LM27966SQX/NOPB National Semiconductor, LM27966SQX/NOPB Datasheet
LM27966SQX/NOPB
Specifications of LM27966SQX/NOPB
Related parts for LM27966SQX/NOPB
LM27966SQX/NOPB Summary of contents
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... LED forward voltage, so that efficiency is maximized over the input voltage range. The LM27966 is available in National’s small 24-pin Lead- less Leadframe Package (LLP-24). Typical Application Circuit © 2006 National Semiconductor Corporation Features n 91% Peak LED Drive Efficiency n No Inductor Required n 0.3% Current Matching ...
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Connection Diagram Pin Descriptions Pin #s Pin Names OUT 19, 22 (C1) C1, C2 20, 21 (C2) 12, 13, 14, 15, D5, D4, D3, D2 AUX 17 I SET 1 SCL ...
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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. V pin voltage IN SCL, SDIO, VIO, RESET pin voltages I Pin Voltages Dx Continuous Power Dissipation (Note 3) Junction Temperature (T ) J-MAX Storage Temperature Range Maximum Lead Temperature ...
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... JA Note 7: Junction-to-ambient thermal resistance is highly dependent on application and board layout. In applications where high maximum power dissipation exists, special care must be paid to thermal dissipation issues in board design. For more information, please refer to National Semiconductor Application Note 1187: Leadless Leadframe Package (AN-1187). Note 8: Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm. ...
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Electrical Characteristics Note 10: The maximum total output current for the LM27966 should be limited to 180mA. The total output current can be split among any of the three banks ( 30mA Max.). Under maximum output current ...
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Block Diagram www.national.com 6 20190103 ...
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Typical Performance Characteristics 3.6V 16.9kΩ LEDx LEDAUX SET LED Drive Efficiency vs Input Voltage Main Bank Current Regulation vs Input Voltage Main Bank Current Matching vs Input Voltage Unless otherwise ...
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Circuit Description OVERVIEW The LM27966 is a white LED driver system based upon an adaptive 1.5x/1x CMOS charge pump capable of supplying up to 180mA of total output current. With two controlled banks of constant current sinks (Main and AUX), ...
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Circuit Description (Continued) line during the 9th clock pulse, signifying an acknowledge. The LM27966 generates an acknowledge after each byte has been received. 2 After the START condition, the I C master sends a chip address. This address is seven ...
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Circuit Description (Continued) Bit7 to Bit 5: Not Used DAUX1-DAUX0: Sets Brightness for D AUX Brightness Level Control Table (Main Display) Brightness Code (hex ...
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Application Information MAXIMUM OUTPUT CURRENT, MAXIMUM LED VOLTAGE, MINIMUM INPUT VOLTAGE The LM27966 can drive 6 LEDs at 30mA each (Main Display and D ) from an input voltage as low as 3.2V, so long as AUX the LEDs have ...
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... National highly recommends a 1:1 ratio between the pack- age and the PCB thermal land. To further enhance thermal conductivity, the PCB thermal land may include vias to a ground plane. For more detailed instructions on mounting LLP packages, please refer to National Semiconductor Ap- plication Note AN-1187. 12 ± ...
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