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參數(shù)資料
| 型號(hào)： | T911.45 |
| 廠商： | ELMOS SEMICONDUCTOR AG |
| 英文描述： | Ripple detection IC |
| 中文描述： | 波紋檢測(cè)集成電路 |
| 文件頁(yè)數(shù)： | 1/1頁(yè) |
| 文件大?。?/td> | 91K |
| 代理商： | T911.45 |
BUS IC
DC/DC CONVERTER
MOTOR DRIVER IC
RIPPLE COUNTER
52
BLOCK DIAGRAM
Ripple detection IC
FEATURES
Supply voltage VDD
4
.
75
V to
5
.
25
V
High voltage input for motor voltage sensing
Variable SC filter for high noise immunity
controlled by motor voltage and current
Hysteresis comparator with adaptive thresholds
for min and max detection
Adjustable filter gain to match motor ripple
amplitude
Logic level ripple output
Low operating current (typ.
3
mA )
Few components to adjust motor type
–
40
°C to +
125
°C operating temperature
SO
14
n package
APPLICATION
Seat-, mirror- and other positioning systems
Pump-, fan- and other speed control systems
DESCRIPTION
The IC detects the commutation ripple of a DC motor in speed
sensing or positioning systems.
The ripple signal is available on an output pin to connect control-
lers or dedicated logic. The IC can be adapted to different motor
characteristics by changing the RC-filter and the voltage divider.
The resonant frequency of the variable band pass filter is auto-
matically set close to the expected ripple frequency by measuring
both, motor voltage and current. Thus for all disturbing frequen-
cies generated by the power supply, the motor drive circuit and
the motor itself, good noise reduction is obtained. To optimize
the filter characteristics the gain can be programmed between
3
and
12
.
Position control
Position control + driver
Speed control
Ripple detection
Filter
&
VCO
μC
VDD
BPO
VDD
VBAT
RPROT
RLP1
RLP2
RSHUNT
PROG 1
PROG 2
RIPOUT
RT
CT
GND
DGND
VCRL
R1
R2
OUTC
CLP1
INNC
SHUNT
VMOT
CLP2
+
_
+
_
M
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