Product overview

CXSD62664 is a high-performance synchronous buck DC-DC converter for harsh industrial and automotive scenarios. It adopts a 120KHz fixed switching frequency architecture, supports a wide input voltage of 5-40V, outputs an adjustable voltage of 1.25-35V, has a maximum continuous current of 4A, an output power of 50W, and an efficiency of over 96%. The built-in fully integrated compensation module reduces the number of peripheral components by 40%, significantly reduces system cost and saves 65% PCB space, and adapts to the design requirements of high-density power supply.

   Product FeaturesNcQ嘉泰姆

Core Technology Highlights

• 120KHz Fixed Frequency ControlIntelligent frequency reduction to 30KHz protection in case of short circuitNcQ嘉泰姆

• Full load efficiency> 95%Support 100% duty cycle continuous outputNcQ嘉泰姆

• Built-in synchronous rectifier MOSFET, transient response time <15μsNcQ嘉泰姆

■ Multiple industrial protectionNcQ嘉泰姆

• Triple safety mechanism: overcurrent/short circuit/overheat protection (-40 ℃ ~ 125 ℃ wide temperature range)NcQ嘉泰姆

• Class 3A ESD protection (HBM 16kV), surge resistance increased by 45%NcQ嘉泰姆

• Dynamic current limiting function, suitable for motor drive and battery management systemNcQ嘉泰姆

■ Highly reliable package designNcQ嘉泰姆

TO263-5L package, heat dissipation efficiency increased by 25%, support 50W continuous outputNcQ嘉泰姆

Certified by AEC-Q100 Grade 1, junction temperature tolerance up to 150 ℃NcQ嘉泰姆

Compatible with 12V/24V vehicle system and industrial 24V power networkNcQ嘉泰姆

Differentiated advantage

1. 50W high power density4A continuous current output, suitable for compact equipment power supplyNcQ嘉泰姆

2. On-board level reliability: ISO 16750 vibration test, adapt to the harsh environment of the vehicleNcQ嘉泰姆

3. Intelligent thermal management: Optimize the heat dissipation path TO263-5L the package, and reduce the temperature rise by 30%NcQ嘉泰姆

With high performance and industrial protection design, the CXSD62664 provides highly reliable power solutions for new energy vehicles, industrial equipment and communication systems, significantly improving the stability and life of equipment under extreme conditions.NcQ嘉泰姆

   Scope of applicationNcQ嘉泰姆

✔Automotive ElectronicsOn-board charging module, ADAS sensor power supply, BMS power managementNcQ嘉泰姆
✔Industrial AutomationPLC controller, servo drive, industrial robot power supplyNcQ嘉泰姆
✔Communication equipment5G base station optical module, POE switch, optical fiber communication equipmentNcQ嘉泰姆
✔Internet of ThingsEdge computing gateway, high power sensor nodeNcQ嘉泰姆

   Technical Specification (Product PDF)NcQ嘉泰姆

If you need detailed PDF specifications, please scan WeChat and contact us. You can also get free samples and technical support.!NcQ嘉泰姆

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   Product packaging diagramNcQ嘉泰姆

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   Circuit schematicNcQ嘉泰姆

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DEMO physical drawingNcQ嘉泰姆

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PCB LayoutNcQ嘉泰姆

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Typical performance parametersNcQ嘉泰姆

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Application InformationNcQ嘉泰姆
Input capacitance selectionNcQ嘉泰姆
In continuous mode, the input current to the converter is a set of square waves with a duty cycle of approximately VOUT/VIN.NcQ嘉泰姆
In order to prevent large transient voltages, a low ESR must be selected for the maximum RMS current requirementNcQ嘉泰姆
(equivalent series resistance) input capacitor. For most applications, 1 220uF input powerNcQ嘉泰姆
The container is sufficient, and it is placed as close as possible to the position of the CXSD62664. Max.NcQ嘉泰姆
The RMS capacitor current is given:NcQ嘉泰姆

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where the maximum average output current IMAX is equal to the difference between the peak current and 1/2 peak ripple current,NcQ嘉泰姆
IMAX = ILIM-△IL/2. When ceramic capacitors are not used, it is also recommended that the input capacitorNcQ嘉泰姆
Add a 0.1uF to 1uF ceramic capacitor for high frequency decoupling.NcQ嘉泰姆
Output capacitance selectionNcQ嘉泰姆
A low ESR capacitor should be selected at the output to reduce the output ripple voltage. Generally speaking, once the capacitorNcQ嘉泰姆
ESR is met, the capacitance is sufficient to meet the demand. The ESR of any capacitor together with its own capacityNcQ嘉泰姆
will produce a zero point for the system, the larger the ESR value, the lower the frequency band in which the zero point is located, and the ceramicNcQ嘉泰姆
The zero point of the capacitor is at a higher frequency, which can usually be ignored, and is a good choice,NcQ嘉泰姆
However, compared with electrolytic capacitors, large-capacity, high-voltage ceramic capacitors will be larger in size and higher in cost,NcQ嘉泰姆
Therefore, the use of 0.1uF to 1uF ceramic capacitors in combination with low ESR electrolytic capacitors is notNcQ嘉泰姆
The wrong choice. The output voltage ripple is determined:NcQ嘉泰姆

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F in the formula: switching frequency, COUT: output capacitance, △IL: ripple current in inductor.NcQ嘉泰姆
Inductance selectionNcQ嘉泰姆
Although the inductor does not affect the operating frequency, the inductance value has a direct impact on the ripple current,NcQ嘉泰姆
The inductor ripple current △IL decreases with the increase of the inductor value, and increases with the increase of VIN and VOUT.NcQ嘉泰姆
Increase. A reasonable starting point for setting the ripple current is △IL = 0.3 * ILIM, where ILIMNcQ嘉泰姆
is the peak switch current limit. In order to ensure that the ripple current is below a specified maximum value,NcQ嘉泰姆
The inductance value shall be selected as follows:NcQ嘉泰姆

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PCB Layout GuideNcQ嘉泰姆

1. VIN, GND, SW, VOUT and other power lines, thick, short and straight;NcQ嘉泰姆
2. FB line away from the inductance and other switch signal place, it is recommended to use the ground wire surrounded;NcQ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.NcQ嘉泰姆

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