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, and outputs a 1.25-35v adjustable voltage, the maximum continuous current is 4A, the output power reaches 50W, and the efficiency exceeds 96%. Built-in fully integrated compensation module reduces the number of peripheral components by 40%, significantly reduces system costs and saves 65% PCB space, and adapts to the design requirements of high-density power supply.

   Product FeaturesuFt嘉泰姆

Highlights of core technologies

• 120kHz fixed frequency control, intelligent frequency reduction to 30kHz protection during short circuituFt嘉泰姆

• Full load efficiency> 95%, supports 100% duty cycle continuous outputuFt嘉泰姆

• Built-in synchronous rectifier MOSFETs, transient response time <15 secondsuFt嘉泰姆

■ multiple industrial protectionuFt嘉泰姆

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

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

• Dynamic current limiting function, applicable electric machine drive and battery management systemuFt嘉泰姆

■ highly reliable packaging designuFt嘉泰姆

TO263-5L package, the heat dissipation efficiency is increased by 25%, and 50W continuous output is supported.uFt嘉泰姆

AEC-Q100 Grade 1 certification, junction temperature tolerance up to 150 ℃uFt嘉泰姆

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

Differentiation advantage

1. 50W high power density: 4A continuous current output, suitable for compact equipment power supplyuFt嘉泰姆

2. Vehicle-level reliability: passed ISO 16750 vibration test to adapt to vehicle-mounted harsh environmentuFt嘉泰姆

3. Intelligent Thermal Management: TO263-5L package optimizes the cooling path and reduces the temperature rise by 30%uFt嘉泰姆

CXSD62664 provides highly reliable power supply solutions for new energy vehicles, industrial equipment and communication systems with high efficiency and industrial protection design, significantly improving the stability and service life of equipment under extreme working conditions.uFt嘉泰姆

   Application ScopeuFt嘉泰姆

✔Automotive Electronics: Car Charger Module, ADAS sensor power supply, BMS power managementuFt嘉泰姆
✔Industrial Automation: PLC controller, servo drives, industrial robot power supplyuFt嘉泰姆
✔Communication equipment: 5G base station optical module, POE Switch, optical fiber communication equipmentuFt嘉泰姆
✔IoT: edge computing gateway and high power sensor nodeuFt嘉泰姆

   Technical Specification (product PDF)uFt嘉泰姆

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

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   Product packaging diagramuFt嘉泰姆

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   Circuit Schematic diagramuFt嘉泰姆

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Bill of MaterialsuFt嘉泰姆

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DEMO physical pictureuFt嘉泰姆

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PCB layoutuFt嘉泰姆

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Typical performance parametersuFt嘉泰姆

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Application InformationuFt嘉泰姆
Input capacitance selectionuFt嘉泰姆
In continuous mode, the input current of the converter is a set of square waves with a duty cycle of about VOUT/VIN.uFt嘉泰姆
To prevent large transient voltage, low ESR must be selected for maximum RMS current requirements.uFt嘉泰姆
(Equivalent series resistance) input capacitor. For most applications, 1 220UF input poweruFt嘉泰姆
The container is enough, and its placement position is as close as possible to the position of CXSD62664. MaxuFt嘉泰姆
The RMS capacitor current is given by the following formula:uFt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 peak ripple current,uFt嘉泰姆
That is, IMAX = ILIM-△il/2. When the ceramic capacitor is not used, it is also recommended to use the input capacitor.uFt嘉泰姆
Add a 0.1uF to 1UF ceramic capacitor for high frequency decoupling.uFt嘉泰姆
Output capacitance selectionuFt嘉泰姆
Low ESR capacitance should be selected at the output to reduce the output ripple voltage. Generally speaking, once the capacitanceuFt嘉泰姆
If the ESR is satisfied, the capacitance is enough to meet the demand. The ESR of any capacitor together with its own capacityuFt嘉泰姆
A zero point will be generated for the system. The larger the ESR value, the lower the frequency range where the zero point is located, while CeramicsuFt嘉泰姆
The zero point of the capacitor is at a higher frequency, which can be ignored and is a better choice,uFt嘉泰姆
However, compared with electrolytic capacitor, large-capacity and high-voltage ceramic capacitors are larger in size and cost,uFt嘉泰姆
Therefore, it is not possible to use ceramic capacitors of 0.1uF to 1UF in combination with low ESR electrolytic capacitor.uFt嘉泰姆
Wrong choice. The output voltage ripple is determined by the following formula:uFt嘉泰姆

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F: switching frequency, COUT: output capacitor, △il: Ripple current in inductor.uFt嘉泰姆
Inductance selectionuFt嘉泰姆
Although the inductor does not affect the operating frequency, the inductor value has a direct influence on the ripple current,uFt嘉泰姆
Inductor ripple current △il decreases with the increase of inductance value, and increases with the increase of VIN and VOUTuFt嘉泰姆
Increase. A reasonable starting point for setting ripple current is △il = 0.3 * ILIM, where ILIMuFt嘉泰姆
The peak switching current limit. In order to ensure that the ripple current is below a specified maximum value,uFt嘉泰姆
The inductance value should be selected according to the following formula:uFt嘉泰姆

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PCB layout guideuFt嘉泰姆

1. VIN, GND, SW, VOUT and other power lines, thick, short, straight;uFt嘉泰姆
2. FB routing is far away from switching signals such as Inductance. It is recommended to use ground wire to surround it;uFt嘉泰姆
3. The positive electrode of the input capacitor is close to the VIN pin of the chip, and the negative electrode of the input capacitor is close to the GND pin of the chip.uFt嘉泰姆

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