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AX2005 の電気的特性と機能

AX2005のメーカーはAXEliteです、この部品の機能は「3A/2APWM Control LED Driver」です。


製品の詳細 ( Datasheet PDF )

部品番号 AX2005
部品説明 3A/2APWM Control LED Driver
メーカ AXElite
ロゴ AXElite ロゴ 




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AX2005 Datasheet, AX2005 PDF,ピン配置, 機能
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.1.4 Jul.06, 2010

1 Page





AX2005 pdf, ピン配列
AX2005/A
ORDER/MARKING INFORMATION
Order Information
Top Marking
AX2005 X XX X
Output Current Package Type Packing
Blank : 3A
ES: SOP-8L-EP Blank : Tube
A : 2A
A : Taping
Logo AX 2 0 0 5
A YYWWX
Part number
ID code: internal
WW: 01~52
Year: 10=2010
11=2011
Blank: AX2005
A: 2005A
ABSOLUTE MAXIMUM RATINGS (at TA = 25°C)
Characteristics
Symbol
Rating
Unit
VCC Pin Voltage
VCC VSS - 0.3 to VSS + 45 V
Feedback Pin Voltage
VFB VSS - 0.3 to 6 V
EN/SS Pin Voltage
VEN/SS
VSS - 0.3 to 6
V
OVP Pin Voltage
VOVP
VSS - 0.3 to VCC
V
COMP Pin Voltage
VCOMP
VSS - 0.3 to 6
V
VGATE Pin Voltage
VGATE
VSS - 0.3 to VCC
V
Switch Pin Voltage
VSW VSS - 0.3 to VCC + 0.3 V
Power Dissipation
PD Internally limited mW
Storage Temperature Range
TST -65 to +150 °C
Operating Junction Temperature Range
TOJP -40 to +125 °C
Operating Supply Voltage
VOP 8 to 40 V
Output Voltage
VOUT
38
V
Thermal Resistance from Junction to case θJC 15 °C/W
Thermal Resistance from Junction to ambient
θJA
40 °C/W
Note: θJA is measured with the PCB copper area(need connect to Exposed Pad) of approximately 1.5 in2(Multi-layer).
3/9
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.4 Jul.06, 2010


3Pages


AX2005 電子部品, 半導体
AX2005/A
FUNCTION DESCRIPTIONS
EN/SS
This pin can be supplied shutdown or soft start function. It is inside pull high function.
For normal application, the pin must be connected a capacitor to ground. There is a 5uA
current to charge this capacitor, vary the different capacitor value to control soft start time.
Allow the switching regulator circuit to be shutdown pulling this pin below a 0.8V threshold
voltage; the shutdown supply current is approximately 150uA.
PWM Control
The AX2005/A consists of DC/DC converters that employ a pulse-width modulation
(PWM) system. In converters of the AX2005/A, the pulse width varies in a range from 0 to
100%, according to the load current. The ripple voltage produced by the switching can
easily be removed through a filter because the switching frequency remains constant.
Therefore, these converters provide a low-ripple power over broad ranges of input voltage
and load current.
Current Limiting
The current limit threshold is setting by the internal circuit.
Compensation
In all LED driver applications. Connecting a resistor (R2) and a capacitor (C7) from
COMP pin to GND. Please refer the application circuit table to design.
APPLICATION INFORMATION
Setting the LED Current
Application circuit item shows the basic application circuit with adjustable output
version. The external resistor sets the output voltage according to the following equation:
ILED
=
( VFB
R5
),
VFB
=
0.2V
Table 1 Resistor select for LED output current setting
ILED R5
350mA
0.57Ω
70mW
750mA
0.266Ω
150mW
1000mA
0.2Ω
200mW
6/9
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.4 Jul.06, 2010

6 Page



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