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MLX92221LUA-AAA-004 データシート(PDF) 10 Page - Melexis Microelectronic Systems

部品番号 MLX92221LUA-AAA-004
部品情報  2-Wire Hall Effect Latch
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メーカー  MELEXIS [Melexis Microelectronic Systems]
ホームページ  http://www.melexis.com
Logo MELEXIS - Melexis Microelectronic Systems

MLX92221LUA-AAA-004 データシート(HTML) 10 Page - Melexis Microelectronic Systems

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MLX92221-AAA
2-Wire Hall Effect Latch
390109224100 Rev. 1
Page 10 of 14
June/13
8 Application Information
8.1 Typical Automotive Application Circuit
8.2 Automotive and Harsh, Noisy
Environments Application Circuit
8.3 Strobing VDD application (used for
reduced self-heating)
C1
10nF
VDD
GND
TEST
RSENSE
VCC
Notes:
1. For proper operation, a 10nF bypass capacitor should be
placed as close as possible to the VDD and ground(GND) pin.
For complete emissions protection a C1 = 68nF is
recommended.
2. The TEST pin is to be left open or connected to GND.
MLX92221 / 41
ECU
VHSENSE
100
C1
68nF
VDD
GND
TEST
RSENSE
VCC
MLX92241
ECU
VHSENSE
100
Notes:
1. For proper operation, a 10nF to 100nF bypass capacitor should be placed as close
as possible to the VDD and ground pin.
2. The device could tolerate negative voltage down to -24V, so if negative transients
over supply line VPEAK< -29V are expected, usage of the diode D1 is recommended.
Otherwise only RSENSE is sufficient.
When selecting the resistor RSENSE, three points are important:
- the resistor has to limit IDD/IDDREV to 50mA maximum
- the resistor has to withstand the power dissipated in both over voltage
conditions (VRSENSE
2/R
SENSE)
- the resulting device supply voltage VDD has to be higher than VDD min
(VDD = VCC – RSENSE.IDD)
3. The device could tolerate positive supply voltage up to +27V (until the maximum
power dissipation is not exceeded), so if positive transients over supply line with
VPEAK> 32V are expected, usage a zener diode DZ1 is recommended. The RSENSE-DZ1
network should be sized to limit the voltage over the device below the maximum
allowed.
DZ1
(optional,
see Note 3)
D1
(optional,
see Note 2)
MLX92221 / 41
C1
68nF
VDD
GND
TEST
RSENSE
VCC
MLX92221 / 41
ECU
VHSENSE
100
Notes:
1. Given strobe timing is exemplary only.
2. For proper operation, a 10nF to 100nF bypass capacitor should be placed as
close as possible to the VDD and ground pin.
t
t
VDD
IDD
IONtyp
I
OFFtyp
12V
South Pole
weak South or B = null
ON phase
OFF phase
(1ms)
(1s)
Valid IDD
state
tON
tON
Valid IDD
state


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