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Owner's Manual for DIODES models including: AP62300WU-EVM COT Synchronous DC-DC Buck Converter, AP62300WU-EVM, COT Synchronous DC-DC Buck Converter, Synchronous DC-DC Buck Converter, DC-DC Buck Converter, Buck Converter, Converter
DC-DC
AP62300 (Buck Converter)
File Info : application/pdf, 9 Pages, 647.92KB
DocumentDocumentAP62300WU-EVM 18V, 3A, Low Iq, COT Synchronous DC-DC Buck Converter DESCRIPTION The AP62300 is a 3A, synchronous buck converter with a wide input voltage range of 4.2V to 18V. The device fully integrates a 75m high-side power MOSFET and a 45m low-side power MOSFET to provide high-efficiency step-down DC-DC conversion. The AP62300 device is easily used by minimizing the external component count due to its adoption of Constant On-Time (COT) control to achieve fast transient response, easy loop stabilization, and low output voltage ripple. The AP62300 design is optimized for Electromagnetic Interference (EMI) reduction. The device has a proprietary gate driver scheme to resist switching node ringing without sacrificing MOSFET turn-on and turn-off times, which reduces highfrequency radiated EMI noise caused by MOSFET switching. AP62300 is available in a TSOT26 package. FEATURES VIN Range: 4.2V -18V Output Voltage range: 0.8V to 7V 3A Continuous Output Current 0.8V ± 1% Reference Voltage (TA = +25°C) => AP62300 155µA Low Quiescent Current 750kHz Switching Frequency Up to 83% Efficiency at 5mA Light Load Proprietary Gate Driver Design for Best EMI Reduction Protection Circuitry o Undervoltage Lockout (UVLO) o Cycle-by-Cycle Valley Current Limit o Thermal Shutdown Totally Lead-Free & Fully RoHS Compliant Halogen and Antimony Free. "Green" Device APPLICATIONS Flat Screen TV Sets and Monitors Consumer Electronics Network Systems General Purpose Point of Load AP62300WU-EVM Rev. 2 1 of 9 www.diodes.com April 2023 © Diodes Incorporated AP62300WU-EVM 18V, 3A, Low Iq, COT Synchronous DC-DC Buck Converter ABSOLUTE MAXIMUM RATINGS Symbol VIN Parameter Supply Pin Voltage VSW Switch Pin Voltage VBST VEN VFB TST TJ TL ESD Susceptibility HBM CDM Bootstrap Pin Voltage Enable/UVLO Pin Voltage Feedback Pin Voltage Storage Temperature Junction Temperature Lead Temperature Human Body Mode Charge Device Model Rating Unit -0.3 to +20.0 (DC) -0.3 to 22.0 (400ms) V -1.0 to VIN + 0.3 (DC) -2.5 to VIN + 2.0 (20ns) V VSW - 0.3 to VSW + 6.0 V -0.3 to +6.0 V -0.3 to +6.0 V -65 to +150 °C +150 °C +260 °C 2000 V 500 V RECOMMENDED OPERATING CONDITIONS Symbol VIN VOUT TA TJ Parameter Rating Unit Supply Voltage 4.2 to 18 V Output Voltage Range 0.8 to 7 V Operating Ambient Temperature -40 to +85 °C Operating Junction Temperature -40 to +125 °C SETTING OUTPUT VOLTAGE: Table 1 for AP62300 shows a list of recommended component selections for common output voltages. VOUT 1.2V 1.5V 1.8V 2.5V 3.3V 5.0V AP62300WU-EVM Rev. 2 C1 10µF 10µF 10µF 10µF 10µF 10µF C2, C3 R1 R2 L1 2 x 22µF 4.99K 10K 1.5µH 2 x 22µF 8.66K 10K 1.5µH 2 x 22µF 12.4K 10K 2.2µH 2 x 22µF 21.5K 10K 2.2µH 2 x 22µF 31.6K 10K 3.3µH 2 x 22µF 52.3K 10K 3.3µH Table 1. Common Output Voltages 2 of 9 www.diodes.com C6 100nF 100nF 100nF 100nF 220nF 100nF 330nF 100nF 330nF April 2023 © Diodes Incorporated EVALUATION BOARD AP62300WU-EVM 18V, 3A, Low Iq, COT Synchronous DC-DC Buck Converter Figure 1. AP62300WU-EVM QUICK START GUIDE The AP62300WU-EVM has a simple layout and allows access to the appropriate signals through test points. To evaluate the performance of the AP62300WU, follow the procedure below: 1. Connect a power supply to the input terminals VIN and GND. Set VIN to 12V. 2. Connect the positive terminal of the electronic load to VOUT and negative terminal to GND. 3. For Enable, place a jumper at JH8 to "ON" position to connect EN pin to VIN through 100K resistor to enable IC or leave it OPEN. Jump to "OFF" position to disable IC. 4. The evaluation board should now power up with a 5.0V output voltage. AP62300WU-EVM Rev. 2 3 of 9 www.diodes.com April 2023 © Diodes Incorporated AP62300WU-EVM 