JAJSRI9A October 2023 – March 2024 LM51772
ADVANCE INFORMATION
The device features two high voltage current sensors. The first one maintains the peak current sensing between the CSA and CSB pins. The second current sensor inputs are connected to the ISNSP and ISNSN pins. This optional current sensing provides the capability to monitor (CDC-pin) and limit (ILIMCOMP-pin) either the input or the output current of the DC/DC converter.
If the optional current sense amplifier is not used, the customer can connect the ILIMCOMP pin to VCC2 to turn the bias current consumption of this block and all current limiting/monitoring functions off. It is not recommended to do this dynamical during the operation of the device because the configuration gets latched at start-up of the converter. In other words the current monitoring block cannot be disabled dynamically the pin information gets latched until the next EN, EN_CONV or V(POR) power cycle. It is recommended to directly connect the ILIMCOMP to VCC2 or with a pull-up resistor < 50kΩ.
Use the CFG pins or register table to select the following desired operation modes: