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TPS40322 Datasheet(PDF) 14 Page - Texas Instruments |
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TPS40322 Datasheet(HTML) 14 Page - Texas Instruments |
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14 / 47 page  æ ö = ´ + ç ÷ è ø A OUT BIAS R V 0.6 V 1 R RA + RBIAS COMPx UDG-11111 VREF VOUTx FBx AGND TPS40322 SLUSAF8E – JULY 2011 – REVISED JANUARY 2016 www.ti.com 7.3 Feature Description 7.3.1 Voltage Reference The 600-mV band gap cell is internally connected to the non-inverting input of the error amplifier. The reference voltage is trimmed with the error amplifier in a unity gain configuration to remove amplifier offset from the final regulation voltage. The 0.5% tolerance on the reference voltage allows the user to design a very accurate power supply. 7.3.2 Output Voltage Setting The output voltages of the TPS40322 are set by using external feedback resistor dividers as shown in Figure 15. The regulated output voltage (VOUT) is determined by Equation 1. Figure 15. Setting the Output Voltage (1) 7.3.3 Input Voltage Feedforward The TPS40322 uses input voltage feedforward to maintain a constant power stage gain as the input voltage varies and provides very good response to input voltage transient disturbances. The simple constant power stage gain of the controller greatly simplifies feedback loop design because the loop characteristics remain constant as the input voltage changes, unlike a typical buck converter without voltage feedforward. For modeling purposes, the gain from the COMP pin to the average voltage at the input of the L-C filter is typically 8.5 V/V. 14 Submit Documentation Feedback Copyright © 2011–2016, Texas Instruments Incorporated Product Folder Links: TPS40322 |
Similar Part No. - TPS40322_16 |
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Similar Description - TPS40322_16 |
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