LT3652EDD#TRPBF

The LT3652EDD is a complete monolithic step-down battery charger that operates over a 4.95V to 32V input voltage range. The LT3652EDD provides a constant-current/constant-voltage charge characteristic, with maximum charge current externally programmable up to 2A. The charger employs a 3.3V float voltage feedback reference, so any desired battery float voltage up to 14.4V can be programmed with a resistor divider.

The LT3652EDD employs an input voltage regulation loop, which reduces charge current if the input voltage falls below a programmed level, set with a resistor divider. When the LT3652EDD is powered by a solar panel, the input regulation loop is used to maintain the panel at peak output power.

The LT3652EDD can be configured to terminate charging when charge current falls below 1/10 of the programmed maximum (C/10). Once charging is terminated, the LT3652EDD enters a low-current (85μA) standby mode. An auto-recharge feature starts a new charging cycle if the battery voltage falls 2.5% below the programmed float voltage. The LT3652EDD also contains a programmable safety timer, used to terminate charging after a desired time is reached. This allows top-off charging at currents less than C/10.

VIN MaxVFLOAT MaxFeaturesLT365232V14.4VInternal Reverse Blocking VBAT < 4.2VLT3652HV34V18VQFN-32

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