STEVAL-ISA113V1

Adapter features

Doc ID 024140 Rev 1

3/11

The transformer core is a standard E13. The output voltage value is set in a simple way

through the RfbH-RfbL voltage divider between the output terminal and the FB pin,

according to the following formula:

Equation 1

In the schematic, RfbH has been split into RfbH1 and RfbH2; and RfbL into RfbL1 and

RfbL2 in order to allow a better tuning of the output voltage value.

If the jumper J1 is not selected, the IC is biased through the internal HV-startup current

generator (“self-biasing”).

If low standby consumption and good efficiency performance are required, the HV-startup

current generator must be excluded. This can be done selecting the jumper J1, which

through the output is referred to as “external biasing”.

IC1

VIPer06HS

Offline high-voltage PWM controller

SSO-10

ST

T1

1921.0040

Transformer

Magnetica

Lin

B82144A2105J 1 mH inductor LBC series

Epcos

Table 2.

Bill of material (continued)

Ref.

Part

Description

Package

Manufacturer

⎟⎟⎠

⎞

⎜⎜⎝

⎛

+

⋅

=

RfbL

RfbH

V

1

3

.

3