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TPS40322RHBT Datasheet(PDF) 26 Page - Texas Instruments |
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TPS40322RHBT Datasheet(HTML) 26 Page - Texas Instruments |
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26 / 47 page  TPS40322 SLUSAF8E – JULY 2011 – REVISED JANUARY 2016 www.ti.com 8.2.1.1 Design Requirements The design goal parameters are listed in Table 3. Table 3. TPS40322 Dual Output Design Example Specification PARAMETER TEST CONDITION MIN TYP MAX UNIT INPUT CHARACTERISTICS VIN Input voltage 8 12 15 V VIN(ripple) Input ripple IOUT1 = IOUT2 = 10 A 0.25 V OUTPUT 1 CHARACTERISTICS VOUT1 Output voltage IOUT1(min) ≤ IOUT1 ≤ IOUT1(max) 1.2 V Line regulation VIN(min) ≤ VIN ≤ VIN(max) 0.5% Load regulation IOUT1(min) ≤ IOUT1 ≤ IOUT1(max) 0.5% VRIPPLE1 Output ripple IOUT1 = IOUT1(max) 24 mV VOVER1 Output overshoot ΔIOUT1 = 5 A 40 mV VUNDER1 Output undershoot ΔIOUT1 = 5A 40 mV IOUT1 Output current VIN(min) ≤ VIN ≤ VIN(max) 0 10 A ISCP1 Short circuit current trip point 15 A OUTPUT 2 CHARACTERISTICS VOUT2 Output voltage IOUT2(min) ≤ IOUT2 ≤ IOUT2(max) 1.8 V Line regulation VIN(min) ≤ VIN ≤ VIN(max) 0.5% Load regulation IOUT2(min) ≤ IOUT2 ≤ IOUT2(max) 0.5% VRIPPLE2 Output ripple IOUT2 = IOUT2(max) 36 mV VOVER2 Output overshoot ΔIOUT2 = 5 A 40 mV VUNDER2 Output undershoot ΔIOUT2 = 5 A 40 mV IOUT2 Output current VIN(min) ≤ VIN ≤ VIN(max) 0 10 A ISCP2 Short circuit current trip point 15 A GENERAL CHARACTERSTICS tSS Soft-start time VIN = 12 V 2 ms η Efficiency VIN = 12 V, IOUT1= IOUT2 = 10 A 88% fSW Switching frequency 500 kHz 8.2.1.2 Detailed Design Procedure Inductor Selection (L1) through General Device Components show equations and calculations regarding VOUT1. VOUT2 values can be calculated using similar equations. See Table 4 for the list of materials. Table 4. Design Example 1, Dual-Output List of Materials REFERENCE QTY DESCRIPTION PART NUMBER MFR DESIGNATOR Capacitor, Aluminum, 100 µF, 35 V, ±20%, 0.328 x C1 1 EEV-FK1V101GP Panasonic - ECG 0.328 inch C2, C7, C20, C26, 5 Capacitor, Ceramic, 0.1 µF, 50 V, X7R, ±10%, 0603 Std Std C39 C3, C35 2 Capacitor, Ceramic, 0.1 µF, 25 V, X5R, ±10%, 0402 Std Std C4, C36 2 Capacitor, Ceramic, 1.0 µF, 25 V, X7R, ±10%, 0603 Std Std C5, C6, C37, C38 4 Capacitor, Ceramic, 10 µF, 25 V, X5R, ±10%, 0805 Std Std C8, C25 2 Capacitor, Ceramic, 33 nF, 16 V, X7R, ±10%, 0603 Std Std Capacitor, Ceramic, 470 pF, 25 V, C0G, NP0, ±5%, C9, C19, C22, C34 4 Std Std 0603 C10, C27 2 Capacitor, Ceramic, 1.0 µF, 6.3 V, X5R, ±10%, 0402 Std Std C11, C12, C18, C28, 5 Capacitor, Ceramic, 3.3 µF, 10 V, X5R, ±10%, 0603 C1608X5R1A335K TDK Corporation C29 26 Submit Documentation Feedback Copyright © 2011–2016, Texas Instruments Incorporated Product Folder Links: TPS40322 |
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