APC18T12-9 Просмотр технического описания (PDF) - Astec Semiconductor => Silicon Link

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APC18T12-9

12Vin / 18A Non-Isolated Point-of-Load

Astec Semiconductor => Silicon Link 

Technical Reference Notes

APC18T12 Series

Typical Application Circuit

Figure 3. Typical Application Circuit

Enable Pin

The converter comes with an Enable pin primarily used to turn ON/OFF the converter. The converter is disabled (OFF) when

the voltage across the Enable pin and ground is between 0V to 0.8V. The converter is Enabled (ON) when the voltage across

the Enable pin and ground is between 2.6V to 15V (or the Enable Pin is left open).

Output Trim

Output voltage adjustment is accomplished by connecting an external resistor between the Trim Pin and Ground Pin terminals.

Resistance and Output voltage relationship is established by Equation 1. If Trim pin is left open – default VO = 0.75V

TRIM-UP EQUATION:

R trim

=

(

10500

Vo −0.75

− 1000)Ω

(1)

Where Rtrim is the resistance value in ohms and VO in Volts is the output voltage desired.

Table Rtrim values for different output voltage adjustment

Vo (V)

0.75 1.0

1.2

1.5

1.8

Rtrim (? ) from open 41.0K 22.3K 13.0K 9.00K

Equation (1)

Rtrim (? ) from open 41.2K 22.1K 13.0K 9.09K

E96

2.0

7.40K

7.32K

2.5

5.00K

4.99K

3.3

3.12K

3.09K

5.0

1.47K

1.47K

MODEL: APC18T12 SERIES

NOVEMBER 4, 2004 - REVISION 00

SHEET 6 OF 10

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