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GRM32ER71H475KA88L Datasheet(PDF) 2 Page - Texas Instruments |
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GRM32ER71H475KA88L Datasheet(HTML) 2 Page - Texas Instruments |
2 / 25 page Background www.ti.com 1 Background The TPS55340 DC/DC converter is in typical applications a step-up boost converter, however this EVM uses it in a SEPIC topology. Rated input voltage and output current range for the evaluation module are given in Table 1. This evaluation module demonstrates the performance of the TPS55340 in an example application and can accommodate evaluation of other SEPIC applications supported by the TPS55340. This design shows a small printed-circuit-board area that can be achieved when designing with the TPS55340 regulator. However, appropriate sizing of the inductor and diode for the desired application can further reduce the board area. The switching frequency is externally set at a nominal 500kHz. The 40V, 5A, low-side MOSFET is incorporated inside the TPS55340 package along with the gate drive circuitry. The low drain-to-source on-resistance of the MOSFET allows the TPS55340 to achieve high efficiencies. The compensation components are external to the integrated circuit (IC). In this example application the absolute maximum input voltage for the TPS55340EVM-147 is 26V. Table 1. Input Voltage and Output Current Summary EVM Input Voltage Range Maximum Output Current TPS55340EVM-147 V IN = 6V to 18V I OUTmax = 1A 2 Performance Specification Summary Table 2 provides a summary of the TPS55340EVM-147 performance specifications. Specifications are given for an input voltage of V IN = 6V and VIN = 18V with an output voltage of 12V, unless otherwise specified. The ambient temperature is 25°C for all measurements, unless otherwise noted. Table 2. Performance Specification Summary Specification Test Conditions Min Typ Max Unit VIN voltage range 6 12 18 V Output voltage set point 12 V Line regulation IOUT = 500mA, VIN = 6V to 18V ±0.1% Operating frequency 500 kHz Output current range .001 1 A Output over current limit(1) VIN = 6V 1.5 2.6 A Output over current limit(1) VIN = 18V 1.9 3.4 A Load regulation IOUT = 1mA to 1A, VIN = 6V to 18V ±0.1% Voltage change –480 mV IOUT = 250mA to 750mA, VIN = 6V Recovery time 1 ms Load transient response Voltage change 480 mV IOUT = 750mA to 250mA, VIN = 6V Recovery time 1 ms Loop bandwidth IOUT = 1A, VIN = 6V 6.3 kHz Phase margin IOUT = 1A, VIN = 6V 59.3 ° Loop bandwidth IOUT = 1A, VIN = 18V 13.2 kHz Phase margin IOUT = 1A, VIN = 18V 66.5 ° Output ripple voltage IOUT = 1A, VIN = 6V 60 mVpp Output ripple voltage IOUT = 1A, VIN = 18V 40 mVpp Maximum efficiency TPS55340EVM-147, VIN = 6V, IOUT = 350mA 92.1% Maximum efficiency TPS55340EVM-147, VIN = 18V, IOUT = 1A 92.1% (1) The over current limit is dependent on the input voltage and based on peak current limit of the TPS55340. 2 TPS55340EVM-147, 6V to 18V Input, 12V Output SEPIC Evaluation Module SLVU742 – June 2012 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated |
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