Datasheet LT8391 (Linear Technology) - 9
| Manufacturer | Linear Technology |
| Description | 60V Synchronous 4-Switch Buck-Boost LED Controller with Spread Spectrum |
| Pages / Page | 34 / 9 — TA = 25°C, unless otherwise noted. V(ISP-ISN) Regulation. V(ISP-ISN) … |
| Revision | A |
| File Format / Size | PDF / 466 Kb |
| Document Language | English |
TA = 25°C, unless otherwise noted. V(ISP-ISN) Regulation. V(ISP-ISN) Regulation vs VCTRL. V(ISP-ISN) Regulation vs VISP
Model Line for this Datasheet
Text Version of Document
LT8391 TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise noted. V(ISP-ISN) Regulation V(ISP-ISN) Regulation vs VCTRL V(ISP-ISN) Regulation vs VISP vs Temperature
125 106 106 100 104 104 102 102 75 (mV) (mV) (mV) 100 100 50 V (ISP-ISN) V (ISP-ISN) 98 V (ISP-ISN) 98 25 96 96 ISP = 0V ISP = 12V ISP = 60V 0 94 94 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 0 10 20 30 40 50 60 –50 –25 0 25 50 75 100 125 150 VCTRL (V) VISP (V) TEMPERATURE (°C) 8391 G19 8391 G20 8391 G21
Maximum Current Sense V(ISP-ISN) Regulation vs VFB FB Regulation vs Temperature vs Temperature
120 1.03 70 65 100 1.02 60 80 1.01 (mV) 55 (mV) 60 (V) 1.00 50 V FB V (ISP-ISN) 45 40 0.99 CURRENT LIMIT 40 20 0.98 VIN = 4V VIN = 12V 35 BUCK VIN = 60V BOOST 0 0.97 30 0.96 0.97 0.98 0.99 1.00 1.01 1.02 1.03 1.04 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 VFB (V) TEMPERATURE (°C) TEMPERATURE (°C) 8391 G22 8391 G23 8391 G24
FB Overvoltage Threshold FB Open LED Threshold FB Short LED Threshold
1.10 1.10 0.40 RISING 1.05 1.05 0.35 RISING 1.00 FALLING 1.00 0.30 RISING FALLING (V) (V) 0.95 (V) 0.95 0.25 V FB V FB V FB FALLING 0.90 0.90 0.20 0.85 0.85 0.15 0.80 0.80 0.10 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8391 G25 8391 G26 8391 G27 8391fa For more information www.linear.com/LT8391 9
TA = 25°C, unless otherwise noted. V(ISP-ISN) Regulation V(ISP-ISN) Regulation vs VCTRL V(ISP-ISN) Regulation vs VISP vs Temperature
125 106 106 100 104 104 102 102 75 (mV) (mV) (mV) 100 100 50 V (ISP-ISN) V (ISP-ISN) 98 V (ISP-ISN) 98 25 96 96 ISP = 0V ISP = 12V ISP = 60V 0 94 94 0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 0 10 20 30 40 50 60 –50 –25 0 25 50 75 100 125 150 VCTRL (V) VISP (V) TEMPERATURE (°C) 8391 G19 8391 G20 8391 G21
Maximum Current Sense V(ISP-ISN) Regulation vs VFB FB Regulation vs Temperature vs Temperature
120 1.03 70 65 100 1.02 60 80 1.01 (mV) 55 (mV) 60 (V) 1.00 50 V FB V (ISP-ISN) 45 40 0.99 CURRENT LIMIT 40 20 0.98 VIN = 4V VIN = 12V 35 BUCK VIN = 60V BOOST 0 0.97 30 0.96 0.97 0.98 0.99 1.00 1.01 1.02 1.03 1.04 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 VFB (V) TEMPERATURE (°C) TEMPERATURE (°C) 8391 G22 8391 G23 8391 G24
FB Overvoltage Threshold FB Open LED Threshold FB Short LED Threshold
1.10 1.10 0.40 RISING 1.05 1.05 0.35 RISING 1.00 FALLING 1.00 0.30 RISING FALLING (V) (V) 0.95 (V) 0.95 0.25 V FB V FB V FB FALLING 0.90 0.90 0.20 0.85 0.85 0.15 0.80 0.80 0.10 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8391 G25 8391 G26 8391 G27 8391fa For more information www.linear.com/LT8391 9
