AP64500SP-EVM

AP64500SP-EVM 40V, 5A, Low IQ, Synchronous DC/DC Buck Converter with Programmable Frequency DESCRIPTION The AP64500 is 5A, synchronous buck converter with a wide input voltage range of 3.8V to 40V. The device fully integrates a 45mΩ high-side power MOSFET and a 20mΩ low-side power MOSFET to provide high-efficiency step-down DC/DC conversion. 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 reduces highfrequency radiated EMI noise caused by MOSFET switching. The AP64500 device is easily used by minimizing the external component count due to its adoption of peak current mode control. The device is available in a SO-8EP package. The AP64500 design is optimized for Electromagnetic Interference (EMI) reduction. The converter features Frequency Spread Spectrum (FSS) with a FEATURES          Wide Input Range: 3.8V to 40V 5A Continuous Output Current 0.8V ±1% Reference Voltage 25µA Ultralow Quiescent Current (Pulse Frequency Modulation) Programmable Switching Frequency: 100kHz to 2.2MHz External Clock Synchronization: 100kHz to 2.2MHz Proprietary Gate Driver Design for Best EMI Reduction Frequency Spread Spectrum (FSS) to Reduce EMI Low-Dropout (LDO) Mode AP64500SP-EVM Document number: Rev. 1 - 0 1 of 9 www.diodes.com     Precision Enable Threshold to adjust UVLO Protection Circuitry o Undervoltage Lockout (UVLO) o Output Overvoltage Protection (OVP) o Cycle-by-Cycle Peak Current Limit o Thermal Shutdown Totally Lead-Free & Fully RoHS Compliant Halogen and Antimony Free. “Green” Device June 2019 © Diodes Incorporated AP64500SP-EVM 40V, 5A, Low IQ, Synchronous DC/DC Buck Converter with Programmable Frequency APPLICATIONS         5V, 12V, and 24V Distributed Power Bus Supplies White Goods and Small Home Appliances Home Audio Network Systems Consumer Electronics Cordless Power Tools Optical Communication and Networking Systems General Purpose Point of Load TYPICAL APPLICATIONS CIRCUIT Figure 1. Typical Application Circuit ABSOLUTE MAXIMUM RATINGS Symbol Parameter VIN Supply Pin Voltage VBST Bootstrap Pin Voltage VSW - 0.3 to VSW + 6.0 V VEN Enable/UVLO Pin Voltage -0.3 to +42.0 V VRT/CLK RT/CLK Pin Voltage -0.3 to +6.0 V VFB Feedback Voltage -0.3V to +6.0 V VCOMP Compensation Pin Voltage -0.3 to +6.0 V VSW Switch Node Voltage TJ Junction Temperature +160 °C TL Lead Temperature +260 °C AP64500SP-EVM Document number: Rev. 1 - 0 2 of 9 www.diodes.com Rating Unit -0.3 to +42.0 (DC) V -0.3 to +45.0 (400ms) -0.3 to VIN + 0.3 (DC) -2.5 to VIN + 2.0 (20ns) June 2019 © Diodes Incorporated V AP64500SP-EVM 40V, 5A, Low IQ, Synchronous DC/DC Buck Converter with Programmable Frequency RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min Max Unit VIN Supply Voltage 3.8 40 V VOUT Output Voltage 0.8 39 V TA Operating Ambient Temperature Range -40 +85 °C TJ Operating Junction Temperature Range -40 +125 °C EVALUATION BOARD Figure 2. AP64500SP-EVM AP64500SP-EVM Document number: Rev. 1 - 0 3 of 9 www.diodes.com June 2019 © Diodes Incorporated AP64500SP-EVM 40V, 5A, Low IQ, Synchronous DC/DC Buck Converter with Programmable Frequency QUICK START GUIDE The AP64500SP-EVM has a simple layout and allows access to the appropriate signals through test points. To evaluate the performance of the AP64500SP, 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 JH6 to “ON” position to connect EN pin to VIN through 100KΩ resistor to enable IC. Jump to “OFF” position to disable IC. 4. The evaluation board should now power up with a 5.0V output voltage. 