CX2905 Controller Datasheet

CX2905 Datasheet, PDF, Equivalent


Part Number

CX2905

Description

Constant Voltage and Constant Current Controller

Manufacture

CHENGXINWEI

Total Page 7 Pages
Datasheet
Download CX2905 Datasheet


CX2905
深圳市诚芯微科技有限公司
SHENZHEN CHENGXINWEI TECHNOLOGY CO., LTD.
CX2905
Constant Voltage and Constant Current Controller(Preliminary)
www.cxwic.com
1 页共 7

CX2905
深圳市诚芯微科技有限公司
SHENZHEN CHENGXINWEI TECHNOLOGY CO. LTD.
CX2905
Description
CX2905 is a highly integrated solution for SMPS
applications requiring CV (constant voltage) and CC
(constant current) modes.
CX2905 integrates one voltage reference, two
operational amplifiers (the outputs are OR’ed
together, common collectors), and a current
sensing circuit.
The voltage reference, together with one
operational amplifier, makes it an ideal voltage
controller. The other low voltage reference,
together with another operational amplifier, makes it
an ideal current limiter for low side output current
sensing. The current threshold is fixed, and precise.
The CX2905, housed in space-saving SOT23-6L
package, is ideal for space sensitive applications
such as adapters, cellphone chargers, Digital
Camera chargers, and other battery chargers.
Features
Constant Voltage and Constant Current Control
Low Voltage Operation at 3V
Precision Internal Voltage Reference
Low External Component Count
Current Sink Output Stage
Easy Compensation
Low AC Mains Voltage Rejection
Rugged 2KV ESD withstand capability.
Available in SOT-23-6LPackage.
RoHS Compliant and 100% Lead (Pb)-Free
Application
Adapters
Digital Camera Chargers.
Cellphone Chargers.
Other Battery Chargers
Ordering Information/Making Information
Device
Package
VOUT
Pin Configuration
CX2905
SOT-23-6L
(Lead-free)
Fixed output voltages
1.21V
Package
Making Information
PIN1 is down in the left-hand
corner. The last character is the
batch number.A dot on top right
corner is for lead-free process.
Pin Description
Name Pin#
Type
Function
VCTRL
1
Analog Input
Input Pin of the Voltage Control Loop
GND
2
Power Supply Ground Line. 0V Reference For All Voltages
VOUT
3 Current Sink Output Output Pin. Sinking Current Only
ICTRL
4
Analog Input
Input Pin of the Current Control Loop
VSENSE
5
Analog Input
Input Pin of the Current Control Loop
VCC 6 Power Supply Positive Power Supply Line
www.cxwic.com
2 页 共 7


Features .
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