apa18t12 Astec Powe, apa18t12 Datasheet - Page 12

• Manufacturer Part Number: apa18t12
• Description: 12vin, 75watts, Non-isolated Dc - Dc Pol Sip Converter
• Manufacturer: Astec Powe

APPENDIX A6: OUTPUT TRIM REQUIREMENT
Model: APA18T12 Series
Date: June 2004
V
O, set
0.75
1.2
1.5
1.8
2.5
3.3
5.0
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 V
TRIM-UP EQUATION:
Where R
(V)
trim
O
= 0.75V
Rtrim (K.)
is the resistance value in ohms and V
22.33
Open
13.0
3.12
1.47
9.0
5.0
APA18
Figure 7. Trim UP test configuration (Pin Side Up)
Rtrim
APA18T12 DC - DC Series
Technical Reference Note
SENSE
TRIM
GND
Vo
Vo
10500
Preliminary

. 0
75
O
is the output voltage desired.

Rtrim
1000
Co1
Co2
SH 12 OF 17
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