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參數資料
| 型號： | NSI45090DDT4G |
| 廠商： | ON Semiconductor |
| 文件頁數： | 4/6頁 |
| 文件大小： | 138K |
| 描述： | IC LED DRIVER/REG CCR TP-FA |
| 產品變化通告： | Product Obsolescence 08/Apr/2011 |
| 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： | TO-252-3，DPak（2 引線+接片），SC-63 |
| 供應商設備封裝： | DPAK-3 |
| 包裝： | 標準包裝 |
| 其它名稱： | NSI45090DDT4GOSDKR |
NSI45090DDT4G
http://onsemi.com
4
Figure 7. Power Dissipation vs. Ambient
Temperature @ T
J
= 1505C
T
A
, AMBIENT TEMPERATURE (癈)
80
60
20
0
20
40
600
900
1500
1800
40
700 mm
2
/2 oz
700 mm
2
/1 oz
500 mm
2
/1 oz
1200
2100
300
300 mm
2
/1 oz
500 mm
2
/2 oz
2400
2700
3000
300 mm
2
/2 oz
120
100
3300
3600
3900
4200
APPLICATIONS
Q1
Q2
Anode
Qx
LED
HF3R5570
LED
HF3R5570
LED
HF3R5570
Cathode
Q1
Q2
Anode
LED
HF3R5570
Qx
LED
HF3R5570
LED
HF3R5570
LED
HF3R5570
LED
HF3R5570
LED
HF3R5570
LED
HF3R5570
Cathode
LED
HF3R5570
LED
HF3R5570
Figure 8. Typical Application Circuit
(30 mA each LED String)
Figure 9. Typical Application Circuit
(90 mA each LED String)
Number of LEDs that can be connected is determined by:
D1 is a reverse battery protection diode
LEDs = ((V
in
Q
X
V
F
D1 V
F
)/LED V
F
)
Example: V
in
= 12 Vdc, Q
X
V
F
= 3.5 Vdc, D1VF = 0.7 V
LED V
F
= 2.2 Vdc @ 30 mA
(12 Vdc 4.2 Vdc)/2.2 Vdc = 3 LEDs in series.
Number of LEDs that can be connected is determined by:
D1 is a reverse battery protection diode
Example: V
in
= 12 Vdc, Q
X
V
F
= 3.5 Vdc, D1VF = 0.7 V
LED V
F
= 2.6 Vdc @ 90 mA
(12 Vdc (3.5 + 0.7 Vdc))/2.6 Vdc = 3 LEDs in series.
Number of Drivers = LED current/30 mA
90 mA/30 mA = 3 Drivers (Q1, Q2, Q3)
+
+
D1
D1
V
in
V
in
R
adj
R
adj
R
adj
R
adj
R
adj
R
adj
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