18V, 3A, Low Iq, COT Synchronous DC-DC Buck Converter 5. Check for the proper output voltage of 5.0V (±1%) at the output terminals VOUT and GND. Measurement can also be done with a multimeter with the positive and negative leads between VOUT and GND. 6. Set the load to 3A through the electronic load. Check for the stable operation of the SW signal on the oscilloscope. Measure the switching frequency. MEASUREMENT/PERFORMANCE GUIDELINES: 1) When measuring the output voltage ripple, maintain the shortest possible ground lengths on the oscilloscope probe. Long ground leads can erroneously inject high frequency noise into the measured ripple. 2) For efficiency measurements, connect an ammeter in series with the input supply to measure the input current. Connect an electronic load to the output for output current. BOOTSTRAP CAPACITOR GUIDELINES: To ensure proper operation, a ceramic capacitor must be connected between the BST and SW pins to supply the drive voltage for the high-side power MOSFET. A 100nF ceramic capacitor is sufficient for most applications. In the cases where output voltage is higher than 2.5V, a higher capacitance is recommended to help maintain stable voltage from BST to SW. Please refer to Tables 1 for details. AP62300WU-EVM Rev. 2 4 of 9 www.diodes.com April 2023 © Diodes Incorporated AP62300WU-EVM 18V, 3A, Low Iq, COT Synchronous DC-DC Buck Converter EVALUATION BOARD SCHEMATIC Figure 2. AP62300WU-EVM Schematic PCB TOP LAYOUT AP62300WU-EVM Rev. 2 Figure 3. AP62300WU-EVM Top Layer 5 of 9 www.diodes.com April 2023 © Diodes Incorporated PCB BOTTOM LAYOUT AP62300WU-EVM 18V, 3A, Low Iq, COT Synchronous DC-DC Buck Converter Figure 4. AP62300WU-EVM Bottom Layer AP62300WU-EVM Rev. 2 6 of 9 www.diodes.com April 2023 © Diodes Incorporated AP62300WU-EVM 18V, 3A, Low Iq, COT Synchronous DC-DC Buck Converter BILL OF MATERIALS for AP62300WU-EVM for VOUT=5V Ref Value C1 10µF C2, C3 22µF C4 0.1µF C6 0.33µF L1 3.3µH R1 52.3K R2 10K R3 0 Description Qty Size Ceramic Capacitor, 25V, X7R, 10% Ceramic Capacitor, 25V, X7R, 10% Ceramic Capacitor, 50V, X7R, 10% Ceramic Capacitor, 16V, X7R, 10% DCR=10.5m, Ir=7.5A SMD Resistor, 1% SMD Resistor, 1% SMD Resistor, 1% 1 1210 2 1210 1 0603 1 0603 10x10x 1 5mm 1 0603 1 0603 1 0603 Vendor Name KEMET KEMET KEMET Samsung Wurth Electronics Panasonic Panasonic Panasonic Manufacturer PN C1210C106K3RACTU C1210C226K3RAC780 0 C0603C104K5RACTU CL10B334KO8NNNC 7447714033 ERJ-3EKF5232V ERJ-3EKF1002V ERJ-3GEY0R00V R4 JH4, JH5, JH6, JH7 JH8 U1 100K SMD Resistor, 1% 1598 AP62300 Terminal Turret Triple 0.094" L (Test Points) PCB Header, 40 POS Sync Buck DC-DC converter 1 0603 Panasonic ERJ-3EKF1003V Through- Keystone 4 Hole Circuit 1598-2 1 1X3 1 TSOT26 3M Diodes Incorporated 2340-6111TG AP62300WU-7 AP62300WU-EVM Rev. 2 7 of 9 www.diodes.com April 2023 © Diodes Incorporated AP62300WU-EVM 18V, 3A, Low Iq, COT Synchronous DC-DC Buck Converter TYPICAL PERFORMANCE CHARACTERISTICS VOUT_AC (20mV/div) IL (2A/div) VSW (10V/div) AP62300WU-EVM Rev. 2 8 of 9 www.diodes.com April 2023 © Diodes Incorporated AP62300WU-EVM 18V, 3A, Low Iq, COT Synchronous DC-DC Buck Converter IMPORTANT NOTICE 1. DIODES INCORPORATED (Diodes) AND ITS SUBSIDIARIES MAKE NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO ANY INFORMATION CONTAINED IN THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). 2. The Information contained herein is for informational purpose only and is provided only to illustrate the operation of Diodes' products described herein and application examples. Diodes does not assume any liability arising out of the applicati on or use of this document or any product described herein. This document is intended for skilled and technically trained engineering customers and users who design with Diodes' products. 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All other trademarks are the property of their respective owners. © 2023 Diodes Incorporated. All Rights Reserved. www.diodes.com AP62300WU-EVM Rev. 2 9 of 9 www.diodes.com April 2023 © Diodes Incorporated