Datasheet > AD8452

AD8452

更新时间： 2024-09-26 01:12:35

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
35页	743K
描述
Precision Integrated Analog Front End, Controller

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AD8452 数据手册

Precision Integrated Analog Front End, Controller,

and PWM for Battery Test and Formation Systems

Data Sheet

AD8452

FEATURES

GENERAL DESCRIPTION

CC and CV battery test and formation modes with

The AD8452 combines a precision analog front-end controller

transparent and automatic switchover, for systems of

20 Ah or less

Precise measurement of voltage and current

Independent feedback control blocks

Highly accurate, factory trimmed instrumentation and

differential amplifiers

In-amp for current sense gain: 66 V/V

Difference amplifier for voltage sense gain: 0.4 V/V

Stable over temperature: offset voltage drift <0.6 μV/°C

(maximum)

and switch mode power supply (SMPS), pulse-width modulator

(PWM) driver into a single silicon platform for high volume

battery testing and formation manufacturing. A precision

instrumentation amplifier (in-amp) measures the battery charge/

discharge current to better than ±±.ꢀ1 accuracy, while an equally

accurate difference amplifier measures the battery voltage.

Internal laser trimmed resistor networks establish the in-amp

and difference amplifier gains (66 V/V and ±.4 V/V, respectively),

and stabilize the AD8452 performance across the rated

operating temperature range.

Gain drift: <3 ppm/°C (maximum)

Desired battery cycling current and voltage levels are established

by applying precise control voltages to the ISET and VSET

inputs. Actual charge and discharge current levels are sensed

(usually by a high power, highly accurate shunt resistor) whose

value is carefully selected according to system parameters.

Switching between constant current (CC) and constant voltage

(CV) loop integration is instantaneous, automatic, and completely

transparent to the observer. A logic high at the MODE input

selects the charge or discharge mode (high for charge, low for

discharge).

Current sense CMRR: 120 dB minimum

Popular SMPS control for charge/discharge

High PWM linearity with internal ramp voltage

50 kHz to 300 kHz user controlled switching frequency

Synchronization output or input with adjustable phase shift

Programmable soft start

APPLICATIONS

Battery formation and testing

High efficiency battery test systems with recycle capability

Battery conditioning (charging and discharging) systems

The AD8452 simplifies designs by providing excellent

performance, functionality, and overall reliability in a space

saving 48-lead, 7 mm × 7 mm × ꢀ.4 mm LQFP package rated

for operation at temperatures from −4±°C to +85°C.

FUNCTIONAL BLOCK DIAGRAM

LOOP

COMP (×4)

SYSTEM CONTROL

VCL

+DCBUS

VIN

SYNC

SCFG

CC FILTER

AMPLIFIER

VCL

MODE

MOSFET

DRIVER

VBAT

IBAT

SELECT

DIFF IN-AMP

AMP

PWM

×1

CV FILTER

AMPLIFIER

CLVT

ISREFH/

ISREFL

BVREFH/

BVREFL

FREQ

DMAX

VREF

0.4×

66×

AD8452

FAULT

DGND

ISV

Figure 1.

Rev. 0

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice.

No license is granted by implication or otherwise under any patent or patent rights of Analog

Devices.Trademarks and registered trademarks are theproperty of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Technical Support

www.analog.com

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与AD8452相关器件

型号	品牌	获取价格	描述	数据表
AD8452ASTZ	ADI	获取价格	Precision Integrated Analog Front End, Controller, and PWM for Battery Test and Formation
AD8452ASTZ-RL	ADI	获取价格	Precision Integrated Analog Front End, Controller
AD8452-EVALZ	ADI	获取价格	Precision Integrated Analog Front End, Controller
AD8456-A	COILCRAFT	获取价格	Telecom Transformer
AD845AQ	ADI	获取价格	Precision, 16 MHz CBFET Op Amp
AD845BQ	ADI	获取价格	Precision, 16 MHz CBFET Op Amp
AD845BQ	ROCHESTER	获取价格	OP-AMP, 400uV OFFSET-MAX, 16MHz BAND WIDTH, CDIP8, HERMETIC SEALED, CERDIP-8
AD845JCHIPS	ADI	获取价格	Precision, 16 MHz CBFET Op Amp
AD845JN	ADI	获取价格	Precision, 16 MHz CBFET Op Amp
AD845JN	ROCHESTER	获取价格	OP-AMP, 2500uV OFFSET-MAX, 16MHz BAND WIDTH, PDIP8, MINI, PLASTIC, DIP-8

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