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PRF20-Q110-D12 Datasheet(PDF) 5 Page - CUI INC |
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PRF20-Q110-D12 Datasheet(HTML) 5 Page - CUI INC |
5 / 6 page cui.com CUI Inc │ SERIES: PRF20 │ DESCRIPTION: DC-DC CONVERTER date 02/12/2014 │ page 5 of 6 APPLICATION NOTES Note: 1. All specifications are measured at Ta=25°C, nominal input voltage and full output load unless otherwise specified. Output Voltage Trimming Leave open if not used. Table 3 Vout (Vdc) R1 (KΩ) R2 (KΩ) R3 (KΩ) Rt (KΩ) Vr (V) 5 2.32 2.32 0 8.2 2.5 12 6.8 2.4 2.32 22 2.5 15 8.06 2.4 3.9 27 2.5 +Vin R trim-up R-Load Trim +Vo -Vin -Vo Trim up +Vin -Vin -Vo +Vo R trim-down R-Load Trim Trim down Rtrim - up = ( ) - Rt (KΩ) Rtrim - down = R1 x ( -1) - Rt (KΩ) Vr x R1 x (R2 + R3) (Vo - Vo, nom) x R2 Vr x R1 (Vo, nom - Vo) x R2 Note: R trim-up is the external resistor in KΩ R trim-down is the external resistor in KΩ V O, nom is the nominal output voltage V O is the desired output voltage R1, R2, R3, Rt, and Vr are internal (see table 3). Figure 3 Formula for Trim Resistor Application Circuit for Trim pin For more information, please visit the product page. |
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