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PDF EUP2530 Data sheet ( Hoja de datos )
| Número de pieza | EUP2530 | |
| Descripción | 10 White LED Boost Converter | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de EUP2530 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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EUP2530
bkf 10 White LED Boost Converter with PWM
Dimming and Single-Wire Series Interface
DESCRIPTION
The EUP2530 is a constant current step-up converter
specifically designed to drive white LEDs. With a 45V
rated integrated switch FET, the step-up converter
supports up to 10 white LEDs in series connection, so
the LED currents are identical for uniform brightness.
The boost converter runs at 1.0MHz fixed switching
frequency with 1.3A switch current limit, and allows
for the use of a high brightness LED in general lighting.
The maximum white LED current is set with the
external sensor resistor RFB, and the feedback voltage is
regulated to 200mV, as shown in the typical application.
During the operation, the LED current can be
controlled through the EN pin in two modes. With a
8KHz or higher frequency PWM dimming signal on
EN pin, EUP2530 operates in PWM dimming mode,
which the duty cycle determines the feedback reference
voltage. EUP2530 can operate in digital dimming mode
also, which a Single Wire interface on the EN pin is
integrated to adjust the FB voltage in 32 steps. In either
digital or PWM mode, the EUP2530 does not generate
audible noises on the output capacitor. For the
protection, the EUP2530 provides 41V OVP to prevent
damage from LED open.
The EUP2530 is available in low profile TSOT23-6
package.
Typical Application Circuit
FEATURES
2.6V to 5.5V Input Range
41V Output Over Voltage Protection
Internal Soft-Start
Internal Compensation
Single-Wire Serial Pulse Interface to Set LED
Current with 32-Step Scale
External PWM Dimming with 8KHz - 100KHz
Frequency Range
Internal 45V N-FET
1MHz Fixed Switching Frequency
Over Voltage Protection
Over Thermal Protection
VIN Under Voltage LockOut
Available in TSOT23-6 Package
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
APPLICATIONS
Mobile Phones
GPS Navigation Systems
Portable Media Players
Handheld Devices, Digital Camera
Portable Game Machines
DS2530 Ver1.0 Sep. 2012
Figure 1. White LED Application
1
1 page  
EUP2530
Typical Operating Characteristics
Unless others specified, VIN=3.6V, L=10µH, CIN=4.7µF, COUT=1µF, RFB=10ohm, ILED=20mA,
LED Array:10S1P
Efficiency vs. VIN
90%
Single Wire Dimming
200
85%
80% 150
75%
100
70%
65%
ILED=20m A LED=6
ILED=30m A LED=6
60%
ILED=20m A LED=10
ILED=30m A LED=10
55%
2.5 3 3.5 4 4.5 5 5.5
VIN(V)
50
0
0
10 20
CODE
30
Thermal vs. VIN@ILED=20mA
48
43
38
33
28
2.5
3.5 4.5
VIN(V)
5.5
VIN=3.6V EN Direct PWM Dimming vs. ILED
20
15
10 F=8K
F=10K
0
F=20K
5 F=50K
F=80K
F=100K
0
0 20 40 60 80 100
PW M DUTY(%)
VIN=3.6V Soft Start
2ms/div
VEN=3.6V
2V/div
VOUT
10V/div
VFB
100mV/div
IIN
200mA/div
VIN=3.6V EN Turn Off
2ms/div
VEN=3.6V
2V/div
VOUT
10V/div
VFB
100mV/div
IIN
200mA/div
DS2530 Ver1.0 Sep. 2012
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet EUP2530.PDF ] | |
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