MAX17040 데이터 시트보기 (PDF) - Maxim Integrated

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MAX17040

1-Cell/2-Cell Fuel Gauge with ModelGauge

Maxim Integrated 

MAX17040/MAX17041

1-Cell/2-Cell Fuel Gauge with ModelGauge

BATTERY

PROTECTION IC

(Li+/POLYMER)

PACK+

1kΩ

1µF

PACK-

SYSTEM

MAX17040 SEO

VDD

CELL

EO

CTG

SDA

GND

SCL

EP

150Ω

SYSTEM

µP

32kHz

OSCILLATOR

OUTPUT

I2C BUS

MASTER

10nF

SYSTEM VDD

SYSTEM GND

Figure 5. MAX17040 Application Example with External Clock

BATTERY

PROTECTION IC

(Li+/POLYMER)

PACK+

1kΩ

1µF

PACK-

SYSTEM

MAX17041

CELL

VDD

SEO

EO

CTG

SDA

GND

SCL

EP

SYSTEM

PMIC

3.3V OUTPUT

WATCHDOG

I2C BUS

MASTER

SYSTEM

µP

SYSTEM VDD

SYSTEM GND

Figure 6. MAX17041 Application Example with Hardware Reset

2-Wire Bus System

The 2-wire bus system supports operation as a slave-only

device in a single or multislave, and single or multimaster

system. Slave devices can share the bus by uniquely

setting the 7-bit slave address. The 2-wire interface

consists of a serial data line (SDA) and serial clock line

(SCL). SDA and SCL provide bidirectional communication

between the MAX17040/MAX17041 slave device and a

master device at speeds up to 400kHz. The MAX17040/

MAX17041s’ SDA pin operates bidirectionally; that is,

when the MAX17040/MAX17041 receive data, SDA oper-

ates as an input, and when the MAX17040/MAX17041

return data, SDA operates as an open-drain output,

with the host system providing a resistive pullup. The

MAX17040/MAX17041 always operate as a slave device,

receiving and transmitting data under the control of a

master device. The master initiates all transactions on the

bus and generates the SCL signal, as well as the START

and STOP bits, which begin and end each transaction.

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