The HV9861A is a patented, average-mode, constant current control LED driver IC operating in a constant off-time mode. Unlike the HV9910B, this control IC does not produce a peak-to-average error, and therefore greatly improves the accuracy, line and load regulation of the LED current without any need for loop compensation or high-side current sensing. The output LED current accuracy is ±3%. The IC is equipped with a current limit comparator for hiccup-mode output short circuit protection. Internal over-temperature protection is provided. The internally regulated voltage (VDD) for the HV9861A is 7.5 V. The IC can be powered from a 15 - 450 V supply. A PWM dimming input is provided that accepts an external control TTL-compatible signal. The output current can be programmed by an internal 270 mV reference, or controlled externally through a 0 - 1.5 V dimming input. The IC is pin-to-pin compatible with the Supertex HV9910B and HV9961, and can be used as a drop-in replacement for many applications to improve the LED current accuracy and regulation. - Fast average current control - Programmable constant off-time switching - PWM/linear dimming input - Output short circuit protection with skip mode - Ambient operating temperature -40 - +125°C - Pin-compatible with the HV9910B and HV9961 Technical data: - Input voltage: 8 - 450 V - Dimming: PWM - Power: 1000 mW https://elecena.pl/product/9716022/hv9861ang-g-darlington-driver-constant-current-controller-so-16 2017-08-06 https://elecena.pl/product/9716022/hv9861ang-g-darlington-driver-constant-current-controller-so-16 2018-05-04 https://elecena.pl/product/9716022/hv9861ang-g-darlington-driver-constant-current-controller-so-16 2018-12-17 https://elecena.pl/product/9716022/hv9861ang-g-darlington-driver-constant-current-controller-so-16 2019-04-02 https://elecena.pl/product/9716022/hv9861ang-g-darlington-driver-constant-current-controller-so-16 2021-04-26 https://elecena.pl/product/9716022/hv9861ang-g-darlington-driver-constant-current-controller-so-16 2022-07-20 https://elecena.pl/product/9716022/hv9861ang-g-darlington-driver-constant-current-controller-so-16 2022-11-30 https://elecena.pl/product/9716022/hv9861ang-g-darlington-driver-constant-current-controller-so-16 2025-12-27 https://elecena.pl/product/9716022/hv9861ang-g-darlington-driver-constant-current-controller-so-16 2026-01-12