VPT30-2800S SERIES DATASHEET

4.0

SALES INFORMATION: phone (425) 353-3010 • fax (425) 353-4030 • vptsales@vptpower.com • www.vptpower.com

8

6.0 PACKAGE PIN DESCRIPTION

Pin

Function

Description

1

INHIBIT

This is an open collector input. Logic Low = Disabled Output. Connect the inhibit pin to input common to disable the output.

Unconnected, open collector or open drain = Enabled Output.

2

CASE

Case Connection.

3

SYNC

FrequencySynchronization Signal Input. TTL squarewave, 5 Vpp, 20

– 80% duty cycle, internallycapacitivelycoupled.

4

INCOM

Input Return Connection.

5

28VIN

Positive Input Voltage Connection.

6

TRIM

Trim Output Voltage to +10%, -20% of Nominal Value. Leave open if not used.

7

-SENSE

Output Return Remote Sense. Compensate for up to 0.5 V total drop (positive and return).

8

OUTCOM

Output Return Connection.

9

+VOUT

Positive Output Voltage Connection.

10

+SENSE

Positive Output Voltage Remote Sense. Compensate for up to 0.5 V total drop (positive and return).

7.0 OUTPUT VOLTAGE TRIM

The output voltage can be trimmed down by connecting a resistor between the TRIM pin and the +VOUT pin, or can be trimmed up

by connecting a resistor between the TRIM pin and the OUTCOM pin as shown in Section 2.2. The maximum trim range is +10% up

and –20% down. The appropriate resistor values versus the output voltage are given in the trim table below.

VPT30-283R3S

VPT30-2805S

VPT30-2812S

VPT30-2815S

+Vout (V)

Rtrim

(Ω)

+ Vout (V)

Rtrim

(Ω)

+ Vout (V)

Rtrim (Ω)

+ Vout (V)

Rtrim

(Ω)

3.60

72.7k

5.5

39.6k

13.2

10.7k

16.50

6.5k

3.55

89.2k

5.4

52k

13.0

14.8k

16.25

9.8k

3.50

114k

5.3

72.6k

12.8

21k

16.00

14.8k

3.45

155k

5.2

113.9k

12.6

31.3k

15.75

23k

3.40

238k

5.1

237k

12.4

51.9k

15.50

39.6k

3.35

487k

5.0

--

12.2

114k

15.25

89k

3.30

--

4.9

232.5k

12.0

--

15.00

--

3.25

144k

4.8

106.1k

11.8

457k

14.75

482k

3.20

61.9k

4.7

64k

11.6

218k

14.50

231k

3.15

34.7k

4.6

43k

11.4

139k

14.25

147k

3.10

21k

4.5

30.4k

11.2

99k

14.00

105k

3.05

12.79k

4.4

22k

11.0

75.2k

13.75

80.2k

3.00

7.33k

4.3

16k

10.8

59.4k

13.50

63.5k

2.95

3.43k

4.2

11.5k

10.6

48k

13.25

51.6k

2.90

498

4.1

8.0k

10.4

39.5k

13.00

42.6k

4.0

5.2k

10.2

32.9k

12.75

35.6k

10.0

27.6k

12.50

30k

9.8

23.3k

12.25

25.5k

9.6

19.7k

12.00

21.7k