Datasheet ISL97801 (Intersil) - 3
| Fabricante | Intersil |
| Descripción | High Power LED Driver |
| Páginas / Página | 20 / 3 — Electrical Specifications. (Continued). PARAMETER. DESCRIPTION. … |
| Formato / tamaño de archivo | PDF / 1.3 Mb |
| Idioma del documento | Inglés |
Electrical Specifications. (Continued). PARAMETER. DESCRIPTION. CONDITIONS. MIN. TYP. MAX. UNIT
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ISL97801
Electrical Specifications
VBAT = VIN = 12V, VDC = 5V, TA = -40°C to +105°C unless otherwise specified.
(Continued) PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT
VLEVEL Light Control Voltage Linear Input Range Mode = 1, analog control of LED current 0.25 3 V FBUV FAULT Feedback Undervoltage Fault VLEVEL = 1V, EN/PWM = 3V 120 160 180 mV FBOV FAULT Feedback Overvoltage Fault VLEVEL = 1V, EN/PWM = 3V 220 250 280 mV fSW Switching Frequency 850 1000 1150 kHz fDIMMING Maximum Recommended PWM Mode = 1, modulation signal applied to 10 kHz Dimming Frequency EN/PWM tSWITCH Load Switch Transition Time CGATE = 2nF 100 ns RLSDRIVERL Load Switch Driver Impedance Low EN/PWM = 0 30 50 RLSDRIVERH Load Switch Driver Impedance High EN/PWM = 3V 30 50 tFAULT Fault Timer Period 40 50 58 ms tDELAY Start-up Delay Timed LX switching delay 0.85 1 1.17 ms VFAULTPUMP Fault Pin Charge Pump VBAT = VIN = 3V 6 V VBOOST Boost Mode Threshold BUCK/BOOSTN = GND 0.4VDC V VBUCK Buck Mode Threshold BUCK/BOOSTN = VDC 0.94VDC V VMODEL Mode Low Threshold MODE = GND 1/3VDC V VMODEH Mode High Threshold MODE = VDC 2/3VDC V enFAULT Input Level Applied to TMAX Pin to 0.9VDC V Enable Fault Protection disFAULT Input Level Applied to TMAX Pin to 0.96VDC V Disable Fault Protection enTEMP Input Level Applied to TEMP Pin to 0.5 V Enable Temperature Compensation disTEMP Input Level Applied to TEMP Pin to 0.08 V Disable Temperature Compensation TCOMPP VFB Positive Temperature VTEMP/VDC = 0.80 1.26 Compensation; VFB/VFBnom TCOMPN VFB Negative Temperature VTEMP/VDC = 0.20 0.74 Compensation; VFB/VFBnom TTRIP Internal Temperature Protection 135 °C Threshold THYS Internal Temperature Protection 25 °C Hysteresis VEN/PWML EN/PWM Pin Input Low Threshold 1.2 V VEN/PWMH EN/PWM Pin Input High Threshold 2.5 V VDCUVLO VDC Under Voltage Lockout 2.6 V Rschottky Internal Schottky Diode for Buck 15 23 .
TABLE 1. LIGHT OUTPUT CONTROL, VDC = 5.0V MODE TEMP OPERATING MODE
1 (VDC - 0.25) > V > 0.25V
Standard Mode
light level to PWM modulation of EN/PWM input; LED bias current determined by LEVEL voltage, nominal 1V Don’t Care V < 0.25V Disable temperature compensation 0 V < (VDC - 0.25)
Fixed Bias Mode
VFB level internally set to 0.4V, independent of VLEVEL FN6428 Rev 1.00 Page 3 of 20 April 2, 2007
Electrical Specifications
VBAT = VIN = 12V, VDC = 5V, TA = -40°C to +105°C unless otherwise specified.
(Continued) PARAMETER DESCRIPTION CONDITIONS MIN TYP MAX UNIT
VLEVEL Light Control Voltage Linear Input Range Mode = 1, analog control of LED current 0.25 3 V FBUV FAULT Feedback Undervoltage Fault VLEVEL = 1V, EN/PWM = 3V 120 160 180 mV FBOV FAULT Feedback Overvoltage Fault VLEVEL = 1V, EN/PWM = 3V 220 250 280 mV fSW Switching Frequency 850 1000 1150 kHz fDIMMING Maximum Recommended PWM Mode = 1, modulation signal applied to 10 kHz Dimming Frequency EN/PWM tSWITCH Load Switch Transition Time CGATE = 2nF 100 ns RLSDRIVERL Load Switch Driver Impedance Low EN/PWM = 0 30 50 RLSDRIVERH Load Switch Driver Impedance High EN/PWM = 3V 30 50 tFAULT Fault Timer Period 40 50 58 ms tDELAY Start-up Delay Timed LX switching delay 0.85 1 1.17 ms VFAULTPUMP Fault Pin Charge Pump VBAT = VIN = 3V 6 V VBOOST Boost Mode Threshold BUCK/BOOSTN = GND 0.4VDC V VBUCK Buck Mode Threshold BUCK/BOOSTN = VDC 0.94VDC V VMODEL Mode Low Threshold MODE = GND 1/3VDC V VMODEH Mode High Threshold MODE = VDC 2/3VDC V enFAULT Input Level Applied to TMAX Pin to 0.9VDC V Enable Fault Protection disFAULT Input Level Applied to TMAX Pin to 0.96VDC V Disable Fault Protection enTEMP Input Level Applied to TEMP Pin to 0.5 V Enable Temperature Compensation disTEMP Input Level Applied to TEMP Pin to 0.08 V Disable Temperature Compensation TCOMPP VFB Positive Temperature VTEMP/VDC = 0.80 1.26 Compensation; VFB/VFBnom TCOMPN VFB Negative Temperature VTEMP/VDC = 0.20 0.74 Compensation; VFB/VFBnom TTRIP Internal Temperature Protection 135 °C Threshold THYS Internal Temperature Protection 25 °C Hysteresis VEN/PWML EN/PWM Pin Input Low Threshold 1.2 V VEN/PWMH EN/PWM Pin Input High Threshold 2.5 V VDCUVLO VDC Under Voltage Lockout 2.6 V Rschottky Internal Schottky Diode for Buck 15 23 .
TABLE 1. LIGHT OUTPUT CONTROL, VDC = 5.0V MODE TEMP OPERATING MODE
1 (VDC - 0.25) > V > 0.25V
Standard Mode
light level to PWM modulation of EN/PWM input; LED bias current determined by LEVEL voltage, nominal 1V Don’t Care V < 0.25V Disable temperature compensation 0 V < (VDC - 0.25)
Fixed Bias Mode
VFB level internally set to 0.4V, independent of VLEVEL FN6428 Rev 1.00 Page 3 of 20 April 2, 2007