ZXLD1360: 1A LED driver with internal switch

driving single or multiple series connected LEDs efficiently from a voltage source higher
than the LED voltage. The device operates from an input supply between 7V and 30V and
provides an externally adjustable output current of up to 1A. Depending upon supply
voltage and external components, this can provide up to 24 watts of output power.
The ZXLD1360 includes the output switch and a high-side output current sensing circuit,
which uses an external resistor to set the nominal average output current.
Output current can be adjusted above, or below the set value, by applying an external
control signal to the 'ADJ' pin.

The ADJ pin will accept either a DC voltage or a PWM waveform. Depending upon the control frequency, this will provide either a continuous or a gated output current. The PWM filter components are contained within the chip.
The PWM filter provides a soft-start feature by controlling the rise of input/output current. The soft-start time can be increased using an external capacitor from the ADJ pin to ground.
Applying a voltage of 0.2V or lower to the ADJ pin turns the output off and switches the device into a low current standby state.