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MP1521 Arkusz danych(PDF) 6 Page - Monolithic Power Systems

Numer części MP1521
Szczegółowy opis  High Efficiency White LED Driver
PDF  8 Pages
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Producent  MPS [Monolithic Power Systems]
Strona internetowa  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP1521 Arkusz danych(HTML) 6 Page - Monolithic Power Systems

  MP1521 Datasheet HTML 1Page - Monolithic Power Systems MP1521 Datasheet HTML 2Page - Monolithic Power Systems MP1521 Datasheet HTML 3Page - Monolithic Power Systems MP1521 Datasheet HTML 4Page - Monolithic Power Systems MP1521 Datasheet HTML 5Page - Monolithic Power Systems MP1521 Datasheet HTML 6Page - Monolithic Power Systems MP1521 Datasheet HTML 7Page - Monolithic Power Systems MP1521 Datasheet HTML 8Page - Monolithic Power Systems  
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MP1521
High Efficiency
White LED Driver
MP1521 Rev 2.7 10/06/04
www.monolithicpower.com
6
Monolithic Power Systems
8
7
IN
BRT
FB1
OLS
SW 10
GND 9
CIN
4.7µF
VIN
COUT
1µF
EN
REF
4
3
2
1
D1, B130
20
MP1521
L1
6
5
FB2
FB3
White LEDs
EN
GND
OFF
ON
BRT
Application Circuits
Figure 3: One String of Four (4) LEDs
Figure 4: One String of Six (6) LEDs (Low inductor height for portables)
8
7
IN
BRT
FB1
OLS
SW 10
GND 9
CIN
4.7µF
VIN
COUT
1µF
EN
REF
4
3
2
1
D1, B130
20
MP1521
L
47µH
6
5
FB2
FB3
White LEDs
BRT
EN
GND
OFF
ON
Line regulation using 1.2mm High
Sumida CMD4D11 Inductor
15.0
17.0
19.0
21.0
23.0
2.5
3
3.5
4
4.5
VIN (V)
6.8µH
10µH
15µH
Efficiency vs VIN using 1.2mm High
Sumida CMD4D11 Inductor
70
75
80
85
2.5
3
3.5
4
4.5
VIN (V)
6.8µH
10µH
15µH
15
16
17
18
19
20
21
22
2.4
3.0
3.6
4.2
VIN (V)
Efficiency vs LED current using
47µH Toko D62CB Inductor
75
80
85
90
VIN = 4V
VIN = 3V
Line regulation using
47µH Toko D62CB Inductor
LED Current mA
5
10
15
20



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