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AP3790MTR-G1 Datasheet(PDF) 10 Page - Diodes Incorporated |
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AP3790MTR-G1 Datasheet(HTML) 10 Page - Diodes Incorporated |
10 / 17 page AP3790 Document number: DS37221 Rev. 3 - 2 10 of 17 www.diodes.com October 2014 © Diodes Incorporated AP3790 A Product Line of Diodes Incorporated Operation Principle Description (Cont.) Output Voltage Selection Section The output voltage of AP3790 can be adjusted based on the patterns of load current aligned to MTK Pump Express protocol. The voltage of CPC pin of AP3790 is changed with the load current. AP3790 can detect the load current patterns through CPC pin. The pattern of decrease output voltage is shown in Figure 5 and the pattern of increase output voltage is shown in Figure 6. VCPC_L VCPC_H tON_B tON_C tON_A tOFF_D Figure 5 The Pattern of Decrease Output Voltage tON_A tON_B tON_C tOFF_D VCPC_L VCPC_H Figure 6 The Pattern of Increase Output Voltage Just shown as Figure 7, the voltage is changed step by step among 4.8V and 3.6V. When the AP3790 detects one full pattern of decrease output voltage, the output voltage will decrease 0.2V from the current voltage level. When the output voltage is 3.6V, the pattern of decrease output voltage is invalid. When the AP3790 detects one full pattern of increase output voltage, the output voltage will increase 0.2V from the current voltage level. When the output voltage is 5V, the pattern of decrease output voltage is invalid. At any voltage level among 4.8V to 3.6V, once the WDT function (VCPC<VCPC_L and the time of duration is more than tWDT.) is triggered, the output voltage will return to 5V directly. And At any voltage level among 4.8V to 3.6V, once any protect function is triggered, the output voltage will return to 5V directly. Figure 7. Voltage State Flow 5V 4.8V 4.6V 4.4V 4.2V 4.0V 3.8V 3.6V WDT WDT Control Pattern |
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