SUPERTEX Introduces HV9918 Charge Pump Mode LED Driver IC

Recently, Supertex introduced the HV9918 charge pump mode LED driver IC, which uses current hysteresis control and high side current detection. It is the ideal driver IC for a variety of solid-state lighting applications, such as low-voltage industrial and architectural LED lighting, signage and decorative lighting, indication and emergency lighting, and can also be used as a universal constant current source.

Main features:

High side current detection hysteresis control integrated 40V, 1.0Ω MOSFET tube efficiency greater than 90% wide voltage 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 working range: -40oC to +125oCHV9918 Typical application circuit is as follows:

The hysteresis control function allows the HV9918 to keep the output constant current to the led string regardless of the input voltage fluctuations.

“Supertex's HV9918 provides fast transient loading response and does not require feedback loop compensation,” said AhmedMasood, vice president of marketing at Supertex. “In-line FET switches reduce the power consumption of the entire system and the space of the pcb board. Current control helps with a variety of LED lighting applications."

The HV9918 is available in an 8-pin DFN package. Comply with green and RoHs standards.

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Discription of ridging machine:

Ridging machine model:1Q1-140

Auxiliary power(ke): 36.8

Geng web(cm): 140

Tillage depth(cm):12-16

Tillage depth:side gear

Tractor connections:three suspension

Tractor PTO speed r/min:540/720

knife shaft speed r/min:196/291

Scope:tobacco,vegetables and other ridge forming

Dimentions(L×W×H)mm:900<span>×1680×1000

Building quality kg:24

PTO flower number key ×outer diameter:8×38mm

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