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LTC1760 View Datasheet(PDF) - Linear Technology

Part Name
Description
MFG CO.
LTC1760
Linear
Linear Technology Linear
'LTC1760' PDF : 44 Pages View PDF
LTC1760
TABLE OF CONTENTS (For Operation Section)
1 Overview ............................................................................................................................................................................................. 13
2 The SMBus Interface .......................................................................................................................................................................... 13
2.1 SMBus Interface Overview............................................................................................................................................................... 13
2.2 Data Bit Definition of Supported SMBus Functions. ......................................................................................................................... 14
2.3 Description of Supported SMBus Functions .................................................................................................................................... 17
2.3.1 BatterySystemState() (0×01) ....................................................................................................................................................... 17
2.3.2 BatterySystemStateCont() (0×02) ................................................................................................................................................ 18
2.3.3 BatterySystemInfo() (0×04) ......................................................................................................................................................... 19
2.3.4 LTC() (0×3C) ................................................................................................................................................................................ 20
2.3.5 BatteryMode() (0×03) .................................................................................................................................................................. 20
2.3.6 Voltage() (0×09)........................................................................................................................................................................... 20
2.3.7 Current() (0×0A) .......................................................................................................................................................................... 21
2.3.8 ChargingCurrent() (0×14) ............................................................................................................................................................ 21
2.3.9 ChargingVoltage() (0×15) ............................................................................................................................................................ 21
2.3.10 AlarmWarning() (0×16)................................................................................................................................................................ 21
2.3.11 AlertResponse() ........................................................................................................................................................................... 22
2.4 SMBus Dual Port Operation ............................................................................................................................................................. 22
2.5 LTC1760 SMBus Controller Operation.............................................................................................................................................. 23
2.6 LTC1760 SMBALERT Operation........................................................................................................................................................ 26
3 Charging Algorithm Overview ............................................................................................................................................................. 26
3.1 Wake-Up Charging Initiation ............................................................................................................................................................ 26
3.2 Wake-Up Charging Termination ....................................................................................................................................................... 26
3.3 Wake-Up Charging Current and Voltage Limits ................................................................................................................................ 27
3.4 Controlled Charging Initiation .......................................................................................................................................................... 27
3.5 Controlled Charging Termination...................................................................................................................................................... 27
3.6 Controlled Charging Current Programming...................................................................................................................................... 28
3.6.1 Current Limits When Charging A Single Battery........................................................................................................................... 28
3.6.2 Current Limits When Charging Two Batteries (TURBO Mode Disabled) ....................................................................................... 28
3.6.3 Current Limits When Charging Two Batteries (TURBO Mode Enabled)......................................................................................... 29
3.7 Controlled Charging Voltage Programming...................................................................................................................................... 29
4 System Power Management Algorithm and Battery Calibration .......................................................................................................... 29
4.1 Turning Off System Power ............................................................................................................................................................... 29
4.2 Power-By Algorithm When No Battery is Being Calibrated ............................................................................................................... 29
4.3 Power-By Algorithm When a Battery is Being Calibrated.................................................................................................................. 30
4.4 Power-By Reporting ......................................................................................................................................................................... 30
5 Battery Calibration (Conditioning) ....................................................................................................................................................... 30
5.1 Selecting a Battery to be Calibrated.................................................................................................................................................. 30
5.2 Initiating Calibration of Selected Battery .......................................................................................................................................... 31
5.3 Terminating Calibration of Selected Battery...................................................................................................................................... 31
6 MODE Pin Operation ........................................................................................................................................................................... 31
6.1 Stand Alone Charge Indication ......................................................................................................................................................... 31
6.2 Hardware Charge Inhibit .................................................................................................................................................................. 32
6.3 Charging When SCL and SDA are Low............................................................................................................................................. 32
6.4 Charging With an SMBus Host......................................................................................................................................................... 32
7 Battery Charger Controller ................................................................................................................................................................. 32
7.1 Charge MUX Switches...................................................................................................................................................................... 33
7.2 Dual Charging .................................................................................................................................................................................. 33
8 PowerPath Controller ......................................................................................................................................................................... 33
8.1 Autonomous PowerPath Switching.................................................................................................................................................. 34
8.2 Short-Circuit Protection ................................................................................................................................................................... 34
8.3 Emergency Turn-Off ......................................................................................................................................................................... 34
8.4 Power-Up Strategy ........................................................................................................................................................................... 34
9 The Voltage DAC Block ...................................................................................................................................................................... 34
10 The Current DAC Block ........................................................................................................................................................................ 35
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