TSM1052

Description

3/15

1

Description

1.1

Pin connection

Figure 1.

Pin Connection (top view)

1.2

Pin description

Vcc

Vsense

Ictrl

Vctrl

OUT

GND

1

2

3

6

5

4

Vcc

Vsense

Ictrl

Vcc

Vsense

Ictrl

Vctrl

OUT

GND

Vctrl

OUT

GND

1

2

3

6

5

4

1

2

3

6

5

4

1

2

3

6

5

4

Vcc

Vsense

Ictrl

Vctrl

OUT

GND

1

2

3

6

5

4

Vcc

Vsense

Ictrl

Vcc

Vsense

Ictrl

Vctrl

OUT

GND

Vctrl

OUT

GND

1

2

3

6

5

4

1

2

3

6

5

4

1

2

3

6

5

4

Table 2.

Pin description

N.

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.

2GND

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.

3OUT

Common 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 side.

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

hot (negative) end of the current sense resistor

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.

6Vcc

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

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

supply voltage.