AP62200
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AP62200
AP62600SJ-EVM - Diodes Incorporated
15 gen 2022 — 4.5V TO 18V INPUT, 6A SYNCHRONOUS BUCK CONVERTER. AP62600SJ-EVM ... transient response, easy loop stabilization, and low ... QUICK START GUIDE.
AP62600SJ-EVM-User-Guide-Rev1.1 (818 KB)
AP62600 (Buck Converter)
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AP62600SJ-EVM 4.5V TO 18V INPUT, 6A SYNCHRONOUS BUCK CONVERTER DESCRIPTION The AP62600 is a 6A, synchronous buck converter with a wide input voltage range of 4.5V to 18V. The device fully integrates a 36m high-side power MOSFET and a 14m low-side power MOSFET to provide high-efficiency step-down DC-DC conversion. The AP62600 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 AP62600 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 high-frequency radiated EMI noise caused by MOSFET switching. The device is available in a V-QFN2030-12 (Type A) package. FEATURES VIN: 4.5V to 18V Output Voltage (VOUT): 0.6V to 7V 6A Continuous Output Current 0.6V � 1% Reference Voltage 360A Quiescent Current Selectable Operation Modes o Pulse Frequency Modulation (PFM) o Ultrasonic Mode (USM) o Pulse Width Modulation (PWM) Selectable Switching Frequency o 400kHz o 800kHz o 1.2MHz Programmable Soft-Start Time Proprietary Gate Driver Design for Best EMI Reduction Power-Good Indicator Precision Enable Threshold to Adjust UVLO Protection Circuitry o Undervoltage Lockout (UVLO) o Cycle-by-Cycle Valley Current Limit o Thermal Shutdown APPLICATIONS 5V and 12V Input Distributed Power Bus Supplies Television Sets and Monitors White Goods and Small Home Appliances FPGA, DSP, and ASIC Supplies Home Audio Network Systems Gaming Consoles Consumer Electronics General Purpose Point of Load AP62600SJ-EVM Document number: DS42003 Rev. 1 - 1 1 of 12 www.diodes.com July 2020 � Diodes Incorporated APPLICATIONS AP62600SJ-EVM 4.5V TO 18V INPUT, 6A SYNCHRONOUS BUCK CONVERTER Figure 1. Typical Application Circuit FUNCTIONAL BLOCK I1 I2 VCC 1.4A 3.7A 20k EN 3 FB 12 SE 0.6V + ISS 5A SS/TR 10 FSEL 5 MODE 4 GND 11 + 1.2V � ON Internal 0.6V Reference UVLO Minimum Off-Time + + SW OCP SQ RQ On-Time Compute VIN One-Shot Thermal Shutdown Mode Select Control Logic VCC Regulator AP62600SJ-EVM Document number: DS42003 Rev. 1 - 1 Figure 2. Functional Block Diagram 2 of 12 www.diodes.com 2 VIN 9 VCC 7 BST Q1 8 SW Q2 6 PG 1 PGND July 2020 � Diodes Incorporated AP62600SJ-EVM 4.5V TO 18V INPUT, 6A SYNCHRONOUS BUCK CONVERTER ABSOLUTE MAXIMUM RATINGS Symbol VIN VCC VEN VMODE VFSEL VPG VBST VSW VSS/TR VFB TST TJ TL ESD Susceptibility HBM CDM Parameter Supply Pin Voltage VCC Pin Voltage Enable/UVLO Pin Voltage MODE Select Pin Voltage Frequency Select Pin Voltage Power-Good Pin Voltage Bootstrap Pin Voltage Switch Pin Voltage Soft-Start/Tracking 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 -0.3V to +6.0 V -0.3V to +6.0 V -0.3V to +6.0 V -0.3V to +6.0 V -0.3V to +6.0 V VSW - 0.3 to VSW + 6.0 V -1.0 to VIN + 0.3 (DC) V -2.5 to VIN + 2.0 (20ns) -0.3V to +6.0 V -0.3V 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 Supply Voltage Output Voltage Operating Ambient Temperature Operating Junction Temperature Min Max Unit 4.5 18.0 V 0.6 7.0 V -40 +85 �C -40 +125 �C AP62600SJ-EVM Document number: DS42003 Rev. 1 - 1 3 of 12 www.diodes.com July 2020 � Diodes Incorporated EVALUATION BOARD AP62600SJ-EVM 4.5V TO 18V INPUT, 6A SYNCHRONOUS BUCK CONVERTER Figure 3. AP62600SJ-EVM AP62600SJ-EVM Document number: DS42003 Rev. 1 - 1 4 of 12 www.diodes.com July 2020 � Diodes Incorporated AP62600SJ-EVM 4.5V TO 18V INPUT, 6A SYNCHRONOUS BUCK CONVERTER QUICK START GUIDE The AP62600SJ-EVM has a simple layout and allows access to the appropriate