Datasheet LT3596 (Analog Devices) - 6

LT3596 Typical perForMance characTerisTics
TA = 25°C, unless otherwise noted Boost Diode Voltage Soft-Start 60V Buck Switching Waveforms
1.0 EN/UVLO 0.8 5V/DIV SW SW 20V/DIV 0.6 50V/DIV IL I 500mA/DIV L 0.4 500mA/DIV VOUT VOUT 20V/DIV BOOST DIODE VOLTAGE (V) 20V/DIV 0.2 400µs/DIV 3596 G11 400ns/DIV 3596 G12 0 0 25 50 75 100 125 150 175 CURRENT (mA) 3596 G10
FB and LED Loop Regulation Voltage LED Current LED Current Matching
1.4 103 1.00 RISETn = 20k RISETn = 20k 0.75 1.3 102 0.50 VFB 101 1.2 0.25 100 0 1.1 VLED MATCHING (%) –0.25 LED CURRENT (mA) 99 REGULATION VOLTAGE (V) –0.50 1.0 98 LED1 CH1 LED2 –0.75 CH2 LED3 CH3 0.9 97 –1.00 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3596 G13 3596 G14 3596 G15
Adaptive Loop Switching LED Current vs PWM Duty Cycle LED Current vs CTRLn Voltage Waveforms (with PWM Dimming)
100 100 RISETn = 20k RISETn = 20k ILED 10 100mA/DIV 75 1 VOUT 10V/DIV 0.1 50 VLED 10V/DIV LED CURRENT (mA) 0.01 LED CURRENT (mA) 25 VSW 100V/DIV 0.001 200µs/DIV 3596 G18 0.0001 0 0.001 0.01 0.1 1 10 100 0 0.25 0.5 0.75 1 1.25 1.5 PWM DUTY CYCLE (%) CTRLn VOLTAGE (V) 3596 G16 3596 G17 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