Datasheet > MAX14921

MAX14921

更新时间： 2024-09-25 14:58:11

品牌	Logo	应用领域
亚德诺 - ADI		电池
页数	文件大小	规格书
30页	798K
描述
高精度12/16节电池测量AFE

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MAX14921 数据手册

EVALUATION KIT AVAILABLE

MAX14920/MAX14921

High-Accuracy 12-/16-Cell Measurement AFEs

General Description

Benefits and Features

The MAX14920/MAX14921 battery measurement analog

front-end devices accurately sample cell voltages and

provide level shifting for primary/secondary battery packs

up to 16 cells/+65V (max). The MAX14920 monitors up

to 12 cells, while the MAX14921 monitors up to 16 cells.

Both devices simultaneously sample all cell voltages,

allowing accurate state-of-charge and source-resistance

determination. All cell voltages are level shifted to ground

reference with unity gain, simplifying external ADC data

conversion.

S High Accuracy

ꢀꢀ0.5mV (max) Cell Voltage Error

ꢀSimultaneous Cell Voltage Sampling

ꢀSelf-Calibration

S Integrated Diagnostics

ꢀꢀOpen-Wire and Short Fault Detection

ꢀꢀUndervoltage/Overvoltage Warning

ꢀꢀThermal Shutdown

S High Flexibility

The devices have a low-noise, low-offset amplifier that

buffers differential voltages of up to +5V, allowing moni-

toring of all common lithium-ion (Li+) cell technologies.

The resulting cell voltage error is Q0.5mV.

ꢀꢀSPI Interface

ꢀꢀ12-Cell and 16-Cell Versions

ꢀꢀ+6V Minimum (3 Cells) Operation

ꢀꢀ+0.5V to +4.5V Cell Voltage Range

ꢀꢀIntegrated Cell-Balancing FET Drivers

ꢀꢀIntegrated 5V LDO

The devices’ high accuracy make them ideal for monitoring

cell chemistries with very flat discharge curves, such as

lithium-metal phosphate.

Passive-cell balancing is supported by external FET

drivers. Integrated diagnostics in the devices allow

open-wire detection and undervoltage/overvoltage

alarms. The devices are controlled by a daisy-chainable

SPI interface.

S Low Power

ꢀꢀ1µA Shutdown Mode

ꢀꢀ1µA/10µA Cell Current Draw

The MAX14920 is available in a 64-pin (10mm x 10mm)

TQFP package with an exposed pad. The MAX14921 is

available in an 80-pin (12mm x 12mm) TQFP package.

Both devices are specified over the -40°C to +85°C

extended temperature range.

Ordering Information appears at end of data sheet.

Functional Diagram appears at end of data sheet.

Applications

Industrial Battery Backup Systems

Telecom Battery Backup Systems

Energy Storage Packs

e-Transportation Energy Packs

For pricing, delivery, and ordering information, please contact Maxim Direct

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

19-6496; Rev 3; 3/15

12 3 4 5 6 7...30

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与MAX14921相关器件

型号	品牌	获取价格	描述	数据表
MAX14921ECS+T	MAXIM	获取价格	Analog Circuit, 1 Func, BICMOS, PQFP80, 12 X 12 MM, ROHS COMPLIANT, TQFP-80
MAX14921EVKIT	MAXIM	获取价格	A high-acuuracy 16-cell battery-management reference design
MAX14922	ADI	获取价格	带限流功能的高端开关控制器
MAX1492CAI	MAXIM	获取价格	3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers
MAX1492CAI+	MAXIM	获取价格	暂无描述
MAX1492CAI+T	MAXIM	获取价格	ADC, Proprietary Method, 1 Func, 1 Channel, BICMOS, PDSO28, 5.30 MM, MO-150, SSOP-28
MAX1492CNI	MAXIM	获取价格	3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers
MAX1492CNI+	MAXIM	获取价格	ADC, Delta-Sigma, 1 Func, 1 Channel, BICMOS, PDIP28, 0.300 INCH, MO-058, PDIP-28
MAX1493	MAXIM	获取价格	3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers
MAX1493	ADI	获取价格	3位半和4位半、单片ADC，带有LCD驱动器

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