STMicroelectronics L6562A Evaluation Board STEVAL-ILL016V2 STEVAL-ILL016V2 STEVAL-ILL016V2 Data Sheet

February 2008

  Rev 2

1/15

15

Constant voltage and constant current controller

for battery chargers and adapters

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Secondary-side constant voltage and constant 
current control

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Very low voltage operation

■

Very low quiescent consumption

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High-accuracy internal reference

■

Low external component count

■

Wired-or open-drain output stage

■

Easy frequency compensation

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SOT23-6 micro package

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Battery chargers

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AC DC adapters 

The TSM1052 is a highly integrated solution for 
SMPS applications requiring a dual control loop to 
perform CV (constant voltage) and CC (constant 
current) regulation.

The TSM1052 integrates a voltage reference, two 
op amps (with OR-ed open-drain outputs), and a 
low-side current sensing circuit.

The voltage reference, along with one op amp, is 
the core of the voltage control loop; the current 
sensing circuit and the other op amp make up the 
current control loop. 

The external components needed to complete the 
two control loops are:

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A resistor divider that senses the output of the 
power supply (adapter, battery charger) and 
fixes the voltage regulation set point at the 
specified value;

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A sense resistor that feeds the current sensing 
circuit with a voltage proportional to the dc 
output current; this resistor determines the 
current regulation set point and must be 
adequately rated in terms of power dissipation;

■

Frequency compensation components
(RC  networks) for both loops.

The TSM1052, housed in one of the smallest 
package available, is ideal for space-shrunk 
applications such as adapters and chargers.

TSM1052

SOT23-6

Tape and reel