LP3936SL National Semiconductor, LP3936SL Datasheet
LP3936SL
Specifications of LP3936SL
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LP3936SL Summary of contents
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... LED types and for efficiency optimization. All func- tions are software controllable through an I MicroWire/SPI compatible interface and 16 internal regis- ters. Typical Application © 2005 National Semiconductor Corporation Features n High Efficiency 250 mA Magnetic Boost DC-DC Converter with Programmable Output Voltage n PWM controlled RGB LED drivers with programmable ...
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... Both will vary considerably. Ordering Information Order Number LP3936SL LP3936SLX www.national.com See NS Package Number SLD32A 20081402 20081404 Package Mark — Top View Package Marking LP3936SL LP3936SL 2 20081403 Bottom View Supplied As 1000 units, Tape-and-Reel 2500 units, Tape-and-Reel ...
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Pin Description Pin Name Type 1 GND_BOOST Ground 2 FB Input 3 V Power DD2 4 GND2 Ground 5 WLED1 LED Output 6 WLED2 LED Output 7 WLED3 LED Output 8 WLED4 LED Output 9 GND_WLED Ground 10 WLED5 LED ...
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... Note 3: Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T 140˚C (typ.). Note 4: For detailed soldering specifications and information, please refer to National Semiconductor Application Note 1125: Laminate CSP/FBGA Package (AN-1125). Note 5: The Human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200 pF capacitor discharged directly into each pin ...
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Electrical Characteristics Note 6: In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may have to be derated. Maximum ambient temperature (T A-MAX dissipation of the device in the application (P D-MAX ...
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Modes of Operation RESET: In the RESET mode all the internal registers are reset to the default values. Boost output register is set to 4.55V (register 0Dh = 07h), ext_pwm is enabled for color outputs (register 2Bh = 1Ch), EN_BOOST ...
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Logic Interface Characteristics (1.8V ≤ V Symbol Parameter LOGIC INPUTS DI, SCL, NRST, RGB_EN, CS, MW_SEL V Input Low Level IL V Input High Level IH I Logic Input Current I f Clock Frequency SCL LOGIC OUTPUTS DO ...
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MicroWire/SPI Interface The Microwire transmission consists of 16-bit Write and Read Cycles. One cycle consists of 7 Address bits, 1 Read/ Write (R/W) bit and 8 Data bits. Read is done in two cycles: address is provided in the first ...
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MicroWire/SPI Interface MicroWire Timing Parameters V = 3.0V – 6V 1.8V – V DD1,2 DD_IO Symbol 1 Cycle Time 2 Enable Lead Time 3 Enable Lag Time 4 Clock Low Time 5 Clock High Time 6 Data Setup ...
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I C Compatible Interface START AND STOP CONDITIONS START and STOP bits classify the beginning and the end of the I transitioning from HIGH to LOW while SCL line is HIGH. STOP condition is defined as ...
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I C Compatible Interface Timing Parameters V = 3.0V to 4.5V 1.65V to V DD1, 2 DD_IO Symbol 1 Hold Time (repeated) START Condition 2 Clock Low Time 3 Clock High Time 4 Setup ...
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A/D Converter for Ambient Light Measurement Electrical Characteristics Symbol Parameter V Input Voltage IN RANGE DNL Differential Non-Linearity GE Gain Error PSS Power Supply Sensitivity f(conv) Conversion Rate t Startup Time STARTUP I Input Current AIN I Maximum Output Current ...
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Magnetic Boost DC/DC Converter The LP3936 Boost DC/DC Converter generates a 4.1V–5.3V supply voltage for the LEDs from single Li-Ion battery (3V … 4.5V). The output voltage is controlled with an 8-bit register in 9 steps. The converter is a ...
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Magnetic Boost DC/DC Converter Electrical Characteristics Symbol Parameter I Load Current LOAD V Output Voltage Accuracy (FB Pin) OUT Output Voltage (FB Pin) RDS Switch ON Resistance ON f PWM Mode Switching Frequency PWF Frequency Accuracy t Startup Time STARTUP ...
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Boost Converter Typical Performance Characteristics otherwise stated. (Continued) Battery Current vs Voltage Boost Typical Waveforms at 100 mA Load Boost Line Regulation Battery Current vs Voltage 20081421 Boost Startup with No Load 20081423 Boost Load Regulation, 50 mA–100 mA 20081425 ...
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RGB LED Driver The RGB driver has three outputs that can independently drive one RGB LED or three LEDs of any kind. User has control over the following parameters separately for each LED: • ON and OFF (start and stop ...
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RGB Driver Electrical Characteristics ( outputs) OUT OUT OUT Symbol Parameter R ON Resistance DS-ON I Off State Leakage Current LEAKAGE I Maximum Sink Current MAX T Maximum Slope Period SMAX T Minimum Slope Period SMIN ...
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RGB LED PWM Control EN_X_PWM = 0 → External PWM control from RGB_EN pin is disabled EN_RED_PWM EN_X_PWM = 1 → External PWM control from RGB_EN pin is enabled EN_GREEN_PWM EN_BLUE_PWM Internal PWM control (DUTY) can be used independently of ...
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WLED Current Adjustment WLED Current WLED[7:0] (Typical) 0000 0000 0 0000 0001 0.1 0000 0010 0.2 0000 0011 0.3 • • • • 1111 1101 25.3 1111 1110 25.4 1111 1111 25.5 WLED Output Current vs Voltage Temperatures −40˚C, +25˚C, ...
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Recommended External Components List of Recommended External Components (Continued) Symbol Symbol Explanation RGB RGB LED Current Limit Resistors LEDs White LEDs Note 16: Resistor RT tolerance change will change the timing accuracy ...
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... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...