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AXElite

AX2005A Datasheet Preview

AX2005A Datasheet

3A/2APWM Control LED Driver

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AX2005/A
3A/2APWM Control LED Driver with internal
Switch
GENERAL DESCRIPTION
The AX2005/A is a high voltage step-down converter designed for driving up to 10
series white LEDs from a 40V system input. The total LED driving current up to 3A
(AX2005) / 2A(AX2005A), which is measured through an external current sense resistor. Its
low 200mV feedback voltage reduces power loss and improves efficiency. The OVP pin
monitors the output voltage and turns off the converter if an over-voltage condition is
present due to an open circuit condition. The AX2005 includes current limit, short circuit
protection and thermal shutdown protection preventing damage.
AX2005/A provides high power, high efficiency, and excellent transient characteristics.
The PWM control circuit is able to the duty ratio linearly from 0 up to 100%. Since this
converter can accommodate an input voltage up to 40V, it is also suitable for the operation
via an AC adapter.
FEATURES
- Input voltage8V to 40V
- Output voltage is up to 38V
- LED Backlight and High Power LED Application
- Duty ratio0% to 100% PWM control
- LED driving current
AX2005: Output current up to 3A
AX2005A: Output current up to 2A
- Enable/Disable function with soft start time control.
- Current Limit (CL), Thermal Shutdown and Short Circuit Protections (SCP).
- Over Voltage Protection (OVP)
- Built-in internal SW P-channel MOS.
- SOP-8L-EP Pb-Free package.
1/9
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.5 Jan.20, 2016




AXElite

AX2005A Datasheet Preview

AX2005A Datasheet

3A/2APWM Control LED Driver

No Preview Available !

AX2005/A
BLOCK DIAGRAM
EN / SS
CURRENT
SOURCE
BIAS
1.23V
REFERENCE
2.5 V
REGULATOR
START - UP
5uA
VCC
0.2V
Oscillato.r
Current
limit
+
_AMP
COMP.
+
COMP.
OVP
PWM - Switched
Control Circuit
Thermal
Shutdown
VGATE
VSS
FB
COMP
OVP
SW
PIN ASSIGNMENT
The package of AX2005/A is SOP-8L-EP; the pin assignment is given by:
Name
Description
EN/SS ON/OFF Shutdown and Soft-start pin
EN/SS 1
VSS 2
VGATE 3
VCC 4
( Top View )
SW
VSS GND pin
8
COMP
VGATE
Driver GATE clamping pin. The pin must
connect a 1uF capacitor to VCC
7 FB
VCC IC power supply pin
6 OVP
5 SW
SW
Switch pin. Connect external inductor and
diode here.
SOP-8L-EP
FB Feedback pin
COMP Compensation pin
OVP
Over-Voltage Sense Input Pin.
Over Voltage is set by out side Resistance
2/9
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.5 Jan.20, 2016


Part Number AX2005A
Description 3A/2APWM Control LED Driver
Maker AXElite
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AX2005A Datasheet PDF






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