CP2123 (CHIP)
Step-Up White-LED Driver Brief

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Product Brief
CP2123
V1.0
DC/DC Series
Step-Up White-LED Driver for Mid-size or Large Size Panel
General Description
The CP2123 is a step-up DC/DC converter specifically designed for driving white LEDs with a
constant current. The device can drive up to 33 white LEDs from a 3.5V power supply or 60 white
LEDs from a 10-24V power supply. PWM dimming control is supported to adjust the brightness
of white LEDs. The CP2123 switch at 1.4 MHz, allowing the use of tiny components. 300mV
feedback voltage minimizes the power loss in the current setting resistor for better efficiency. The
CP2123 is equipped with over-voltage protection function, the OVP 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 CP2123 is available in SOT23-6L and DFN-8L package.
Features
Inherently matched LED current
High efficiency: Up to 90%
Over-voltage protection with linear OVP voltage setting
Fast 1.4 MHz switching frequency
Shutdown current: <1μA
SOT23-6L and DFN-8L package
Up to 1MHz PWM Dimming
Drives up to 12 series connected LEDs from a 3.5V power supply
Drives up to 33(11×3) LEDs from a 3.5V power supply
Drives up to 60 LEDs from a 10V power supply
Applications
Huge screen size mobile phones
Digital still cameras
PDAs, PNDs, MP4 players
Flash or Torch
Pin Configurations
SOT23-6L
-40℃~85
DFN-8L
-40℃~85
PGND 1
V IN 2
OVP 3
SHDN 4
C P 2123
DFN8
8 SW
7 NC
6 FB
5 GND
SW 1
GND 2
FB 3
C P 2123
S O T 2 3 -6L
6 V IN
5 OVP
4 SHDN
CP2123 Top View
Copyright ©2012 Chiphomer Technology Limited
1


CP2123 (CHIP)
Step-Up White-LED Driver Brief

No Preview Available !

Click to Download PDF File for PC

Product Brief
CP2123
V1.0
DC/DC Series
Step-Up White-LED Driver for Mid-size or Large Size Panel
Typical Application Circuit(s)
V IN
3.5~5.5 V
C IN
1µF
L1
1 0 µH
V IN S W
OVP
C P 2123
D1 V O U T
2 0 0 kΩ
COUT
1 µF
OFF O N
SHDN GN D
FB
R1
C P 2123 Driving 8 L E D s
Contact with Chiphomer
4F, Building D, 1618 Yishan Road Shanghai, 201103, P.R.C.
Tel: (86)21-64014543 64058488
Fax: (86)21-64050030
Email: sales@chiphomer.com
Web site: www.chiphomer.com
Shenzhen Office:
19B, Building 1, Dushi Yangguang Garden CheGongMiao, Futian District, Shenzhen, 518048,
P.R.C.
Tel: (86)755-82046706 82047789
Fax: (86)755-82046709
Copyright ©2012 Chiphomer Technology Limited
2




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