Product Overview

CXSD62665 is a synchronous buck DC-DC converter designed for high-power industrial and automotive scenarios, integrating 120KHz fixed frequency control technology, supporting 5-45V ultra wide input voltage, outputting 1.25-40V adjustable voltage, maximum continuous current of 6A, output power of 80W, and efficiency exceeding 96%. Built in full compensation module simplifies circuit design, reduces peripheral components by 40%, saves PCB space and reduces system costs, and adapts to high power density power supply requirements.

   Product Features;hdA嘉泰姆

Core Technology Highlights

High power power supply managementhdA嘉泰姆

• 120KHz fixed switching frequencyIntelligent frequency reduction to 30KHz protection during short circuit
• Full load efficiency>95%Support continuous output with 100% duty cycle
• Built in synchronous rectification MOSFET, transient response time<10μ s

Multiple industrial grade protectionshdA嘉泰姆

• Triple protection mechanism: overcurrent/short circuit/overheating protection (-40 ℃~125 ℃)
• Class 3A ESD protection (HBM 16kV), surge resistance increased by 50%
• Dynamic current limiting function, suitable for sudden load changes such as motor start stop

High reliability packaging designhdA嘉泰姆

• TO220-5L packageImprove heat dissipation efficiency by 30% and support continuous output of 80W
• Passed AEC-Q100 Grade 1 certification, able to withstand a junction temperature of 150 ℃
• Compatible with 12V/24V/48V battery systems to meet harsh environments in both automotive and industrial settings

differentiated advantage

1. 80W high power output6A continuous current capability, meeting the power supply needs of high-power equipmenthdA嘉泰姆

2. Enhanced heat dissipation designTO220-5L package with copper substrate, better heat dissipation performance than conventional SMD packagehdA嘉泰姆

3. Automotive grade anti-interferenceAdapt to complex electromagnetic environments in vehicles through ISO 7637-2 pulse testinghdA嘉泰姆

CXSD62665, with its high power density and industrial grade protection, provides efficient and reliable power solutions for scenarios such as new energy vehicles and industrial automation, helping equipment operate stably under extreme conditions.hdA嘉泰姆

   Application scope;hdA嘉泰姆

✔& nbsp;Automotive ElectronicsElectric vehicle OBC (on-board charger), DC-DC conversion module, BMS systemhdA嘉泰姆
✔& nbsp;industrial control: Servo drives, laser equipment, industrial robot power supplyhdA嘉泰姆
✔& nbsp;communication base station5G macro station RRU, optical communication module, POE++power supplyhdA嘉泰姆
✔& nbsp;Internet of ThingsEdge servers, high-density sensor clustershdA嘉泰姆

   Technical Specifications (Product PDF);hdA嘉泰姆

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

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   Product packaging diagram;hdA嘉泰姆

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   Circuit schematic diagram;hdA嘉泰姆

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Bill of MaterialshdA嘉泰姆

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DEMO physical imagehdA嘉泰姆

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PCB layouthdA嘉泰姆

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PCB wiring ruleshdA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 GND pin of the chip to further reduce its parasitic inductance, reduce burr voltage, and improve system stability;hdA嘉泰姆

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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. The ceramic capacitor is located near the chiphdA嘉泰姆
    VIN and GND pins;hdA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;hdA嘉泰姆
4. FB feedback wiring should be kept away from switch signal nodes such as inductors, Schottky, SW, etc., and preferably surrounded by GND wiring.hdA嘉泰姆

Application InformationhdA嘉泰姆

Input capacitor selection;hdA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.hdA嘉泰姆
To prevent large transient voltages, it is necessary to choose a low ESR for the maximum RMS current requirementhdA嘉泰姆
(Equivalent series resistance) input capacitor. For most applications, a 220uF input powerhdA嘉泰姆
The container is sufficient, and its placement should be as close as possible to the position of the chip. Maximum RMS capacitorhdA嘉泰姆
The current is given by the following equation:hdA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. It is also recommended to increase the input capacitance when ceramic capacitors are not usedhdA嘉泰姆
Add a ceramic capacitor ranging from 0.1uF to 1uF for high-frequency decoupling.hdA嘉泰姆
Output capacitor selection hdA嘉泰姆
Low ESR capacitors should be selected at the output end to reduce output ripple voltage. Generally, once the capacitorhdA嘉泰姆
If ESR is met, the capacitor is sufficient to meet the demand. The ESR of any capacitor, along with its own capacityhdA嘉泰姆
A zero point will be generated for the system, and the larger the ESR value, the lower the frequency range in which the zero point is located, while the ceramic electrichdA嘉泰姆
The zero point of the capacitance is at a relatively high frequency, which can usually be ignored and is a good choice,hdA嘉泰姆
However, compared to electrolytic capacitors, high-capacity and high-voltage ceramic capacitors have a larger volume and higher cost,hdA嘉泰姆
Therefore, using ceramic capacitors ranging from 0.1uF to 1uF in combination with low ESR electrolytic capacitors is a good choicehdA嘉泰姆
Choose. The output voltage ripple is determined by the following equation:hdA嘉泰姆

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F in the formula: switching frequency, COUP: output capacitor, △ IL: ripple current in the inductor.hdA嘉泰姆
Inductance selection hdA嘉泰姆
Although inductors do not affect the operating frequency, the inductance value has a direct impact on ripple current,hdA嘉泰姆
The inductance ripple current △ IL decreases with the increase of inductance value and increases with the increase of VIN and VOUThdA嘉泰姆
And increase. A reasonable starting point for setting ripple current is △ IL=0.3 * ILIM, wherehdA嘉泰姆
LIM is the peak switch current limit. In order to ensure that the ripple current is at a specified maximum valuehdA嘉泰姆
Next, the selection should be made according to the following formulahdA嘉泰姆
Inductance value:hdA嘉泰姆

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