TELEFUNKEN Semiconductors

U209B3/ U209B3–FP

Preliminary Information

Rev. A1: 01.09.1995

1 (15)

Phase Control Circuit – Tacho Applications

Description:

The integrated circuit U209B3, is designed as a phase

control circuit in bipolar technology. It has also protection

circuit for the supply. Due to integration of many

functions, it leads to significant cost and space saving as

well as increased reliability. At the same time, it gives the

designer free hand to select varieties of regulators to

choose from and switching characteristics according to its

choice.

Features

D Internal frequency to voltage converter

D Externally controlled integrated amplifier

D Automatic soft start with minimised ”dead time”

D Voltage and current synchronisation

D Retriggering

D Triggering pulse typ. 155 mA

D Internal supply voltage monitoring

D Temperature compensated reference source

D Current requirement ≤ 3 mA

Package: DIP14, SO16

Control

amplifier

Voltage

monitoring

Supply

voltage

limitation

Reference

voltage

Output

pulse

Frequency

to voltage

converter

ö

Phase

control unit

Soft start

10(10)

11(11)

12(12)

8(8)

7(7)

Voltage / Current

detector

Automatic

retriggering

14(16)

1(1)

4(4)

95 10691

GND

+

–

s

5(5)

6(6)

3(3)

2(2)

13(15)

9(9)

Figure 1. Block diagram – SO 16 in bracket