CXSD6192 is a high-performance step-down DC-DC converter with PWM control and a wide duty cycle range of 0% to 100%. The chip integrates low on-resistance power MOSFETs with high efficiency, low ripple and good load response characteristics. Its output voltage can be flexibly set between 1.25V and 37V, which is suitable for a variety of voltage conversion scenarios.
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[ CXSD6192 ]"
CXSD6192 Wide-Voltage Buck Converter: High Reliability Power Solution
In applications such as industrial control, automotive electronics and fast charging equipment, power systems need to have a wide input voltage range, high efficiency and multiple protection functions. Jiatem Semiconductor launchedCXSD6192It is a synchronous Buck DC-DC converter chip that meets these needs. Its wide voltage input of 8V to 40V, output current capability of up to 3A, and perfect protection mechanism make it ideal for all kinds of high voltage and high reliability applications.
Product overview
CXSD6192 is a high-performance step-down DC-DC converter with PWM control and a wide duty cycle range of 0% to 100%. The chip integrates low on-resistance power MOSFETs with high efficiency, low ripple and good load response characteristics. Its output voltage can be flexibly set between 1.25V and 37V, which is suitable for a variety of voltage conversion scenarios.
The chip has built-in loop compensation circuit, which effectively reduces the number of external components, system cost and PCB area. At the same time, the CXSD6192 supports two working modes of constant voltage (CV) and constant current (CC), and can realize intelligent fast charging output with QC2.0/QC3.0 protocol to meet the fast charging requirements of modern mobile devices.
Core Features and Benefits
Wide input voltage and high output capability
The CXSD6192 supports an input voltage range of 8V to 40V, with a maximum output current of 3A, and a maximum output power of 13W when outputting 5V is recommended. Its minimum voltage difference is only 0.3V, even when the input voltage is close to the output voltage can still work stably, suitable for battery-powered or voltage fluctuations in industrial environment.
High efficiency and low heat consumption
The on-resistance of the internal power MOSFET is very low, and it can maintain high efficiency in a wide load range with a fixed switching frequency of 150kHz. The measured data show that under the conditions of 12V input and 5V output, the efficiency is above 89%; when 24V input and 12V output, the efficiency can reach above 93%, which effectively reduces the heat consumption of the system.
Multiple protection mechanisms
The CXSD6192 has built-in over-voltage protection (OVP), over-current protection (OCP), short-circuit protection (SCP) and over-temperature protection (OTP) to ensure that the chip automatically enters the protection state under abnormal conditions to prevent damage to the system or peripheral devices. The hiccup restart mechanism can automatically resume work after the fault is removed, which improves the reliability of the system.
Support fast charging and flexible configuration
Through the external voltage divider resistor of FB pin, the output voltage can be flexibly set, and the QC2.0/QC3.0 fast charging protocol can be easily adapted. The CS pin supports output current detection and can be used for constant current control or current limit protection. It is suitable for scenarios requiring precise current management, such as chargers and on-board power supplies.
Typical application scenarios
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Car charger and power adapter
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Industrial Control System and PLC Module
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Network communication equipment and routers
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LED Driver and Lighting System
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Fast charging protocol compatible power supply for mobile devices
Design Guide and Selection Recommendations
Inductance Selection and Calculation
A 47 μH toroidal inductor (wire diameter ≥ 0.5mm) is recommended for best performance. To customize the inductance, refer to the following formula:
freewheeling diode
It is recommended to use a Schottky diode with a reverse withstand voltage higher than the maximum input voltage and a 30% margin. The average current calculation formula is:
Layout and thermal recommendations
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The input capacitor should be close to the VIN and GND pins, and the chip ceramic capacitor should be used in parallel with the electrolytic capacitor.
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The SW node should be paved with copper to increase the heat dissipation area, and provide tin leakage holes to enhance heat dissipation.
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Sensitive signal lines such as FB and CS should be surrounded by ground wires and kept away from high-frequency switch nodes.
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The back pad of the chip should be well grounded, and it is recommended to set a large area GND plane in each layer of the PCB.
Typical Application Circuit
The CXSD6192 can be configured as constant voltage, constant current or fast charge output mode. In constant voltage applications, the output voltage is set via R1, R2:
Vout = 1.25v ×(1 R1/R2)In constant current applications, through the CS pin external current detection resistor R_CS to achieve:
IOUT=115mV/RCSPackaging and Reliability
The CXSD6192 adopts ESOP-8 package, which has good heat dissipation performance and welding reliability. The product meets industrial-grade temperature standards and is suitable for working environments from -40°C to 85°C. All products have passed strict reliability tests to ensure long-term stable operation under harsh conditions.
Conclusion
The CXSD6192 introduced by Jiatem Semiconductor has become the preferred chip for industrial, automotive and consumer power systems for its wide voltage input, high efficiency, high integration and perfect protection functions. Whether it is used in fast charging equipment, industrial power supplies or on-board systems, it can provide stable, efficient and reliable power conversion solutions. For more technical information, reference designs or sample applications, please visit the official website of Jiatem:jtm-ic.com.
