A8180
AiT Semiconductor Inc.
www.ait-ic.com
LED LIGHTING DRIVER
HIGH BRIGHTNESS LED DRIVER WITH INTERNAL SWITCH
DESCRIPTION
FEATURES
Simple low parts count
Internal 32V 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 32V
Output shutdown
Up to 1MHz switching frequency
Inherent open-circuit LED protection
Typical 4% output current accuracy
High-side current sense
Hysteretic control: no compensation
Adjustable constant LED current
Over temperature protection
Available in SOT89-5 package
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 32V 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.
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 SOT89-5 Package.
TYPICAL APPLICATION
ORDERING INFORMATION
Package Type
Part Number
A8180K5R
A8180K5VR
SOT89-5
SPQ: 1,000pcs/Reel
K5
V: Halogen free Package
R: Tape & Reel
Note
AiT provides all RoHS products
REV3.0
- APR 2010 RELEASED, JAN 2017 UPDATED -
- 1 -
AITSEMI [ AiT Semiconductor ]
