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LM25183 Datasheet(PDF) 17 Page - Texas Instruments |
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LM25183 Datasheet(HTML) 17 Page - Texas Instruments |
17 / 39 page 17 LM25183 www.ti.com SNVSBJ3 – APRIL 2020 Product Folder Links: LM25183 Submit Documentation Feedback Copyright © 2020, Texas Instruments Incorporated 8.2.1.1 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 6 V to 36 V Input UVLO thresholds 5.5 V on, 4 V off Output voltage 12 V Rated load current, VIN ≥ 13.5 V 0.6 A Output voltage regulation ±1.5% Output voltage ripple < 120 mV pk-pk The target full-load efficiency is 89% based on a nominal input voltage of 24 V and an isolated output voltage of 12 V. The LM25183 is chosen to deliver a fixed 12-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 single-output designs are listed in Table 3. Table 2. List of Components for Design 1 REF DES QTY SPECIFICATION VENDOR PART NUMBER CIN 1 10 µF, 50 V, X7R, 1210, ceramic TDK C3225X7R1H106M250AC COUT1 3 22 µF, 25 V, X7R, 1210, ceramic TDK C3225X7R1E226M250AB Taiyo Yuden TMK325B7226MM-PR 22 µF, 25 V, X7R, 1210, ceramic Würth Electronik 885012209074 COUT2 0 100 µF, 16 V, ±20%, electrolytic Kemet T598D107M016ATE050 CSS 1 47 nF, 16 V, X7R, 0402 Std Std DCLAMP 1 Zener, 20 V, 3 W, SMA 3SMAJ5932B Micro Commercial DF, DFLY 2 Schottky diode, 60 V, 3 A, SOD-123FL FSV360FP OnSemi DOUT 1 Zener, 13 V, 2%, SOD-523 BZX585-B13 Nexperia RFB 1 121 kΩ, 1%, 0402 Std Std RSET 1 12.1 kΩ, 1%, 0402 Std Std RTC 1 261 kΩ, 1%, 0402 Std Std RUV1 1 261 kΩ, 1%, 0603 Std Std RUV2 1 97.6 kΩ, 1%, 0402 Std Std T1 1 12.5 µH, 3 A, 1 : 1, 13 mm × 11 mm × 10 mm Coilcraft ZB1053-AE U1 1 LM25183 PSR flyback converter, VSON-8 Texas Instruments LM25183NGUR Table 3. Magnetic Components for Single-Output Designs OUTPUT VOLTAGE RANGE TURNS RATIO LMAG, ISAT DIMENSIONS VENDOR PART NUMBER Up to 3.6 V 4 : 1 12.5 µH, 3 A 13 × 11 × 10 mm Coilcraft ZB1050-AE 3.6 V to 5 V 3 : 1 14 µH, 3 A ZB1051-AE 5 V to 8 V 2 : 1 14 µH, 3 A ZB1052-AE 8 V to 15 V 1 : 1 12.5 µH, 3 A ZB1053-AE 15 V to 28 V 1 : 2 12.5 µH, 3 A ZB1054-AE 28 V to 50 V 1 : 3 14 µH, 3 A ZB1055-AE |
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