Rainbow-electronics DS1094L Manual de usuario descargar pdf

General Description

The DS1094L is a silicon oscillator that generates four

multiphase, spread-spectrum, square-wave outputs.

Frequencies between 2MHz and 31.25kHz can be out-

put in either two, three, or four-phase mode. The inter-

nal master oscillator can be dithered by either 0, 2, 4,

or 8% to reduce the amount of peak spectral energy at

the fundamental and harmonic clock frequencies. This

significantly reduces the amount of electromagnetic

interference (EMI) radiation that is generated at the sys-

tem level. The DS1094L is ideally suited as a clock gen-

erator for switched-mode power supplies. The outputs

generated by the DS1094L are used by DC-DC circuit-

ry to efficiently shift voltages either up or down. The

DS1094L can be programmed using the I

C™-compati-

ble, 2-wire serial interface to select the output frequen-

cy, number of clock phases, and dither rate, or

optionally it can be shipped from the factory custom

programmed.

Applications

Switch-Mode Power Supplies

Servers

Printers

Automotive Telematics and Infotainment

Features

♦ EconOscillator™ with Two, Three, or Four Phase

Outputs

♦ Ideally Suited as the Clock Generator for Switch-

Mode Power Supplies

♦ Output Frequencies Programmable from 2MHz to

31.25kHz

♦ Dithered Output Significantly Reduces EMI

Emissions

♦ No External Timing Components Required

♦ Nonvolatile (NV) Configuration Settings

♦ User-Programmable—Factory Programmed

Options Available

♦ Operating Temperature Range: -40°C to +85°C

DS1094L

Multiphase Spread-Spectrum EconOscillator

______________________________________________ Maxim Integrated Products 1

OUT4

OUT3GND

SCL

SDAOUT2

OUT1

µSOP

TOP VIEW

DS1094L

Pin Configuration

Ordering Information

OUT

PHASE 1

PHASE 2

PHASE 3

DC-DC

STEP-DOWN

CONVERTER

OUT1

OUT2

OUT3

OUT4

GND

SCL

SDA

DS1094L

PULLUP

THREE-PHASE

EXAMPLE WITH

DITHERED CLOCKS TO

REDUCE EMI

DC-DC

STEP-DOWN

CONVERTER

DC-DC

STEP-DOWN

CONVERTER

Typical Operating Circuit

Rev 1; 5/04

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART TEMP RANGE

PIN-PACKAGE

DS1094LU -40°C to +85°C 8 µSOP

EconOscillator is a trademark of Dallas Semiconductor.

C is a trademark of Philips Corp. Purchase of I

C compo-

nents of Maxim Integrated Products, Inc., or one of its subli-

censed Associated Companies, conveys a license under the

Philips I

C Patent Rights to use these components in an I

system, provided that the system conforms to the I

C Standard

Specification as defined by Philips.

1 2 3 4 5 6 ... 10 11

Indice de contenidos

Pagina 1 - PIN-PACKAGE

General DescriptionThe DS1094L is a silicon oscillator that generates fourmultiphase, spread-spectrum, square-wave outputs.Frequencies between 2MHz an

Pagina 2 - DC ELECTRICAL CHARACTERISTICS

DS1094Lthat are transferred (most significant bit first) from theslave to the master are read by the master using the bitread definition above, and th

Pagina 3 - AC ELECTRICAL CHARACTERISTICS

DS1094LMultiphase Spread-Spectrum EconOscillatorMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in

Pagina 4 - DS1094L toc01

DS1094LMultiphase Spread-Spectrum EconOscillator2 _____________________________________________________________________ABSOLUTE MAXIMUM RATINGSRECOMME

Pagina 5

DS1094LMultiphase Spread-Spectrum EconOscillator_____________________________________________________________________ 3AC ELECTRICAL CHARACTERISTICS(V

Pagina 6 - Functional Diagram

SUPPLY CURRENT vs. SUPPLY VOLTAGEfOUT = 1MHz, 2φ MODEDS1094L toc01SUPPLY VOLTAGE (V)SUPPLY CURRENT (mA)3.453.303.150.751.001.251.500.503.00 3.60TA = +

Pagina 7 - Triangle Wave Generator

DS1094LMultiphase Spread-Spectrum EconOscillator_____________________________________________________________________ 5Typical Operating Characteristi

Pagina 8 - Table 6. Control Registers

DS1094LDetailed DescriptionThe DS1094L consists of a master oscillator, prescaler,phase generator, and triangle-wave generator (used todither the mast

Pagina 9 - Description

PrescalerThe prescaler divides the master oscillator frequency,fMOSC, by 1, 2, 4, or 8. The resultant frequency, fOSC, iscalculated using the followin

Pagina 10 - Application Information

DS1094Lwill dither between 2MHz and 1.96MHz at a modulationfrequency determined by the selected dither frequen-cy. Continuing with the same example, i

Pagina 11 - Package Information

2-Wire Serial Interface DescriptionDefinitionsThe following terminology is commonly used todescribe 2-wire data transfers.Master Device: The master de

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Rainbow-electronics DS1094L Manual de usuario

Busca en linea o descarga Manual de usuario para Hardware De La Computadora Rainbow-electronics DS1094L. Rainbow Electronics DS1094L User Manual Manual de usuario

Indice de contenidos

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