VARIABLE SPEED 12-VDC BRUSHLESS FAN MOTOR DRIVERS

The THMC40 and THMC41 are 2-phase, dc brushless motor (BLM) drive and control devices intended for use with 12-Vdc cooling fans. Both devices include a high-efficiency PWM drive topology using integrated 0.5- (typical) LDMOS drivers, plus a speed control input stage to provide the industrys first solution for efficient speed control inside dc cooling fans. This patented solution eliminates the need for power drive components on the main system board, thus reducing printed-circuit board (PCB) component count, PCB space, and assembly time. This solution also offers other advantages over the two commonly used fan speed control methods, adjustable external dc supply voltage, and adjustable external PWM drive duty cycle. Unlike other methods which control speed external to the cooling fan, the THMC40 and THMC41 high-efficiency PWM drive stage adjusts only the level of motor phase winding power. All other circuitry inside the fan obtains power from the fixed dc voltage fan supply. This method eliminates the typical problem associated with an external dc voltage regulation method causing loss of headroom to internal control circuitry at low fan supply voltage and the resulting limitation of low-speed operation to 40%. The PWM drive method employed by the THMC40 and THMC41 also reduces fan supply power consumption over the external linear regulation method, which has VI power loss due to the voltage drop across the Regulator By Texas Instruments
THMC40 's PackagesTHMC40 's pdf datasheet
THMC41




THMC40 Pinout, Pinouts
THMC40 pinout,Pin out
This is one package pinout of THMC40,If you need more pinouts please download THMC40's pdf datasheet.

THMC40 Application circuits
THMC40 circuits
This is one application circuit of THMC40,If you need more circuits,please download THMC40's pdf datasheet.


Related Electronics Part Number

Related Keywords:

THMC40 Pb-Free THMC40 Cross Reference THMC40 Schematic THMC40 Distributor
THMC40 Application Notes THMC40 RoHS THMC40 Circuits THMC40 footprint
Hot categories