Product Overview

CXSD62667 is a high-performance synchronous buck DC-DC converter designed for industrial and automotive electronics fields. It integrates a 120KHz fixed frequency control architecture and supports a wide input voltage range of 5-45V. It can output precise voltages of 1.25-40V, with a maximum continuous current of 6A and an output power of up to 60W. The conversion efficiency exceeds 96%. Built in constant voltage (CV) and constant current (CC) dual loop control, combined with fully integrated compensation module, significantly reduces the number of peripheral components, lowers system costs, and saves 70% PCB space.

   Product Features;XOI嘉泰姆

Core Technology Highlights

High efficiency power managementXOI嘉泰姆

• 120KHz fixed switching frequencyAutomatic frequency reduction to 30KHz protection during short circuit
• Dual mode control: Constant voltage/constant current dual loop adaptive adjustment, precision± 2%
• Built in synchronous rectification MOSFET, supporting 100% duty cycle continuous output

Multiple industrial grade protectionsXOI嘉泰姆

• Triple safety protection: overcurrent/short circuit/overheating protection (wide temperature range of -40 ℃~125 ℃)
• Class 3A ESD protection (HBM 16kV), anti-interference ability increased by 50%
• Intelligent current limiting function, supporting dynamic load surge protection

Industrial and automotive grade reliabilityXOI嘉泰姆

• AEC-Q100 Grade 1 certification (-40 ℃~125 ℃)
• TO263-7L package optimized heat dissipation design, with a junction temperature tolerance of up to 150 ℃
• Supports 12V/24V/48V battery system, compatible with car electronics and industrial power supplyXOI嘉泰姆
   

differentiated advantage

• High current and high power6A continuous output capability, meeting the demand for 60W high-density power supply
• Automotive grade reliabilityPassed AEC-Q100 certification to adapt to vehicle vibration and temperature shock
• Intelligent dual loop controlConstant voltage and constant current adaptive switching, suitable for battery charging and motor driving scenarios

CXSD62667, with its high integration and industrial grade protection design, provides efficient and stable solutions for power systems in harsh environments, significantly reducing the complexity and BOM cost of power development for vehicles/industrial equipment.XOI嘉泰姆

   Application scope;XOI嘉泰姆

✔& nbsp;Automotive ElectronicsIn car infotainment system, ADAS module, BMS power managementXOI嘉泰姆
✔& nbsp;industrial control：PLC、 Servo drives, power supply for industrial robotsXOI嘉泰姆
✔& nbsp;communication equipment5G base station, optical module, POE switchXOI嘉泰姆
✔& nbsp;Internet of Things: edge computing gateway, high power sensor nodeXOI嘉泰姆

   Technical Specifications (Product PDF);XOI嘉泰姆

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

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   Product packaging diagram;XOI嘉泰姆

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   Circuit schematic diagram;XOI嘉泰姆

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Bill of MaterialsXOI嘉泰姆
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DEMO physical imageXOI嘉泰姆
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PCB layoutXOI嘉泰姆
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PCB wiring rulesXOI嘉泰姆
1. Shorten the discontinuous current circuit: The positive pole of the input electrolytic capacitor should be close to the VIN pin of the chip, and the negative pole of the input electrolytic capacitor should be close to the VIN pin of the chipXOI嘉泰姆
Near the GND pin of the chip to further reduce its parasitic inductance, minimize glitch voltage, and improve system stability;XOI嘉泰姆

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Shorten the switch current circuitXOI嘉泰姆

2. The ceramic capacitor at the input end is used to filter out high-frequency voltage spikes and provide pure power to the internal logic circuit of the chip,XOI嘉泰姆
  Ceramic capacitors are located near the VIN and GND pins of the chip;XOI嘉泰姆
3. Power lines such as VIN, SW, VOUT, GND, etc. should be treated with copper plating as much as possible to achieve thickness, length, and straightness;XOI嘉泰姆
4. FB feedback wiring should be kept away from inductor, SW and other switch signal nodes, and preferably surrounded by GND wiring.XOI嘉泰姆

    Application InformationXOI嘉泰姆
      Input capacitor selection;XOI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. To prevent large transient voltages,XOI嘉泰姆
Low ESR (equivalent series resistance) input capacitors must be selected for maximum RMS current requirements. For most applications, 1XOI嘉泰姆
A 220uF input capacitor is sufficient, and its placement should be as close to the chip as possible. Maximum RMS capacitor currentXOI嘉泰姆
Given by the following equation:XOI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.XOI嘉泰姆
When ceramic capacitors are not used, it is recommended to add a 0.1uF to 1uF ceramic capacitor to the input capacitor for high-frequency decoupling.XOI嘉泰姆
Output capacitor selection;XOI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. The ESR of any capacitor, along with its own capacity, will create a zero point for the system. The larger the ESR value, the lower the frequency range where the zero point is located. Ceramic capacitors, on the other hand, have a zero point at a higher frequency, which can usually be ignored and is a better choice. However, compared to electrolytic capacitors, large capacity and high voltage ceramic capacitors have a larger volume and higher cost. Therefore, using ceramic capacitors with a capacitance of 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:XOI嘉泰姆

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F in the formula: switching frequency, COUP: output capacitor, △ IL: ripple current in the inductor.XOI嘉泰姆
Inductance selection;XOI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 and 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 switch current limit. 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:XOI嘉泰姆
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Typical characteristics                       XOI嘉泰姆

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