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 5A 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: Table 1 shows a list of recommended component selections for common output voltages. VOUT R1 R2 L1 R7 C7 C1, C2 C5, C6, C12 1.2V 11KΩ 22.1KΩ 1.5µH 3.74KΩ 2.7nF 2x10µF 3x22µF 1.5V 19.6KΩ 22.1KΩ 2.2µH 4.75KΩ 2.7nF 2x10µF 3x22µF 1.8V 27.4KΩ 22.1KΩ 2.2µH 5.62KΩ 2.7nF 2x10µF 3x22µF 2.5V 47.5KΩ 22.1KΩ 3.3µH 7.87KΩ 2.7nF 2x10µF 3x22µF 3.3V 69.8KΩ 22.1KΩ 3.3µH 10.5KΩ 2.7nF 2x10µF 3x22µF 5.0V 115KΩ 22.1KΩ 3.6µH 15.8KΩ 2.7nF 2x10µF 3x22µF 12V 309KΩ 22.1KΩ 10µH 37.4KΩ 2.7nF 2x10µF 3x22µF Table 1. Common Output Voltages AP64500SP-EVM Document number: Rev. 1 - 0 4 of 9 www.diodes.com June 2019 © Diodes Incorporated AP64500SP-EVM 40V, 5A, Low IQ, Synchronous DC/DC Buck Converter with Programmable Frequency EVALUATION BOARD SCHEMATIC Figure 3. AP64500SP-EVM Schematic PCB TOP LAYOUT Figure 4. AP64500SP-EVM – Top Layer AP64500SP-EVM Document number: Rev. 1 - 0 5 of 9 www.diodes.com June 2019 © Diodes Incorporated AP64500SP-EVM 40V, 5A, Low IQ, Synchronous DC/DC Buck Converter with Programmable Frequency PCB BOTTOM LAYOUT Figure 5. AP64500SP-EVM – Bottom Layer AP64500SP-EVM Document number: Rev. 1 - 0 6 of 9 www.diodes.com June 2019 © Diodes Incorporated AP64500SP-EVM 40V, 5A, Low IQ, Synchronous DC/DC Buck Converter with Programmable Frequency BILL OF MATERIALS for AP64500SP-EVM for VOUT=5V Ref Value C1, C2 10µF C3, C4 0.1µF C5, C6, C12 22µF C7 2.7nF C9 0.1µF R1 115KΩ R2 22.1KΩ R3 0Ω R4 100KΩ R6 200KΩ R7 15.8KΩ L1 3.6µH JH6 JH13, JH14, JH15, JH16 1598 U1 AP64500 AP64500SP-EVM Document number: Rev. 1 - 0 Description Ceramic Capacitor, 50V, X7R, 10% Ceramic Capacitor, 50V, X7R, 10% Ceramic Capacitor, 16V, X7R Ceramic Capacitor, 50V, X7R Ceramic Capacitor, 25V, X7R RES SMD 1% 1/8W RES SMD 1% 1/8W RES SMD 1% 1/10W RES SMD 1% 1/10W RES SMD 1% 1/10W RES SMD 1% 1/10W DCR=12.2mΩ, Ir=8.2A PCB Header, 40 POS Terminal Turret Triple 0.094" L (Test Points) Sync DC/DC Converter Qty Size Vendor Name Manufacturer PN 2 1206 Samsung CL31B106KBHNNNE 2 0603 Wurth Electronics 885012206095 3 1210 Samsung CL32B226KOJNNNE 1 0603 Murata GRM1885C1H272JA01D 1 0603 Wurth Electronics 885012206071 1 0603 Panasonic ERJ-3EKF1153V 1 0603 Stackpole RNCP0603FTD22K1 1 0603 Vishay CRCW06030000Z0EAC 1 0603 Vishay CRCW0603100KFKEA 1 0603 Yageo RC0603FR-07200KL 1 Bourns Inc Wurth Electronics CR0603-FX-1582ELF 1 0603 10.2x10.2x 4.5mm 1 1X3 3M 2340-611TG 4 ThroughHole Keystone Electronics 1598-2 1 SO-8EP Diodes Inc AP64500SP 7 of 9 www.diodes.com 7447797360 June 2019 © Diodes Incorporated AP64500SP-EVM 40V, 5A, Low IQ, Synchronous DC/DC Buck Converter with Programmable Frequency TYPICAL PERFORMANCE CHARACTERISTICS Figure 6. Efficiency vs Output Current Figure 7. Load Transient 3A to 5A Figure 8. Output Voltage Ripple, IOUT=5A Figure 9. Output Short Protection, IOUT=5A AP64500SP-EVM Document number: Rev. 1 - 0 8 of 9 www.diodes.com June 2019 © Diodes Incorporated AP64500SP-EVM 40V, 5A, Low IQ, Synchronous DC/DC Buck Converter with Programmable Frequency 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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