NSI45025ZT1G(2009) Ver la hoja de datos (PDF) - ON Semiconductor
Número de pieza
componentes Descripción
Fabricante
NSI45025ZT1G Datasheet PDF : 6 Pages
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APPLICATIONS
NSI45025ZT1G
D1
Anode
Cathode
+
− Vin
Q1
Q2
LED
HF3−R5570
LED
HF3−R5570
LED
HF3−R5570
LED
HF3−R5570
LED
HF3−R5570
LED
HF3−R5570
Qx
LED
HF3−R5570
LED
HF3−R5570
LED
HF3−R5570
D1
Anode
Q1
Q2
Qx
Cathode
+
− Vin
LED
HF3−R5570
LED
HF3−R5570
LED
HF3−R5570
Figure 7. Typical Application Circuit
(25 mA each LED String)
Number of LED’s that can be connected is determined by:
D1 is a reverse battery protection diode
LED’s = ((Vin − QX VF + D1 VF)/LED VF)
Example: Vin = 12 Vdc, QX VF = 3.5 Vdc, D1VF = 0.7 V
LED VF = 2.2 Vdc @ 25 mA
(12 Vdc − 4.2 Vdc)/2.2 Vdc = 3 LEDs in series.
Figure 8. Typical Application Circuit
(75 mA each LED String)
Number of LED’s that can be connected is determined by:
D1 is a reverse battery protection diode
Example: Vin = 12 Vdc, QX VF = 3.5 Vdc, D1VF = 0.7 V
LED VF = 2.6 Vdc @ 75 mA
(12 Vdc − (3.5 + 0.7 Vdc))/2.6 Vdc = 3 LEDs in series.
Number of Drivers = LED current/25 mA
75 mA/25 mA = 3 Drivers (Q1, Q2, Q3)
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