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參數(shù)資料
| 型號： | E910.94 |
| 廠商： | ELMOS SEMICONDUCTOR AG |
| 英文描述： | Sensorless speed control of DC-motors |
| 中文描述： | 傳感器的直流調(diào)速電機 |
| 文件頁數(shù)： | 1/1頁 |
| 文件大?。?/td> | 98K |
| 代理商： | E910.94 |
BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
50
BLOCK DIAGRAM
Sensorless speed control of DC-motors
WDOG
VBAT
+
_
μC
VREG
Filter
&
VCO
Ctrl.
PWM Gen
5k / 20kHz
Slewrate
controlled
FET
Driver
M
VS
VDD
CRASH
STATUS
KL15
PWM
PWMLP
PROG1
PROG2
RIPOUT
BPO
RT
CT
VCLR
OUTC
R2
R1
R3
R4
INNC
SHUNT
VHOT
LSHOT
LS
BS
HSHOT
HS
VDD
VDD
RSHUNT
7V
VCC
FEATURES
Supply voltage range VDD
7
V to
16
V
Low standby current typ.
40
μA
Speed regulation using the ripple signal of
motor current
Evaluation of commutation ripple signal
Fully protected half bridge
(slew rate, gate voltage and temperature)
Overlap free PWM actuation for external
power MOS half bridge
Internal charge pump for
100
% actuation
Adjustable maximum motor voltage
Conditioning of motor current for external
μP and ADC
Watch dog with emergency function depending
on the Kl.
15
signal
CRASH input for emergency shutoff of pump
STATUS output for failure analysis
Over voltage shutdown
Over temperature shutdown
–
40
°C to +
125
°C operating temperature
SO
24
w package
DESCRIPTION
The IC is designed to control the speed of DC-motors. In order
to determine the motor speed the commutation-related ripple
of the motor current is evaluated and converted to a
5
V digital
signal for the μC. The filtered motor current is also buffered and
provided to the μC’s ADC. Many types of motors can be adapted
with appropriate filter design.
The nominal motor voltage, provided by the μC is converted into a
20
kHz PWM signal used to drive the power MOS half bridge. Duty
cycle of
100
% is possible due to an implemented charge pump.
The CRASH signal immediately stops the motor in case of an error.
An over-temperature driver shut down is provided with appropri-
ate TEMPFET transistors. With an integrated power supply and
watch dog, an emergency function with maximum motor drive
can be realized in case the μC fails.
APPLICATION
Fuel and hydraulic pumps regulator
Fan regulator
Speed regulator
Position control
Position control + driver
Speed control
Ripple detection
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