LT3595 LINER [Linear Technology], LT3595 Datasheet
LT3595
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LT3595 Summary of contents
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... SW6 SW7 L7 SW8 LT3595 SW13 L13 L12 SW12 L11 SW11 V SW10 L10 SW9 IN 0.47μF 0.47μF 0.47μF 0.47μF 0.47μF LT3595 16 Channel Buck Mode LED Driver 5000:1 PWM Dimming at 100Hz 0.47μF V PWM 5V/DIV I SW 20mA/DIV L8 PWM9 PWM10 I LED PWM11 LED 10mA/DIV PWM12 BRIGHT- ...
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... ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LT3595EUHH#PBF LT3595EUHH#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: For more information on tape and reel specifi ...
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... O ⎯ P ⎯ E ⎯ N ⎯ L ⎯ E ⎯ ⎯ O ⎯ P ⎯ E ⎯ N ⎯ L ⎯ E ⎯ 3.3V Note 2: The LT3595 is guaranteed to meet performance specifi cations from 0°C to 85°C junction temperature. Specifi cations over the –40°C to 85°C operating junction temperature range are assured by design, characterization and correlation with statistical process controls ...
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... LT3595 TYPICAL PERFORMANCE CHARACTERISTICS Switching Waveforms 10 LEDS V SW1 50V/DIV 10 LEDS I L1 50mA/DIV 5 LEDS V SW2 50V/DIV 5 LEDS I L2 50mA/DIV 3595 G01 400ns/DIV V = 45V 20mA LED LED Current vs PWM Duty Cycle Wide Dimming Range (5000:1) 100 V = 45V IN 10 LEDS AT 20mA PWM FREQUENCY = 100Hz ...
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... O ⎯ P ⎯ E ⎯ N ⎯ L ⎯ E ⎯ D Waveforms I LED CH 1 20mA/DIV OPENLED 5V/DIV 50V/DIV I LED CH 2 20mA/DIV 3595 G14 LEDS AT 20mA LT3595 Schottky Leakage Current vs Temperature 1.4 1.2 1.0 0 0.2 0 100 125 –50 – TEMPERATURE (°C) 3595 G10 T = 125° ...
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... LT3595 PIN FUNCTIONS L1-16 (Pins 10, 12, 16, 18, 29, 31, 35, 37, 38, 40, 44, 46): LED Pins. Connection point for the anode of the highest LED in each string. SW1-16 (Pins 11, 13, 15, 17, 30, 32, 34, 36, 39, 41, 43, 45): Switch Pins. Minimize trace area at these pins to minimize EMI. Connect the inductors to these pins ...
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... V CC VREG REG 3.3V 10μF SHDN 24 REF R SET 51 R SET V PWM1-16 IN DFC CONTROL 1 CHANNEL 16X V/I – PWM + S + Σ ISNS – RAMP GENERATOR 2MHz CONTROL OSCILLATOR LT3595 10μF L1-16 C OUT1-16 0.47μF SW1-16 L 1-16 100μH GND 57 OPENLED 23 3595 3595f ...
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... PWM comparators and dimming control (DFC) are identical for all converters. The LT3595 enters shutdown mode when the ⎯ S ⎯ H ⎯ D ⎯ N pin is lower than 400mV. If the ⎯ S ⎯ H ⎯ D ⎯ N pin is above 1.6V, then the LT3595 turns on. At the start of each oscillator cycle, the power switch is turned on ...
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... OPERATION Discontinuous Current Mode The LT3595 can drive a 10-LED string at 15mA LED cur- rent operating in continuous conduction mode using the recommended external components shown in the ap- plication circuit on page 1 of this data sheet. As current is further reduced, the regulator enters discontinuous conduction mode. The photo in Figure 1 details circuit operation driving ten LEDs at 10mA load ...
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... Open LED Detection The LT3595 detects an open LED on any channel and reports it to the ⎯ O ⎯ P ⎯ E ⎯ N ⎯ L ⎯ E ⎯ D pin. The fault also reports dur- ing startup until the output voltage and LED current are = 3 ...
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... Since the maximum R modulated LED current is 2μA. When multiple channels are modulated, the rising edges of PWM1-16 must be synchronized. The falling edges may be asynchronous. A sample timing diagram is shown in Figure 3. = 2μ 10ms MAX LT3595 produces 10mA, the minimum SET 3595 F03 3595f 11 ...
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... LT3595 APPLICATIONS INFORMATION Board Layout Considerations As with all switching regulators, careful attention must be paid to the PCB board layout and component placement. To prevent electromagnetic interference (EMI) problems, proper layout of high frequency switching paths is essential. Minimize the length and area of all traces connected to 12 the SW1-16 and PWM1-16 pins ...
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... APPLICATIONS INFORMATION Figure 6. PCB Layer 3 Figure 7. PCB Layer 4 LT3595 3595f 13 ...
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... Conversion Effi ciency 100 (mA) LED 14 0.47μF 0.47μF 0.47μF SW3 L3 SW4 L4 L5 SW5 L6 LT3595 SW14 L14 SW13 L13 L12 SW12 L11 IN 0.47μF 0.47μF 0.47μ 3595 TA02b 0.47μF 0.47μF 0.47μF SW6 SW7 L7 SW8 L8 PWM9 PWM10 ...
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... DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.20mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE LT3595 0.70 ± 0.05 PACKAGE OUTLINE PIN 1 NOTCH R = 0.30 TYP OR 0.35 × ...
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... Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● 0.47μF 0.47μF 0.47μF 0.47μF SW4 L4 L5 SW5 L6 SW6 SW7 L7 SW8 LT3595 SW13 L13 L12 SW12 L11 SW11 V SW10 L10 SW9 IN 0.47μF 0.47μF 0.47μF 0.47μF COMMENTS , Constant Off-Time, High ...