signals through test points. The board is targeted to be used in providing a simple and convenient evaluation environment for the AP62600. To operate the EVM, set jumpers J1, J2 and J3 to the desired positions per below shown. J1 = EN pin input jumper. For Enable, to enable IC, place a jumper at J1 to "ON" position to connect EN pin to VIN through 100K resistor or leave it OPEN. Jump to "OFF" position to disable IC. J2 = PFM, PWM or USM mode selection. At J2, connect a jumper to PWM to force the device in Pulse Width Modulation (PWM) operation mode. Connect a jumper to PFM to ground the pin to operate the device in Pulse Frequency Modulation (PFM) operation mode without Ultrasonic Mode (USM). Leave J2 OPEN to float the pin to operate the device in PFM with USM mode. J3 = Switching frequency selection. At J3, connect a jumper to GND to set clock frequency to 400kHz. Leave J3 OPEN to float the pin to set clock frequency to 800kHz. Connect a jumper to VCC to set clock frequency to 1.2MHz. To evaluate the performance of the AP62600SJ-EVM, 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. By default, the evaluation board should now power up with a 5.0V output voltage. Frequency is 800kHz. 4. 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. 5. Set the load to 6A 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. AP62600SJ-EVM Document number: DS42003 Rev. 1 - 1 5 of 12 www.diodes.com July 2020 � Diodes Incorporated AP62600SJ-EVM 4.5V TO 18V INPUT, 6A SYNCHRONOUS BUCK CONVERTER APPLICATION INFORMATION Setting the Output Voltage of AP62600 (1) Setting the output voltage The AP62600 features external programmable output voltage by using a resistor divider network R2 and R1 as shown in the typical application circuit. The output voltage is calculated as below, First, select a value for R1 according to the value recommended in the table 1. Then, R3 is determined. The output voltage is given by Table 1 for reference. For accurate output voltage, 1% tolerance is required. Table 1. Resistor selection for output voltage setting Vo R2 R1 1.05V 30 K 22.5 K 1.2V 30 K 30 K 1.5V 30 K 45K 1.8V 30 K 60K 2.5V 30 K 95K 3.3V 30 K 135K 5V 30 K 221 K EXTERNAL COMPONENT SELECTION: 1) Input & output Capacitors (1) For lower output ripple, low ESR is required. (2) Low leakage current needed, X5R/X7R ceramic recommend, multiple capacitor parallel connection. (3) The C1-3 are input capacitors of supply input pin, capacitances is greater than 22uF. (4) The C7 is input capacitors of VCC pin, capacitances are greater than 1uF (5)The C9-11 are output capacitors, recommended in Table 2. 2) Bootstrap Voltage Regulator An external 0.1uF ceramic capacitor is required as bootstrap capacitor between BST and SW pin to work as high side power MOSFET gate driver 3) Soft-start time control capacitor . C6 controls the soft-start time of the output voltage. It can be changed for a shorter or slower ramp up of Vout. The capacitor along with an internal ISS of 5�A, sets the soft-start interval of the converter, TSS, according to equation below: CSS (nF) = 8.33*TSS (ms) 4) Inductor (L) (1) Low DCR for good efficiency (2) Inductance saturate current must higher than the output current (3) The recommended inductance is shown in the table 2 below. AP62600SJ-EVM Document number: DS42003 Rev. 1 - 1 6 of 12 www.diodes.com July 2020 � Diodes Incorporated AP62600SJ-EVM 4.5V TO 18V INPUT, 6A SYNCHRONOUS BUCK CONVERTER Table 2. Recommended inductors and output capacitor Frequency Output Voltage 1.05V 1.2V 1.8V Output Capacitor 88uF 66uF 66uF 400KHz Inductor 3.3uH 3.3uH 3.3uH W�rth PART 7443330330 7443330330 7443330330 Output Capacitor 44uF 66uF 66uF 800 KHz Inductor 1.0uH 1.0uH 1.0uH W�rth PART 