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PD5036

TELEPHONE RING GENERATOR CONTROLLER

Unspecified 

PD5036

TELEPHONE RING GENERATOR CONTROLLER

FEATURES

♦ Integrated Overload and Short Circuit Protection

♦ Programmable Large Swing Output Amplitude

♦ Digitally Selectable Ringing Frequencies; 16.7/20/25 or 50Hz

♦ Line Regulated Output Amplitude, 45-93Vrms

♦ Overload Protection with Adaptive Output Amplitude

♦ Off-Hook / Overload Detection

♦ Zero Crossing Synchronization Output

♦ Operates from a Single 5V Supply

♦ Open Loop Flyback Topology Reduces Component Count

♦ Total Bill of Material Cost as Low as $5 Including the PD5036

for 2W Ring Generator Applications

INHIBIT

1

FS

2

F1

3

F0

4

OHD

5

XTAL1

6

16

Vcc

15

PWM_Out

14

I.C.

13

CL

12

CAD_In

11

PAD_Out

APPLICATIONS

♦ 1 to 3 Watt Low Cost Sine Wave Ring Generators

♦ 3 to 6 Watt advanced Sine Wave Ring Generators

♦ Large Variety of Customized Sine Wave Ring Generators

♦ Ring Generator for PBX, PABX, DCL, CTI and Key Systems

♦ Ring Generator for Rural Telephony and Wireless Local Loop Systems

♦ Ring Generator for Short/Long Loop Applications

♦ Ring Generator for Telecom Test Equipment

XTAL2

7

10

GND

8

9

SOW-16 Package

BRC

SYNC

GENERAL DESCRIPTION

The PD5036 is a unique pul se w idth m odulator c ontroller, des igned pri marily f or a vari ety of hi gh vol tage s inusoidal t elephone ring generat or

applications. The PD5036 is suitable for applications requiring up to 6 Watt and provides all necessary controls for implementing advanced overload

protection, zero crossing relay switching synchronization, Off-Hook detection, multiple ringing frequency selection and output amplitude adjustment.

The power train, designed to be used with the PD5036, is an i solated, open l oop flyback t opology. The P D5036 generates a P WM s ignal, which

drives a FE T t ransistor t hat s witches t he primary of a f lyback t ransformer. Thi s produces a rec tified half s ine wave on the secondary side of t he

transformer. An additional control signal synchronizes a 4-out put transistor bridge, which converts the rectified half sine wave to full sine wave. In

order to maintain the ring generator’s input to output isolation, the synchronization signals control the bridge via an opto coupler pair. The controller

also includes overload protection, A/D function for measuring the input voltage, and a report signal for indicating over current.

The PD5036 is a c ost-effective solution for applications using more than 10,000 units. For quant ities less than 10,000 units, the most economical

solution is a modular sine wave ring generator (PCR-SIN01A Series, PCR-SIN03B Series, or the PCR-SIN06 Series).

INTERNAL BLOCK DIAGRAM

PD5036

CL

OHD

Vcc

Over-Current

Sensing

Mechanism

Overload

Protection

GND

CAD_In

PAD_Out

Vin

Sense

A/D

Transfer Function

PWM

Unit

PWM_Out

PWM_Out

XTAL1

XTAL2

FS

INHIBIT

F0

F1

BRC

SYNC

Clock

Circuitry

Reset

Clock

Sine

Generator

PowerDsine Ltd. Tel: +972-3-934-7663 • Fax: +972-3-934-7669 • Email: sales@powerdsine.com

PowerDsine Inc. Tel: +516-756-4680 • Fax: +516-756-4691• Email: pwrdsine@erols.com

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