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K7803T-1000 Datasheet(PDF) 3 Page - MORNSUN Science& Technology Ltd. |
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K7803T-1000 Datasheet(HTML) 3 Page - MORNSUN Science& Technology Ltd. |
3 / 6 page The copyright and authority for the interpretation of the products are reserved by MORNSUN K78XXT-1000 A/2-2012 Page 3 of 6 EMC RECOMMENDED CIRCUIT PCB LAYOUT (Figure 2) EMC TEST WAVEFORM CE (Without external circuit) CE (refer to Figure 1) TYPICAL APPLICATION CIRCUIT K7805T-1000 1 7 ,9 5 Vin G ND Vo ut C2 C1 6 10 ON/OFF R1 R2 G ND 470pF C4 (Figure 3) EXTERNAL CAPACITOR TABLE Part Number C1 (Ceramic Capacitor) C2 (Ceramic Capacitor) K78XXT-1000 10 μF/25V 22 μF/16V 1. C1, C2 is required for best performance and should be fitted close to the converter pins. 2. The capacitance of C1, C2 sees external capacitor table, it can be increased properly if required, and tantalum or low ESR electrolytic capacitors may also suffice. 3. No parallel connection or plug and play. ADJUSTMENT RESISTOR VALUES Part Number K78X2T-1000 K7802T-1000 K7803T-1000 K7805T-1000 Vo (Nominal) 1.8(V) 2.5(V) 3.3(V) 5.0(V) Vadj (V) R1(K Ω) R2(K Ω) R1(K Ω) R2(K Ω) R1(K Ω) R2(K Ω) R1(K Ω) R2(K Ω) 1.5 188.1 - 15.4 - - - - - 1.8 - - 68.6 - 15.4 - - - 2.5 - 81.4 - - 87 - 9.7 - 3.0 - 32.2 - 88.7 339 - 30.5 - 3.3 - 18.6 - 41.3 - - 48.8 - 3.6 - 9.5 - 20.1 - 121 75 - 3.9 - - - 8.0 - 51.0 115 - 4.5 - - - - - 16.6 338 - 4.9 - - - - - 8.0 1835 - 5.0 - - - - - 6.5 - - 5.1 - - - - - 5.2 - 426 5.5 - - - - - 1.1 - 58.7 6.0 - - - - - - - 16.9 6.5 - - - - - - - 3.2 The R1, R2 in the above table are used to set the output voltage. If no need to adjust the output voltage, connect a ceramic capacitor to GND with 470pF typical value for increase immunity. Insure the output voltage is in the adjust range or else may cause permanent damage to the device. Fine-tune output voltage must appease Vin-Vo>2V. |
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