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LM27965 Datasheet(Hoja de datos) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
No. de Pieza. LM27965
Descripción  Dual Display White LED Driver with I2C Compatible Brightness Control
Descarga  13 Pages
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Fabricante  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
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Electrical Characteristics (Notes 2, 8) (Continued)
Note 11: For the two groups of current sinks on a part (BankA and BankB), the following are determined: the maximum sink current in the group (MAX), the minimum
sink current in the group (MIN), and the average sink current of the group (AVG). For each group, two matching numbers are calculated: (MAX-AVG)/AVG and
(AVG-MIN)/AVG. The largest number of the two (worst case) is considered the matching figure for the bank. The matching figure for a given part is considered to
be the highest matching figure of the two banks. The typical specification provided is the most likely norm of the matching figure for all parts.
Note 12: For each Dxx pin, headroom voltage is the voltage across the internal current sink connected to that pin. For Group A, B, and C current sinks, VHRx =VOUT
-VLED. If headroom voltage requirement is not met, LED current regulation will be compromised.
Note 13: SCL and SDIO signals are referenced to VIO and GND for minimum VIO voltage testing.
Note 14: SCL and SDIO should be glitch-free in order for proper brightness control to be realized.
Block Diagram
20155003
www.national.com
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