NCP5050 데이터 시트보기 (PDF) - ON Semiconductor

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NCP5050

4.5 W Flash White LED Boost Driver

ON Semiconductor 

PCA

5

R1

2.8k

CTRL

3

ENABLE

NCP5050

90

80

70

60

Vout = 2 LEDs

(7.0 V @ 350 mA)

50

40

30

20

10

Vin = 3.7 V

0

10

100

1000

Iout (mA)

Figure 2. Typical Efficiency

2.7 to 5.5 V

C1

4.7 mF 0603

6.3 V

Cin

PVIN

9

OSC Thermal

1.7MHz Shut down

2.7 mH

L1

OVP

PWM CONTROLLER

D1

1 mF 0805 25V Up to 20 V / 4.5 W

SW

10

C2 D2

Cout

2 VS

D6

FB

7

Band Gap

250k

FLASH/TORCH

4

CM

6

HCS

2.0

R2

RHCS

8

LCS

1

PGND

R3 10.0

RLCS

Figure 3. Simplified Block Diagram

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2

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