Pin description

SEA05

2/10

Doc ID 17014 Rev 1

1

Pin description

Figure 2.

Pin configuration

Note:

The adjacent pins have the same AMR to increase the robustness of the IC against

accidental short circuit among pins.

 

Vcc

Out

Ictrl

Isense

Vctrl

GND

1

2

3

6

5

4

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

1

Isense

Inverting input of the current loop op-amp. The pin is tied to the cold end of the

current sense resistor through a decoupling resistor.

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 setpoint.

3Vctrl

Inverting input of the voltage loop op-amp. The pin is tied to the mid-point of a

resistor divider that senses the output voltage.

4Ictrl

Non-inverting input of the current loop op-amp. It is tied directly to the hot

(negative) end of the current sense resistor

5OUT

Common open-drain output of the two internal op-amps. The pin, able to sink

current only, is connected to the branch of the optocoupler’s photodiode to

transmit the error signal to the primary side.

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.