Product Brief
CP2125E V0.9
DC/DC Series
Step-Up White-LED Driver with Built-in Over-voltage Protection
General Description
The CP2125E is a step-up DC/DC converter specifically designed for
driving white LEDs with a constant current. The device can drive up to 5
white LEDs from a 3.0V power supply. PWM dimming control is
supported to adjust the brightness of white LEDs. The CP2125E switch
at 1.1 MHz, allowing the use of tiny components. 105mV/200mV
feedback voltage minimizes the power loss in the current setting
resistor for better efficiency. The CP2125E is equipped with built-in
over-voltage protection function, the SW pin monitors the output voltage
and will turn off the device if an over-voltage condition is present to
prevent damage from an open circuit condition. The CP2125E is
available in SOT23-5L package.
SOT23-5L
-40℃~85℃
Features
Inherently matched LED current
High efficiency: 84%(typical)
Drives up to 5 LEDs from a 3.0V power supply
Built-in over-voltage protection
Fast 1.1 MHz switching frequency
Shutdown current: <1μA
Low profile SOT23-5L package
Applications
Mobile phones
Digital still cameras
MP3 players
PDAs
GPS receivers
Pin Configurations
CP2125E Top View
SOT23-5L
Copyright ©2008 Chiphomer Technology Limited
1
Product Brief
CP2125E V0.9
DC/DC Series
Step-Up White-LED Driver with Built-in Over-voltage Protection
Typical Application Circuit(s)
Contact with Chiphomer
4F, Building D, 1618 Yishan Road Shanghai, 201103, P.R.C.
Tel: (86)21-64014543 64058488
Fax: (86)21-64050030
Sale: sales@chiphomer.com
Technical support: support@chiphomer.com
Web site: www.chiphomer.com
Shenzhen Office:
10D, Building 2, Dushi Yangguang Garden CheGongMiao, Futian District, Shenzhen, 518048,
P.R.C.
Tel: (86)755-82046706 82047789
Fax: (86)755-8204670
Copyright ©2008 Chiphomer Technology Limited
2