V7803-1000-SMT 查看數據表（PDF） - CUI INC

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V7803-1000-SMT

NON-ISOLATED SWITCHING REGULATOR

CUI INC 

For more information, please visit the product page.

CUI Inc │ SERIES: V78-1000-SMT │ DESCRIPTION: NON-ISOLATED SWITCHING REGULATOR

date 01/26/2016 │ page 5 of 6

ADJUSTMENT RESISTOR VALUES

MODEL

Vadj (V)

1.5

1.8

2.5

3.0

3.3

3.6

3.9

4.5

4.9

5.0

5.1

5.5

6.0

6.5

V7801A-1000

R1 (kΩ) R2 (kΩ)

188.1

-

-

-

-

81.4

-

32.2

-

18.6

-

9.5

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

V7802-1000

R1 (kΩ) R2 (kΩ)

15.4

-

68.6

-

-

-

-

88.7

-

41.3

-

20.1

-

8.0

-

-

-

-

-

-

-

-

-

-

-

-

-

-

V7803-1000

R1 (kΩ) R2 (kΩ)

-

-

15.4

-

87

-

339

-

-

-

-

121

-

51.0

-

16.6

-

8.0

-

6.5

-

5.2

-

1.1

-

-

-

-

V7805-1000

R1 (kΩ) R2 (kΩ)

-

-

-

-

9.7

-

30.5

-

48.8

-

75

-

115

-

338

-

1,835

-

-

-

-

426

-

58.7

-

16.9

-

3.2

The R1, R2 in the above table are used to set the output voltage. If no need to adjust the output voltage, connect a ceramic capacitor to

GND with 470pF typical value for increase immunity. Insure the output voltage is in the adjust range or else may cause permanent

damage to the device. Fine-tune output voltage must appease Vin-Vo>2V.

EMC RECOMMENDED CIRCUIT

FUSE LDM1

V in

LDM2

GND

MOV

TVS C0

a

C1

b

EUT

+Vin

+Vout

GND

Figure 1

Recommended External Circuit Components

FUSE

choose according to practical

input current

MOV

10D560

LDM1

82μH

TVS

SMCJ36A

C0

120μF/50V

C1

4.7μF/50V

LDM2

33μH

Table 1

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