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參數(shù)資料
| 型號(hào)： | NIS5102QP2HT1 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 電源管理 |
| 英文描述： | High Side SMART HotPlug IC/Inrush Limiter/Circuit Breaker |
| 中文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, DSO12 |
| 封裝： | 9 X 9 MM, PLLP-12 |
| 文件頁數(shù)： | 10/14頁 |
| 文件大?。?/td> | 150K |
| 代理商： | NIS5102QP2HT1 |
NIS5102
http://onsemi.com
10
V
CC
R
UVLO
400 k
UVLO
V
GS(th)
= 1.15 V
40 k
3 k
Ground
Source
Figure 18. Equivalent Undervoltage Lockout Circuit
The theoretical equation for the UVLO turnon voltage is:
400 Vin
RUVLO(K )
460
Vin
17.5
The UVLO trip point voltage calculated through the
theoretical formula may show small variations with respect
to Figure 3, therefore it is recommended to use the formulas
gotten from the UVLO characterization, which are shown
below:
e[(UVLO
14.647) 3.9858];forTJ
where “UVLO” is the desired undervoltage lockout value,
and R
UVLO
is the programming resistor from the UVLO pin
to the V
CC
pin.
To reduce nuisance tripping due to transients and noise
spikes, a capacitor may be added from the UVLO pin to
RUVLO(k )
25
°
C
ground. This will create a low pass filter with a cutoff
frequency of f. The required capacitance on this pin is:
CUVLO
1
2 · f 43 K
RUVLO· 400 K
RUVLO
400 K
Overvoltage Lockout and Parallel Shutdown
The overvoltage lockout (OVLO) is a dual function pin.
This pin will normally be biased somewhere between
ground and the input voltage, due to an internal voltage
divider which sets the turnoff voltage level at 22 V. This
voltage level can be reduced by adding an external resistor
from the OVLO pin to the V
CC
pin. When the input voltage
reaches the programmed trip point, operation of the device
is inhibited.
Figure 19 shows the equivalent circuit.
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