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TPS84410RKGR Datasheet(PDF) 10 Page - Texas Instruments |
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TPS84410RKGR Datasheet(HTML) 10 Page - Texas Instruments |
10 / 28 page ( ) = W æ ö æ ö - ç ÷ ç ÷ è ø è ø SET OUT 1.43 R k V 1 0.803 TPS84410 SLVSAR5 – SEPTEMBER 2011 www.ti.com APPLICATION INFORMATION ADJUSTING THE OUTPUT VOLTAGE The VADJ control sets the output voltage of the TPS84410. The output voltage adjustment range is from 0.8V to 3.6V. The adjustment method requires the addition of RSET, which sets the output voltage, the connection of SENSE+ to VOUT, and in some cases RRT which sets the switching frequency. The RSET resistor must be connected directly between the VADJ (pin 35) and AGND (pin 33 & 34). The SENSE+ pin (pin 36) must be connected to VOUT either at the load for improved regulation or at VOUT of the module. The RRT resistor must be connected directly between the RT/CLK (pin 4) and AGND (pins 33 & 34). Table 1 gives the standard external RSET resistor for a number of common bus voltages, along with the recommended RRT resistor for that output voltage. Table 1. Standard RSET Resistor Values for Common Output Voltages RESISTORS OUTPUT VOLTAGE VOUT (V) 0.8 1.2 1.5 1.8 2.5 3.3 RSET (kΩ) open 2.87 1.65 1.15 0.673 0.459 RRT (kΩ) 1200 715 348 348 348 348 For other output voltages, the value of the required resistor can either be calculated using the following formula, or simply selected from the range of values given in Table 2. (1) Table 2. Standard RSET Resistor Values VOUT (V) RSET (kΩ) RRT(kΩ) fSW(kHz) VOUT (V) RSET (kΩ) RRT(kΩ) fSW(kHz) 0.8 open 1200 650 2.3 0.768 348 1000 0.9 11.8 1200 650 2.4 0.715 348 1000 1.0 5.83 1200 650 2.5 0.673 348 1000 1.1 3.83 1200 650 2.6 0.634 348 1000 1.2 2.87 715 750 2.7 0.604 348 1000 1.3 2.32 715 750 2.8 0.576 348 1000 1.4 1.91 715 750 2.9 0.549 348 1000 1.5 1.65 348 1000 3.0 0.523 348 1000 1.6 1.43 348 1000 3.1 0.499 348 1000 1.7 1.27 348 1000 3.2 0.475 348 1000 1.8 1.15 348 1000 3.3 0.459 348 1000 1.9 1.05 348 1000 3.4 0.442 348 1000 2.0 0.953 348 1000 3.5 0.422 348 1000 2.1 0.845 348 1000 3.6 0.412 348 1000 2.2 0.825 348 1000 10 Copyright © 2011, Texas Instruments Incorporated |
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