Datasheet LT8710 (Analog Devices) - 5
| Hersteller | Analog Devices |
| Beschreibung | Synchronous SEPIC/Inverting/Boost Controller with Output Current Control |
| Seiten / Seite | 44 / 5 — e lecTrical characTerisTics The. denotes the specifications which apply … |
| Dateiformat / Größe | PDF / 657 Kb |
| Dokumentensprache | Englisch |
e lecTrical characTerisTics The. denotes the specifications which apply over the full operating
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LT8710
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications for each channel are at TA = 25°C. VIN = 12V, VEN/FBIN = 12V, VBIAS = 12V, unless otherwise noted (Note 2). PARAMETER CONDITIONS MIN TYP MAX UNITS Gate Drivers, BG and TG
BG Rise Time CBG = 3300pF (Note 3) 24 ns BG Fall Time CBG = 3300pF (Note 3) 21 ns TG Rise Time CTG = 3300pF (Note 3) 15 ns TG Fall Time CTG = 3300pF (Note 3) 16 ns BG and TG Non-Overlap Time TG Rising to BG Rising, CBG = CTG = 3300pF (Note 3) 80 140 220 ns BG Falling to TG Falling, CBG = CTG = 3300pF (Note 3) 45 90 150 ns BG Minimum On-Time CBG = CTG = 3300pF 150 420 ns BG Minimum Off-Time CBG = CTG = 3300pF 100 480 ns TG Minimum On-Time CBG = CTG = 3300pF 0 150 ns TG Minimum Off-Time CBG = CTG = 3300pF 290 770 ns
C/10 and Power Good Indicators, FLAG
FLAG C/10 Indicator Threshold VISP – VISN Falling, VFBX = 1.215V l 1 5 16 mV VISP – VISN Rising, VFBX = 1.215V l 4 10 23 mV FLAG C/10 Indicator Hysteresis 5 mV FLAG Power Good Threshold for VFBX Rising, VISP – VISN = 0V l 1.127 1.153 1.184 V Positive FBX Voltage VFBX Falling, VISP – VISN = 0V l 1.062 1.095 1.126 V FLAG Power Good Threshold for VFBX Falling, VISP – VISN = 0V l 46 68.5 90 mV Negative FBX Voltage VFBX Rising, VISP – VISN = 0V l 103 126 152 mV FLAG Power Good Hysteresis for 58 mV Positive or Negative FBX Voltage FLAG Anti-Glitch Delay from C/10 or Power Good Threshold Trip to FLAG Toggle 100 µs FLAG Output Voltage Low 100µA into FLAG Pin l 9 50 mV FLAG Leakage Current VFLAG = 7V, FLAG Off 0.01 1 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
Rise and fall times are measured using 10% and 90% levels. Delay may cause permanent damage to the device. Exposure to any Absolute times are measured using 50% levels. Maximum Rating condition for extended periods may affect device
Note 4:
This IC includes overtemperature protection that is intended reliability and lifetime. to protect the device during momentary overload conditions. Junction
Note 2:
The LT8710E is guaranteed to meet performance specifications temperature will exceed 125°C when overtemperature protection is active. from 0°C to 125°C junction temperature. Specifications over the Continuous operation over the specified maximum operating junction –40°C to 125°C operating temperature range are assured by design, temperature may impair device reliability. characterization and correlation with statistical process controls. The
Note 5
: Do not apply a positive or negative voltage or current source to the LT8710I is guaranteed over the full –40°C to 125°C operating junction BG, TG, and INTVEE pins, otherwise permanent damage may occur. temperature range. 8710f For more information www.linear.com/LT8710 5
e lecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications for each channel are at TA = 25°C. VIN = 12V, VEN/FBIN = 12V, VBIAS = 12V, unless otherwise noted (Note 2). PARAMETER CONDITIONS MIN TYP MAX UNITS Gate Drivers, BG and TG
BG Rise Time CBG = 3300pF (Note 3) 24 ns BG Fall Time CBG = 3300pF (Note 3) 21 ns TG Rise Time CTG = 3300pF (Note 3) 15 ns TG Fall Time CTG = 3300pF (Note 3) 16 ns BG and TG Non-Overlap Time TG Rising to BG Rising, CBG = CTG = 3300pF (Note 3) 80 140 220 ns BG Falling to TG Falling, CBG = CTG = 3300pF (Note 3) 45 90 150 ns BG Minimum On-Time CBG = CTG = 3300pF 150 420 ns BG Minimum Off-Time CBG = CTG = 3300pF 100 480 ns TG Minimum On-Time CBG = CTG = 3300pF 0 150 ns TG Minimum Off-Time CBG = CTG = 3300pF 290 770 ns
C/10 and Power Good Indicators, FLAG
FLAG C/10 Indicator Threshold VISP – VISN Falling, VFBX = 1.215V l 1 5 16 mV VISP – VISN Rising, VFBX = 1.215V l 4 10 23 mV FLAG C/10 Indicator Hysteresis 5 mV FLAG Power Good Threshold for VFBX Rising, VISP – VISN = 0V l 1.127 1.153 1.184 V Positive FBX Voltage VFBX Falling, VISP – VISN = 0V l 1.062 1.095 1.126 V FLAG Power Good Threshold for VFBX Falling, VISP – VISN = 0V l 46 68.5 90 mV Negative FBX Voltage VFBX Rising, VISP – VISN = 0V l 103 126 152 mV FLAG Power Good Hysteresis for 58 mV Positive or Negative FBX Voltage FLAG Anti-Glitch Delay from C/10 or Power Good Threshold Trip to FLAG Toggle 100 µs FLAG Output Voltage Low 100µA into FLAG Pin l 9 50 mV FLAG Leakage Current VFLAG = 7V, FLAG Off 0.01 1 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
Rise and fall times are measured using 10% and 90% levels. Delay may cause permanent damage to the device. Exposure to any Absolute times are measured using 50% levels. Maximum Rating condition for extended periods may affect device
Note 4:
This IC includes overtemperature protection that is intended reliability and lifetime. to protect the device during momentary overload conditions. Junction
Note 2:
The LT8710E is guaranteed to meet performance specifications temperature will exceed 125°C when overtemperature protection is active. from 0°C to 125°C junction temperature. Specifications over the Continuous operation over the specified maximum operating junction –40°C to 125°C operating temperature range are assured by design, temperature may impair device reliability. characterization and correlation with statistical process controls. The
Note 5
: Do not apply a positive or negative voltage or current source to the LT8710I is guaranteed over the full –40°C to 125°C operating junction BG, TG, and INTVEE pins, otherwise permanent damage may occur. temperature range. 8710f For more information www.linear.com/LT8710 5