7443330100 7443330100 7443330100 Output Capacitor 66uF 66uF 66uF 1.2MHz Inductor 0.47uH 0.47uH 0.68uH W�rth PART 7443330047 7443330047 7443330068 2.5 V 66uF 3.3uH 7443330330 66uF 1.0uH 7443330100 66uF 0.68uH 7443330068 3.3 V 66uF 4.7uH 7443330470 66uF 1.0uH 7443330100 66uF 0.82uH 7443330082 5.0 V 66uF 4.7uH 7443330470 66uF 1.5 uH 7443330150 66uF 1.0 uH 7443330100 EVALUATION BOARD SCHEMATIC Figure 3. AP2600SJ-EVM Schematic AP62600SJ-EVM Document number: DS42003 Rev. 1 - 1 7 of 12 www.diodes.com July 2020 � Diodes Incorporated PCB TOP LAYOUT AP62600SJ-EVM 4.5V TO 18V INPUT, 6A SYNCHRONOUS BUCK CONVERTER PCB BOTTOM LAYOUT Figure 4. AP62600SJ-EVM � Top Layer AP62600SJ-EVM Document number: DS42003 Rev. 1 - 1 Figure 5. AP62600SJ-EVM � Bottom Layer 8 of 12 www.diodes.com July 2020 � Diodes Incorporated AP62600SJ-EVM 4.5V TO 18V INPUT, 6A SYNCHRONOUS BUCK CONVERTER BILL OF MATERIALS for AP62600SJ-EVM for VOUT=5V Ref Value C1, C9, C10, C11 22�F C4, C5 0.1�F C6 47nF C7 1�F L1 1.5�H R1 221K R2 30K R3 10K Description Qty Size Vendor Manufacturer PN Ceramic Capacitor, 25V, X6S Ceramic Capacitor, 50V, X7R, 10% Ceramic Capacitor, 50V, X7R, 10% Ceramic Capacitor, 25V, X7R, 10% DCR=2.5m, Ir=18A RES SMD 1% RES SMD 1% RES SMD 1% 4 1206 Samsung CL31X226KAHN3NE 2 0603 Wurth Electronics 885012206095 1 0603 Wurth Electronics 885012206093 1 0603 Wurth Electronics 885012206076 10.9x10x Wurth 1 9.7mm Electronics 7443330150 1 0603 Yageo RC0603FR-07221KL 1 0603 Yageo RC0603FR-0730KL 1 0603 Yageo RC0603FR-0710KL PCB Layer Top Top Top Top Top Top Top Top R4 0 RES SMD 1% 1 0603 Vishay MCT06030Z0000ZP500 Top R5 100K RES SMD 1% 1 0603 Yageo RC0603FR-07100KL Top J1, J2, PCB Header, J3 40 POS 3 1X3 3M 2340-6111TG Top JH6, Terminal JH7, JH8, 1598 Turret Triple 0.094" L (Test 4 ThroughHole Keystone Electronics 1598-2 JH9 Points) Top 6A Sync DC/DC QFN2030- U1 AP62600 Converter 1 12 Diodes Inc AP62600SJ Top AP62600SJ-EVM Document number: DS42003 Rev. 1 - 1 9 of 12 www.diodes.com July 2020 � Diodes Incorporated AP62600SJ-EVM 4.5V TO 18V INPUT, 6A SYNCHRONOUS BUCK CONVERTER TYPICAL PERFORMANCE CHARACTERISTICS Efficiency (%) 100 90 80 70 60 50 40 30 20 10 0 0.001 PFM USM PWM 0.010 0.100 IOUT (A) 1.000 10.000 Figure 6. Efficiency vs. Output Current, VIN = 12V, VOUT = 5V, L = 1.5H, fSW = 800kHz 100 90 80 70 60 50 40 30 20 10 0 0.001 PFM USM PWM 0.010 0.100 IOUT (A) 1.000 10.000 Figure 7. Efficiency vs. Output Current, VIN = 12V, VOUT = 3.3V, L = 1.2H, fSW = 800kHz Efficiency (%) AP62600SJ-EVM Document number: DS42003 Rev. 1 - 1 0 of 12 www.diodes.com July 2020 � Diodes Incorporated VOUT (50mV/div) IL (2A/div) AP62600SJ-EVM 4.5V TO 18V INPUT, 6A SYNCHRONOUS BUCK CONVERTER VOUT (20mV/div) IL (2A/div) VSW (10V/div) 20s/div Figure 8. Output Voltage Ripple, IOUT = 50mA VIN = 12V, VOUT = 5V PFM fSW = 800kHz VSW (10V/div) 2s/div Figure 9. Output Voltage Ripple, IOUT = 6A VIN = 12V, VOUT = 5V PFM fSW = 800kHz VOUT (50mV/div) IL (2A/div) VOUT (20mV/div) IL (2A/div) VSW (10V/div) VSW (10V/div) 20s/div Figure 10. Output Voltage Ripple, IOUT = 50mA VIN = 12V, VOUT = 5V USM fSW = 800kHz 2s/div Figure 11. Output Voltage Ripple, IOUT = 6A VIN = 12V, VOUT = 5V USM fSW = 800kHz VOUT (20mV/div) IL (2A/div) VOUT (20mV/div) IL (2A/div) VSW (10V/div) VSW (10V/div) 2s/div 2s/div Figure 12. Output Voltage Ripple, IOUT = 50mA VIN = 12V, VOUT = 5V PWM fSW = 800kHz Figure 13. Output Voltage Ripple, IOUT = 6A VIN = 12V, VOUT = 5V PWM fSW = 800kHz AP62600SJ-EVM Document number: DS42003 Rev. 1 - 1 1 of 12 www.diodes.com July 2020 � Diodes Incorporated AP62600SJ-EVM 4.5V TO 18V INPUT, 6A SYNCHRONOUS BUCK CONVERTER 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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