LM3405XEVAL National Semiconductor, LM3405XEVAL Datasheet
LM3405XEVAL
Specifications of LM3405XEVAL
Related parts for LM3405XEVAL
LM3405XEVAL Summary of contents
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... Additional features include user accessible EN/DIM pin for enabling and PWM dimming of LEDs, thermal shutdown, cycle-by-cycle current limit and over-current protection. Typical Application Circuit © 2007 National Semiconductor Corporation Features ■ V operating range 15V IN ■ ...
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Connection Diagrams 6-Lead TSOT NS Package Number MK06A Ordering Information Part Number Package Type LM3405XMK TSOT-6 LM3405XMKX *NOPB versions are available Pin Descriptions Pin(s) Name 1 BOOST 2 GND EN/DIM www.national.com 20178905 ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications Voltage Boost Voltage Boost to SW Voltage FB Voltage EN/DIM Voltage Junction Temperature Electrical Characteristics limits in boldface type apply over the junction temperature (T guaranteed through test, design, or statistical correlation ...
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Typical Performance Characteristics T = 25°C. A Efficiency vs LED Current Efficiency vs Input Voltage ( Temperature FB www.national.com Unless otherwise specified, V Efficiency vs Input Voltage (I 20178973 = 0.7A) Efficiency vs Input Voltage (I F 20178932 ...
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Current Limit vs Temperature 20178972 Quiescent Current vs Temperature 20178934 R vs Temperature (V DS(ON) BOOST Startup Response to EN/DIM Signal (V = 15V 0.2A 3V) SW 20178930 20178968 www.national.com ...
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Block Diagram Application Information THEORY OF OPERATION The LM3405 is a PWM, current-mode control switching buck regulator designed to provide a simple, high efficiency solu- tion for driving LEDs with a preset switching frequency of 1.6MHz. This high frequency allows ...
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When the LM3405 starts up, internal circuitry from V plies a 20mA current to the BOOST pin, flowing out of the BOOST pin into C3. This current charges voltage suf- ficient to turn the switch on. The ...
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The fourth method can be used in an application which has an external low voltage rail can be charged through EXT D2 from V , independent of V EXT IN Again for best performance, ensure that the ...
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FIGURE 9. Startup Response to V with 200µs rise time IN LED PWM DIMMING The LED brightness can be controlled by applying a periodic pulse signal to the EN/DIM pin and varying its frequency and/ or duty cycle. This so-called ...
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LED current. LED current overshoot is limited to 328mV/R1 by this comparator during transients. THERMAL SHUTDOWN Thermal shutdown limits total power dissipation by turning off the internal power switch when the IC junction ...
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ESL and a 0805 ceramic chip capac- itor will have very low ESL. At the operating frequency of the LM3405, certain capacitors may have an ESL so large that the resulting inductive impedance (2πfL) will be ...
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BOOST CAPACITOR (C3) A 0.01µF ceramic capacitor with a voltage rating of at least 6.3V is sufficient. The X7R and X5R MLCCs provide the best performance. POWER LOSS ESTIMATION The main power loss in LM3405 includes three basic types of ...
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... R1 LED1 1A, White LED FIGURE 15. V derived from V BOOST 5V Bill of Materials for Figure 15 Part Number LM3405 C3216X5R0J106M GRM319R71A105KC01D 0805YC103KAT2A GRM319R71A105KC01D = 10V MBRM110LT1G R CMDSH-3 SLF6028T-4R7M1R6 WSL2010R2000FEA LXHL-PW09 13 20178942 Manufacturer National Semiconductor TDK Murata AVX Murata ON Semiconductor Central Semiconductor TDK Vishay Lumileds www.national.com ...
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... White LED www.national.com FIGURE 16. V derived from V BOOST OUT ( V = 12V Bill of Materials for Figure 16 Part Number LM3405 ECJ-3YB1E106K GRM319R71A105KC01D 0805YC103KAT2A GRM319R71A105KC01D = 30V SS13 R CMDSH-3 SLF6028T-4R7M1R6 WSL2010R2000FEA LXHL-PW09 14 20178943 Manufacturer National Semiconductor Panasonic Murata AVX Murata Vishay Central Semiconductor TDK Vishay Lumileds ...
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... Shunt Zener Diode (D3) BOOST 15V Bill of Materials for Figure 17 Part Number LM3405 ECJ-3YB1E106K GRM319R71A105KC01D 0805YC103KAT2A GRM319R71A105KC01D GRM219R71C104KA01D = 30V SS13 R CMDSH-3 BZX84C4V7 SLF6028T-6R8M1R5 WSL2010R2000FEA CRCW08051K91FKEA LXHL-PW09 15 20178944 Manufacturer National Semiconductor Panasonic Murata AVX Murata Murata Vishay Central Semiconductor Fairchild TDK Vishay Vishay Lumileds www.national.com ...
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... V through a Series Zener Diode (D3) BOOST 15V Bill of Materials for Figure 18 Part Number LM3405 ECJ-3YB1E106K GRM319R71A105KC01D 0805YC103KAT2A GRM319R71A105KC01D = 30V SS13 R CMDSH-3 BZX84C11 SLF6028T-6R8M1R5 WSL2010R2000FEA LXHL-PW09 16 20178949 Manufacturer National Semiconductor Panasonic Murata AVX Murata Vishay Central Semiconductor Fairchild TDK Vishay Lumileds ...
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... Series Zener Diode (D3) BOOST OUT ( V = 15V Bill of Materials for Figure 19 Part Number LM3405 ECJ-3YB1E106K GRM319R71A105KC01D 0805YC103KAT2A GRM319R71A105KC01D = 30V SS13 R CMDSH-3 BZX84C3V9 SLF6028T-6R8M1R5 WSL2010R2000FEA LXHL-PW09 LXHL-PW09 17 20178950 Manufacturer National Semiconductor Panasonic Murata AVX Murata Vishay Central Semiconductor Fairchild TDK Vishay Lumileds Lumileds www.national.com ...
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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 6-Lead TSOT Package NS Package Number MK06A 18 ...
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Notes 19 www.national.com ...
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