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參數資料
| 型號： | NSI50350AST3G |
| 廠商： | ON Semiconductor |
| 文件頁數： | 4/7頁 |
| 文件大?。?/td> | 195K |
| 描述： | IC REG/LED DRIVER 350MA SMC |
| 標準包裝： | 1 |
| 功能： | * |
| 檢測方法： | * |
| 精確度： | * |
| 輸入電壓： | * |
| 電流 - 輸出： | * |
| 工作溫度： | * |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | DO-214AB，SMC |
| 供應商設備封裝： | SMC |
| 包裝： | 標準包裝 |
| 其它名稱： | NSI50350AST3GOSDKR |
NSI50350AST3G
http://onsemi.com
4
APPLICATIONS INFORMATION
The CCR is a self biased transistor designed to regulate the
current through itself and any devices in series with it. The
device has a slight negative temperature coefficient, as
shown in Figure 2 Tri Temp. (i.e. if the temperature
increases the current will decrease). This negative
temperature coefficient will protect the LEDS by reducing
the current as temperature rises.
The CCR turns on immediately and is typically at 20% of
regulation with only 0.5 V across it.
The device is capable of handling voltage for short
durations of up to 50 V so long as the die temperature does
not exceed 175癈. The determination will depend on the
thermal pad it is mounted on, the ambient temperature, the
pulse duration, pulse shape and repetition.
Single LED String
The CCR can be placed in series with LEDs as a High Side
or a Low Side Driver. The number of the LEDs can vary
from one to an unlimited number. The designer needs to
calculate the maximum voltage across the CCR by taking
the maximum input voltage less the voltage across the LED
string (Figures 7 and 8).
Figure 7.
Figure 8.
Higher Current LED Strings
Two or more fixed current CCRs can be connected in
parallel. The current through them is additive (Figure 9).
Figure 9.
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