driven by E910.16 Dc MOTOR linear FET controller Features General Description ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ The IC controls the voltage across a DC fan motor as a function of the voltage applied to the control input “SOLL”. The IC delivers the gate voltage for one or two (parallel) external power FETs, which linearly drive the load current of the motor. The drain currents of the two external power FETs are matched by measuring the voltages across each individual shunt resistor. Supply voltage range VS 7.2V to 17.5V Overvoltage shut down Low standby current (power down mode) Limitation of power dissipation by motor voltage dependent current limitation Externally adjustable min. short circuit current Externally adjustable overtemperature protection featuring load current reduction Control of current distribution in 2 parallel power FETs Turn on the power-FETs during load dump Operating temperature range - 40°C to + 125°C SOIC 16 package Applications Rapid changes in control voltage are converted into smooth motor current transients. Overcurrent limitation is provided as a function of the motor voltage. Overtemperature protection is realized as load current reduction to achieve a minimum torque of the motor even at the temperature limit. The sleep mode with very low standby current of typ. 50µA will be activated when the control voltage “SOLL” drops below a minimum value, which can be adjusted externally. ÿ Fan control ÿ Linear motor voltage control VBAT VBAT VS VDD MOTH VDD Regulator Motor Voltage Sense SOLL VSOLL THREF UTHON VDD TEMP MOTL Threshold Limiter COMP G1 Temp. Limit Motor control MOSFET Driver G2 VDD IK M S1 Short Circuit Current Set Current Sense S2 E910.16 ELMOS Semiconductor AG Info Sheet QM-No.: 25IS0009E.00 2009-10-13 ELMOS Semiconductor AG – Headquarters Heinrich-Hertz-Str. 1 | 44227 Dortmund | Germany Phone + 49 (0) 231 - 75 49 - 100 | Fax + 49 (0) 231 - 75 49 - 149 [email protected] | www.elmos.de Note ELMOS Semiconductor AG (below ELMOS) reserves the right to make changes to the product contained in this publication without notice. ELMOS assumes no responsibility for the use of any circuits described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication has been checked, no responsibility, however, is assumed for inaccuracies. ELMOS does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications. Copyright © 2009 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.