I need help to understand the circuit below.
VOUT : 3.7V to 5V
VREG_MOD(from MCU) to FB : 0V to 3.3V
"Dynamically Adjustable Output Using TPS63000" are slightly different form below.
| TPS63050 | VOUT | - | - | - | - | - | - | OUT |
| | | | | |||||||
| 1M | 180K | |||||||
| | | | | |||||||
| FB | - | 180K | - | 18K | - | - | MOD | |
| | | ||||||||
| 8.2K | ||||||||
| | | ||||||||
| GND |
In this case, I want know how it works. and what is considered as R1, R2, R3
Thanks.
Hello ,
Thanks for reaching ot to us via e2e.
Basically, all you do is adding an additional offset voltage to the low side resistor of the feedback coltage divider.
You need to scale the DAC voltage, so that it matches your needs.
Our Power Stage Designer tool supports the calculation. You can download it from here:
www.ti.com/.../POWERSTAGE-DESIGNER
After selecting the topology, go to Tools -> Output Voltage Scaling and select the Dynamic Analog Output Voltage Scaling Tab.
Best regards,
Harry
