Datasheet LT3596 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | 60V Step-Down LED Driver |
| Pages / Page | 22 / 3 — The. denotes the specifications which apply over the full operating |
| File Format / Size | PDF / 2.3 Mb |
| Document Language | English |
The. denotes the specifications which apply over the full operating
Model Line for this Datasheet
Text Version of Document
LT3596 e lecTrical characTerisTics
The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 24V, BOOST = 30V, BIAS = 5V, EN/UVLO = 5V, PWM1-3 = 3.3V, CTRL1-3 = CTRLM = TSET = 2V, VOUT = 24V, SYNC = 0V unless otherwise specified. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Voltage l 6 55 V Quiescent Current from VIN EN/UVLO = 0.4V 2 µA BIAS = 5V, Not Switching 1.3 4 mA BIAS = 0V, Not Switching 3 5 mA Minimum BIAS Voltage 3 3.1 V Quiescent Current from BIAS EN/UVLO = 0.4V 2 µA BIAS = 5V, Not Switching 1.4 3 mA BIAS = 0V, Not Switching, Current Out of Pin 70 150 µA EN Threshold 0.4 0.7 V UVLO Threshold (Falling) 1.47 1.51 1.53 V EN/UVLO Pin Current (Hysteresis) EN/UVLO = 1.6V 10 nA EN/UVLO = 1.4V 4.25 5.1 5.75 µA FB Regulation Voltage 1.15 1.21 1.25 V FB Pin Bias Current FB = 6V 200 nA Maximum Duty Cycle RT = 220k (200kHz) 90 99 % RT = 33.2k (1MHz) 80 90 % Switch Saturation Voltage ISW = 300mA 330 mV Switch Current Limit 0.8 1.0 1.25 A DA Pin Current to Stop OSC 500 650 750 mA Switch Leakage VSW = 0V 700 nA BOOST Pin Current ISW = 100mA 3 mA Switching Frequency RT = 220k 170 200 230 kHz RT = 33.2k 900 1000 1100 kHz SYNC Input Low 0.4 V SYNC Input High 1.6 V SYNC Frequency Range RT = 220k 240 kHz RT = 47k 1000 kHz SYNC Pin Bias Current VSYNC = 3.3V 200 nA Soft-Start Time (Note 4) 2.2 ms VREF Voltage IVREF = 0µA l 1.96 2.0 2.04 V Maximum VREF Current 200 µA ISET1-3 Pin Voltage RISET1-3 = 20k 1.0 V TSET Voltage for LED Current Derating 540 mV TSET Pin Leakage Current VTSET = 1V 200 nA ILED1-3 LED Current RISET1-3 = 20k 98 100 102 mA l 97 100 103 mA LED String Current Matching RISET1-3 = 20k ±0.35 ±1.5 % l ±0.35 ±2 % LED Pin Voltage Adaptive VOUT Loop Enabled 1.07 V LED1-3 Open Detection Threshold 0.29 V LED1-3 Short Protection Threshold (from GND) 10 15 V LED1-3 Short Protection Threshold (from VOUT) VOUT = 6V, VOUT > VLED1-3 1 1.2 1.6 V LED1-3 Pin Leakage Current VLED1-3 = 42V, PWM1-3 = 0V 200 nA 3596fa Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 24V, BOOST = 30V, BIAS = 5V, EN/UVLO = 5V, PWM1-3 = 3.3V, CTRL1-3 = CTRLM = TSET = 2V, VOUT = 24V, SYNC = 0V unless otherwise specified. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Voltage l 6 55 V Quiescent Current from VIN EN/UVLO = 0.4V 2 µA BIAS = 5V, Not Switching 1.3 4 mA BIAS = 0V, Not Switching 3 5 mA Minimum BIAS Voltage 3 3.1 V Quiescent Current from BIAS EN/UVLO = 0.4V 2 µA BIAS = 5V, Not Switching 1.4 3 mA BIAS = 0V, Not Switching, Current Out of Pin 70 150 µA EN Threshold 0.4 0.7 V UVLO Threshold (Falling) 1.47 1.51 1.53 V EN/UVLO Pin Current (Hysteresis) EN/UVLO = 1.6V 10 nA EN/UVLO = 1.4V 4.25 5.1 5.75 µA FB Regulation Voltage 1.15 1.21 1.25 V FB Pin Bias Current FB = 6V 200 nA Maximum Duty Cycle RT = 220k (200kHz) 90 99 % RT = 33.2k (1MHz) 80 90 % Switch Saturation Voltage ISW = 300mA 330 mV Switch Current Limit 0.8 1.0 1.25 A DA Pin Current to Stop OSC 500 650 750 mA Switch Leakage VSW = 0V 700 nA BOOST Pin Current ISW = 100mA 3 mA Switching Frequency RT = 220k 170 200 230 kHz RT = 33.2k 900 1000 1100 kHz SYNC Input Low 0.4 V SYNC Input High 1.6 V SYNC Frequency Range RT = 220k 240 kHz RT = 47k 1000 kHz SYNC Pin Bias Current VSYNC = 3.3V 200 nA Soft-Start Time (Note 4) 2.2 ms VREF Voltage IVREF = 0µA l 1.96 2.0 2.04 V Maximum VREF Current 200 µA ISET1-3 Pin Voltage RISET1-3 = 20k 1.0 V TSET Voltage for LED Current Derating 540 mV TSET Pin Leakage Current VTSET = 1V 200 nA ILED1-3 LED Current RISET1-3 = 20k 98 100 102 mA l 97 100 103 mA LED String Current Matching RISET1-3 = 20k ±0.35 ±1.5 % l ±0.35 ±2 % LED Pin Voltage Adaptive VOUT Loop Enabled 1.07 V LED1-3 Open Detection Threshold 0.29 V LED1-3 Short Protection Threshold (from GND) 10 15 V LED1-3 Short Protection Threshold (from VOUT) VOUT = 6V, VOUT > VLED1-3 1 1.2 1.6 V LED1-3 Pin Leakage Current VLED1-3 = 42V, PWM1-3 = 0V 200 nA 3596fa Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts
