SN71052 데이터 시트보기 (PDF) - Kodenshi Auk Co., LTD

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SN71052

Constant voltage and constant current controller for battery chargers and adapters

Kodenshi Auk Co., LTD 

◈ Pin connection

6

5

4

1

2

3

SN71052

1 : Vctrl

2 : GND

3 : OUT

4 : Ictrl

5 : Vsense

6: Vcc

◈ Product Line-up

No.

Name

Function

1

Vctrl

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

2

GND

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.

Common open-drain output of the two internal Op-Amps. The pin, able to

3

OUT

sink current only, will be connected to the branch of the optocoupler’s

photodiode to transmit the error signal to the primary side.

4

Ictrl

Non-inverting input of the current loop Op-Amp. It will be tied directly to the

hot (negative) end of the current sense resistor

5

Vsense

Inverting input of the current loop Op-Amp. The pin will be tied to the cold end

of the current sense resistor through a decoupling resistor.

Supply Voltage of the device. A small bypass capacitor (0.1 μF typ.) to GND,

6

Vcc

located as close to IC’s pins as possible, might be useful to get a clean

supply voltage.

KSD-I5P012-000

2

Dec, 2011 REV. 00

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