Datasheet LT8490 (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | High Voltage, High Current Buck-Boost Battery Charge Controller with Maximum Power Point Tracking (MPPT) |
| Pages / Page | 42 / 4 — elecTrical characTerisTics. The. denotes the specifications which apply … |
| File Format / Size | PDF / 707 Kb |
| Document Language | English |
elecTrical characTerisTics. The. denotes the specifications which apply over the full operating
Model Line for this Datasheet
Text Version of Document
LT8490
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VDD = AVDD = 3.3V, SHDN = 3V unless otherwise noted. (Note 3) PARAMETER CONDITIONS MIN TYP MAX UNITS Switching Regulator Oscillator (OSC1)
Switch Frequency Range Syncing or Free Running 100 400 kHz Switching Frequency, fOSC RT = 365k l 102 120 142 kHz RT = 215k l 170 202 235 kHz RT = 124k l 310 350 400 kHz SYNC High Level for Synchronization l 1.3 V SYNC Low Level for Synchronization l 0.5 V SYNC Clock Pulse Duty Cycle VSYNC = 0V to 2V 20 80 % Recommended Min SYNC Ratio, fSYNC/ fOSC 3/4 CLKOUT Output Voltage HIGH 1mA Out of CLKOUT Pin 2.3 2.45 2.55 V CLKOUT Output Voltage LOW 1mA into CLKOUT Pin 25 100 mV CLKOUT Duty Cycle TJ = –40°C 22.7 % TJ = 25°C 44.1 % TJ = 125°C 77 %
Charging Control
STATUS, FBOW, FBIW, SWENO, IOW, IOL = 5mA l 0.22 0.5 V ECON Output Low Voltage STATUS, FBOW, FBIW, SWENO, IOW, IOH = –5mA l 2.7 3.0 V ECON Output High Voltage FAULT Output Voltage Low IOL = 0.5mA l 0.1 0.25 V FAULT Output Voltage High IOH = –0.1mA l 1.7 2.2 V Power Supply Mode Detection Threshold (Note 6) VINR Pin Falling l 155 174 mV Power Supply Mode Detection Threshold Hysteresis (Note 6) VINR Pin 29 mV Minimum VINR Voltage for Start-Up (Note 6) Not in Power Supply Mode Low Power Mode Enabled l 380 395 410 mV Low Power Mode Disabled l 213 225 237 mV High Charging Current Threshold on IOR (Note 6) IOR Rising g ECON Rising l 168 195 224 mV Low Charging Current Threshold on IOR (Note 6) IOR Falling g ECON Falling l 95 122 150 mV Minimum CHARGECFG1 % of AVDD to Disable Stage 3 Temperature Compensation Enabled l 94 95 96 % (Note 6) Maximum CHARGECFG1 % of AVDD to Disable Stage 3 Temperature Compensation Disabled l 4 5 6 % (Note 6) Minimum CHARGECFG2 % of AVDD to Disable Time Limits Wide Valid Temperature Range l 94 95 96 % (Note 6) Maximum CHARGECFG2 % of AVDD to Disable Time Limits Narrow Valid Temperature Range l 4 5 6 % (Note 6) Minimum TEMPSENSE % of AVDD to Detect Battery Disconnected l 94.5 96 97.5 % (Note 6) VCSPOUT – VCSNOUT Threshold for C/5 Detection (Note 6) VCSxOUT Common Mode = 5.0V, RTOTAL from 9 10 11 mV IMON_OUT to Ground = 24.3kΩ VCSPOUT – VCSNOUT Threshold for C/10 Detection (Note 6) VCSxOUT Common Mode = 5.0V, IOR Falling, 4.25 5 5.75 mV RTOTAL from IMON_OUT to Ground = 24.3kΩ FBIW, FBOW PWM Frequency (OSC2) 31.25 kHz FBIW, FBOW PWM Resolution 8 Bits STATUS UART Bit Rate l 2160 2400 2640 Baud Internal A/D Resolution 10 Bits 8490fa 4 For more information www.linear.com/LT8490 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VDD = AVDD = 3.3V, SHDN = 3V unless otherwise noted. (Note 3) PARAMETER CONDITIONS MIN TYP MAX UNITS Switching Regulator Oscillator (OSC1)
Switch Frequency Range Syncing or Free Running 100 400 kHz Switching Frequency, fOSC RT = 365k l 102 120 142 kHz RT = 215k l 170 202 235 kHz RT = 124k l 310 350 400 kHz SYNC High Level for Synchronization l 1.3 V SYNC Low Level for Synchronization l 0.5 V SYNC Clock Pulse Duty Cycle VSYNC = 0V to 2V 20 80 % Recommended Min SYNC Ratio, fSYNC/ fOSC 3/4 CLKOUT Output Voltage HIGH 1mA Out of CLKOUT Pin 2.3 2.45 2.55 V CLKOUT Output Voltage LOW 1mA into CLKOUT Pin 25 100 mV CLKOUT Duty Cycle TJ = –40°C 22.7 % TJ = 25°C 44.1 % TJ = 125°C 77 %
Charging Control
STATUS, FBOW, FBIW, SWENO, IOW, IOL = 5mA l 0.22 0.5 V ECON Output Low Voltage STATUS, FBOW, FBIW, SWENO, IOW, IOH = –5mA l 2.7 3.0 V ECON Output High Voltage FAULT Output Voltage Low IOL = 0.5mA l 0.1 0.25 V FAULT Output Voltage High IOH = –0.1mA l 1.7 2.2 V Power Supply Mode Detection Threshold (Note 6) VINR Pin Falling l 155 174 mV Power Supply Mode Detection Threshold Hysteresis (Note 6) VINR Pin 29 mV Minimum VINR Voltage for Start-Up (Note 6) Not in Power Supply Mode Low Power Mode Enabled l 380 395 410 mV Low Power Mode Disabled l 213 225 237 mV High Charging Current Threshold on IOR (Note 6) IOR Rising g ECON Rising l 168 195 224 mV Low Charging Current Threshold on IOR (Note 6) IOR Falling g ECON Falling l 95 122 150 mV Minimum CHARGECFG1 % of AVDD to Disable Stage 3 Temperature Compensation Enabled l 94 95 96 % (Note 6) Maximum CHARGECFG1 % of AVDD to Disable Stage 3 Temperature Compensation Disabled l 4 5 6 % (Note 6) Minimum CHARGECFG2 % of AVDD to Disable Time Limits Wide Valid Temperature Range l 94 95 96 % (Note 6) Maximum CHARGECFG2 % of AVDD to Disable Time Limits Narrow Valid Temperature Range l 4 5 6 % (Note 6) Minimum TEMPSENSE % of AVDD to Detect Battery Disconnected l 94.5 96 97.5 % (Note 6) VCSPOUT – VCSNOUT Threshold for C/5 Detection (Note 6) VCSxOUT Common Mode = 5.0V, RTOTAL from 9 10 11 mV IMON_OUT to Ground = 24.3kΩ VCSPOUT – VCSNOUT Threshold for C/10 Detection (Note 6) VCSxOUT Common Mode = 5.0V, IOR Falling, 4.25 5 5.75 mV RTOTAL from IMON_OUT to Ground = 24.3kΩ FBIW, FBOW PWM Frequency (OSC2) 31.25 kHz FBIW, FBOW PWM Resolution 8 Bits STATUS UART Bit Rate l 2160 2400 2640 Baud Internal A/D Resolution 10 Bits 8490fa 4 For more information www.linear.com/LT8490 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
