LM2611EVAL

User's Guide SNVA041B – August 2001 – Revised April 2013 AN–1203 LM2611 Demo Board 1 Introduction The LM2611 demo board is a working demonstration of a typical LM2611 Cuk converter layout. This document contains information about the board. For more information on the LM2611 and Cuk topology, see the device-specific data sheet. 2 General Description The LM2611 is typically used in inverting Cuk converter applications. The Cuk converter offers the advantages of low input and output ripple current and the ability to step up or step down the magnitude of the input voltage. The NFB pin allows for simple feedback of the negative output voltage. The demo board is assembled to show a small yet practical layout. The board will operate under the following conditions: 4.5 V ≤ VIN ≤ 5.5 V VOUT = −5 V 0 ≤ IOUT ≤ 300 mA Note: The input capacitor is rated for 6.3 V. Do not apply greater than 5.5 V without first replacing the input capacitor with one of higher voltage rating (VIN(MAX) = 14 V). The input voltage may be as low as 2.7 V, however the maximum load will be lower than 300 mA. All trademarks are the property of their respective owners. SNVA041B – August 2001 – Revised April 2013 Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated AN–1203 LM2611 Demo Board 1 General Description www.ti.com Table 1. Bill of Materials Component Value Description Model Number CBYP 0.1 µF Bypass Capacitor VJ0805Y104KXAAT (Vishay) CCUK 2.2 µF Cuk Capacitor EMK316BJ225ML (Taiyo Yuden) CFF 1 nF Feedforward Capacitor VJ0805Y102KXAAT (Vishay) CIN 22 µF/6.3 V Input Capacitor LMK325BJ226MM (Taiyo Yuden) COUT 22 µF/6.3 V Output Capacitor LMK325BJ226MM (Taiyo Yuden) Scottky Diode MBRM120LT3 (Motorola) D L1 22 µH Input Inductor CR32-220 (Sumida) L2 22 µH Output Inductor CR32-220 (Sumida) RFB1 29.4 kΩ Feedback Resistor CRCW08052492FRT1 (Vishay) RFB2 10.0 kΩ Feedback Resistor CRCW08051002FRT1 (Vishay) Figure 1. LM2611 Demo Board Top Layer Layout Figure 2. LM2611 Demo Board Bottom Layer Layout 2 AN–1203 LM2611 Demo Board SNVA041B – August 2001 – Revised April 2013 Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms and conditions of sale of semiconductor products. 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