Microchip

HV9910C

Universal High-Brightness LED Driver

Topologie: Other
Schaltfrequenz (min.): 80.00 kHz
Schaltfrequenz (max.): 120.00 kHz

Beschreibung

HV9910C is an open-loop, current-mode control, LED driver IC. This IC can be programmed to operate in either a constant frequency or constant off-time mode. It includes a 15 – 450V linear regulator which allows it to work with a wide range of input voltages without the need for an external low voltage supply. HV9910C includes a TTL-compatible, PWM-dimming input thatcan accept an external control signal with a duty ratio of 0 – 100% and a frequency of up to a few kilohertz. It also includes a 0 – 250mV linear-dimming input which can be used for linear dimming of the LED current.Unlike the HV9910B, the HV9910C is equipped with built-in thermal-shutdown protection. HV9910C is ideally suited for buck LED drivers. Since the HV9910C operates in open-loop current mode control, the controller achieves good output current regulation without the need for any loop compensation. Also,being an open-loop controller, PWM-dimming response is limited only by the rate of rise of the inductor current, enabling a very fast rise and fall times of the LED current. HV9910C requires only three external components (apart from the power stage) to produce a controlled LED current. This makes HV9910C an ideal solution for low-cost LED drivers.

Merkmale

  • Switch mode controller for single switch LED drivers• Enhanced drop-in replacement to the HV9910B• Open loop peak current controller• Internal 15 to 450V linear regulator• Constant frequency or constant off-time operation• Linear and PWM dimming capability• Requires few external components for operation• Over-temperature protection

Artikel

  Artikel Nr. SPEC Produktserie L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Muster
744770268 PDF
7687709222 PDF WE-PD HV SMT Speicherdrossel (High Voltage) 2200 0.43 0.65 3100 3700 0.8