Datasheet AD8452 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | Precision Integrated Analog Front End, Controller, and PWM for Battery Test and Formation Systems |
| Pages / Page | 35 / 3 — AD8452. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY. 10/2017—Revision … |
| Revision | A |
| File Format / Size | PDF / 754 Kb |
| Document Language | English |
AD8452. Data Sheet. TABLE OF CONTENTS. REVISION HISTORY. 10/2017—Revision 0: Initial Version
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AD8452 Data Sheet TABLE OF CONTENTS
Features .. 1 Shutdown ... 24 Applications ... 1 Undervoltage Lockout (UVLO) ... 24 General Description ... 1 Soft Start .. 24 Functional Block Diagram .. 1 PWM Drive Signals .. 25 Revision History ... 2 Peak Current Protection and Diode Emulation Specifications ... 3 (Synchronous) ... 25 Analog Front-End and Controller Specifications .. 3 Frequency and Phase Control .. 26 Pulse-Width Modulator Specifications ... 5 Maximum Duty Cycle ... 26 Digital Interface Specifications ... 6 Fault Input ... 27 Power Supply ... 7 Thermal Shutdown (TSD) .. 27 Temperature Range Specifications ... 7 Applications Information .. 28 Absolute Maximum Ratings .. 8 Analog Controller .. 28 Thermal Resistance .. 8 Functional Description .. 28 ESD Caution .. 8 Power Supply Connections ... 29 Pin Configuration and Function Descriptions ... 9 Current Sense In-Amp Connections ... 29 Typical Performance Characteristics ... 11 Voltage Sense Differential Amplifier Connections .. 29 In-Amp Characteristics ... 11 Battery Current and Voltage Control Inputs (ISET and VSET) .. 29 Difference Amplifier Characteristics ... 12 Loop Filter Amplifiers ... 30 CC and CV Loop Filter Amplifiers and VSET Buffer (except where Noted) ... 13 Selecting Charge or Discharge Options .. 30 Reference Characteristics .. 15 Select RCL and RCLVT for the Peak Current Limit .. 30 Pulse-Width Modulator ... 16 Setting the Operating Frequency and Programming the Synchonization Pin .. 31 Theory of Operation .. 18 Programming the Maximum Duty Cycle ... 32 Introduction .. 18 Selecting CSS .. 33 Instrumentation Amplifier (In-Amp) ... 19 Additional Information ... 33 Difference Amplifier .. 20 Outline Dimensions ... 34 CC and CV Loop Filter Amplifiers .. 20 Ordering Guide .. 34 Charge and Discharge Control ... 23 Input and Output Supply Pins .. 23
REVISION HISTORY 10/2017—Revision 0: Initial Version
Rev. 0 | Page 2 of 34 Document Outline Features Applications General Description Functional Block Diagram Table of Contents Revision History Specifications Analog Front-End and Controller Specifications Pulse-Width Modulator Specifications Digital Interface Specifications Power Supply Temperature Range Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics In-Amp Characteristics Difference Amplifier Characteristics CC and CV Loop Filter Amplifiers and VSET Buffer (except where Noted) Reference Characteristics Pulse-Width Modulator Theory of Operation Introduction Instrumentation Amplifier (In-Amp) Reversing Polarity When Charging and Discharging In-Amp Offset Option Battery Reversal and Overvoltage Protection Difference Amplifier CC and CV Loop Filter Amplifiers Charging Lithium-Ion (Li-Ion) Cells Concepts of Constant Current (CC) and Constant Voltage (CV) Compensation Charge and Discharge Control Conditions to Charge and Discharge a Battery MODE Pin Input and Output Supply Pins Shutdown Undervoltage Lockout (UVLO) Soft Start PWM Drive Signals Peak Current Protection and Diode Emulation (Synchronous) Peak Current-Limit Detection Diode Emulation/Synchronous Mode Operation Frequency and Phase Control Internal Frequency Control External Frequency Control Operating Frequency Phase Shift Maximum Duty Cycle Fault Input Thermal Shutdown (TSD) Applications Information Analog Controller Functional Description Power Supply Connections Current Sense In-Amp Connections Current Sensors Optional Low-Pass Filter Voltage Sense Differential Amplifier Connections Battery Current and Voltage Control Inputs (ISET and VSET) Loop Filter Amplifiers Selecting Charge or Discharge Options Select RCL and RCLVT for the Peak Current Limit Setting the Operating Frequency and Programming the Synchonization Pin Select RFREQ for Standalone or Master Clock Selecting RFREQ for a Slave Device Programming the External Clock Phase Shift Programming the Dead Time Programming the Maximum Duty Cycle Selecting CSS Additional Information Outline Dimensions Ordering Guide
