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PDF AX2005 Data sheet ( Hoja de datos )
| Número de pieza | AX2005 | |
| Descripción | 3A/2APWM Control LED Driver | |
| Fabricantes | AXElite | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AX2005 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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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 voltage：8V to 40V
- Output voltage is up to 38V
- LED Backlight and High Power LED Application
- Duty ratio：0% 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/A
APPLICATION CIRCUIT
1. Normal application circuit (step-down)
VIN
C1
220uF
C2
0.1uF
C3
1uF 20K
R3
8.2K
U1 AX2005/A
4 VCC
SW 5
3 VGATE
7
FB
2 VSS
COMP 8
1 EN/SS
OVP 6
C6
0.1uF
R2
100Ω
C7
15n
Dimming
100Hz-50KHz
D2
DIODE
VFB = 0.2V
ILED = VFB/R5
R1
VOVP (OVP) = 0.85× (1+ )
R4
L1 33uH
D1
B340 ILED
LED-1
LED-N
VOUT
R1 C4 C5
470uF 0.1uF
R5
0.6Ω
R4
COUT ESR Range R2 C7
30~80mΩ 470R 10nF
80~300mΩ 100R 15nF
2. AC input application circuit (Inverting)
AC adapter
Bridge rectifier
C1
220uF
C2
0.1uF
C4
100uF
C3
1uF 20K
R3
8.2K
U1 AX2005/A
4 VCC
SW 5
3 VGATE
FB 7
2 VSS
COMP 8
1 EN/SS
OVP 6
C6
0.1uF
R4
R2
560Ω
C7
R1 33nF
VFB = 0.2V
ILED = VFB/R5
R1
VOVP (OVP) = 0.85× (1+ )
R4
L1 33uH
D1
B340
ILED
LED-1
LED-2
LED-3
C5
0.1uF
LED-4
R5
0.6Ω
VOUT
Part No.
AX2005/A
ILED
350mA
750mA
1000mA
0.57Ω
0.266Ω
0.2Ω
R5
70mW
150mW
200mW
C1
100uF
220uF
330uF
L1
33uH
5/9
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.4 Jul.06, 2010
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet AX2005.PDF ] | |
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