AP63203WU-EVM

AP63203WU-EVM 32V, 2A, Synchronous DC/DC Buck Converter With Enhanced EMI Reduction DESCRIPTION The AP63203 is a 2A, synchronous buck converter with a wide input voltage range of 3.8V to 32V and fully integrates a 125mΩ high-side power MOSFET and a 68mΩ lowside power MOSFET to provide highefficiency step-down DC/DC conversion. The AP63203 device is easily used by minimizing the external component count due to its adoption of peak current mode control along with its integrated compensation network. with a switching frequency jitter of ±6%, which reduces EMI by not allowing emitted energy to stay in any one frequency for a significant period of time. It also has a proprietary gate driver scheme to resist switching node ringing without sacrificing MOSFET turn-on and turn-off times, which further reduces high-frequency radiated EMI noise caused by MOSFET switching. The device is available in a low-profile, TSOT26 package. The AP63203 is fixed output buck converters with Electromagnetic Interference (EMI) reduction. The converter features Frequency Spread Spectrum (FSS) FEATURES         VIN 3.8V to 32V 2A Continuous Output Current 0.8V ± 1% Reference Voltage 22µA Ultralow Quiescent Current (Pulse Frequency Modulation) 1.1MHz Switching Frequency Supports Pulse Frequency Modulation (PFM) and Pulse Width Modulation (PWM) Proprietary Gate Driver Design for Best EMI Reduction AP63203WU-EVM Document number: Rev. 1 - 0    1 of 7 www.diodes.com Frequency Spread Spectrum (FSS) to Reduce EMI Low-Dropout (LDO) Mode Precision Enable Threshold to Adjust UVLO Protection Circuitry o Undervoltage Lockout (UVLO) o Cycle-by-Cycle Peak Current Limit o Thermal Shutdown June 2019 © Diodes Incorporated AP63203WU-EVM 32V, 2A, Synchronous DC/DC Buck Converter With Enhanced EMI Reduction APPLICATIONS           12V and 24V Distributed Power Bus Supplies Flat Screen TV Sets and Monitors Power Tools and Laser Printers White Goods and Small Home Appliances FPGA, DSP, and ASIC Supplies Home Audio Network Systems Set Top Boxes Gaming Consoles Consumer Electronics FUNCTIONAL BLOCK 2 EN 1.18V 0.88V 0.4V 0.8V 1.1V 3 VCC Regulator 4uA + - VIN OVP RT = 0.xxV/A - 1.5uA Internal Reference ON + 20k + - SE = 0.9V/T 1 FB 5V + - UVP Oscillator 1.MHz + 6 BST OCP Ref 0.8V Internal SS COMP + gm + Error Amplifier + 18k Logic HS PWM Comparator 5 SW 7.6nF LS 4 GND Figure 1. Functional Block Diagram ABSOLUTE MAXIMUM RATINGS Symbol Parameter VIN Supply Voltage VSW Switch Node Voltage AP63203WU-EVM Document number: Rev. 1 - 0 Rating -0.3 to +35.0 (DC) -0.3 to +40.0 (400ms) -1.0 to VIN + 0.3 (DC) 2 of 7 www.diodes.com Unit V V June 2019 © Diodes Incorporated AP63203WU-EVM 32V, 2A, Synchronous DC/DC Buck Converter With Enhanced EMI Reduction -2.5 to VIN + 2.0 (20ns) VBST Bootstrap Voltage VSW - 0.3 to VSW + 6.0 V VFB Feedback Voltage -0.3 to +6.0 V VEN Enable/UVLO Voltage -0.3 to +35.0 V TST Storage Temperature -65 to +150 °C TJ Junction Temperature +150 °C TL Lead Temperature +260 °C HBM Human Body Mode 2000 V CDM Charge Device Model 1000 V ESD Susceptibility RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min Max Unit VIN Supply Voltage 3.8 32 V TA Operating Ambient Temperature Range -40 +85 °C TJ Operating Junction Temperature Range -40 +125 °C EVALUATION BOARD Figure 2. AP63203WU-EVM AP63203WU-EVM Document number: Rev. 1 - 0 3 of 7 www.diodes.com June 2019 © Diodes Incorporated AP63203WU-EVM 32V, 2A, Synchronous DC/DC Buck Converter With Enhanced EMI Reduction QUICK START GUIDE The AP63203WU-EVM has a simple layout and allows access to the appropriate signals through test points. To evaluate the performance of the AP63203WU, follow the procedure below: 1. For evaluation board configured at VOUT=3.3V, 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 to “H” position to enable IC. Jump to “L” position to disable IC. 4. The evaluation board should now power up with a 3.3V output voltage. 5. Check for the proper output voltage of 3.3V (±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 2A 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. SETTING OUTPUT VOLTAGE: Setting the output voltage The AP63203 is fixed output buck converters. The output voltage is 3.3V. Connect VFB pin to output directly as schematic shown. AP63203WU-EVM Document number: Rev. 1 - 0 4 of 7 www.diodes.com June 2019 © Diodes Incorporated AP63203WU-EVM 32V, 2A, Synchronous DC/DC Buck Converter With Enhanced EMI Reduction EVALUATION BOARD SCHEMATIC FB R2 EN H EN R1 AP63203 J1 L BS R3 C5 L1 VOUT LX R4 C6~8 C4 VIN VIN GND C1~3 Figure 3. AP63203WU-EVM Schematic BILL OF MATERIALS for AP63203WU-EVM (VOUT=3.3V) Item Value C2 10uF C3 0.1uF C4 100pF C5 0.1uF C6 & C7 22uF L1 6.8uH R3 U1 0 AP63203WU-EVM Document number: Rev. 1 - 0 Type Rating Description 35V Input CAP 50V Input CAP 100V Feedback CAP 50V Bootstrap CAP 25V Output CAP 6060 5.0A Inductor 0603 AP63203WU 1% Bootstrap RES TSOT26 X5R/X7R, Ceramic/1206 X5R/X7R, Ceramic/0603 0603 X5R/X7R, Ceramic/0603 X5R/X7R, Ceramic/1206 5 of 7 www.diodes.com Description Würth PART 885 012 206 095 Würth PART 885 012 206 102 Würth PART 885 012 206 095 Würth PART 744 393 460 68 Diodes Inc June 2019 © Diodes Incorporated AP63203WU-EVM 32V, 2A, Synchronous DC/DC Buck Converter With Enhanced EMI Reduction TYPICAL PERFORMANCE CHARACTERISTICS Figure 4. Efficiency for VIN=12V, VOUT= 3.3V 100 95 Efficiency (%) 90 85 80 75 70 Vin=12V, Vo=3.3V 65 60 10 100 1000 Output Current (mA) Figure 5. Output Ripple for VIN=12V, VOUT=3.3V, IOUT=2A VOUT_AC (20mV/div) IL (1A/div) VSW (10V/div) 5µS/div AP63203WU-EVM Document number: Rev. 1 - 0 6 of 7 www.diodes.com June 2019 © Diodes Incorporated AP63203WU-EVM 32V, 2A, Synchronous DC/DC Buck Converter With Enhanced EMI Reduction IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. 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