Other Parts Discussed in Thread: SN6507,
I want to design a +-15V circuit with 18~30V(24V) input using SN6507.
SN6507DGQEVM is used, all functions except DC function are set to default, and j7 and j12 jumpers are removed and the installed L is used.(1Mhz, DC_ADJ, EN_H)
Currently, I am checking the input by applying a load using a resistor without connecting the LDO circuit. (The resistance value is 680ohm.)
After changing the J13 Jumper to DC adjust, the Rdc value was calculated and used according to the contents of the DataSheet.
RDC = 0.816 x D x VCC x (RCLK + 1) - 1
RDC = 0.816 x D x 24V x (9600 + 1) -1
RDC = 47Kohm
According to the design, +15V output should come out, but the output voltage from each voltage is as follows.
Input 18V -> Output 9.39V
Input 24V -> Output 11.61V
Input 30V -> Output 14.31V
Since the diode has not been changed yet, it is the initial purchase state of the development board that only outputs +15V.
I want to know what went wrong.