ILD4035 12V BOARD
Evaluation board for high power LEDs at 12DC voltage input using ILD4035
The ILD4035 12V Board’s sense resistance is optimized to drive a string of 3 series LEDs at 350mA (max current) with an input voltage of 12V. ILD4035 maintains a constant current through a string of LEDs as long as the input voltage exceeds the sum of the forward voltages of the LEDs in the string by at least 3V. The maximum input voltage for this demonstration board must not exceed 30V; this restriction is due to the schottky diode installed which has a reverse breakdown voltage of 30V. If there is a need to test the board with a maximum supply voltage of 40V, please replace the schottky diode SD1 with a suitable breakdown voltage. The board includes a “Multifunctional Pin” input terminal for digital or analog dimming control signal. PWM dimming frequencies up to 300Hz at 100:1 contrast ratio and at 100Hz contrast ratio of 300:1 are possible. Although a wide variety of LED combinations and currents can be driven with the ILD4035, the sense-resistors have to be altered to achieve maximum current of 350mA and inductance has to be changed to attain recommended switching frequencies below 500 kHz.
- Wide Input Voltage Range: 4.5 V ... 40 V
- Internal switch for up to 400 mA average LED
- Over current protection
- Over voltage protection
- Temperature protection mechanism
- Inherent open-circuit LED protection
- Soft-start capability
- Low shut down current
- Analog and PWM dimming possible
- Typical 3% output current accuracy
- Minimum external component required
- Small Package: SC74
- LED general lighting
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