MAX1811ESA+Tmaxim美信芯片电子元器件中文版规格手册.pdf资源-CSDN文库

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General Description

The MAX1811 is a single-cell lithium-ion (Li+) battery

charger that can be powered directly from a USB port* or

from an external supply up to 6.5V. It has a 0.5% overall

battery regulation voltage accuracy to allow maximum

utilization of the battery capacity.

The charger uses an internal FET to deliver up to 500mA

charging current to the battery. The device can be

configured for either a 4.1V or 4.2V battery, using the

SELV input. The SELI input sets the charge current to

either 100mA or 500mA. An open-drain output (CHG)

indicates charge status.

The MAX1811 has preconditioning that soft-starts a

near-dead battery cell before charging. Other safety

features include continuous monitoring of voltage and

current and initial checking for fault conditions before

charging.

The MAX1811 is available in a small 1.4W thermally

enhanced 8-pin SO package.

Applications

● PDAs and Palmtops

● Digital Still Cameras

● MP3 Players

● Cell Phones

● Two-Way Pagers

● Hand-Held Computers

Features

● Charges Single-Cell Li+ Batteries Directly from

USB Port

● 0.5% Overall Charging Accuracy

● Minimal External Components

● Input Diode Not Required

● Automatic IC Thermal Regulation

● Preconditions Near-Depleted Cells

● Convenient Power SO-8 Package (1.4W)

19-2024; Rev 3; 4/19

PART TEMP RANGE PIN-PACKAGE

MAX1811ESA -40°C to +85°C 8 SO

Ordering Information

Typical Operating Circuit Typical Operating Circuit

MAX1811

SELI

SELV

4.35V TO 6.5V

4.2V

4.1V

OFF

100mA

500mA

BATT

GND

CHG

TO IN

TO LOAD

SINGLE

Li+

CELL

CHG

LOGIC OUT

LED

GND

BATTIN

CHG

ENSELI

GND

SELV

TOP VIEW

MAX1811

USB-Powered Li+ Charger

Click here for production status of specific part numbers.

IN, BATT, SELI, CHG, EN to GND ............................-0.3V to 7V

SELV to GND .............................................-0.3V to (V

+ 0.3V)

Continuous Power Dissipation (T

= +70°C)

8-Pin SO (derate 17.5mW/°C above +70°C) ................... 1.4W

Short-Circuit Duration ................................................ Continuous

Operating Temperature Range ........................... -40°C to +85°C

Storage Temperature Range ............................ -65°C to +150°C

Maximum Die Temperature .............................................+150°C

Lead Temperature (soldering, 10s) .................................+300°C

= 4.5V, EN = IN, T

= 0°C to +85°C, unless otherwise noted.)

PARAMETER CONDITIONS MIN TYP MAX UNITS

Input Supply Voltage 4.35 6.50 V

Input Undervoltage Lockout I

rising 3.75 4.05 V

Input Undervoltage Lockout Hysteresis 50 mV

Input Supply Current

Operating, EN = IN, no load 0.9 2.0 mA

Shutdown, EN = GND 2.5 5.0 µA

Charging Headroom

SELI = GND (100mA mode),

= 4.35V

100

SELI = IN (500mA mode) 200

Precondition Threshold

BATT rising, transition from precondition

to charge mode

2.3 2.5 2.7 V

Precondition Threshold Hysteresis 80 mV

CHG Output Leakage Current V

= V

CHG

= 6.5V 0.1 1.0 µA

CHG Output Low Voltage I

SINK

= 10mA 0.4 V

Charging Current

SELI

= V

= 5.5V, V

BATT

= 2.7V 455 500

mASELI = GND, V

= 5.5V, V

BATT

= 2.7V 85 100

BATT

= 2V, SELI = GND or IN 20 43 70

BATT Regulation Voltage

SELV = GND, I

BATT

= 0 4.08 4.10 4.12

SELV = IN, I

BATT

= 0 4.18 4.20 4.22

BATT Leakage Current

(Input Power Removed)

BATT

= 4.2V, EN = IN = GND 1 5 µA

BATT Shutdown Current EN = GND, V

BATT

= 4.2V 0.1 2 µA

Logic Input Low Voltage (EN, SELI, SELV) V

= 4.35V to 6.5V 0.8 V

Logic Input High Voltage (EN, SELI, SELV) V

= 4.35V to 6.5V 2.0 V

Logic Input Leakage Current (EN, SELI) V

= 0 to 6.5V; V

SELI

, V

= 6.5V or GND 1 µA

Logic Input Leakage Current (SELV) V

= 0 to 6.5V, V

SELV

= V

or GND 1 µA

Thermal Regulation

Die temperature beyond which charging

current is reduced

125 °C

Absolute Maximum Ratings

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these

or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect

device reliability.

Electrical Characteristics

MAX1811 USB-Powered Li+ Charger

www.maximintegrated.com

Maxim Integrated

│

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