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MC34164DM-5 bảng dữ liệu(PDF) 6 Page - ON Semiconductor

tên linh kiện MC34164DM-5
Giải thích chi tiết về linh kiện  MICROPOWER UNDERVOLTAGE SENSING CIRCUITS
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nhà sản xuất  ONSEMI [ON Semiconductor]
Trang chủ  http://www.onsemi.com
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MC34164, MC33164, NCV33164
http://onsemi.com
6
Figure 15. Low Voltage Microprocessor Reset With Additional Hysteresis
(MC3X164−5 Shown)
Power
Supply
1.2 Vref
Microprocessor
Circuit
RL
GND
Reset
Comparator hysteresis can be increased with the addition of resistor RH. The hysteresis equation has been simplified and does not account for the change of input current
Iin as Vin crosses the comparator threshold (Figure 8). An increase of the lower threshold DVth(lower) will be observed due to Iin which is typically 10 mA at 4.3 V. The
equations are accurate to
±10% with RH less than 1.0 kW and RL between 4.3 kW and 43 kW.
VH
4.3 RH
RH
MC3X164−5
Iin
Vin
Test Data
VH
(mV)
DVth
(mV)
RH
(
W)
RL
(k
W)
60
103
123
160
155
199
280
262
306
357
421
530
0
1.0
1.0
1.0
2.2
2.2
2.2
4.7
4.7
4.7
4.7
4.7
0
100
100
100
220
220
220
470
470
470
470
470
43
10
6.8
4.3
10
6.8
4.3
10
8.2
6.8
5.6
4.3
RL
+ 0.06
DVth(lower) ≈ 10 RH x 10 − 6
where: RH ≤ 1.0 kW
43 k
W ≥ RL ≥ 4.3 kW
Figure 16. Voltage Monitor
Figure 17. Solar Powered Battery Charger
Figure 18. MOSFET Low Voltage Gate Drive Protection Using the MC3X164−5
1.2 Vref
Input
270
Reset
GND
Power
Supply
1.2 Vref
Input
1.0 k
GND
1.2 Vref
Input
GND
Solar
Cells
RL
MTP3055EL
MC3X164−5
VCC
4.3V
Overheating of the logic level power MOSFET due to insufficient
gate voltage can be prevented with the above circuit. When the
input signal is below the 4.3 V threshold of the MC3X164−5, its
output grounds the gate of the L2 MOSFET.
Reset
Reset


Số phần tương tự - MC34164DM-5

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Mô tả tương tự - MC34164DM-5

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