SLVSE17A May 2019 – April 2020 TPS1HB16-Q1
All versions of the TPS1HB16-Q1 include an adjustable current limit. Some applications (for example, incandescent bulbs) will require a high current limit while other applications can benefit from a lower current limit threshold. In general, wherever possible a lower current limit is recommended due to allowing system advantages through:
To set the current limit threshold, connect a resistor from ILIM to VBB. The current limit threshold is determined by Equation 1 (RILIM in kΩ):
The RILIM range is between 5 kΩ and 25 kΩ. An RILIM resistor is required, however in the fault case where the pin is floating, grounded, or outside of this range the current limit will default to an internal level that is defined in the Specifications section of this document. If RILIM is out of this range, the device cannot guarantee complete short-circuit protection.
Capacitance on the ILIM pin can cause ILIM to go out of range during short circuit events. For accurate current limiting, place RILIM near to the device with short traces to ensure <5 pF capacitance to GND on the ILIM pin.