CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER
FOR ADATPTORS AND BATTERY CHARGERS
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
TJ1051
SOT-23-6LD
SOP-8
ORDERING INFORMATION
Device
Marking
1051
TJ1051
Package
SOT-23-6LD
SOP-8
TJ1051CL
TJ1051CD
DESCRIPTION
TJ1051 is a highly integrated solution for SMPS
applications requiring constant voltage and constant
current mode.
TJ1051 integrates one voltage reference, two operational
amplifiers (with ORed ouputs - common collectors), and
a current sensing circuit.
The voltage reference combined with one operational
amplifiers makes it an ideal voltage controller, and the
PIN CONNECTIONS (TOP VIEW)
SOT-23-6
1
Vctrl
Vcc
SOP-8
6
5
4
1
2
3
Vctrl
Vcc
Vsense
Gnd
8
Out
7
Ictrl
6
Nc
5
2
Gnd Vsense
other low voltage reference combined with the other
Ictrl
3
Out
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 brideg to be connected to the output
Block Diagram
of the power supply (adaptor, battery charger)
to set the voltage regulation by dividing the
1.210V
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 vlotage threshold.
●
Optional compensation components (R and C).
200mV
4
Nc
Vcc
Out
Vctrl
APPLICATIONS
● BATTERY CHARGERS
● ADAPTERS
Gnd
Ictrl
Vsense
TJ1051, is ideal for smallest package available, is ideal for space shrinked applications such as
battery chargers and adaptors.
Jan. 2007-Rev 1.0
HTC
1
HTC [ HTC KOREA TAEJIN TECHNOLOGY CO. ]