AD8452 Data Sheet TABLE OF CONTENTS
Features .. 1 Shutdown ... 24 Applications ... 1 Undervoltage Lockout (UVLO) ... 24 General Description ... 1 Soft Start .. 24 Functional Block Diagram .. 1 PWM Drive Signals .. 25 Revision History ... 2 Peak Current Protection and Diode Emulation Specifications ... 3 (Synchronous) ... 25 Analog Front-End and Controller Specifications .. 3 Frequency and Phase Control .. 26 Pulse-Width Modulator Specifications ... 5 Maximum Duty Cycle ... 26 Digital Interface Specifications ... 6 Fault Input ... 27 Power Supply ... 7 Thermal Shutdown (TSD) .. 27 Temperature Range Specifications ... 7 Applications Information .. 28 Absolute Maximum Ratings .. 8 Analog Controller .. 28 Thermal Resistance .. 8 Functional Description .. 28 ESD Caution .. 8 Power Supply Connections ... 29 Pin Configuration and Function Descriptions ... 9 Current Sense In-Amp Connections ... 29 Typical Performance Characteristics ... 11 Voltage Sense Differential Amplifier Connections .. 29 In-Amp Characteristics ... 11 Battery Current and Voltage Control Inputs (ISET and VSET) .. 29 Difference Amplifier Characteristics ... 12 Loop Filter Amplifiers ... 30 CC and CV Loop Filter Amplifiers and VSET Buffer (except where Noted) ... 13 Selecting Charge or Discharge Options .. 30 Reference Characteristics .. 15 Select RCL and RCLVT for the Peak Current Limit .. 30 Pulse-Width Modulator ... 16 Setting the Operating Frequency and Programming the Synchonization Pin .. 31 Theory of Operation .. 18 Programming the Maximum Duty Cycle ... 32 Introduction .. 18 Selecting CSS .. 33 Instrumentation Amplifier (In-Amp) ... 19 Additional Information ... 33 Difference Amplifier .. 20 Outline Dimensions ... 34 CC and CV Loop Filter Amplifiers .. 20 Ordering Guide .. 34 Charge and Discharge Control ... 23 Input and Output Supply Pins .. 23
REVISION HISTORY 10/2017—Revision 0: Initial Version
Rev. 0 | Page 2 of 34 Document Outline Features Applications General Description Functional Block Diagram Table of Contents Revision History Specifications Analog Front-End and Controller Specifications Pulse-Width Modulator Specifications Digital Interface Specifications Power Supply Temperature Range Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics In-Amp Characteristics Difference Amplifier Characteristics CC and CV Loop Filter Amplifiers and VSET Buffer (except where Noted) Reference Characteristics Pulse-Width Modulator Theory of Operation Introduction Instrumentation Amplifier (In-Amp) Reversing Polarity When Charging and Discharging In-Amp Offset Option Battery Reversal and Overvoltage Protection Difference Amplifier CC and CV Loop Filter Amplifiers Charging Lithium-Ion (Li-Ion) Cells Concepts of Constant Current (CC) and Constant Voltage (CV) Compensation Charge and Discharge Control Conditions to Charge and Discharge a Battery MODE Pin Input and Output Supply Pins Shutdown Undervoltage Lockout (UVLO) Soft Start PWM Drive Signals Peak Current Protection and Diode Emulation (Synchronous) Peak Current-Limit Detection Diode Emulation/Synchronous Mode Operation Frequency and Phase Control Internal Frequency Control External Frequency Control Operating Frequency Phase Shift Maximum Duty Cycle Fault Input Thermal Shutdown (TSD) Applications Information Analog Controller Functional Description Power Supply Connections Current Sense In-Amp Connections Current Sensors Optional Low-Pass Filter Voltage Sense Differential Amplifier Connections Battery Current and Voltage Control Inputs (ISET and VSET) Loop Filter Amplifiers Selecting Charge or Discharge Options Select RCL and RCLVT for the Peak Current Limit Setting the Operating Frequency and Programming the Synchonization Pin Select RFREQ for Standalone or Master Clock Selecting RFREQ for a Slave Device Programming the External Clock Phase Shift Programming the Dead Time Programming the Maximum Duty Cycle Selecting CSS Additional Information Outline Dimensions Ordering Guide
