Product overview

CXSD62661 high-efficiency synchronous rectifier buck converter technology analysis, as a new generation of intelligent power solutions, CXSD62661 synchronous rectifier buck DC-DC switching converter with itsJ8p嘉泰姆
Superior performance for an innovative experience in industrial control and automotive electronics. The device uses advanced 120kHz constant frequency PWM control technology, in 5V to 40V wide voltage input range.J8p嘉泰姆
The conversion efficiency is as high as 95%, and the maximum output current can reach 4A, which perfectly supports the 30W power output requirement.J8p嘉泰姆

   Product FeaturesJ8p嘉泰姆

Core advantage highlights:J8p嘉泰姆

Wide voltage adaptation: 1.25-35V precise adjustable output, suitable for various equipment requirementsJ8p嘉泰姆
Full load efficient operation: patented synchronous rectification architecture achieves 95% + conversion efficiencyJ8p嘉泰姆
Military grade reliability:-40 ℃ ~ 125 ℃ wide temperature range operation, in line with Class3A ESD protection standardsJ8p嘉泰姆
Intelligent protection mechanism: triple protection system (overheat shutdown/dynamic current limiting/short circuit frequency reduction) to ensure equipment safetyJ8p嘉泰姆
✓ Compact design: Integrated MOSFET + compensation circuit, TO252-5L package saves 70% PCB spaceJ8p嘉泰姆

Technological innovation features:J8p嘉泰姆

• 100% maximum duty cycle output capability to ensure low dropout operation stabilityJ8p嘉泰姆
• ± 2% high-precision voltage reference to improve system control accuracyJ8p嘉泰姆
• Intelligent frequency switching technology (120kHz & rarr;30kHz) to deal with short circuit anomaliesJ8p嘉泰姆
• Optimize thermal management design to effectively reduce system temperature riseJ8p嘉泰姆

   Scope of applicationJ8p嘉泰姆

Industry application scenarios:J8p嘉泰姆

▶New energy vehicles: on-board electronic systems, BMS power managementJ8p嘉泰姆
▶Industrial automation: PLC controller, mechanical arm drive power supplyJ8p嘉泰姆
▶Communication infrastructure: 5G base station equipment, optical fiber transmission moduleJ8p嘉泰姆
▶Smart IoT: Edge computing terminals, remote monitoring equipmentJ8p嘉泰姆

The converter significantly reduces BOM cost through integrated design. Its excellent linearity/load adjustment rate (<1%) and multiple protection mechanisms provide reliable guarantee for equipment operation in harsh environments. It is an ideal choice for engineers to build efficient and compact power supply systems.J8p嘉泰姆

   Technical Specification (Product PDF)J8p嘉泰姆

If you need detailed PDF specifications, please scan WeChat and contact us. You can also get free samples and technical support.!J8p嘉泰姆

      J8p嘉泰姆

   Product packaging diagramJ8p嘉泰姆

  J8p嘉泰姆

   Circuit schematicJ8p嘉泰姆

J8p嘉泰姆
BOMJ8p嘉泰姆

J8p嘉泰姆
DEMO physical drawingJ8p嘉泰姆

           J8p嘉泰姆
PCB LayoutJ8p嘉泰姆

           J8p嘉泰姆
Typical performance parametersJ8p嘉泰姆

           J8p嘉泰姆
      Application Information J8p嘉泰姆

Input capacitance selectionJ8p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. In order to prevent large transient voltages, the maximumJ8p嘉泰姆
A low ESR (equivalent series resistance) input capacitor is selected for RMS current requirements. For most applications, a 100uF input capacitor is sufficient, and itsJ8p嘉泰姆
Place it as close to the CXSD62661 as possible. The maximum RMS capacitor current is given:J8p嘉泰姆
                 J8p嘉泰姆
The maximum average output current IMAX is equal to the difference between the peak current and 1/2 peak ripple current, I .e., IMAX = ILIM-ΔIL/2. without using ceramic electricJ8p嘉泰姆
It is also recommended to add a 0.1uF to 1uF ceramic capacitor to the input capacitor for high-frequency decoupling.J8p嘉泰姆
Output capacitance selectionJ8p嘉泰姆
A low ESR capacitor should be selected at the output to reduce the output ripple voltage. Generally speaking, once the capacitor ESR is met, the capacitor is sufficient to meet the demand. AnyJ8p嘉泰姆
The ESR of the capacitor together 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 the ceramic capacitor is in oneJ8p嘉泰姆
Higher frequency, usually can be ignored, is a good choice, but compared with electrolytic capacitors, large capacity, high voltage ceramic capacitors will be larger, higher cost,J8p嘉泰姆
Therefore, using 0.1uF to 1uF ceramic capacitors in combination with low ESR electrolytic capacitors is a good choice. The output voltage ripple is determined:J8p嘉泰姆
                          J8p嘉泰姆
F in the formula: switching frequency, COUT: output capacitance, △IL: ripple current in inductor.J8p嘉泰姆
Inductance selectionJ8p嘉泰姆
Although the inductor does not affect the operating frequency, the inductance value has a direct impact on the ripple current, and the inductor ripple current △IL decreases with the increase of the inductance value,J8p嘉泰姆
and increases as VIN and VOUT rise. A reasonable starting point for setting the ripple current is △IL = 0.3 * ILIM, where ILIM is the peak switch currentJ8p嘉泰姆
Limits. In order to ensure that the ripple current is below a specified maximum value, the inductance value should be selected as follows: J8p嘉泰姆
                    J8p嘉泰姆
 J8p嘉泰姆

PCB Layout GuideJ8p嘉泰姆

1. VIN, GND, SW, VOUT and other power lines, thick, short and straight;J8p嘉泰姆
2. FB line away from the inductance and other switch signal place, it is recommended to use the ground wire surrounded;J8p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.J8p嘉泰姆

  Related Chip Selection Guide             More similar products......J8p嘉泰姆