The actual input current limit being adopted by the device is the lower value of IIN_DPM and ILIM_HIZ pin. Register IIN_DPM input current limit value will be updated on below scenarios:

• IIN_DPM() will be updated based on IIN_HOST() value except ICO is executed listed below.
• When adapter is removed, IIN_HOST will be reset to 5 A, host can re-write IIN_HOST to new values after reset under battery only. If the adapter plugs back in and CHRG_OK is pulled up, IIN_HOST will not be reset again. IIN_DPM follows IIN_HOST value in this scenario.
• When input current optimization (ICO) is executed (EN_ICO_MODE=1b), the charger will automatically detect the optimized input current limit based on adapter output characteristic. The final IIN_DPM register setting could be different from IIN_HOST after ICO.

The input current limit function is enabled by default through (EN_IIN_DPM=1b), it can be disabled through setting EN_IIN_DPM=0b. Status bit IN_IIN_DPM is used to report input current under IIN_DPM() regulation.

The input voltage limit is configurable through VINDPM() register bits. Upon POR, VINDPM() default setting is A0h (3.2 V). EC host can rewrite to the target value after POR. There is also DETECT_VINDPM bit to DETECT VINDPM based on VBUS measurement result minus 1.28 V. Write 1b to DETECT_VINDPM bit to start the process, then converter shuts off to measure VBUS. After VBUS measurement is done, VINDPM() is written with value VBUS-1.28 V, DETECT_VINDPM bit goes back to 0 and converter starts up again. Status bit IN_VINDPM is used to report input voltage is under VINDPM regulation.