AN2950 datasheet(9/37 Pages) STMICROELECTRONICS

9 / 37 page

AN2950

Adapter features

Doc ID 15494 Rev 1

9/37

1.2

Transformer

Table 3 lists the electrical characteristics of the transformer.

The size, pinout and mechanical characteristics are given in the following figures.

BU16-4530R5BL

Common mode choke

COILCRAFT

VR1

TS431

Voltage reference

STMicroelectronics

VIPER28LN

Offline high voltage controller

STMicroelectronics

1338.0019

Switch mode power transformer

MAGNETICA

Table 2.

Bill of materials (continued)

Reference

Part

Description

Manufacturer

Table 3.

1338.0019 transformer characteristics

Properties

Value

Test Condition

Primary inductance

1.5 mH ±15%

Measured at 1 kHz

Leakage inductance

0.8% nom.

Measured at 10 kHz

Primary to secondary turn ratio

(4 - 5)/(6,7 – 10,9)

12.85 ±5%

Measured at 10 kHz

Primary to auxiliary turn ratio

(4 - 5)/(1 - 2)

5.29 ±5%

Measured at 10 kHz

Nominal operating frequency

60 kHz

Nominal/peak power

10 W/15 W

Saturation current

1 A

BSAT = 0.32T

Insulation

4 kV

Primary to secondary

Figure 3.

Transformer size and pin diagram -

bottom view (pin side)

Figure 4.

Transformer size and pin diagram -

electrical diagram

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