Datasheet AD8452 (Analog Devices) - 10

link to page 11
Data Sheet AD8452 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS T EF ND CC CC N P V INT VR AG AV ISET ISMEA IVE0 IVE1 V AV CL CL CL 48 47 46 45 44 43 42 41 40 39 38 37 ISREFH 1 36 FREQ ISREFL 2 35 DMAX ISREFLS 3 34 SS ISVP 4 33 DT ISVN 5 32 DGND AD8452 BVP 6 31 DH TOP VIEW BVPS 7 30 (Not to Scale) DL BVN 8 29 VIN BVNS 9 28 VREG BVREFL 10 27 SCFG BVREFLS 11 26 SYNC BVREFH 12 25 CLFLG 13 14 15 16 17 18 19 20 21 22 23 24 B T DE EN
002
VEE INT VEE O A VSET VVP0 VMEA VVE0 VVE1 V A M AUL B VSET F
16187- Figure 2. Pin Configuration
Table 8. Pin Function Descriptions Pin No. Mnemonic Type1 Description
1 ISREFH Input Reference Input for the Current Sense Amplifier. Connect this pin to the VREF pin to shift the current-sense instrumentation amplifier output by 12.5 mV. Otherwise, connect this pin to the ISREFL pin. 2 ISREFL Input Reference Input for the Current Sense Amplifier. The default connection is to ground. 3 ISREFLS Test Kelvin Sense Pin for the ISREFL Pin. 4 ISVP Input Current Sense Instrumentation Amplifier Positive (Noninverting) Input. Connect this pin to the high side of the current sense shunt. 5 ISVN Input Current Sense Instrumentation Amplifier Negative (Inverting) Inputs. Connect this pin to the low side of the current sense shunt. 6 BVP Input Battery Voltage Difference Amplifier Positive (Noninverting) Input. 7 BVPS Test Kelvin Sense Pin for the Battery Voltage Difference Amplifier Input, BVP. 8 BVN Input Battery Voltage Difference Amplifier Negative (Inverting) Input. 9 BVNS Test Kelvin Sense Pin for the Battery Voltage Difference Amplifier Input, BVN. 10 BVREFL Input Reference Input for the Voltage Sense Difference Amplifier. The default connection for this pin is to ground. 11 BVREFLS Test Kelvin Sense Pin for the BVREFL Pin. 12 BVREFH Input Reference Input for the Difference Amplifier. Connect to the VREF pin to level shift VBVMEA by approximately 12.5 mV. Otherwise, connect this pin to the BVREFL pin. 13, 21 AVEE N/A Analog Negative Supply Pins. 14 VSET Input Scaled CV Loop Control Input for Battery Charge or Discharge Cycle. 15 VVP0 Input Noninverting CV Loop Filter Amplifier Input for Discharge Mode. 16 BVMEA Output Scaled Battery Voltage, Difference Amplifier Output. 17 VSETB Output Buffered VSET Voltage. 18 VVE0 Input Inverting Input of the CV Loop Filter Amplifier When in Discharge Mode. 19 VVE1 Input Inverting Input of the CV Loop Filter Amplifier When in Charge Mode. 20, 41 VINT Output Aggregated Result of the Battery Voltage and Current Sense Integration. 22 MODE Logic input Logic Level Input to Select between Charge and Discharge Modes. Bring this pin low for discharge mode, and bring this pin high for charge mode. 23 EN Logic input Logic Level Enable Input. Drive EN logic low to shut down the device. Drive EN logic high to turn on the device. 24 FAULT Logic input External Fault Comparator Connection. When not connected, this pin is pulled up using a 10 kΩ resistor to the VREG pin. The DH and DL drivers are disabled when FAULT is low, and are enabled when FAULT is high. Rev. 0 | Page 9 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