DIODES AP64100QSP-EVM Synchronous DC-DC Buck Converter User Manual
- June 16, 2024
- DIODES
Table of Contents
- DIODES AP64100QSP-EVM Synchronous DC-DC Buck Converter
- Product Information
- Product Usage Instructions
- DESCRIPTION
- FEATURES
- APPLICATIONS
- RECOMMENDED OPERATING CONDITIONS
- EVALUATION BOARD
- QUICK START GUIDE
- PCB TOP LAYOUT
- TYPICAL PERFORMANCE CHARACTERISTICS
- IMPORTANT NOTICE
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
DIODES AP64100QSP-EVM Synchronous DC-DC Buck Converter
Product Information
Specifications
- Model: AP64100QSP-EVM
- Input Voltage Range: 3.8V to 40V
- Output Current: 1A
- Operating Ambient Temperature Range: -40°C to +125°C
- Operating Junction Temperature Range: -40°C to +150°C
- Package: SO-8EP
Description
The AP64100QSP-EVM is a 40V, 1A, low IQ, synchronous DC-DC buck converter with programmable frequency. It is designed for automotive applications and features a wide input voltage range of 3.8V to 40V. The device integrates a high-side power MOSFET and a low-side power MOSFET for high-efficiency step- down DC-DC conversion. It adopts peak current mode control to minimize external component count and optimize electromagnetic interference (EMI) reduction.
Features
- Adjustable Switching Frequency: 100kHz to 2.2MHz
- External Clock Synchronization: 100kHz to 2.2MHz
- Up to 88% Efficiency at 5mA Light Load
- Proprietary Gate Driver Design for Best EMI Reduction
- Frequency Spread Spectrum (FSS) to Reduce EMI
- Low-Dropout (LDO) Mode
- Precision Enable Threshold to adjust UVLO Protection Circuitry
- Totally Lead-Free & Fully RoHS Compliant
- Halogen and Antimony Free. Green Device
Applications
- Automotive Power Systems
- Automotive Infotainment
- Automotive Instrument Clusters
- Automotive Telematics
- Automotive Lighting Control
- Advanced Driver Assistance Systems
Recommended Operating Conditions
- Supply Voltage (VIN): 3.8V to 40V
- Output Voltage (VOUT): 0.8V to 39V
- Operating Ambient Temperature Range (TA): -40°C to +125°C
- Operating Junction Temperature Range (TJ): -40°C to +150°C
Evaluation Board
The AP64100QSP-EVM evaluation board provides easy access to the necessary
signals through test points. It is designed to evaluate the performance of the
AP64100QSP.
Product Usage Instructions
Quick Start Guide
To evaluate the performance of the AP64100QSP, follow the steps 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 the negative terminal to GND.
- For Enable, to enable the IC, place a jumper at JH6 to the ON position to connect the EN pin to VIN through a 100K resistor. Alternatively, leave it OPEN to disable the IC.
- The evaluation board should now power up with a 5.0V output voltage.
Frequently Asked Questions (FAQ)
-
Q: What is the input voltage range of the AP64100QSP-EVM?
A: The input voltage range of the AP64100QSP-EVM is 3.8V to 40V. -
Q: What is the maximum output current of the AP64100QSP-EVM?
A: The AP64100QSP-EVM can provide a maximum output current of 1A. -
Q: What is the operating temperature range of the AP64100QSP-EVM?
A: The AP64100QSP-EVM can operate in an ambient temperature range of -40°C to +125°C and a junction temperature range of -40°C to +150°C.
DESCRIPTION
AP64100Q is an automotive-compliant, 1A, synchronous buck converter with a wide input voltage range of 3.8V to 40V. The device fully integrates a 150mΩ high-side power MOSFET and an 80mΩ low-side power MOSFET to provide high- efficiency step-down DC-DC conversion. The AP64100Q device is easily used by minimizing the external component count due to its adoption of peak current mode control. The AP64100Q 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 AP64100Q also features Frequency Spread Spectrum (FSS) 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. The device is available in a SO-8EP package.
