GH2801SCKA datasheet(7/9 Pages) IRF

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GH-SERIES

(28V Input, Single Output)

Application Note:

Table 1. Equation Parameters by Model

where: RADJ is in Kohms

RADJ is connected to -sense and VNOM < VOUT < 1.1VNOM

VNOM is the nominal output voltage with the Adjust Pin left open

VOUT is the desired output voltage

A and B are parameters defined in Table 1

The GH-Series converters have an Output Adjust pin (pin 12), which when connected via an external resistor

(RADJ) to either the –sense (pin 11) or +sense (pin 6), allows the nominal output voltage to be adjusted. Use

the following equations with the parameters listed in Table 1 to calculate the required resistor value (RADJ).

For all Models, to adjust the output voltage higher:

NOM

OUT

ADJ

For all Models, to adjust the output voltage lower:

OUT

ADJ

⎟⎟⎠

⎞

⎜⎜⎝

⎛

−

)

(

where: RADJ is in Kohms

RADJ is connected to +sense and D < VOUT < VNOM

VNOM is the nominal output voltage with the Adjust Pin left open

VOUT is the desired output voltage

A, B, C and D are parameters defined in Table 1

EQUATION PARAMETERS

MODEL

GH2801S

0.714

14.3

5.0

0.965

GH2801R5S

0.937

12.6

3.33

1.425

GH2801R8S

1.047

11.5

2.78

1.689

GH2802R5S

1.25

2.0

2.292

GH2803R3S

1.425

8.34

1.52

2.937

GH2805S

1.667

6.68

1.0

4.233

GH2801SCKA Datasheet(PDF) 7 Page - International Rectifier

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