DC/DC Converter. EMD2050 Datasheet

EMD2050 Converter. Datasheet pdf. Equivalent

Part EMD2050
Description PWM Step-Up DC/DC Converter
Feature ESMT/EMP EMD2050 PWM Step-Up DC/DC Converter for Panel Backlight General Description The EMD2050 .
Manufacture ESMT
Datasheet
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ESMT/EMP EMD2050 PWM Step-Up DC/DC Converter for Panel Bac EMD2050 Datasheet
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EMD2050
ESMT/EMP
EMD2050
PWM Step-Up DC/DC Converter for Panel Backlight
General Description
The EMD2050 designed with high efficiency step up
DC/DC converter for driving white LEDs. The device
can drive up 3 white LEDs from a single Li-Ion battery
or a DC power 2.5V to 5.5V. The EMD2050 uses
current mode and pulse-width modulated (PWM)
operation. It switches at 1.2MHz and allows using
small inductor and both of input/output capacitors.
An internal compensation can reduce external
component.
The EMD2050 include under-voltage lockout, current
limit, over voltage and thermal shutdown protection.
The EMD2050 is available in SOT-26 package.
Features
„ WLEDs supports (20mA for each channel):
„ Up to 3S13P at VIN=3.7V
„ Up to 3S18P at VIN=5.0V
(Note: SÆ Series; PÆ Parallel)
„ Low Quiescent Current: 55 μA
„ Over Voltage Protection: 15V
„ Inherently Matched LED Current
„ Shutdown Current < 1μA
„ Reference Voltage 0.235V
„ Efficiency : 85% (Typ) at VIN=5.0V
„ PWM Dimming Control
„ Internal Soft Start and Compensation
„ Low Profile SOT-26 Package
Applications
„ Mobile Phone
„ Digital Still Cameras
„ Portable applications
„ MP3 Players
„ GPS Receivers
Typical Application (3S13P)
Fig.1
Elite Semiconductor Memory Technology Inc. /Elite MicroPower Inc.
Publication Date: Oct. 2009
Revision: 1.0
1/12



EMD2050
ESMT/EMP
Connection Diagram
IN OUT EN
65 5 4
SOT-26
123
LX GND FB
EMD2050
Order Information
EMD2050-00VC06NRR
00 Output voltage
VC06 SOT-26 Package
NRR RoHS & Halogen free package
Rating: -40 to 85°C
Package in Tape & Reel
GRR RoHS Package (By Request)
Order, Mark & Packing Information
Package
SOT-26
Vout
Adjustable
Product ID
Marking
IN OUT
65 5
EN
4
EMD2050-00VC06NRR
2050
Tracking Code
PIN1 DOT
123
LX GND FB
Packing
Tape & Reel
3Kpcs
Pin Functions
Pin Name
SOT-26
Pin #
LX 1
GND
2
FB 3
EN 4
OUT 5
IN 6
Function
Switch Pin.
Connect inductor/diode here.
Ground Pin.
Feedback Pin.
Reference voltage is 0.235V, connect cathode of lowest LED
and resistor here.
Chip Enable Pin.
Connect to 1.2V or higher to enable device, 0.4V or less to
disable device.
Over Voltage Protection Pin.
Input Voltage Pin.
Elite Semiconductor Memory Technology Inc. /Elite MicroPower Inc.
Publication Date: Oct. 2009
Revision: 1.0
2/12





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