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S48SP05007NMFA Datasheet(PDF) 9 Page - Delta Electronics, Inc. |
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S48SP05007NMFA Datasheet(HTML) 9 Page - Delta Electronics, Inc. |
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9 / 14 page  DS_S48SP05007_10252013 9 FEATURES DESCRIPTIONS (CON.) Output Voltage Adjustment To increase or decrease the output voltage set point, the modules may be connected with an external resistor between the TRIM pin and either the Vo(+) or Vo(-). The TRIM pin should be left open if this feature is not used. R Load Vo (+) Trim Vo (-) R trim-down Vi (+) Vi (-) ON/OFF R Load Vo (+) Trim Vo (-) R trim-down Vi (+) Vi (-) ON/OFF Vo (+) Trim Vo (-) R trim-down Vi (+) Vi (-) ON/OFF Figure 17: Circuit configuration for trim-down (decrease output voltage) If the external resistor is connected between the TRIM and Vo(+) pins, the output voltage set point decreases (Fig. 17). The external resistor value required to obtain an output voltage change from 5V to the desired Vo_adj is defined as: Rtrim_down Vo_adj 2.5 − ( ) 5110 ⋅ 5.0 Vo_adj − 2050 − Ex. When Trim-down -10% Vo_adj=5.0V×(1-10%)=4.5V Rtrim_down 4.5 2.5 − ( ) 5110 ⋅ 5.0 4.5 − 2050 − Rtrim_down 1.839 10 4 × = ohm Vo (+) Trim Vo (-) R Load R trim-up Vi (+) Vi (-) ON/OFF Vo (+) Trim Vo (-) R Load R trim-up Vi (+) Vi (-) ON/OFF Figure 18: Circuit configuration for trim-up (increase output voltage) If the external resistor is connected between the TRIM and Vo(-) the output voltage set point increases (Fig. 18). The external resistor value required to obtain an output voltage change from 5V to the desired Vo_adj is defined as: Rtrim_up 2.5 5110 ⋅ Vo_adj 5.0 − 2050 − Ex. When Trim-up +10% Vo_adj=5.0V×(1+10%)=5.5V Rtrim_up 2.5 5110 ⋅ 5.5 5.0 − 2050 − Rtrim_up 2.35 10 4 × = ohm When using trim function, the output voltage of the module is usually increased, which increases the power output of the module with the same output current. Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power. |
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