ELMOS E910.16

BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
DRIVER IC
I/O IC
SENSOR IC
SENSOR INTERFACE IC
ÿ Fan control
EC motor control
Steppermotor driver
ÿ Fan control
E910.16
FEATURES
DESCRIPTION
PINNING
ÿ
Supply voltage range VS 7.2V to 17.5V
The IC controls the voltage across a DC fan motor as a function of
ÿ
Overvoltage shut down
the voltage applied to the control input “SOLL”. The IC delivers the
ÿ
Low standby current (power down mode)
gate voltage for one or two (parallel) external power-FETs, which
ÿ
Limitation of power dissipation by voltage
linearly drive the load current of the motor. The drain currents of
dependent current limitation
the two external power-FETs are matched by measuring the volt-
ÿ
Externally adjustable minimum current
ages across each individual shunt resistor.
ÿ
Externally adjustable over temperature protection
ÿ
Pin
Name
Description
1
MOTH
Positive motor terminal
MOTH
1
16
2
MOTL
Negative motor terminal
MOTL
2
15
3
VDD
Regulator output voltage 5 V (switched off in standby)
VDD
3
14
THREF
4
13
4
THREF
THON
5
12
SOLL
6
11
5
THON
NC
7
10
6
SOLL
Input for nominal motor voltage
IK
8
9
NC
Not connected
Reference voltage for IC activation
(won`t be switched off)
Threshold voltage for IC activation
featuring load current reduction
Rapid changes in control voltage are converted into smooth mo-
Control of current distribution in 2 parallel
tor current transients.
7
8
IK
Voltage for maximum short circuit current of driver
9
TEMP
Temperature input for power reduction
10
S2
Current sense input of slave FET
11
GND
Ground connection
temperature limit.
12
S1
Current sense input of master FET
13
G2
Gate control of slave FET
The sleep mode with very low standby current of typ. 50µA will
14
COMP
Feedback input of motor voltage regulation
15
G1
Gate control of master FET
16
VS
Supply voltage
power-FETs
ÿ
Turn on the power-FETs during load-dump
Overcurrent limitation is provided as a function of the motor volt-
ÿ
– 40°C to + 125°C operating temperature
age. Over temperature protection is realized as load current re-
ÿ
SO16w package
duction to achieve a minimum torque of the motor even at the
APPLICATION
ÿ
PACKAGE
Fan regulation
be activated when the control voltage “SOLL” drops below a minimum value, which can be adjusted externally.
BLOCK DIAGRAM
VS
G1
COMP
G2
S1
GND
S2
TEMP
VBAT
VBAT
VS
VDD
VSOLL
MOTH
VDD
Regulator
Motor
Voltage
Sense
SOLL
THREF
Threshold
Limiter
M
MOTL
COMP
UTHON
VDD
TEMP
Temp.
Limit
Motor
control
G1
MOSFET
Driver
G2
Current
Sense
S2
VDD
IK
38
Short
Circuit
Current Set
S1
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
39