Datasheet LT8391 (Linear Technology) - 4
| Manufacturer | Linear Technology |
| Description | 60V Synchronous 4-Switch Buck-Boost LED Controller with Spread Spectrum |
| Pages / Page | 34 / 4 — The. denotes the specifications which apply over the full operating |
| Revision | A |
| File Format / Size | PDF / 466 Kb |
| Document Language | English |
The. denotes the specifications which apply over the full operating
Model Line for this Datasheet
Text Version of Document
LT8391 ELECTRICAL CHARACTERISTICS
The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 2). VIN = 12V, VEN/UVLO = 1.5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
RP Pin Current Limit VRP = 0V, Current out of Pin 40 µA Minimum VOUT for PWMTG to be On PWM dimming on 2.4 3 V PWMTG On Voltage V(VOUT-PWMTG) VOUT = 12V 4.6 5 5.4 V PWMTG Off Voltage V(VOUT-PWMTG) VOUT = 12V –0.1 0 0.1 V PWM to PWMTG Turn On Propagation Delay CPWMTG = 3.3nF to VOUT, 50% to 50% 90 ns PWM to PWMTG Turn Off Propagation Delay CPWMTG = 3.3nF to VOUT, 50% to 50% 40 ns PWMTG Turn On Fall Time CPWMTG = 3.3nF to VOUT, 10% to 90% 300 ns PWMTG Turn Off Rise Time CPWMTG = 3.3nF to VOUT, 90% to 10% 10 ns
Error Amplifier
Full Scale LED Current Regulation V(ISP-ISN) VCTRL1/2 ≥ 1.35V (Note 4), VISP = 12V l 97 100 103 mV VCTRL1/2 ≥ 1.35V (Note 4), VISP = 0V l 97 100 103 mV 9/10th LED Current Regulation V(ISP-ISN) VCTRL1/2 = 1.15V (Note 4), VISP = 12V l 87 90 93 mV VCTRL1/2 = 1.15V (Note 4), VISP = 0V l 87 90 93 mV 1/2 LED Current Regulation V(ISP-ISN) VCTRL1/2 = 0.75V (Note 4), VISP = 12V l 47.5 50 52.5 mV VCTRL1/2 = 0.75V (Note 4), VISP = 0V l 47.5 50 52.5 mV 1/20th LED Current Regulation V(ISP-ISN) VCTRL1/2 = 0.30V (Note 4), VISP = 12V l 3 5 7 mV VCTRL1/2 = 0.30V (Note 4), VISP = 0V l 3 5 7 mV Zero Scale LED Current Regulation V(ISP-ISN) VCTRL1/2 = 0.25V (Note 4), VISP = 12V l –2 0 2 mV VCTRL1/2 = 0.25V (Note 4), VISP = 0V l –2 0 2 mV ISP/ISN Input Common Mode Range l 0 60 V ISP/ISN Low Side to High Side Switchover VISP = VISN 1.8 V Voltage ISP/ISN High Side to Low Side Switchover VISP = VISN 1.7 V Voltage ISP Input Bias Current VPWM = 5V, VISP = VISN = 12V 23 µA VPWM = 5V, VISP = VISN = 0V –10 µA VEN/UVLO = 0V, VISP = VISN = 12V or 0V 0 µA ISN Input Bias Current VPWM = 5V, VISP = VISN = 12V 23 µA VPWM = 5V, VISP = VISN = 0V –10 µA VEN/UVLO = 0V, VISP = VISN = 12V or 0V 0 µA LED Current Regulation Amplifier gm 2000 µS FB Regulation Voltage VC = 1.2V l 0.98 1.00 1.02 V FB Line Regulation VIN = 4V to 60V 0.2 0.5 % FB Load Regulation 0.2 0.8 % FB Voltage Regulation Amplifier gm 660 µS FB Input Bias Current FB in Regulation, Current Out of Pin 10 40 nA VC Output Impedance 10 MΩ VC Standby Leakage Current VC = 1.2V, PWM Dimming Off –10 0 10 nA 8391fa 4 For more information www.linear.com/LT8391
The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 2). VIN = 12V, VEN/UVLO = 1.5V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
RP Pin Current Limit VRP = 0V, Current out of Pin 40 µA Minimum VOUT for PWMTG to be On PWM dimming on 2.4 3 V PWMTG On Voltage V(VOUT-PWMTG) VOUT = 12V 4.6 5 5.4 V PWMTG Off Voltage V(VOUT-PWMTG) VOUT = 12V –0.1 0 0.1 V PWM to PWMTG Turn On Propagation Delay CPWMTG = 3.3nF to VOUT, 50% to 50% 90 ns PWM to PWMTG Turn Off Propagation Delay CPWMTG = 3.3nF to VOUT, 50% to 50% 40 ns PWMTG Turn On Fall Time CPWMTG = 3.3nF to VOUT, 10% to 90% 300 ns PWMTG Turn Off Rise Time CPWMTG = 3.3nF to VOUT, 90% to 10% 10 ns
Error Amplifier
Full Scale LED Current Regulation V(ISP-ISN) VCTRL1/2 ≥ 1.35V (Note 4), VISP = 12V l 97 100 103 mV VCTRL1/2 ≥ 1.35V (Note 4), VISP = 0V l 97 100 103 mV 9/10th LED Current Regulation V(ISP-ISN) VCTRL1/2 = 1.15V (Note 4), VISP = 12V l 87 90 93 mV VCTRL1/2 = 1.15V (Note 4), VISP = 0V l 87 90 93 mV 1/2 LED Current Regulation V(ISP-ISN) VCTRL1/2 = 0.75V (Note 4), VISP = 12V l 47.5 50 52.5 mV VCTRL1/2 = 0.75V (Note 4), VISP = 0V l 47.5 50 52.5 mV 1/20th LED Current Regulation V(ISP-ISN) VCTRL1/2 = 0.30V (Note 4), VISP = 12V l 3 5 7 mV VCTRL1/2 = 0.30V (Note 4), VISP = 0V l 3 5 7 mV Zero Scale LED Current Regulation V(ISP-ISN) VCTRL1/2 = 0.25V (Note 4), VISP = 12V l –2 0 2 mV VCTRL1/2 = 0.25V (Note 4), VISP = 0V l –2 0 2 mV ISP/ISN Input Common Mode Range l 0 60 V ISP/ISN Low Side to High Side Switchover VISP = VISN 1.8 V Voltage ISP/ISN High Side to Low Side Switchover VISP = VISN 1.7 V Voltage ISP Input Bias Current VPWM = 5V, VISP = VISN = 12V 23 µA VPWM = 5V, VISP = VISN = 0V –10 µA VEN/UVLO = 0V, VISP = VISN = 12V or 0V 0 µA ISN Input Bias Current VPWM = 5V, VISP = VISN = 12V 23 µA VPWM = 5V, VISP = VISN = 0V –10 µA VEN/UVLO = 0V, VISP = VISN = 12V or 0V 0 µA LED Current Regulation Amplifier gm 2000 µS FB Regulation Voltage VC = 1.2V l 0.98 1.00 1.02 V FB Line Regulation VIN = 4V to 60V 0.2 0.5 % FB Load Regulation 0.2 0.8 % FB Voltage Regulation Amplifier gm 660 µS FB Input Bias Current FB in Regulation, Current Out of Pin 10 40 nA VC Output Impedance 10 MΩ VC Standby Leakage Current VC = 1.2V, PWM Dimming Off –10 0 10 nA 8391fa 4 For more information www.linear.com/LT8391
