A8180 Datasheet PDF


Part Number

A8180

Description

1.4A STEP-DOWN LED DRIVER

Manufacture

AiT Semiconductor

Total Page 20 Pages
PDF Download
Download A8180 Datasheet PDF


Features Datasheet pdf AiT Semiconductor Inc. www.ait-ic.com A 8180 36V, 1.4A STEP-DOWN LED DRIVER HIG H BRIGHTNESS WITH INTERNAL SWITCH DESC RIPTION The A8180 is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a volta ge source higher than the LED voltage. The device operates from an input suppl y between 6V and 36V and provides an ex ternally output current up to 1.4A. Dep ending upon supply voltage and external components, this can provides up to 24 watts of output power. The A8180 inclu des the output switch and a high-side o utput current sensing circuit, which us es an external resistor to set the nomi nal average output current. Output c.
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A8180 Datasheet
AiT Semiconductor Inc.
www.ait-ic.com
A8180
36V, 1.4A STEP-DOWN LED DRIVER
HIGH BRIGHTNESS WITH INTERNAL SWITCH
DESCRIPTION
The A8180 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 1.4A. Depending upon supply
voltage and external components, this can provides up
to 24 watts of output power.
The A8180 includes the output switch and a high-side
output current sensing circuit, which uses an external
resistor to set the nominal average output current.
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.
FEATURES
Simple low parts count
Internal 36V NDMOS switch
Up to 1.4A 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-89-5 and SOP8 packages
APPLICATIONS
Low voltage halogen replacement LEDs
Automotive lighting
Low voltage industrial lighting
LED back-up lighting
Illuminated signs
LCD TV backlighting
The A8180 is available in SOT-89-5 and SOP8
Packages.
TYPICAL APPLICATION
ORDERING INFORMATION
Package Type
Part Number
SOT89-5
SOP8
Note
K5
A8180K5R
A8180K5VR
M8
A8180M8R
A8180M8VR
V: Green Package
R : Tape & Reel
AiT provides all Pb free products
Suffix “ V “ means Green Package
REV1.1
- APR 2010 RELEASED, MAR 2011 REVISED -
-1-




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