HV9910_07 Supertex, Inc., HV9910_07 Datasheet

HV9910_07

Manufacturer Part Number

HV9910_07

Description

Universal High Brightness LED Driver

Manufacturer

Supertex, Inc.

Datasheet

1.HV9910_07.pdf (8 pages)

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Features

►

Applications

►

Typical Application

>90% Efﬁ ciency

8V to 450V input range

Constant-current LED driver

Applications from a few mA to more than 1A

Output

LED string from one to hundreds of diodes

PWM Low-Frequency Dimming via Enable pin

Input Voltage Surge ratings up to 450V

DC/DC or AC/DC LED Driver applications

RGB Backlighting LED Driver

Back Lighting of Flat Panel Displays

General purpose constant current source

Signage and Decorative LED Lighting

Automotive

Chargers

Universal High Brightness

PWMD

HV9910

GND

GATE

LED Driver

General Description

The HV9910 is a PWM high-efﬁ ciency LED driver control IC.

It allows efﬁ cient operation of High Brightness (HB) LEDs

from voltage sources ranging from 8VDC up to 450VDC.

The HV9910 controls an external MOSFET at ﬁ xed switching

frequency up to 300kHz. The frequency can be programmed

using a single resistor. The LED string is driven at constant

current rather than constant voltage, thus providing constant

light output and enhanced reliability. The output current can

be programmed between a few milliamps and up to more than

1.0A.

The HV9910 uses a rugged high voltage junction isolated

process that can withstand an input voltage surge of up to

450V. Output current to an LED string can be programmed to

any value between zero and its maximum value by applying

an external control voltage at the linear dimming control input

of the HV9910. The HV9910 provides a low-frequency PWM

dimming input that can accept an external control signal with a

duty ratio of 0-100% and a frequency of up to a few kilohertz.

HV9910

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