Product Overview

                Analysis of CXSD62661 High Efficiency Synchronous Rectification and Voltage Reduction Converter Technology. As a new generation of intelligent power solution, CXSD62661 Synchronous Rectification and Voltage Reduction DC-DC Switching Converter relies on its;4Um嘉泰姆
          Excellent performance brings innovative experiences to the fields of industrial control and automotive electronics. This device adopts advanced 120kHz constant frequency PWM control technology and can operate within a wide voltage input range of 5V to 40V4Um嘉泰姆
          With a conversion efficiency of up to 95% and a maximum output current of 4A, it perfectly supports 30W power output requirements.4Um嘉泰姆

   Product Features;4Um嘉泰姆

Core advantages and highlights:4Um嘉泰姆

✓ Wide voltage adaptation: 1.25-35V precise adjustable output, suitable for various device needs4Um嘉泰姆
✓ Full load efficient operation: patented synchronous rectification architecture achieves 95%+conversion efficiency4Um嘉泰姆
✓ Military grade reliability: -40 ℃~125 ℃ wide temperature range operation, in compliance with Class3A ESD protection standards4Um嘉泰姆
✓ Intelligent protection mechanism: Triple protection system (overheat shutdown/dynamic current limiting/short circuit frequency reduction) ensures equipment safety4Um嘉泰姆
✓ Compact design: Integrated MOSFET+compensation circuit, TO252-5L package saves 70% PCB space4Um嘉泰姆

Technological innovation characteristics:4Um嘉泰姆

• 100% maximum duty cycle output capability to ensure stability of low voltage differential operation4Um嘉泰姆
• ± 2% high-precision voltage reference to improve system control accuracy4Um嘉泰姆
• Intelligent frequency switching technology (120kHz→ 30kHz) to deal with short circuit anomalies4Um嘉泰姆
• Optimize thermal management design to effectively reduce system temperature rise4Um嘉泰姆

   Application scope;4Um嘉泰姆

Industry application scenarios:4Um嘉泰姆

▶ New energy vehicles: onboard electronic systems, BMS power management4Um嘉泰姆
▶ Industrial automation: PLC controller, mechanical arm drive power supply4Um嘉泰姆
▶ Communication infrastructure: 5G base station equipment, fiber optic transmission modules4Um嘉泰姆
▶ Intelligent IoT: edge computing terminal, remote monitoring equipment4Um嘉泰姆

This converter significantly reduces BOM costs through integrated design, and its excellent linear/load adjustment rate (<1%) combined with multiple protection mechanisms provides reliable protection for equipment operation in harsh environments, making it an ideal choice for engineers to create efficient and compact power systems.4Um嘉泰姆

   Technical Specifications (Product PDF);4Um嘉泰姆

      For detailed PDF specifications, please scan WeChat to contact us. You can also receive free samples and technical support！4Um嘉泰姆

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   Product packaging diagram;4Um嘉泰姆

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   Circuit schematic diagram;4Um嘉泰姆

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Bill of Materials4Um嘉泰姆

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DEMO physical image4Um嘉泰姆

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          PCB layout4Um嘉泰姆

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        Typical performance parameters4Um嘉泰姆

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     Application Information 4Um嘉泰姆

Input capacitor selection;4Um嘉泰姆
       In continuous mode, the input current of the converter is a set of square waves with a duty cycle of approximately VOUT/VIN. In order to prevent large transient voltages, it is necessary to adopt a maximum4Um嘉泰姆
Choose a low ESR (equivalent series resistance) input capacitor for RMS current requirements. For most applications, a 100uF input capacitor is sufficient4Um嘉泰姆
Place it as close as possible to the position of CXSD62661. The maximum RMS capacitor current is given by the following equation:4Um嘉泰姆
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Among them, the maximum average output current IMAX is equal to the difference between the peak current and 1/2 of the peak ripple current, that is, IMAX=ILIM - △ IL/2. Without using ceramic electricity4Um嘉泰姆
When using a container, it is also recommended to add a 0.1uF to 1uF ceramic capacitor to the input capacitor for high-frequency decoupling.4Um嘉泰姆
Output capacitor selection;4Um嘉泰姆
    Low ESR capacitors should be selected at the output end to reduce output ripple voltage. Generally speaking, once the ESR of the capacitor is met, the capacitor is sufficient to meet the demand. any4Um嘉泰姆
The ESR of a capacitor, along with its own capacity, will generate a zero point for the system. The larger the ESR value, the lower the frequency range where the zero point is located, while the zero point of a ceramic capacitor is located at a certain frequency4Um嘉泰姆
At higher frequencies, it can usually be ignored and is a good choice, but compared to electrolytic capacitors, high-capacity and high-voltage ceramic capacitors have larger volumes and higher costs,4Um嘉泰姆
Therefore, using ceramic capacitors ranging from 0.1uF to 1uF in combination with low ESR electrolytic capacitors is a good choice. The output voltage ripple is determined by the following equation:4Um嘉泰姆
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F in the formula: switching frequency, COUP: output capacitor, △ IL: ripple current in the inductor.4Um嘉泰姆
Inductance selection;4Um嘉泰姆
      Although inductors do not affect the operating frequency, the inductance value has a direct impact on the ripple current. The inductance ripple current △ IL decreases with the increase of inductance value,4Um嘉泰姆
And it increases with the increase of VIN and VOUT. A reasonable starting point for setting ripple current is △ IL=0.3 * ILIM, where ILIM is the peak switching current4Um嘉泰姆
Limit value. In order to ensure that the ripple current is below a specified maximum value, the inductance value should be selected according to the following formula: 4Um嘉泰姆
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    PCB Layout Guide4Um嘉泰姆

1. Power lines such as VIN, GND, SW, VOUT, etc., thick, short, and straight;4Um嘉泰姆
2. FB wiring should be kept away from switch signals such as inductors, and it is recommended to use a ground wire to surround it;4Um嘉泰姆
3. The positive pole of the input capacitor is close to the VIN pin of the chip, and the negative pole of the input capacitor is close to the GND pin of the chip.4Um嘉泰姆

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