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Specifications subject to change

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TS52003

Version 1.2

FUNCTIONAL DESCRIPTION

The TS52003 is a fully-integrated super capacitor charger IC based on a highly-efficient switching topology. It includes a

Maximum Power Point Tracking (MPPT) function to optimize its input voltage to extract the maximum possible power from a

photovoltaic cell. It includes configurability for termination voltage and charge current. A 1 MHz internal switching frequency

facilitates low-cost LC filter combinations.

When enabled, the TS52003 will provide the maximum power available from a photovoltaic cell until the output voltage

reaches the termination point. At that point, it will begin to regulate voltage. It will do so until a fault is detected, it is disabled

or the output voltage drops below the termination point.

INTERNAL PROTECTION DETAILS

Internal Current Limit

The current through the inductor is sensed on a cycle by cycle basis and if current limit is reached, it will abbreviate the cycle.

Current limit is always active when the regulator is enabled.

Thermal Shutdown

If the temperature of the die exceeds 170C (typical), the SW outputs will tri-state to protect the device from damage. The nFLT

and all other protection circuitry will stay active to inform the system of the failure mode. Once the device cools to 160C

(typical), the device will attempt to start up again. If the device reaches 170C, the shutdown/restart sequence will repeat.

VIN Under-Voltage Lockout

The device is held in the off state until VIN reaches 3.15V. There is a 200mV hysteresis on this input, which requires the input

to fall below 2.95V before the device will disable.

VOUT Over-Voltage Protection

The TS52003 has an output protection circuit designed to shutdown the charging profile if the output voltage is greater than

the termination voltage. The termination voltage can change based on user programming, so the protection threshold is set to

2% above the termination voltage. Shutting down the charging profile puts the TS52003 in a fault condition.