconductors
Applications Note: This applications document is intended to aid users in ir development of controller
electronics for fan and blower motors using ZXBM200x series of variable speed, 2-phase, DC brushless motor
controllers. . . .
AN-612: ADT7463 Configurations
- AN-612 Analog Devices Application Note . . .
Programming the Automatic Fan Speed Control Loop - AN-613
Analog Devices Application Note . . .
Noise Filtering & the ADT7461 - AN-699 Analog Devices
Application Note . . .
AN-702: Using the ADT7461 as a Multichannel Temperature Sensor - AN-702 Analog Devices Application Note . . .
AN764: Implementing Temperature-Based Variable Fan Speed Control in Nlx Power
Supplies - Application Note Published 4-Feb-03 . . .
AN767: Interfacing Microchip’s Fan Speed Controllers to a SPI? - Application Note Published 12-Nov-02 . . . [Microchip]
AN768: Redundant Fan Systems using the TC647 Fan Manager - Application Note Published 4-Feb-02 . . . [Microchip]
AN770: Linear Voltage Fan Speed Control using Microchip's TC64x Family TC642, TC646,
TC648 - Application Note Published 27-Jul-04 . . .
Suppressing Acoustic Noise in PWM Fan Speed Control Systems
- Application Note Published 27-Jul-04 . . . [Microchip]
AN-772: A Design & Manufacturing Guide for the Lead Frame Chip Scale Package - AN-772 Analog Devices Application Note . . .
AN772: Speed Error in PWM Fan Control Systems TC646, TC647, TC649 - Application Note Published 27-Jul-04 . . . [Microchip]
Amp makes efficient fan controller - 11/09/00 EDN Design
Idea You can use discrete transistors to vary power to a fan to control its speed. However, with a simple
modification, you can use an audio-amplifier IC to control a fan module (Figure 1). The LM4872. PDF contains
multiple circuits, sc. . . [by Wallace Ly, National Semiconductor Corp, Santa Clara, CA]
Temperature Controlled Fan - This is a circuit that can
linearly control the speed of a fan depending on the temperature of the room. . . . [© EFY Enterprises Pvt. Ltd.
All rights reserved.]
Autonomous Fan Control for Processor Systems
using the LM85 - Application Note . . . [National
Boost converter controls 12V fan from 5V supply - 12/12/97 EDN Design Idea Temperature-controlled PWM boost converter allows operation of
a12V brushless dc fan from a5V supply. . . . [by John McNeill, Worcester Polytechnic Institute, Worcester, MA]
Car Fan Speed
Controller - Using this circuit you can control the speed
of 12V DC fans used in cars. The circuit is built around timer 555, which is wired as an astable multivibrator.
The output of the multivibrator is fed to IRF 540 MOSFET. The fan is connected between the positive terminal of
the battery and drain (D) of MOSFET T1. Capacitor C1 is connected in parallel to the fan to stabilise its speed.
Free-wheeling diode D1 protects the motor from back emf. A fuse is included for protection. . . . [© EFY
Enterprises Pvt. Ltd. All rights reserved.]
Control - Ceiling Fan Speed Control - For one of those 3
or 4 blade decorative fans. . . . [Reverse engineered schematic by Stepan Novotill]
Circuit Generates Analog Fan
Speed Control - Maxim-IC Appnote #1125 This circuit
delivers a continuous and linear fan-control voltage that is proportional to temperature. . . . [Maxim
Circuit protects system from overheating - 11/08/01 EDN
Design Idea The two-chip circuit in Figure 1 provides fan control and overtemperature warning and shutdown
signals to protect systems from excessive heat. The circuit monitors the temperature of the pc board and the die
temperature of a CPU, an. . . [by Kerry Lacanette, Maxim Integrated Products, Sunnyvale, CA]
Circuit provides efficient fan-speed control - 03/04/04
EDN Design Idea As Moore's Law plunges us into the realm of multigigahertz processors and PCs with gigabytes of
RAM, engineers face the task of removing the heat that these state-of-the-art components produce. Cooling such
systems poses a dilemma. . . . [by John Guy, Maxim Integrated Products, Sunnyvale, CA]
Computer fan speed tacho out circuit - Add a fan speed monitor lead to any 12V two wire fan. You will find this identical circuit
inside most 3 wire computer fans with speed monitoring output to the motherboard. Peel off the sticker from the
fan hub in order to access a motor winding pin for connecting up the tacho circuit. . . [Circuit by Stepan
Cooling Fan Controller - As we begin to enjoy those lazy hazy days of summer, the most important thing on most of our
minds is how to keep cool during those hot days. For some of us that means turning up the old air conditioner and
sipping on a nice cold glass of our favorite soft drink. However, we often forget about an equally important. .
. [Radio Amateur Society of Norwich]