HV9980
Features
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- 3-Channel LED Array Driver IC
Integrated 200V, 25Ω (typ.) MOSFETs Programmable output current to 80m A per channel TTL patible PWM dimming inputs 3-Phase synchronous operation Leading edge blanking Short circuit protection with skip mode Over-temperature protection illumination. The output currents are programmed by controlling peak source current in each of the three internal 200V, 25Ω switching MOSFETs. The peak current is detected by monitoring voltage at external sense resistors connected to RSENSE1-3. The switching MOSFET is turned off when the corresponding current sense signal exceeds the reference voltage applied at REF1-3 (in the case of normal output signal polarity). Beginning of the next switching cycle is determined by the external clock signal received at the CLK input. All three channels operate at a switching frequency of 1/6 of the external clock frequency and positioned 120º out-of-phase for the purpose of input and output ripple current...
