DIODES AP62200TWU-EVM 18V 2A Low Iq COT Synchronous DC-DC Buck Converter User Manual
- June 13, 2024
- DIODES
Table of Contents
DIODES AP62200TWU-EVM 18V 2A Low Iq COT Synchronous DC-DC Buck Converter
Product Information:
- Product Name: AP62200TWU-EVM
- Type: Synchronous DC-DC Buck Converter
- Input Voltage Range: 4.2V to 18V
- Output Current: 2A
- Control Method: Constant On-Time (COT)
Package: TSOT26
Features:
- High-efficiency step-down DC-DC conversion
- Fast transient response – Easy loop stabilization
- Low output voltage ripple
- EMI reduction
- Undervoltage Lockout (UVLO)
- Cycle-by-Cycle Valley Current Limit
- Thermal Shutdown
Applications:
- Flat Screen TV Sets and Monitors
- Set Top Boxes
- Consumer Electronics
- Network Systems
- General Purpose Point of Load
Product Usage Instructions:
- Setting Output Voltage: – Refer to Table 1 for component selections for common output voltages. – Choose the appropriate resistors R1 and R2 based on the desired output voltage. – Choose the inductor L1 based on the recommended values.
- Evaluation
Board Setup: – Connect a power supply to the input terminals VIN and GND. Set VIN to 12V. – Connect the positive terminal of the electronic load to VOUT and the negative terminal to GND. – For Enable, place a jumper at JH8 to the ON position to connect the EN pin to VIN through a 100K resistor to enable the IC. Leave it OPEN to disable the IC. Note: Refer to the user manual for more detailed instructions, safety precautions, and additional information about the product.
DESCRIPTION
The AP62200T is a 2A, synchronous buck converter with a wide input voltage
range of 4.2V to 18V. The device fully integrates a 90mΩ high-side power
MOSFET and a 65mΩ low-side power MOSFET to provide high-efficiency step-down
DC-DC conversion.
The AP62200T 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 AP62200T 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.
AP62200T is available in a TSOT26 package.
FEATURES
- VIN Range: 4.2V -18V
- Output Voltage range: 0.8V to 7V
- 2A Continuous Output Current
- 0.7625V ± 1% Reference Voltage (TA = +25°C) => AP62200T
- 135μA Low Quiescent Current
- 740kHz Switching Frequency
- Proprietary Gate Driver Design for Best EMI Reduction
- Protection Circuitry
- Undervoltage Lockout (UVLO)
- Cycle-by-Cycle Valley Current Limit
- Thermal Shutdown
- Totally Lead-Free & Fully RoHS Compliant
- Halogen and Antimony Free. “Green” Device
APPLICATIONS
- Flat Screen TV Sets and Monitors
- Set Top Boxes
- Consumer Electronics
- Network Systems
- General Purpose Point of Load
TYPICAL APPLICATIONS CIRCUIT
ABSOLUTE MAXIMUM RATINGS
Symbol | Parameter | Rating | Unit |
---|---|---|---|
VIN | Supply Pin Voltage | -0.3 to +20.0 (DC) | V |
-0.3 to 22.0 (400ms)
VSW| Switch Pin Voltage| -1.0 to VIN + 0.3 (DC)| V
-2.5 to VIN + 2.0 (20ns)
VBST| Bootstrap Pin Voltage| VSW – 0.3 to VSW + 6.0| V
VEN| Enable/UVLO Pin Voltage| -0.3 to +6.0| V
VFB| Feedback Pin Voltage| -0.3 to +6.0| V
TST| Storage Temperature| -65 to +150| °C
TJ| Junction Temperature| +150| °C
TL| Lead Temperature| +260| °C
ESD Susceptibility
HBM| Human Body Mode| 2000| V
CDM| Charge Device Model| 500| V
RECOMMENDED OPERATING CONDITIONS
Symbol | Parameter | Rating | Unit |
---|---|---|---|
VIN | Supply Voltage | 4.2 to 18 | V |
VOUT | Output Voltage Range | 0.8 to 7 | V |
TA | Operating Ambient Temperature | **** |
-40 to +85
| °C
TJ| Operating Junction Temperature| ****
-40 to +125
| °C
SETTING OUTPUT VOLTAGE
Table 1 for AP62200T shows a list of recommended component selections for common output voltages.
Table 1. Common Output Voltages (AP62200T)
VOUT | R1 | R2 | L1 |
---|---|---|---|
1.0V | 3.09KΩ | 10KΩ | 1.5µH |
1.2V | 5.76KΩ | 10KΩ | 2.2µH |
1.5V | 9.76KΩ | 10KΩ | 2.2µH |
1.8V | 13.7KΩ | 10KΩ | 3.3µH |
2.5V | 22.6KΩ | 10KΩ | 3.3µH |
3.3V | 33.2KΩ | 10KΩ | 3.3µH |
5.0V | 56.2KΩ | 10KΩ | 4.7µH |
EVALUATION BOARD
QUICK START GUIDE
The AP62200TWU-EVM has a simple layout and allows access to the appropriate signals through test points. To evaluate the performance of the AP62200TWU, follow the procedure below:
- Connect a power supply to the input terminals VIN and GND. Set VIN to 12V.
- Connect the positive terminal of the electronic load to VOUT and negative terminal to GND.
