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TL4050C20-Q1 Datasheet(PDF) 11 Page - Texas Instruments |
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TL4050C20-Q1 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 20 page TL4050-Q1 IZ + IL IL IZ VS VZ RS R S + V S * VZ (I L ) IZ) TL4050-Q1 www.ti.com SLOS588F – JUNE 2008 – REVISED APRIL 2013 Cathode and Load Currents In a typical shunt-regulator configuration (see Figure 9), an external resistor, RS, connects between the supply and the cathode of the TL4050-Q1. Proper choice of RS is essential, as RS sets the total current available to supply the load (IL) and bias the TL4050-Q1 (IZ). In all cases, IZ must stay within a specified range for proper operation of the reference. Taking into consideration one extreme in the variation of the load and supply voltage (maximum IL and minimum VS), RS must be small enough to supply the minimum IZ required for operation of the regulator, as given by data-sheet parameters. At the other extreme, maximum VS and minimum IL, RS must be large enough to limit IZ to less than its maximum-rated value of 15 mA. Equation 1 calculates RS: (1) Figure 9. Shunt Regulator Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 11 |
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