SDAA349 June   2026 TPS7H5001-SP

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Implementation
  6. 3Summary
  7. 4References

2 Implementation

For the TPS7H500X family of devices the current ramp information is done as an input into the CS_ILIM pin.

By grounding the CS_ILIM pin and then changing the value of the RSC resistor, voltage mode can be achieved

The equation below details the RSC resistor value that will allow for the full output range of error amplifier to be used. Values below and above this value will still allow for the converter to run, but being close to this value is advised.

Equation 1. S C = f S W × 2 V

Where fSW is in MHz

Equation 2. R S C = 28.3 S C 1.1

Current limiting is disabled by doing using this method for voltage mode. One method for how to add a current limit is detailed in Space-Grade, Overcurrent Protection Circuit for TPS7H500x-SP Family of Devices Using the INA901-SP

Equations for compensation of voltage mode control a good reference is Switch-mode power converter compensation made easy.

Two designs that use voltage mode control with the TPS7H500X family of devices are the PMP23193 and the PMP23552.