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AX2020 Datasheet Preview

AX2020 Datasheet

1A Step-down High Brightness LED Driver

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AX2020
32V,1A Step-down High Brightness
LED Driver with 5000:1 Dimming
GENERAL DESCRIPTION
The AX2020 is a continuous conduction mode inductive step-down converter, designed
for driving single or multiple series connected LED efficiently from a voltage source higher
than the total LED chain voltage. The device operates from an input supply between 8V and
32V and provides an externally adjustable output current of up to 1A. Depending upon the
supply voltage and external components, the AX2020 can provide more than 15 watts of
output power. The AX2020 includes the power switch and a high-side output current sensing
circuit, which uses an external resistor to set the nominal average output current, and a
dedicated DIM input accepts a wide range of pulsed dimming. Applying a voltage of 0.3V or
lower to the DIM pin turns the output off and switches the device into a low current standby
state.
The AX2020 is available in SOT89-5L package.
FEATURES
- Simple low parts count
- Wide input voltage range: 8V to 32V
- Up to 1A output current
- Single pin on/off and brightness control using PWM
- Up to 1MHz switching frequency
- Typical 5% output current accuracy
- High-Side Current Sense
- Hysteretic Control: No Compensation
- Adjustable Constant LED Current
1/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Jun.10, 2014




AXElite

AX2020 Datasheet Preview

AX2020 Datasheet

1A Step-down High Brightness LED Driver

No Preview Available !

AX2020
BLOCK DIAGRAM
VIN
V25
CSN
70µ
CS
- COMPARATOR
+
130mV
2.5V -
+
UVLO
COMPARATOR
DIM
DIM
BUFFER
SW
GATE
DRIVER
Driver
GND
PIN ASSIGNMENT
The package of AX2020 is SOT89-5L; the pin assignment is given by:
VIN (Top View) CSN
5 GND 4
Name
SW
GND
Description
Switch Output. SW is the output of
the internal driver switch.
Signal and power ground. Connect
directly to ground plane.
AX2020
Logic level dimming input. Drive
DIM
DIM low to turn off the current
regulator. Drive DIM high to enable
12 3
the current regulator.
SW GND DIM
SOT89-5L
CSN Current sense input
VIN
Input Supply Pin. Must be locally
bypassed.
ORDER/MARKING INFORMATION
Order Information
AX2020 XX X
Package Type
F5: SOT89-5L
Packing
Blank : Tube
A : Taping
Top Marking
20 2 0
YWX
Part number
ID code: internal
WW: 01~26 (A~Z)
27~52 (a~z)
Year: A=2010
1=2011
2/11
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.3 Jun.10, 2014


Part Number AX2020
Description 1A Step-down High Brightness LED Driver
Maker AXElite
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AX2020 Datasheet PDF






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