ZXLD1362

Input voltage (V_IN) -0.3V to +60V (65V for 0.5 sec)
ISENSE voltage (V_SENSE) +0.3V to -5V (measured with respect to VIN)
LX output voltage (V_LX) -0.3V to +60V (65V for 0.5 sec)
Adjust pin input voltage (V_ADJ) -0.3V to +6V
Switch output current (I_LX) 1.25A

Operating temperature (T_OP) -40 to 125
Storage temperature (T_ST)-55 to 150
Junction temperature (T_{j MAX}) 150
These are stress ratings only. Operation outside the absolute maximum ratings may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliability.

The ZXLD1362 is a continuous mode inductive step-down converter, designed for 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 6V and 60V and provides an externally adjustable output current of up to 1A. Depending upon supply voltage and external components, this can provide up to 48 watts of output power.

The ZXLD1362 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 (dimmed) or a gated output current. Soft-start can be forced 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.