SUPERTEX Introduces HV9918 Charge Pump Mode LED Driver IC
Recently, Supertex introduced the HV9918 charge pump mode LED driver IC with current hysteresis control and high-side current sensing. It is ideal for a wide range of solid-state lighting ICs, such as low-voltage industrial and architectural LED lighting, signs and decorative lighting, indicating and emergency lighting, but also can be used as a universal constant current source. Key Features: High-Side Current-Sense Hysteresis Control Integrated 40V, 1.0Ω MOSFETs Greater than 90% Tube Efficiency Wide Input Range: 4.5V to 40V ± 5% LED Current Accuracy Up to 2MHz Switching Frequency Adjustable LED Constant Current Analog or PWM Control signal PWM dimming over-temperature protection Operating range: -40 ℃ to +125 ℃ Hysteresis control function to make HV9918 no matter how the input voltage fluctuations, but also to maintain the output constant current to led light string. "Supertex's HV9918 provides fast transient load response without the need for feedback loop compensation," said Ahmed Masood, Supertex's vice president of marketing. "The embedded FET switches reduce overall system power consumption and pcb board space, high Accurate current control helps with a wide range of LED lighting applications. "The HV9918 is available in an 8-pin DFN package. Meet the green and RoHs standards.
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