TPS2HCS10-Q1 datasheet(22/121 Pages) TI2

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• Immediate shutdown overcurrent protection (IOCP)

• Programmable fuse protection (or I2T protection) (if enabled)

• Thermal shutdown (TREL and TABS)

• Short-circuit protection (ISCP_LPM_MAN or ISCP_LPM_AUTO) in LPM states

In regards to overcurrent protection, the device has two operation modes, an optional inrush period at channel

startup and during steady state operation. The optional inrush period can be configured to allow the device

to handle different inrush currents such as bulbs, motor stall currents, or capacitive loads at the initial turn

on of a channel. The CAP_CHRG_CHx, INRUSH_DURATION_CHx, and INRUSH_LIMIT_CHx bits in the

ILIM_CONFIG_CHx registers control the operation of the device in the inrush period. I2T protection (if enabled)

is only active in the inrush period if CAP_CHRG_CHx = 00 and if VDS < VDS_LT_2V. Steady state operation takes

over after the inrush period has completed. During steady state operation, overcurrent protection (IOCP) is active

and I2T protection is active (if enabled).

During the inrush period all voltage sensing (VBB, VOUT, and VDS) and FET temperature sensing can be used

if enabled. Current sensing is only available in CAP_CHRG_CHx = 00 when VDS < VDS_LT_2V or after the inrush

period has completed and the device is in steady state operation. All voltage sensing, FET temperature sensing,

and current sensing is available in the steady operation.

Figure 8-4 provides an overview of the overcurrent protection in the optional inrush period and steady state

operation.

For more details on the different protections available in the inrush period and in steady state, see the following

sections. Overcurrent protection in the LPM states is covered in the LPM section.

CHx_ON

VOUTx

<0b0>

<0b1>

IOUTx

Steady state opera on

Protec on

- overcurrent protec on (IOCP) set by ILIMIT_SET_CHx

- I2T protec on (if enabled)

Diagnos cs

- ISNS is available

- VDS_SNS, TSNS, VSNS, and VBBSNS are available

Figure 8-4. Overcurrent Protection Modes Overview

8.3.1.1.1 Inrush Period - Overcurrent Protection

The inrush period is an optional mode of the device where it can be configured to allow the device to handle

different inrush currents such as bulbs, motor stall currents, or capacitive loads at the initial turn on of a

channel. The inrush period can be configured through the CAP_CHRG_CHx, INRUSH_DURATION_CHx, and

TPS2HCS10-Q1

SLVSGY2A – OCTOBER 2023 – REVISED OCTOBER 2025

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