Diodes Incorporated - Analog and Discrete Power SolutionsDiodes Incorporated - Analog and Discrete Power Solutions
Owner's Manual for DIODES models including: AP65111A DC Buck Converter, AP65111A, DC Buck Converter, Buck Converter, Converter
DC-DC
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DocumentDocumentDescription AP65111AWU-EVM 500kHz, 18V, 1.5A, Current Mode, DCM/CCM Synchronous DC/DC Buck Converter in TSOT26 The AP65111A is a 500kHz switching frequency internal compensated synchronous DC/DC buck converter. It has integrated low RDSON high and low side MOSFETs. The AP65111A enables continuous load current of up to 1.5A with efficiency as high as 97%. The AP65111A implements an automatic custom light load efficiency improvement algorithm. The AP65111A features current mode control operation, which enables fast transient response times and easy loop stabilization. The AP65111A simplifies board layout and reduces space requirements with its high level of integration and minimal need for external components, making it ideal for distributed power architectures. The AP65111A is available in a standard Green TSOT26 package and is RoHS compliant. · Gaming Consoles · Flat Screen TV Sets and Monitors · Set Top Boxes · Distributed Power Systems · Green Electronics · Home Audio · Consumer Electronics · Network Systems · FPGA, DSP and ASIC Supplies Performance Spec of AP65111AWU-EVM (Rev1) Parameter Conditions Input Voltage Range 4.5V to 18V Output Current Output Voltage Transient Response Peak-to-peak load step from 0.75A to 1.5A Switching Frequency Efficiency Performance Value 12V 1.5A 3.3V 100mVP-P 500kHz 92% AP65111AWU-EVM Document number: Rev. 1.0 1 of 5 www.diodes.com December 2017 © Diodes Incorporated AP65111AWU-EVM 500kHz, 18V, 1.5A, Current Mode, DCM/CCM Synchronous DC/DC Buck Converter in TSOT26 Figure 1. Evaluation Board (Rev1) Figure 2. Load Transient 0.75 to 1.5A Figure 3. Efficiency (VOUT=3.3V) VIN=18V VIN=12V VIN=4.7V Figure 4. Efficiency (VOUT=5.0V) VIN=18V VIN=12V VIN=6.5V PCB Layouts Top Layer AP65111AWU-EVM Document number: Rev. 1.0 2 of 5 www.diodes.com Bottom Layer December 2017 © Diodes Incorporated AP65111AWU-EVM 500kHz, 18V, 1.5A, Current Mode, DCM/CCM Synchronous DC/DC Buck Converter in TSOT26 Quick Start Guide The AP65111AWU-EVM has a simple layout and allows access to the appropriate signals through test points. To evaluate the performance of the AP65111A, 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. EN has a positive voltage through a 100K pull-up to VIN. No supply input is required for EN. 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 1.5A 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. AP65111AWU-EVM Document number: Rev. 1.0 3 of 5 www.diodes.com December 2017 © Diodes Incorporated EVALUATION BOARD SCHEMATIC AP65111AWU-EVM 500kHz, 18V, 1.5A, Current Mode, DCM/CCM Synchronous DC/DC Buck Converter in TSOT26 BILL OF MATERIALS Ref Value C1, C2 22µF C3 1µF C4 0.1µF Description Ceramic Capacitor, 25V, X5R Ceramic Capacitor, 16V, X7R, 10% Ceramic Capacitor, 25V, X7R, 10% L1 6.5µH DCR=12.5m, Is=10A Qty Size Vendor Name 1 1210 AVX 1 0805 Kemet 1 0805 Samsung 10X10X5 Wurth 1 mm Electronics R1 40.2K Film Resistor, 1% R2 13K Film Resistor, 1% R3 59K Film Resistor, 1% R4 0 Film Resistor, 1% 1 0805 1 0805 1 0805 1 0805 Panasonic Panasonic Panasonic Panasonic R7 100K Film Resistor, 1% 1 Terminal Turret Triple T1 1598 0.094" L (Test Points) 5 U1 DC/DC converter 1 0805 TSOT26 Panasonic Keystone Electronics Diodes AP65111AWU-EVM Document number: Rev. 1.0 4 of 5 www.diodes.com Manufacturer PN 12103D226KAT2A C0805C105K4RACTU CL21B104KACNNNC 744325650 ERJ-6ENF4022V ERJ-6ENF1302V ERJ-6ENF5902V ERJ-6GEY0R00V ERJ-6ENF1003V 1598-1 AP65111AWU December 2017 © Diodes Incorporated AP65111AWU-EVM 500kHz, 18V, 1.5A, Current Mode, DCM/CCM Synchronous DC/DC Buck Converter in TSOT26 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). 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