SN71052 Datasheet | Kodenshi AUK Group

Description The SN71052 is a highly integrated solution for SMPS applications requiring a dual control loop to perform CV (constant voltage) and CC (constant current) regulation. The SN71052 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 ponents needed to plete the two control loops are: - A resistor divider that senses the output of the power supply SOT-26 (adapter, battery charger) and fixes the voltage regulation set point at the specified value; - 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 pensation ponents (R-C networks) for both loops. ORDERING INFORMATION Product SN71052 Marking 702 Package SOT-26 Application ◈ Battery chargers ◈ AC to DC adapters Block Diagram ▲ Marking Detail Information 702(①)- (②) ① Device Code ② Week Code KSD-I5P012-000 Dec, 2011 REV. 00 Free Datasheet http://../ ◈ Pin connection 1 : Vctrl 2 : GND 3 : OUT 4 : Ictrl 5 : Vsense 6: Vcc 6 5 4 1 2 3 ◈ Product Line-up No. Name Function Inverting input of the voltage loop Op-Amp. The pin will be tied to the mid-point of a resistor divider that senses the output voltage. Ground. Return of the bias current of the device. 0 V reference for all voltages. The pin should be tied as close to the ground output terminal of the converter as possible to minimize load current effect on the voltage regulation set point. mon open-drain output of the two internal Op-Amps. The pin, able to sink current only, will be connected to the branch of the optocoupler’s photodiode to transmit the error signal to the primary...