Rainbow-electronics MAX8804Z Manual de usuario descargar pdf

General Description

The MAX8804Y/MAX8804Z intelligent, dual-input,

stand-alone, constant-current, constant-voltage

(CCCV), thermally regulated linear chargers are

designed for a single-cell lithium-ion (Li+) battery. They

integrate the current-sense circuit, MOS pass element,

thermal-regulation circuitry, and overvoltage protection

(OVP), and eliminate the reverse-blocking Schottky

diode to create a simple and small charging solution for

handheld equipment.

The MAX8804Z functions as a stand-alone charger to

control the charging sequence from the prequalification

state through fast-charge, top-off charge, and full-

charge indication. The MAX8804Y eliminates the pre-

qualification state to allow startup into a load without a

battery. Proprietary thermal-regulation circuitry limits

the die temperature when fast-charging or while

exposed to high ambient temperatures, allowing maxi-

mum charging current without damaging the IC.

The MAX8804Y/MAX8804Z achieve high flexibility by

providing an adjustable DC/USB fast-charge current

through a simple single-wire interface (SET input). The

chargers automatically select between either a USB or

AC adapter input source. The AC adapter charge cur-

rent is programmable from 400mA to 700mA in 50mA

steps through a serial interface. The USB charge cur-

rent is programmable to 95mA, 380mA, or 475mA

through the same interface. Other features include an

active-low battery charging-status indicator (CHG), an

active-low power-OK indicator (POK), and an active-low

USB input detection output (USBPWR).

The MAX8804Y/MAX8804Z accept a 4.15V to 30V DC

source voltage or a 4.15V to 16V USB input voltage, but

disable charging when either input voltage exceeds

7.5V to protect against unqualified or faulty input

sources. The MAX8804Y/MAX8804Z operate over the

extended temperature range (-40°C to +85°C) and are

available in a tiny 8-pin thermally enhanced 2mm x

3mm TDFN package.

Applications

Cell Phones/Smartphones

Digital Cameras

Portable Media Players

MP3 Players

Other Handheld Devices

Features

♦ Complete Chargers for Single-Cell Li+ Battery

♦ Dual-Input, 30V AC Adapter/16V USB

♦ No External FET, Blocking Diode, or Sense

Resistor Required

♦ Automatic USB/AC Adapter Input Selection

♦ Easy Programmable Fast-Charge Current and

Top-Off Threshold

♦ Proprietary Die Temperature Regulation Control

♦ ±5% Fast-Charge Current-Limit Accuracy

♦ Power-Present and Charger-Status Outputs

♦ No Prequalification Charge (MAX8804Y)

♦ Tiny 2mm x 3mm Thermally Enhanced TDFN

Package

♦ USB Charging Protected by US Patent #6,507,172

MAX8804Y/MAX8804Z

High-Voltage, Dual-Input, USB/AC

Adapter Chargers in 2mm x 3mm TDFN

________________________________________________________________

Maxim Integrated Products

19-0785; Rev 0; 4/07

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.

Ordering Information

EP = Exposed paddle.

Denotes a lead-free package.

Note: All devices are specified to operate over the -40°C to

+85°C operating temperature range.

PART

PIN-

PACKAGE

PKG

CODE

TOP

MARK

MAX8804YETA+ 8 TDFN-EP* T823+1 AAD

MAX8804ZETA+ 8 TDFN-EP* T823+1 AAC

Pin Configuration appears at end of data sheet.

GND

USB

SET

CHG

POK

USBPWR

BAT

+3.3V

ADAPTER

USB

PORT

ENABLE/DISABLE

AND PROGRAMMING

Li+

1μF

2.2μF

MAX8804Y

MAX8804Z

1μF

Typical Application Circuit

1 2 3 4 5 6 ... 14 15

MAX8804Y/MAX8804Z 1

Indice de contenidos

Pagina 1 - MAX8804Y/MAX8804Z

General DescriptionThe MAX8804Y/MAX8804Z intelligent, dual-input,stand-alone, constant-current, constant-voltage(CCCV), thermally regulated linear cha

Pagina 2

MAX8804Y/MAX8804ZUSB Charge ModeDrive SET high to enable USB charging mode when theUSB input is valid. Subsequent low pulses with 1µs to1ms pulse widt

Pagina 3

Soft-StartThe soft-start circuitry activates when entering fast-charge mode. In the MAX8804Y, soft-start is entereddirectly after being enabled, and t

Pagina 4

MAX8804Y/MAX8804ZPower-OK Monitor (POK)The MAX8804Y/MAX8804Z contain an open-drain POKoutput that goes low when a valid input source isdetected at eit

Pagina 5

Layout and BypassingConnect the input capacitors as close as possible tothe IC. Provide a large copper GND plane to allow theexposed paddle to sink he

Pagina 6

MAX8804Y/MAX8804ZHigh-Voltage, Dual-Input, USB/ACAdapter Chargers in 2mm x 3mm TDFN14 ________________________________________________________________

Pagina 7

MAX8804Y/MAX8804ZHigh-Voltage, Dual-Input, USB/ACAdapter Chargers in 2mm x 3mm TDFNMaxim cannot assume responsibility for use of any circuitry other t

Pagina 8

MAX8804Y/MAX8804ZHigh-Voltage, Dual-Input, USB/ACAdapter Chargers in 2mm x 3mm TDFN2 _________________________________________________________________

Pagina 9

MAX8804Y/MAX8804ZHigh-Voltage, Dual-Input, USB/ACAdapter Chargers in 2mm x 3mm TDFN___________________________________________________________________

Pagina 10

MAX8804Y/MAX8804ZHigh-Voltage, Dual-Input, USB/ACAdapter Chargers in 2mm x 3mm TDFN4 _________________________________________________________________

Pagina 11

MAX8804Y/MAX8804ZHigh-Voltage, Dual-Input, USB/ACAdapter Chargers in 2mm x 3mm TDFN___________________________________________________________________

Pagina 12

MAX8804Y/MAX8804ZHigh-Voltage, Dual-Input, USB/ACAdapter Chargers in 2mm x 3mm TDFN6 _________________________________________________________________

Pagina 13

MAX8804Y/MAX8804ZHigh-Voltage, Dual-Input, USB/ACAdapter Chargers in 2mm x 3mm TDFNDetailed DescriptionThe MAX8804Y/MAX8804Z dual-input linear battery

Pagina 14

MAX8804Y/MAX8804ZDC ChargingThe MAX8804Y/MAX8804Z are designed to charge asingle-cell Li+ battery from a DC source voltagebetween 4.15V and 7V and wit

Pagina 15

DC/USB Mode andCharging Current SettingSET is a logic input that sets DC/USB charging modeand charging current. Drive SET low or leave it uncon-nected

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Rainbow-electronics MAX8804Z Manual de usuario

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