driven by - Elmos Semiconductor AG

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
sales@elmos.de | 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.