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Microchip HV9967BDB1

4W LED Driver Demoboard with Accurate Average-Mode Constant Current Control

Overview

TopologyBuck Converter
Input voltage20-60 V
Output 115 V / 0.35 A

Description

The HV9967BDB1 demoboard is a high-brightness LED driver designed to drive 4 LEDs in series at currents up to 350mA from a 20 - 60V DC input. The demoboard uses the Supertex’s HV9967B in a buck configuration in a constant off-time mode.

The HV9967BDB1 LED driver features tight regulation of the LED current within a few milliamps over the entire range of the input voltage (i.e. 20 - 60VDC). The LED current accuracy is almost insensitive to the passive component tolerances,such as the output filter inductance or the timing resistor.

PWM dimming can be achieved by applying a pulse-widthmodulated square wave signal between the PWMD and GND pins.

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT
(A)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples
744777233SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-PD SMT Power Inductor 330 0.64 0.45 1860 4 7345 Standard
Order Code Data­sheet Simu­lation
744777233SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT
(A)
RDC max.
(mΩ)
fres
(MHz)
SizeVersion Samples