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K78U05-500 Datasheet(PDF) 2 Page - Crystek Corporation |
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K78U05-500 Datasheet(HTML) 2 Page - Crystek Corporation |
2 / 4 page The copyright and authority for the interpretation of the products are reserved by MORNSUN Specifications subject to change without notice. K78UXX-500(L) A/1-2011 Page 2 of 4 TYPICAL CHARECTERISTICS TYPICAL APPLICATION CIRCUIT Operating Temp.( ) C Temperature Derating Graph (figure 1) K78UXX-500(L) 1 2 3 +Vin GND +Vout GND C1 (figure 2) Note: 1. The regulator proposed to establish the input voltage by soft-start, no plug and play, if the input voltage changes from low voltage to high voltage abruptly, the regulator might be damaged. 2. If the applications is high-voltage input, the regulator must add an external capacitor C1(≤47 μF/100V),to prevent voltage spikes caused by damage to the module. 3. No parallel connection. APPLICATION EXAMPLE MODULES PROTECT RECOMMENDED CIRCUIT High voltage input, Multiple Outputs, with greater load K78U12-500(L) 1 2 3 +Vin GND GND K7805-1000(L) 10 μF +5V/850mA C1 C2 +12V/100mA Reverse protection (figure 3) Note: 1. the input current amount of the back-grade regulator and the pre-class load should be less than or equal the max load current of the pre-class regulator. 2. If further filtering is required, please add components as per the above circuit(We recommend not to add components), if request, please make sure the capacitors C1 ≤47 μF,C2≤10μF more close to the back-grade regulator. K78 UXX-500L () +Vin +Vout GND GND 1 3 2 K78 UXX-50 0L () +Vin +Vout- GND GND 1 3 2 Schottky Diode Vout= 0.3V (figure4) EMC RECOMMENDED CIRCUIT +Vin GND 1.0F μ μF-3.3 0.5mH-2mH 0.68 μF-2.2F μ Vin +Vo ut GND 270 F-4 μ 70 μF RL 0.5mH-2mH 1 2 3 (figure 5) TEST CONFIGURATIONS (TA=25 °C) 1、FULL LOAD OUTPUT RIPPLE & NOISE MEASURED GRAPH 2、LOAD TRANSIENT RESPONSE WAVEFORM (figure 6) (figure 7) |
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