Data Sheet ADBT1002 4-Channel AFE, Digital Controller, and PWM for Battery Formation and Testing FEATURES APPLICATIONS Precise measurement of the voltage and current Battery formation and testing 4 PWM control channels up to 14 bits (effective) resolution High efficiency battery test systems with recycle capability Selectable synchronous and asynchronous rectifier operation Battery conditioning (charging and discharging) systems Programmable dead time compensation GENERAL DESCRIPTION Programmable switching frequency from 62.5 kHz to 500 kHz in powers of 2 steps The ADBT1002 is a flexible, feature rich digital controller that tar- Multiphase operation gets high volume battery testing and formation manufacturing and precision battery test instrumentation applications. The ADBT1002 Interchip digital current sharing is optimized for minimal component count, maximum flexibility, and Interchip frequency synchronization minimum design time. Features include differential remote voltage Digital control loop sense, current sense, pulse-width modulation (PWM) generation, Programmable PID loop filters frequency synchronization, overvoltage protection (OVP), and cur- Fast dc bus voltage feedforward rent sharing. Programmable protection features include overcurrent Integrated spectrum analysis per channel protection (OCP), OVP limiting, and external overtemperature pro- tection (OTP). SPI port control and status interface Host interrupt on programmable status changes Parameters can be programmed over the serial peripheral interface Constant current and constant voltage operating modes (SPI), providing extensive programming of the integrated loop filter, 15-bit setpoint resolution PWM signal timing, and soft start timing. The SPI provides access to the many monitoring and system test functions. Reliability is Input and output inrush current protection improved through a built-in checksum and programmable protection External NTC thermistor temperature sensing circuits. Internal die temperature measurement A comprehensive graphical user interface (GUI) is provided for User calibration of input voltages and currents simple system and channel configuration and programming of 0C to 85C operation the safety features. The ADBT1002 is available in a 100-lead LQFP EP. TYPICAL APPLICATION DIAGRAM Figure 1. Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliableas i. However, no responsibility is assumed by Analog DOCUMENT FEEDBACK 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 TECHNICAL SUPPORT registered trademarks are the property of their respective owners.Data Sheet ADBT1002 TABLE OF CONTENTS Features................................................................ 1 Supports Precharge Operation.........................15 Applications........................................................... 1 Sequencer........................................................... 16 General Description...............................................1 Instruction Definition.........................................16 Typical Application Diagram.................................. 1 Sequencing Modes...........................................16 Specifications........................................................ 3 Charge and Discharge Instruction Modes........18 Analog Front End and Controller Charge and Discharge Instruction Limits......... 18 Specifications................................................... 3 Slew Rate.........................................................19 Absolute Maximum Ratings...................................8 Parallel Operation.............................................19 Thermal Resistance........................................... 8 Flags.................................................................19 Soldering............................................................ 8 Global Register Settings...................................20 Electrostatic Discharge (ESD) Ratings...............8 Channel Static Settings....................................20 ESD Caution.......................................................8 Instruction Set Architecture.............................. 20 Pin Configuration and Function Descriptions........ 9 Sequencer Operation Example........................ 24 Theory of Operation.............................................13 Memory Mapped Registers................................. 25 Overview.......................................................... 13 Host SPI Interface Details................................... 37 Analog Front End............................................. 14 SPI Overview....................................................37 Digital Controller...............................................14 Communications Protocols...............................37 Host SPI........................................................... 14 Applications Information...................................... 39 Host Interrupt Request..................................... 14 Calibration........................................................ 39 Clocking............................................................14 Diagnostics.......................................................39 GPIOx Pins.......................................................14 Operating Use Cases.......................................39 Auxiliary ADC................................................... 14 Outline Dimensions............................................. 44 Supports Coulombic Efficiency Measurement..14 Ordering Guide.................................................44 analog.com Rev. 0 2 of 44