Rainbow-electronics MAX1567 Manual do Utilizador descarregar pdf (Página 1)

General Description

The MAX1566/MAX1567 provide a complete power-

supply solution for digital cameras. They improve perfor-

mance, component count, and size compared to con-

ventional multichannel controllers in 2-cell AA,

1-cell lithium-ion (Li+), and dual-battery designs. On-chip

MOSFETs provide up to 95% efficiency for critical power

supplies, while additional channels operate with external

FETs for optimum design flexibility. This optimizes overall

efficiency and cost, while also reducing board space.

The MAX1566/MAX1567 include six high-efficiency DC-

to-DC conversion channels:

• Step-up DC-to-DC converter with on-chip power FETs

• Main DC-to-DC converter with on-chip FETs, config-

urable to step either up or down

• Step-down core DC-to-DC converter with on-chip

FETs

• DC-to-DC controller for white LEDs or other output

• Extra DC-to-DC controller (typically for LCD); two

extra controllers on the MAX1566

• Transformerless inverting DC-to-DC controller (typi-

cally for negative CCD bias) on the MAX1567

All DC-to-DC channels operate at one fixed frequency

settable from 100kHz to 1MHz to optimize size, cost, and

efficiency. Other features include soft-start, power-OK

outputs, and overload protection. The MAX1566/

MAX1567 are available in space-saving 40-pin thin QFN

packages. An evaluation kit is available to expedite

designs.

Applications

Digital Cameras

PDAs

Features

♦ 95% Efficient Step-Up DC-to-DC Converter

♦ 0.7V Minimum Input Voltage

♦ Main DC-to-DC Configurable as Either Step-Up or

Step-Down

♦ Combine Step-Up and Step-Down for 90%

Efficient Boost-Buck

♦ 95% Efficient Step-Down for DSP Core

♦ Regulate LED Current for Four, Six, or More LEDs

♦ Open LED Overvoltage Protection

♦ Transformerless Inverting Controller (MAX1567)

♦ Three Extra PWM Controllers (Two on the

MAX1567)

♦ Up to 1MHz Operating Frequency

♦ 1µA Shutdown Mode

♦ Soft-Start and Overload Protection

♦ Compact 40-Pin 6mm x 6mm Thin QFN Package

MAX1566/MAX1567

Six-Channel, High-Efficiency, Digital

Camera Power Supplies

________________________________________________________________ Maxim Integrated Products 1

40 36373839

19 2016 17

3132

3435

CCSD

CCM

ON3

MAX1566/MAX1567

TOP VIEW

FB3L

CC3

DL1

DL3

DL2

GND

INDL2

FB2

SUSD

ONM

FBM

CCSU

REF

ONSU

FBSU

SCF

CC2

ON2

PVM

LXM

PGM

PVSU

LXSU

PGSU

OSC

FBSD

ONSD

PVSD

LXSD

PGSD

ON1

FB1

CC1

FB3H

AUX1OK

SDOK

6mm x 6mm

THIN QFN

Pin Configuration

Ordering Information

19-2882; Rev 0; 5/03

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.

EVALUATION KIT

AVAILABLE

PART TEMP RANGE PIN-PACKAGE

AUX2

FUNCTION

MAX1566ETL -40°C to +85°C

40 Thin QFN

6mm x 6mm

Step-up

controller

MAX1567ETL -40°C to +85°C

40 Thin QFN

6mm x 6mm

Inverting

controller

Li+ OR 2AA

BATTERY INPUT

SYSTEM 5V

3.3V LOGIC

1.8V CORE

LEDS

CCD/LCD + 15V

CCD - 7.5V

STEP-UP

MAIN DC-TO-DC

STEP-DN

AUX3

AUX1

AUX2

ONSU

ONM

ONSD

ON3(LED)

ON1

ON2

MAX1567

Typical Operating Circuit

1 2 3 4 5 6 ... 34 35

Resumo do Conteúdo

Página 1 - Camera Power Supplies

General DescriptionThe MAX1566/MAX1567 provide a complete power-supply solution for digital cameras. They improve perfor-mance, component count, and s

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Página 26 - Oscillator

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MAX1566/MAX1567Six-Channel, High-Efficiency, DigitalCamera Power Supplies_____________________________________________________________________________

Página 28

MAX1566/MAX1567Six-Channel, High-Efficiency, DigitalCamera Power SuppliesDesigning a PC BoardGood PC board layout is important to achieve optimalperfo

Página 29

MAX1566/MAX1567Six-Channel, High-Efficiency, DigitalCamera Power SuppliesMaxim cannot assume responsibility for use of any circuitry other than circui

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Página 35 - Package Information

MAX1566/MAX1567Six-Channel, High-Efficiency, DigitalCamera Power Supplies_____________________________________________________________________________

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Rainbow-electronics MAX1567 Manual do Utilizador Página 1

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics MAX1567. Rainbow Electronics MAX1567 User Manual Manual do Utilizador

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Rainbow-electronics MAX1567 Manual do Utilizador Página 1

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics MAX1567. Rainbow Electronics MAX1567 User Manual Manual do Utilizador

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