IK3052A Datasheet, PDF (1/4 Pages) IK Semicon Co., Ltd – Constant Voltage and Constant Current Controller for Adaptors and Battery Chargers

TECHNICAL DATA
Constant Voltage and Constant Current Controller
for Adaptors and Battery Chargers
IK3052A
Description
IK3052A is a highly integrated solution for SMPS applications
requiring constant voltage and constant current mode.
IK3052A integrates one voltage reference, two operational
amplifiers (with ORed outputs – common collectors), and a current
sensing circuit.
The voltage reference combined with one operational amplifier
makes it an ideal voltage controller, and the other low voltage reference
combined with the other operational amplifier makes it an ideal current
limiter for output low side current sensing.
The current threshold is fixed and precise.
The only external components are:
• A resistor bridge to be connected to the output of the power supply
(adapter, battery charger) to set the voltage regulation by dividing
the desired output voltage to match the internal voltage reference
value.
• A sense resistor having a value and allowable dissipation power
which need to be chosen according to the internal voltage threshold.
• Optional compensation components (R and C).
IK3052A, is ideal for smallest package available, is ideal for space
shrinked applications such as adapters and battery chargers.
PIN CONNECTION (top view)
Features
• CONSTANT VOLTAGE AND CONSTANT CURRENT
CONTROL
• LOW VOLTAGE OPERATION
• PRECISION INTERNAL COMPONENT COUNT
• CURRENT SINK OUTPUT STAGE
• EASY COMPENSATION
• LOW AC MAINS VOLTAGE REJECTION
Device
IK3052AS2T
ORDERI NG I NFORM ATI ON
Operating
Temperature Range
TA = 0° to 85° C
for all packages
Package
Plastic
SOT23-6
Shipping
Tape& Reel
Pin Definitions and Functions
SOT23-6 Pin out
Name
Vcc
GND
Vctrl
Ictrl
Out
Vsense
Pin#
6
2
1
4
3
5
Type
Power Supply
Power Supply
Analog Input
Analog Input
Current Sink Output
Analog Input
Function
Positive Power Supply Line
Ground Line. 0V Reference For All Voltages
Input Pin of the Voltage Control Loop
Input Pin of the Current Control Loop
Output Pin. Sinking Current Only
Input Pin of the Current Control Loop
2011, February, Rev. 01