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Eutech Microelectronics

EUP2586 Datasheet Preview

EUP2586 Datasheet

Asynchronies Boost

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EUP2586
Small Package, High Performance,
Asynchronies Boost for WLED Driver
DESCRIPTION
The EUP2586 is a high frequency, asynchronous boost
converter designed for driving white LED arrays. With
integrated 0.19power switch and 2A current limit,
the EUP2586 provides enough driving capability for
7~10LCD backlighting(13 strings of 3 or 4 LEDs
each). The device uses current mode, fixed frequency
architecture to regulate the LED current, which is
measured through an external current sense resistor. Its
low 200mV feedback voltage reduces power loss and
improves efficiency.
With the built-in over-voltage protection function
(OVP), the SW pin monitors the output voltage and
turn off the device if an over-voltage condition is
present due to an open circuit condition. Other features
include soft start, over-current limiting, thermal
protection and under-voltage lockout.
The EUP2586 is available in the tiny TSOT23-5
package to provide the best solution for PCB space
saving and total BOM cost.
FEATURES
2.6V to 5.5V Input Range
Internal 0.19, 18V MOSFET Switch
High Efficiency Up to 93%
Lower Surface Temperature at ILED=180mA
1MHz Switching Frequency
2A Current Limit
Open LED Overvoltage Protection
Internal Soft-Start
PWM and DC Dimming Control
Available in TSOT23-5 Package
RoHS Compliant and 100% Lead (Pb)-Free
Halogen-Free
APPLICATIONS
7to 10LCD Panels
MID Backlighting
Netbook Backlighting
Portable Media Players
GPS Navigation Systems
Typical Application Circuit
Figure 1. EUP2586 PWM Dimming Application for White LED Driver
DS2586 Ver1.0 Feb. 2012
1




Eutech Microelectronics

EUP2586 Datasheet Preview

EUP2586 Datasheet

Asynchronies Boost

No Preview Available !

Block Diagram
EUP2586Tel: 0755-8398 3377 / 135 9011 2223 http://www.gofotech.com
Pin Configurations
Package Type
TSOT23-5
Figure 2. Block Diagram
Pin Configurations
Pin Description
PIN TSOT23-5
1 SW
2 GND
3 FB
4 EN
5 IN
DESCRIPTION
Switch Pin. This is the drain of the internal power switch. Connect inductor/diode here.
Minimize trace area at this pin to reduce EMI.
Common Ground. Connect the pin to ground plane.
Feedback Pin. Reference voltage is 200mV. Connect cathode of lowest LED and resistor
here. Calculate resistor value according to the formula:
RFB=200mV/ILED
Chip Enable Pin. Connect it to 1.4V or higher voltage to enable device, 0.3V or less
voltage to disable device.
Input Supply Voltage.
DS2586 Ver1.0 Feb. 2012
2


Part Number EUP2586
Description Asynchronies Boost
Maker Eutech Microelectronics
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EUP2586 Datasheet PDF






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