Hi7330

The Hi7330 is a buck LED constant-current driver with wide dimming ratio, flicker-free dimming, and a minimal peripheral circuit design, suitable for LED constant-current lighting applications with an input voltage range of 6.5–75V. Utilizing a patented algorithm, it achieves high-precision constant-current regulation with output current accuracy ≤±3% and load regulation <±0.5%, easily meeting the demands of wide input/output voltage applications with flicker-free dimming throughout the entire dimming range. PWM dimming supports high-brightness applications with dimming frequencies above 100Hz and a resolution exceeding 100:1, with no flicker throughout the entire dimming range. The output current is set via a current-sense resistor between the ISENSEN and ISENSEP pins, supporting buck common-anode topology. Over-temperature current derating and overcurrent protection are also supported.

Applications

• 0~10V dimming
• DALI dimming
• Smart lighting
• Medical lighting

Key features

• 100:1 dimming ratio
• Operating voltage range: 6.5–75V
• Conversion efficiency >95%
• Load regulation <±0.5%
• Low standby power consumption
• True flicker-free dimming
• Dimming frequency up to 32kHz
• PWM-to-analog conversion support
• Integrated 80V LDO power supply
• Constant current accuracy ≤±3%
• Over-temperature current derating
• Package: ESSOP10