EC4503 Datasheet, PDF (1/13 Pages) E-CMOS Corporation – White LED Set-up Converter

White LED Set-up Converter
EC4503
General Description
Features
The EC4503 is a current-mode and fixed frequency
Boost converter with an integrated N-FET to drive
white LEDs.
The series connection allows the LED current to be
identical for uniform brightness. Its low on-resistance
of NFET and low feedback voltage reduce power loss
and achieve high efficiency. Fast switching frequency
(1.5MHz typical) allows using small size inductor and
both of input and output capacitors. An over voltage
protection function, which monitors the output voltage
via OVP pin,stops switching of the IC if the OVP voltage
exceeds the over voltage threshold. An internal soft-start
circuit eliminates the inrush current during start-up.
The EC4503 also integrates under-voltage lockout,
Overtemperature protection, and current limit circuits to
Protect the IC in abnormal conditions.
The EC4503 is available in a SOT-23-6 packages.
●Wide Input Voltage from 2.7V to 6V
●0.2V Reference Voltage
●Fixed 1.5MHz Switching Frequency
●PWM Brightness Control with Wide Frequency
Range of 100Hz to 100kHz
●Build‐In Power MOSFET : 0.2Ω
●Open‐LED Protection
●Under‐Voltage Lockout Protection
●Over‐Temperature Protection
●<1mA Quiescent Current during Shutdown
●SOT‐ 23‐ 6 Packages
● Lead Free and Green Devices Available
●(RoHS Compliant)
Applications
●White LED Display Backlighting
●Cell Phone and Smart Phone
●PDA, PMP, MP3
●Digital Camera
E-CMOS Corp. (www.ecmos.com.tw)
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3H29N-Rev.F001