- For Enable, place a jumper at JH8 to “ON” position to connect EN pin to VIN through 100KΩ resistor to enable IC or leave it OPEN. Jump to “OFF” position to disable IC.
- The evaluation board should now power up with a 5.0V output voltage.
- 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.
- 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:
- 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.
- 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.
EVALUATION BOARD SCHEMATIC
PCB TOP LAYOUT
PCB BOTTOM LAYOUT
BILL OF MATERIALS for AP62200TWU-EVM for VOUT=5V
Ref| Value| Description| Qty| Size| Vendor Name|
Manufacturer PN
---|---|---|---|---|---|---
C1
| ****
10µF
| Ceramic Capacitor,
25V, X5R
| ****
1
| ****
1210
| ****
Murata
| ****
GRM32DR61E106KA12L
C2, C3
| ****
22µF
| Ceramic Capacitor, 25V, X5R| ****
2
| ****
1210
| ****
AVX
| ****
12103D226KAT2A
C4, C6
| ****
0.1µF
| Ceramic Capacitor,
50V, X7R, 10%
| ****
2
| ****
0603
| ****
Samsung
| ****
GCJ188R71H104KA12D
L1
| ****
4.7µH
| DCR=19.5mΩ, Ir=6.2A| ****
1
| 10.2X10.
2×4.5mm
| Wurth Electronics| ****
744779747
R1| 56.2KΩ| SMD Resistor, 1%| 1| 0603| Panasonic| ERJ-3EKF5622V
R2| 10KΩ| SMD Resistor, 1%| 1| 0603| Panasonic| ERJ-3EKF1002V
R3| 0Ω| SMD Resistor, 1%| 1| 0603| Panasonic| ERJ-3GEY0R00V
R4
| ****
100KΩ
| ****
SMD Resistor, 1%
| ****
1
| ****
0603
| ****
Panasonic
| ****
ERJ-3EKF1003V
JH4, JH5, JH6,
JH7
| ****
1598
| ****
Terminal Turret Triple 0.094″ L
(Test Points)
| ****
4
| ****
Through- Hole
| ****
Keystone Circuit
| ****
1598-2
JH8
| | PCB Header, 40
POS
| ****
1
| ****
1X3
| ****
3M
| ****
2340-6111TG
U1
| ****
AP62200T
| Sync Buck DC/DC converter| ****
1
| ****
TSOT26
| ****
Diodes Inc
| ****
AP62200TWU-7
TYPICAL PERFORMANCE CHARACTERISTICS
IMPORTANT NOTICE
- 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).
- 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 application 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. Diodes’ products may be used to facilitate safety-related applications; however, in all instances customers and users are responsible for (a) selecting the appropriate Diodes products for their applications, (b) evaluating the suitability of Diodes’ products for their intended applications, (c) ensuring their applications, which incorporate Diodes’ products, comply the applicable legal and regulatory requirements as well as safety and functional-safety related standards, and (d) ensuring they design with appropriate safeguards (including testing, validation, quality control techniques, redundancy, malfunction prevention, and appropriate treatment for aging degradation) to minimize the risks associated with their applications.
- Diodes assumes no liability for any application-related information, support, assistance or feedback that may be provided by Diodes from time to time. Any customer or user of this document or products described herein will assume all risks and liabilities associated with such use, and will hold Diodes and all companies whose products are represented herein or on Diodes’ websites, harmless against all damages and liabilities.
- Products described herein may be covered by one or more United States, international or foreign patents and pending patent applications. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks and trademark applications. Diodes does not convey any license under any of its intellectual property rights or the rights of any third parties (including third parties whose products and services may be described in this document or on Diodes’ website) under this document.
- Diodes’ products are provided subject to Diodes’ Standard Terms and Conditions of Sale (https://www.diodes.com/about/company/terms-and-conditions/terms-and-conditions-of-sales/) or other applicable terms. This document does not alter or expand the applicable warranties provided by Diodes. Diodes does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
- Diodes’ products and technology may not be used for or incorporated into any products or systems whose manufacture, use or sale is prohibited under any applicable laws and regulations. Should customers or users use Diodes’ products in contravention of any applicable laws or regulations, or for any unintended or unauthorized application, customers and users will (a) be solely responsible for any damages, losses or penalties arising in connection therewith or as a result thereof, and (b) indemnify and hold Diodes and its representatives and agents harmless against any and all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim relating to any noncompliance with the applicable laws and regulations, as well as any unintended or unauthorized application.
- While efforts have been made to ensure the information contained in this document is accurate, complete and current, it may contain technical inaccuracies, omissions and typographical errors. Diodes does not warrant that information contained in this document is error-free and Diodes is under no obligation to update or otherwise correct this information. Notwithstanding the foregoing, Diodes reserves the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes.
- Any unauthorized copying, modification, distribution, transmission, display or other use of this document (or any portion hereof) is prohibited. Diodes assumes no responsibility for any losses incurred by the customers or users or any third parties arising from any such unauthorized use.
- This Notice may be periodically updated with the most recent version available at https://www.diodes.com/about/company/terms-and-conditions/important-notice
The Diodes logo is a registered trademark of Diodes Incorporated in the United
States and other countries.
DIODES is a trademark of Diodes Incorporated in the United States and other
countries.
All other trademarks are the property of their respective owners. © 2023
Diodes Incorporated. All Rights Reserved.
www.diodes.com
18%, ZA, Low l9, COT Synchronous DC-DC Buck Converter
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>