Dear Sir ,
Use the TPS40057 and find the issue as below , could you plase help it ? Thanks.
- Adjusting the RKFF (R5 of schematic) , RA (R12 of schematic) and CA (C16 of schematic) parameter value for setting the UVLO point.
But , UVLO point don’t change => Whether can adjusting what components or parameter ?
- Vo will drop when Vin is increasing => Found the RKFF (R5 of schematic) will influence it => How to set it for avoid the Vo drop issue ?
Vin < 20Vdc_in that Vo is 4.9Vdc when Io = 2.1A
Vin > 20Vdc_in taht Vo is 4.5Vdc when Io = 2.1A
UVLO table from datasheet as below. Whether the UVLO set point must between 6.95V and 7.95V ?
Ex: IC will occur error information when UVLO more than 7.95V , Right ?
Schematic portion :
