CXSU63180 is a PWM boost converter with current control mode. The input voltage range is 2.7V to 12V, which can output a voltage of up to 13V and support switching current of 10 years. Its internal integration of 14v withstand voltage and 15 Mohm conductive power MOSFETs greatly improves the conversion efficiency and power density. The device is packaged in SOP-8L(EP) and has a heat dissipation pad at the bottom, which is suitable for portable devices with limited space.
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[ CXSU63180 ]"
CXSU63180: high-efficiency 10-year asynchronous boost converter to help design high-power portable devices
In modern portable electronic devices, the efficiency, volume and output capability of power system directly affect product performance and user experience. As a non-synchronous boost CXSU63180 converter in current control mode, DC-DC has become a charger, mobile power supply, with its output current of up to 10 years, extremely low on-resistance and high integration, ideal for applications such as LCD Display drivers. This article will introduce the core features, working principles and design points of CXSU63180 in depth to help engineers build an efficient and compact power supply architecture.
I. Product Overview
CXSU63180 is a PWM boost converter with current control mode. The input voltage range is 2.7V to 12V, which can output a voltage of up to 13V and support switching current of 10 years. Its internal integration of 14v withstand voltage and 15 Mohm conductive power MOSFETs greatly improves the conversion efficiency and power density. The device is packaged in SOP-8L(EP) and has a heat dissipation pad at the bottom, which is suitable for portable devices with limited space.
Second, core features
• Wide input voltage range: 2.7V-12V, suitable for a variety of battery and adapter input.
• High output capability: The maximum output voltage is 13V, and the output current can reach 10.0.
• Low on-resistance: Built-in 15 Mohm MOSFETs to improve efficiency and thermal performance.
• Fixed switching frequency: 400kHz, effectively reducing the inductance and capacitance volume.
• High Precision reference voltage: 1.2V ± 2% to ensure output voltage accuracy.
• Adjustable overcurrent protection: set the 2A-10A current limiting point through an external resistor (150kΩ-51kohm).
• Comprehensive protection mechanism: it has functions such as over-temperature protection, internal soft start, and under-voltage locking.
• Low power shutdown: turn off current ≤ 1μa to prolong battery life.
• Environmentally friendly packaging: SOP-8L(EP) halogen-free package, which meets the Green Standard.
Third, typical application scenarios
CXSU63180 is widely used in the following fields:
• Mobile power supply and fast charger
•LCD display backlight driver
•Digital cameras and handheld devices
•Portable Medical and industrial instruments
•Vehicle-mounted equipment and battery power supply system
IV. Electrical characteristics and performance advantages
Under the typical conditions of HVDD = 12V and ambient temperature 25℃, CXSU63180 shows the following excellent performance:
•Static current: 0.45mA (no switch)
•Average work Current: 4mA (switch status)
•VCC LDO output: 5V ± 5%, providing regulated power supply for internal circuits
•Switching frequency: 400kHz ± 15%
•Maximum duty cycle: 90%
•Over-temperature protection: 150 ℃ (threshold),130 ℃ (recovery)
Its efficiency remains high under various input and output conditions. For example, when VIN = 3.7V, VOUT = 5V, and IOUT = 2A, the efficiency can reach over 94%, excellent energy conversion capability.
V. Functional description and Design Guide
5.1. Working mode
CXSU63180 adopts peak current control mode and built-in slope equalizing circuit to ensure stable operation when the duty cycle is greater than 50%. PWM Modulation provides good response and low noise in the full load range.
5.2. Overcurrent protection settings
The peak switching current can be accurately set through the resistance (ROCP) between OC pin and GND:
•IOCP & asynmp; 2A when ROCP = 150kohm
•IOCP & asynmp; 10AR when OCP = 51 Kohm
It is recommended that the wiring be short to avoid attaching capacitors to the OC pin.
5.3. Enable control
When the EN pin is high (>1.1V), the chip is enabled. When the EN pin is low (<0.6V), the power consumption is reduced to less than 1μA.
5.4. Output voltage setting
The output voltage is set by the external divider resistance of the FB pin:
It is recommended to select resistance with high precision and good temperature characteristics.
5.5. Selection of peripheral components
•Inductance: 3.3 μH-10 μH power inductor is recommended. Saturation current> peak inductor current should be met, and DCR should be as low as possible.
•Output capacitor: X5R/X7R ceramic capacitors with low ESR are selected. The capacity depends on Ripple and load transient requirements.
•Diode: We recommend that you select a Schottky diode. Its low voltage drop and fast recovery characteristics help to improve efficiency, and the reverse withstand voltage must be higher than VOUT.
5.6. Compensation network
The external RC network of the COMP pin is used for loop compensation. The typical configuration is 4.7nF series resistance. The specific value must be adjusted according to the output capacitance and load characteristics.
VI. Layout suggestions
Good PCB design is crucial to noise suppression and efficiency improvement:
•The power path (VIN, LX, GND) should be short and wide, reducing parasitic parameters and voltage drop.
•LX node is a high-frequency switching point, which should control the area away from sensitive signals such as FB.
•FB divider resistance should be placed close to FB pins, away from LX and inductance.
•Chip GND (including heat dissipation pad) should be directly connected to the system ground with low impedance.
•The input/output capacitor should be close to the corresponding pin of the chip, and the ground end should be close to the ground plane.
VII. Packaging and supply information
CXSU63180 adopts SOP-8L(EP) package, which has good heat dissipation performance and welding reliability. The product supports tape packaging and 2500 MOQ, which is suitable for large-scale production.
VIII. Conclusion
CXSU63180 has become the preferred solution in the non-synchronous boost conversion market due to its high output capability, low on-resistance, flexible current protection and compact packaging. No matter in mobile power supply, display drive or all kinds of portable devices, its excellent efficiency and reliability can meet the high requirements of modern electronic systems for power supply. For data manuals, samples, or technical support, please visitJTM-IC official websiteFor more information.
