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PYB30-Q48-T515-U Datasheet(PDF) 6 Page - CUI INC |
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PYB30-Q48-T515-U Datasheet(HTML) 6 Page - CUI INC |
6 / 7 page cui.com CUI Inc │ SERIES: PYB30-U │ DESCRIPTION: DC-DC CONVERTER date 08/18/2014 │ page 6 of 7 1. Recommended circuit This series has been tested according to the following recommended testing circuit before leaving the factory. This series should be tested under load (see Figure 3). If you want to further decrease the input/output ripple, you can increase the capacitance accord- ingly or choose capacitors with low ESR (see Table 3). However, the capacitance of the output filter capacitor must be appropriate. If the capacitance is too high, a startup problem might arise. For every channel of the output, to ensure safe and reliable operation, the maximum capacitance must be less than the maximum capacitive load (see Table 4). DC DC Vin GND +Vo 0V Cin Cout Vin GND +Vo 0V Cin Cout DC DC -Vo Cout DC DC Vin GND Vo2 Cout 0V Cout Cout Vo1 C in -Vo2 Single Output Dual Output Triple Output APPLICATION NOTES Figure 3 Figure 4 Note: 1. Minimum load shouldn't be less than 5%, otherwise ripple may increase dramatically. Operation under minimum load will not damage the converter, however, they may not meet all specifications listed. 2. Maximum capacitive load is tested at input voltage range and full load. 3. All specifications are measured at Ta=25°C, humidity<75%, nominal input voltage and rated output load unless otherwise specified. Vout (Vdc) R1 (kΩ) R2 (kΩ) R3 (kΩ) Vref (V) 5 2.883 2.864 10 2.5 12 10.971 2.864 17.8 2.5 15 14.497 2.864 17.8 2.5 +Vo 0V R2 R1 R3 Vref RT Trim 0V R2 R1 R3 Vref RT Trim +Vo Trim up Trim down a -a R 2 a R 1 R2 -a R1 -R3 -R3 : a= Vref Vref Vo’ - Vref Vo’ - Vref R1 R= T : a= R2 R= T up down Note: Value for R1, R2, R3, and Vref refer to Table 5 R T: Trim Resistor a: User-defined parameter, no actual meanings Vo': The trim up/down voltage Application Circuit for Trim pin (part in broken line is the interior of models) Formula for Trim Resistor 2. Output voltage trimming Leave open if not used. Table 5 Single Vout (Vdc) Max. Capacitive Load (μF) Dual Vout (Vdc) Max. Capacitive Load1 (μF) Triple Vout (Vdc) Max. Capacitive Load1 (μF) -- -- -- -- 3.3/±12 4700/300 5 6000 5 2000 3.3/±15 4700/220 12 2500 12 1250 5/±12 4700/300 15 1100 15 680 5/±15 4700/220 Table 3 Table 4 Single Vout (Vdc) Cin (µF) Cout (µF) Dual Vout (Vdc) Cin (µF) Cout1 (µF) Triple Vout (Vdc) Cin (µF) Cout1 (µF) -- -- -- -- -- -- 3.3 10 10 5 10 10 ±5 10 10 5 10 10 12 10 4.7 ±12 10 4.7 ±12 10 4.7 15 10 4.7 ±15 10 4.7 ±15 10 4.7 Note: 1. For each output. Note: 1. For each output. For more information, please visit the product page. |
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