E910.16 Datasheet, PDF (1/1 Pages) ELMOS Semiconductor AG – Fan control

BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
ÿ Fan control
EC motor control
Steppermotor driver
RIPPLE COUNTER
ÿ Fan control
FEATURES
ÿ Supply voltage range VS 7.2V to 17.5V
ÿ Overvoltage shut down
ÿ Low standby current (power down mode)
ÿ Limitation of power dissipation by voltage
dependent current limitation
ÿ Externally adjustable minimum current
ÿ Externally adjustable over temperature protection
featuring load current reduction
ÿ Control of current distribution in 2 parallel
power-FETs
ÿ Turn on the power-FETs during load-dump
ÿ – 40°C to + 125°C operating temperature
ÿ SO16w package
APPLICATION
ÿ Fan regulation
DESCRIPTION
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 volt-
ages across each individual shunt resistor.
Rapid changes in control voltage are converted into smooth mo-
tor current transients.
Overcurrent limitation is provided as a function of the motor volt-
age. Over temperature protection is realized as load current re-
duction 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 mini-
mum value, which can be adjusted externally.
DRIVER IC
I/O IC
SENSOR IC
SENSOR INTERFACE IC
PINNING
Pin Name
1 MOTH
2 MOTL
3 VDD
4 THREF
5 THON
6 SOLL
7 NC
8 IK
9 TEMP
10 S2
11 GND
12 S1
13 G2
14 COMP
15 G1
16 VS
Description
Positive motor terminal
Negative motor terminal
Regulator output voltage 5 V (switched off in standby)
Reference voltage for IC activation
(won`t be switched off)
Threshold voltage for IC activation
Input for nominal motor voltage
Not connected
Voltage for maximum short circuit current of driver
Temperature input for power reduction
Current sense input of slave FET
Ground connection
Current sense input of master FET
Gate control of slave FET
Feedback input of motor voltage regulation
Gate control of master FET
Supply voltage
E910.16
PACKAGE
MOTH
1
MOTL
2
VDD
3
THREF
4
THON
5
SOLL
6
NC
7
IK
8
16
VS
15
G1
14
COMP
13
G2
12
S1
11
GND
10
S2
9
TEMP
BLOCK DIAGRAM
VBAT
VSOLL
VDD
SOLL
THREF
UTHON
VDD
TEMP
VDD
IK
VS
VDD
Regulator
Threshold
Limiter
Temp.
Limit
Short
Circuit
Current Set
Motor
control
MOTH
Motor
Voltage
Sense
MOTL
COMP
MOSFET
G1
G2
Driver
Current
S1
S2
Sense
VBAT
M
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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 © 2005 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.
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elmos product catalog june 2005
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