Infineon Technologies is servicing the market for indoor and outdoor LED illumination with the introduction of the new ILD4xxx family of switch-mode LED drivers.
The first member of this family is the ILD4035, a hysteretic step-down LED driver IC for general lighting applications. The internal switch is capable of driving a series of 1 W LEDs with 350 mA typical output current. The IC offers a wide input voltage range (4,5 V–42 V) and an adjustable output current via an external current sense resistor. With a multifunctional control pin, the IC can be switched on and off by an external signal that regulates the brightness of the LEDs by PWM or DC voltage dimming.
The precise internal bandgap stabilises the circuit and provides stable LED current over the operating temperature range. Furthermore, over-voltage and short circuit protection as well as the integrated reversible temperature shutdown mechanism help to protect the LED system.
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