FEATURES
- AEC-Q100 Qualified for Automotive Applications
- Device Temperature Grade 1: -40°C to +125°C TA Range
- VIN: 3.8V to 40V
- Output Voltage (VOUT): 0.8V to VIN
- 1A Continuous Output Current
- 0.8V ±1% Reference Voltage
- 22µA Ultralow Quiescent Current (Pulse Frequency Modulation)
- Adjustable Switching Frequency: 100kHz to 2.2MHz
- External Clock Synchronization: 100kHz to 2.2MHz
- External Clock Synchronization: 100kHz to 2.2MHz
- Up to 88% Efficiency at 5mA Light Load
- Proprietary Gate Driver Design for Best EMI Reduction
- Frequency Spread Spectrum (FSS) to Reduce EMI
- Low-Dropout (LDO) Mode
- Precision Enable Threshold to adjust UVLO
- Protection Circuitry
- Undervoltage Lockout (UVLO)
- Output Overvoltage Protection (OVP)
- Cycle-by-Cycle Peak Current Limit
- Thermal Shutdown
- Totally Lead-Free & Fully RoHS Compliant
- Halogen and Antimony Free. “Green” Device
APPLICATIONS
- Automotive Power Systems
- Automotive Infotainment
- Automotive Instrument Clusters
- Automotive Telematics
- Automotive Lighting Control
- Advanced Driver Assistance Systems
ABSOLUTE MAXIMUM RATINGS
| Symbol | Parameter | Rating | Unit |
|---|---|---|---|
| VIN | Supply Pin Voltage | -0.3 to +42.0 (DC) | V |
-0.3 to +45.0 (400ms)
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| -0.3 to VIN + 0.3 (DC)| V
-2.5 to VIN + 2.0 (20ns)
TJ| Junction Temperature| +160| °C
TL| Lead Temperature| +260| °C
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 | +125 | °C |
| TJ | Operating Junction Temperature Range | -40 | +150 | °C |
EVALUATION BOARD
QUICK START GUIDE
The AP64100QSP-EVM has a simple layout and allows access to the appropriate signals through test points. To evaluate the performance of the AP64100QSP, 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, to enable IC, place a jumper at JH6 to “ON” position to connect EN pin to VIN through 100KΩ resistor 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 1A 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.
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|
C10
---|---|---|---|---|---|---|---|---
1.2V| 4.99KΩ| 10KΩ| 6.8µH| 1.69KΩ| 10nF| 2×10µF| 22µF| OPEN
1.5V| 8.66KΩ| 10KΩ| 8.2µH| 2.10KΩ| 10nF| 2×10µF| 22µF| OPEN
1.8V| 12.4KΩ| 10KΩ| 10µH| 2.55KΩ| 10nF| 2×10µF| 22µF| OPEN
2.5V| 21.5KΩ| 10KΩ| 10µH| 3.48KΩ| 10nF| 2×10µF| 22µF| OPEN
3.3V| 31.6KΩ| 10KΩ| 15µH| 4.64KΩ| 10nF| 2×10µF| 22µF| OPEN
5.0V| 52.3KΩ| 10KΩ| 15µH| 6.98KΩ| 10nF| 2×10µF| 22µF| OPEN
12V| 140KΩ| 10KΩ| 33µH| 11.3KΩ| 10nF| 2×10µF| 22µF| OPEN
EVALUATION BOARD SCHEMATIC
PCB TOP LAYOUT
PCB BOTTOM LAYOUT
BILL OF MATERIALS for AP64100QSP-EVM for VOUT=5V
Ref| Value| Description| Qty| Size| Vendor Name|
Manufacturer PN
---|---|---|---|---|---|---
C1, C2| 10µF| Ceramic Capacitor, 50V| 2| 1206| TDK| CGA5L1X7R1H106K160 AC
C3, C4, C9| 0.1µF| Ceramic Capacitor, 50V| 3| 0603| TDK| CGA3E3X8R1H104K08 0AB
C5| 22µF| Ceramic Capacitor, 16V| 1| 1210| TDK| CGA6P1X8L1C226M25 0AC
C7| 10nF| Ceramic Capacitor, 50V| 1| 0603| TDK| C1608NP01H103J080A A
R1| 52.3KΩ| SMD Resistor, 1%| 1| 0603| Panasonic| ERJ-3EKF5232V
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
R6| 200KΩ| SMD Resistor, 1%| 1| 0603| Panasonic| ERJ-S03F2003V
R7| 6.98KΩ| RES SMD 1% 1/10W| 1| 0603| Panasonic| ERJ-3EKF6981V
L1| 15µH| DCR=69.5mΩ, Ir=2.2A| 1| 7.4x
7.3x
4.5mm
| Wurth Electronics| 7447773150
JH6| | PCB Header, 36 POS| 1| 1X3| Amphenol| 78511-136HLF
VIN, VOUT, GNDx2| 1598| Terminal Turret Triple 0.094″ L (Test Points)| 4| Thu-
Hole| Keystone Electronics| 1598-2
U1| AP64100Q| Sync DC-DC Converter| 1| SO- 8EP| Diodes Incorporated (Diodes)|
AP64100QSP
TYPICAL PERFORMANCE CHARACTERISTICS
IMPORTANT NOTICE
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