LP5526TLEV National Semiconductor, LP5526TLEV Datasheet
LP5526TLEV
Specifications of LP5526TLEV
Related parts for LP5526TLEV
LP5526TLEV Summary of contents
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... The device is controlled through 2-wire low voltage I patible interface that reduces the number of required connec- tions. Typical Application © 2009 National Semiconductor Corporation LP5526 Features ■ High efficiency boost converter with programmable output voltage up to 20V ■ ...
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Connection Diagrams Top View www.national.com 25-Bump Thin Micro SMD Package, Large Bump NS Package Number TLA25CCA 20179771 2 20179701 20179772 Bottom View ...
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Pin Descriptions Pin # Name Type 5E SW Output 5D FB Input 5C RLED Output 5B GLED Output 5A BLED Output 4E GND_SW Ground 4D NRST Input 4C SCL Logic Input 4B IRGB Input 4A GND_RGB Ground 3E VDD2 Power ...
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... J Note 4: For detailed soldering specifications and information, please refer to National Semiconductor Application Note AN1112 : Micro SMD Wafer Level Chip Scale Package Note 5: The Human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. The machine model is a 200pF capacitor discharged directly into each pin ...
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Block Diagram 5 20179774 www.national.com ...
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Modes of Operation RESET: In the RESET mode all the internal registers are reset to the default values. Reset is entered always if input NRST is LOW or internal Power On Reset is active. Power On Reset (POR) will activate ...
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Power-Up Sequence When powering up the device, V DD1 greater than V to prevent any damage to the device. DDIO Magnetic Boost DC/DC Converter The LP5526 Boost DC/DC Converter generates an 8…20V supply voltage for the LEDs from single Li-Ion ...
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MAGNETIC BOOST DC/DC CONVERTER ELECTRICAL CHARACTERISTICS Symbol Parameter I Maximum Non-Continuous LOAD Load Current I Maximum Continuous Load LOAD Current V Output Voltage Accuracy OUT (FB Pin) RDS Switch ON Resistance ON f PWM Mode Switching PWM Frequency Frequency Accuracy ...
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Boost Converter Typical Performance Characteristics Vin = 3.6V, Vout = 20.0V if not otherwise stated Boost Converter Efficiency Battery Current vs Voltage Boost Line Regulation 3.0V - 3.6V, no load Boost Typical Waveforms at 150mA Load 20179779 Boost Output Voltage ...
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Boost Load Transient Response 50mA – 150mA Boost Maximum Current vs. Output Voltage www.national.com Autoload Effect on Input Current, No Load 20179785 20179795 10 20179786 ...
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Functionality of Color LED Outputs (RLED, GLED, BLED) LP5526 has one RGB/color LED output, consisting of three individual LED output pins. Output pins can be used in switch mode or constant current mode. Output mode can be selected with the ...
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Overlapping Mode In overlapping mode the brightness is controlled using PWM duty cycle based control method as the following figure shows. Since RGB outputs are on simultaneously, the maximum load peak current is: Non-Overlapping Mode The timing diagram shows the ...
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Maximum current for each LED output is adjusted with the RGB max current register in following way: IR[1:0], IG[1:0], IB[1:0] Maximum current / output ...
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FLASH LED DRIVING USING RGB DRIVERS RGB drivers can be connected in parallel and used as a flash LED driver (see Typical application 2). Flash LEDs can be powered through the boost converter. Flash LEDs are con- trolled basically the ...
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Controlling RGB Max Current Values to Introduce Flash 15 20179703 www.national.com ...
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When RLED, GLED and BLED are connected together as in Typical Application 1, flash current can be adjusted with 8.33% step in constant current mode by changing RGB max current register values as seen on following table. Note that 0% ...
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FLASH SAFETY TIMER FUNCTION Flash safety function can be used to prevent damages due to possible overheating when flash or RGB LEDs have been stuck on because of software or user error. Safety function has two operation modes: 1. Disabling ...
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Backlight Drivers LP5526 has 2 independent backlight drivers. Both drivers are regulated constant current sinks. LED current for both LED MAIN output for 4 LEDs (DISPL = 0) EXTERNAL PWM CONTROL The GPIO[0]/PWM pin can be used to control the ...
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FADE IN / FADE OUT LP5526 has an automatic fade in and out for main and sub backlight. The fade function is enabled with EN_FADE bit. The slope of the fade curve is set by the SLOPE bit. Fade control ...
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Backlight Driver Electrical Characteristics Symbol Parameter I Maximum Sink Current MAX I Leakage Current LEAKAGE I MAIN Current tolerance MAIN SUB Current tolerance I SUB Match Sink Current Matching Error I MAIN-SUB Match Sink Current Matching Error I MAIN-SUB V ...
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General Purpose I/O Functionality LP5526 has three general purpose I/O pins: GPIO[0]/PWM, GPIO[1] and GPIO[2]. GPIO[0]/PWM can also be used as a PWM input for the external LED PWM controlling. GPIO bi- directional drivers are operating from the V main. ...
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Compatible Interface SIGNALS The SCL pin is used for the clock and the SDA pin is used for bidirectional data transfer. Both these signals need a pull- up resistor according to ...
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When a READ function accomplished, a WRITE function must precede the READ function, as shown in the Read Cycle waveform TIMING PARAMETERS (V = 3.0 to 4.5V, V DD1,2 Symbol 1 Hold Time (repeated) ...
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Recommended External Components OUTPUT CAPACITOR, C OUT The output capacitor C directly affects the magnitude of OUT the output ripple voltage. In general, the higher the value the lower the output ripple magnitude. Multilayer ce- OUT ramic ...
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25 www.national.com ...
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LP5526 Register Bit Explanations Each register is shown with a key indicating the accessibility of the each individual bit, and the initial condition: CONTROL REGISTER (00H) – RGB LEDS CONTROL REGISTER D7 D6 RGB_PWM EN_RGB ...
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RGB MAX CURRENT (02H) – MAXIMUM RGB CURRENT CONTROL REGISTER D7 D6 SAFETY_SET SAFETY_SET IR[1:0] IG[1:0] IB[1:0] WLED CONTROL (03H) – WLED CONTROL REGISTER SLOPE FADE_SEL ...
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MAIN CURRENT (04H) – MAIN CURRENT CONTROL REGISTER SUB CURRENT (05H) – SUB CURRENT CONTROL REGISTER GPIO CONTROL (06H) – GPIO CONTROL REGISTER D7 ...
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ENABLES (0BH) – ENABLES REGISTER D7 D6 NSTBY EN_BOOST NSTBY EN_BOOST EN_FLASH EN_AUTOLOAD BOOST OUTPUT (0DH) – BOOST OUTPUT VOLTAGE CONTROL REGISTER BOOST[7:0] 0000 1000 0000 ...
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PWM ENABLE (2BH) – EXTERNAL PWM CONTROL REGISTER D7 D6 EN_SAFETY_ EN_SAFETY_ EN_SAFETY_R EN_SAFETY_G EN_SAFETY_B EN_EXT_R_PWM EN_EXT_G_PWM EN_EXT_B_PWM EN_EXT_MAIN_PWM EN_EXT_SUB_PWM www.national.com EN_SAFETY_ EN_EXT EN_EXT B R_PWM G_PWM RW - ...
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Physical Dimensions inches (millimeters) unless otherwise noted The dimension for X1 ,X2 and X3 are as given: — X1=2.543mm ± 0.03mm — X2=2.543mm ± 0.03mm — X3=0.60mm ± 0.075mm 25-bump micro SMD Package, 2.54 x 2.54 x 0.6mm, 0.5mm pitch ...
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... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...