DatasheetsPDF.com

A8181

AiT Semiconductor
Part Number A8181
Manufacturer AiT Semiconductor
Description HIGH BRIGHTNESS LED DRIVER
Published May 29, 2015
Detailed Description AiT Semiconductor Inc. www.ait-ic.com   A8181 36V, 1.2A LED STEP-DOWN HIGH BRIGHTNESS LED DRIVER WITH INTERNAL SWITCH ...
Datasheet PDF File A8181 PDF File

A8181
A8181

Overview
AiT Semiconductor Inc.
www.
ait-ic.
com   A8181 36V, 1.
2A LED STEP-DOWN HIGH BRIGHTNESS LED DRIVER WITH INTERNAL SWITCH   DESCRIPTION The A8181 is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage.
The device operates from an input supply between 6V and 36V and provides an externally output current up to 1.
2A.
Depending upon supply voltage and external components, this can provides up to 24 watts of output power.
The A8181 includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current.
FEATURES  Simple low parts count  Internal 36V NDMOS switch  Up to 1.
2A output current  Single pin on/off and brightness control using DC voltage or PWM  Soft Start  High efficiency (up to 97%)  Wide input voltage range: 6V to 36V  Output shutdown  Up to 1MHz switching frequency  Inherent open-circuit LED protection  Typical 3% output current accuracy  High-side current sense  Hysteretic control: no compensation  Adjustable constant LED current  Over temperature protection  Available in SOT-25 package Output current can be adjusted by applying an external control signal to the 'ADJ' pin.
The ADJ pin will accept either a DC voltage or a PWM waveform.
During DC dimming, this will provide a continuous output current that is proportional to the external applied DC voltage.
During the PWM dimming, this will provide a gated output current and the average current is proportional to the duty cycle.
Applying a voltage of 0.
2V or lower to the ADJ pin turns the output off and switches the device into a low current standby state.
APPLICATIONS  Low voltage halogen replacement LEDs  Automotive lighting  Low voltage industrial lighting  LED back-up lighting  Illuminated signs  LCD TV backlighting TYPICAL APPLICATION The A8181 is available in SOT-25 Packages.
ORDERING ...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)