SE1052_0907 Datasheet, PDF (1/8 Pages) Seaward Electronics Inc. – Constant Voltage and Constant Current Controller

Description
SE1052 is a highly integrated solution for SMPS
applications requiring CV (constant voltage) and CC
(constant current) modes. It also has built-in LED
drivers specifically designed for stand-alone Battery
Charging applications. SE1052 integrates three
voltage references, three operational amplifiers, and
two current sensing circuits together in the same IC.
The 1^st voltage reference, together with one
operational amplifier, controls the output voltage.
The 2^nd voltage reference, together with another
operational amplifier, senses and limits the amount of
Features
¾ Constant Voltage and Constant Current Control
¾ Low Voltage Operation
¾ Precision Internal Voltage References
¾ Low External Component Count
¾ Current Sink Output Stage
¾ Easy Compensation
¾ Low AC Mains Voltage Rejection
¾ Rugged 1.5KV ESD withstand capability.
¾ Internal 2 LED drivers
¾ Available in SOP8 and DIP-8 Package.
¾ RoHS Compliant and 100% Lead (Pb)-Free
the current on the low side, hence the overall current
at the output. The 3^rd voltage reference and
operational amplifier senses when the charging
current drops to 10% of the programmed value.
During charging, SE1052 will turn on Red LED. When
the charging is completed, SE1052 will turn on Green
Application
¾ Adapters
¾ Digital Camera Chargers.
¾ Cellphone Chargers.
¾ Other Battery Chargers
LED. The SE1052 is available in SOP8 and DIP8
package.
Pin Configuration
SOP8 Top View
DIP8 Top View
Green 1
8 Red _Green
1
8
Output 2
7 Ictrl
GND 3
6 Vsense Output
2
7
Vctrl 4
5 Vcc
GND
3
6
Red
Ictrl
Vsense
Ordering Information
Device
Package
SOP8 and
SE1052
DIP8
(Lead-free)
V_OUT
Fixed output voltages
1.21V
Vctrl
4
5
Vcc
Pin Description
Name Pin# Type
Green 1
Driver
Function
Turning on Green LED when the charging is completed.
V_OUT
2
GND
3
V_CTRL
4
V_CC
5
V_SENSE
6
I_CTRL
7
Red
8
Current Sink Output Output Pin. Sinking Current Only
Power Supply
Ground Line. 0V Reference For All Voltages
Analog Input
Input Pin of the Voltage Control Loop
Power Supply
Positive Power Supply Line
Analog Input
Input Pin of the Current Control Loop
Analog Input
Input Pin of the Current Control Loop
Driver
Turning on Red LED when the charging is in progress.
Revision 7/23/2009
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., 2006. • www.seawardinc.com.cn • Page 1