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LM5181-Q1 Datenblatt(PDF) 17 Page - Texas Instruments |
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LM5181-Q1 Datenblatt(HTML) 17 Page - Texas Instruments |
17 / 33 page 17 LM5181-Q1 www.ti.com SNVSBN6 – APRIL 2020 Product Folder Links: LM5181-Q1 Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated 9.2.1.1 Design Requirements The required input, output, and performance parameters for this application example are shown in Table 1. Table 1. Design Parameters DESIGN PARAMETER VALUE Input voltage range 10 V to 65 V Input UVLO thresholds 9.5 V on, 6.5 V off Output voltage 5 V Rated load current, VIN = 24 V 0.5 A Output voltage regulation ±1.5% Output voltage ripple < 100 mV The target full-load efficiency is 87.5% based on a nominal input voltage of 24 V and an isolated output voltage of 5 V. The LM5181-Q1 is chosen to deliver a fixed 5-V output voltage set by resistor RFB connected between the SW and FB pins. The input voltage turnon and turnoff thresholds are established by RUV1 and RUV2. The required components are listed in Table 2. Transformers for other designs are listed in Table 3. Table 2. List of Components for Design 1 REF DES QTY SPECIFICATION VENDOR PART NUMBER CIN 1 2.2 µF, 100 V, X7R, 1206, ceramic AVX 12061C225K4T2A 2.2 µF, 100 V, X7R, 1210, ceramic, AEC-Q200 TDK CGA6N3X7R2A225K230AB Murata GCJ32DR72A225KA01L Taiyo Yuden HMK325B7225KMHP COUT 1 47 µF, 10 V, X7S, 1210, ceramic, AEC-Q200 TDK CGA6P1X7S1A476M250AC 47 µF, 10 V, X7R, 1210, ceramic Murata GRM32ER71A476KE15L Taiyo Yuden LMK325B7476MM-TR CSS 1 47 nF, 16 V, X7R, 0402 Std Std DCLAMP 1 Zener, 24 V, 1 W, PowerDI-123, AEC-Q101 DFLZ24Q-7 Diodes Inc. DF 1 Switching diode, 75 V, 0.25 A, SOD-323 CMDD4448 Central Semi DFLY 1 Schottky diode, 40 V, 2 A, SOD-123 FSV340FP Onsemi DOUT 1 Zener, 5.6 V, 5%, SOD-523, AEC-Q101 BZX585-C5V6 Nexperia RFB 1 158 kΩ, 1%, 0402 Std Std RSET 1 12.1 kΩ, 1%, 0402 Std Std RTC 1 130 kΩ, 1%, 0402 Std Std RUV1 1 536 kΩ, 1%, 0603 Std Std RUV2 1 100 kΩ, 1%, 0402 Std Std T1 1 44 µH, 1.4 A, 3 : 1, 8.2 × 8.6 × 9.6 mm Würth Electronik 750318633 U1 1 LM5181-Q1 PSR flyback converter, AEC-Q100, VSON-8 Texas Instruments LM5181QNGURQ1 Table 3. Magnetic Components for Various Output Voltages OUTPUT VOLTAGE (RANGE) TURNS RATIO LMAG, ISAT DIMENSIONS VENDOR PART NUMBER 3.3 V (up to 4 V) 4 : 1 40 µH, 1 A 8.6 × 8.26 × 9.65 mm Würth Electronik 750319117 5 V (4 V to 5.5 V) 3 : 1 44 µH, 1 A 750318633 12 V (5.5 V to 16 V) 1 : 1 750318737 24 V (16 V to 32 V) 1 : 2 750318738 48 V (32 V to 50 V) 1 : 3 750319118 15 V and –7.5 V dual 1 : 1.5 : 0.8 30 µH, 1 A 750319119 |
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Ähnliche Beschreibung - LM5181-Q1 |
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