AN1246

General circuit description

5/8

Figure 3.

Cross section of the transformer

1

DS2

100 V 1 A Schottky

1

DS3

LL4148

1

F1

fuse

0.5 A pico

1

IC1

1

IC2

1

IC3

H11A817A (optocoupler)

1

J1

Connector terminal

1

J2

Connector terminal

1

L2

Coilcraft PCH-27-103

10 µH

1

RS2

4.99 K

Ω 1% 1/8 W

1

RS3

5.1 K

Ω 1/8 W

1

RS4

1.6

Ω 1/8 W

1

RS5

1.37

Ω 1% 1/8 W

1

R6

150

Ω 1/4 W

1

R7

5.23 K

Ω 1% 1/4 W

1

R8

1.2 K

Ω 1/4 W

1

R9

3.9

Ω 1/4 W

1

R11

2.7 K

Ω 1/4 W

1

RS14

82 K

Ω 1/4 W

1

T1

Cramer Coil CSM 1608-027

1.

Parts available from STMicroelectronics. “S” in legend denotes a surface mount part.

Table 3.

Transformer specification

Parameter

Value

Primary inductance

1.65 mH

Core

C40 EE16

Table 2.

Component list (continued)

Quantity

Reference

Description

Value