NCP3065 데이터 시트보기 (PDF) - ON Semiconductor

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NCP3065

Up to 1.5 A Constant Current Switching Regulator for LEDs

ON Semiconductor 

NCP3065, NCV3065

MTB30P06V

Q4

MMBT3904LT1G

Q5

6x 1R0 ±1%R

R15

1k

MMSD4148

0R04

R1 R2 R3 R4 R5 R6 R7

J2

1

+VIN

J3

1206 1206 1206 1206 1206 1206

C4

0.1 mF

C7 +

+ 1 mF / 50 V

C2

220 mF / 50 V

C8

1

GND

J4

1

BC807-LT1G

+VAUX

Q1

Q2

0.1 mF

R9

10 k

0805

U1

8 N.C. SWC 1

7 IPK SWE 2

6 VCC TCAP 3

5 COMP GND 4

NCP3065

SOIC8

R14

NU

R13

NU

D2

CT

R8

PF0504.223NL

L1

15 k

C3

1.8 nF

C1

1206 0.1 mF

D1

MBRS140LT3G

C5 100 pF

J1

1

+LED

+

C6

220 mF /

50 V

R10

0805 1 k

R16

0R15 ±1%

R12

0R15 ±1%

J5

1

-LED

J7

J6

1

ON/OFF

R11

1k2

0805

BC817-LT1G

Figure 25. Buck Demoboard with External Switch Application Schematic

1

GND

Value of Components

Name

Value

C1

100 mF, 50 V, Electrolytic Capacitor

C1, C4, C8 100 nF, Ceramic Capacitor, 1206

C2, C6

220 mF, 50 V, Electrolytic Capacitor

C3

2.2 nF, Ceramic Capacitor, 0805

C5

100 pF, Ceramic Capacitor, 0805

C7

1 mF / 50 V, Ceramic Capacitor, 1206

D1

MBRS540LT3G, Schottky Diode

D2

MMSD4148T1G, Diode

L1

22 mH

Q2

BC817-LT1G, SOT23

Name

Q4

Q5

R1

R8

R9

R10

R11

R12, R16

U1

Test Results

Test

Line Regulation

Output Ripple

Efficiency

Short Circuit Current

Condition

Vin = 8 V to 35 V, Io = 3000 mA

Vin = 12 V, Io = 3000 mA

Vin = 12 V, Io = 3000 mA

Vin = 12 V, Rload = 0.15 W

Value

MTB30P06V, P-MOS transistor

MMBT3904LT1G

40 mW, Resistor 0.5 W

6k8, Resistor 0805

10k, Resistor 0805

1k, Resistor 0805

1k2, Resistor 0805

150 mW, Resistor 0.5 W

NCP3065, SOIC8

< 6%

< 6%

> 78%

Results

http://onsemi.com

14

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