CXLB73275A/B is an intelligent management chip designed for single lithium battery, which has three core functions: charging management, voltage boost and battery protection. The input voltage range is 4V to 5.5V, The withstand voltage is up to 16V, and it has excellent surge prevention capability. The chip has built-in linear charging circuit, and the charging current can be programmed and set in the range of 0.1A to 0.7A through external resistor to meet the needs of batteries with different capacities. At the same time, it supports various charging voltage specifications such as 4.20V, 4.35V, and 4.4V to meet the charging requirements of different battery types.
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[ CXLB73275 ]"
In modern electronic devices, especially portable devices such as handheld instruments, Bluetooth speakers, wireless microphones, etc., efficient battery management chips have become the key to ensure equipment performance and endurance. CXLB73275A/B is a highly integrated single-chip battery management solution, which integrates linear charging, synchronous rectification, boost conversion and multiple protection functions, and is widely used in various single-cell lithium battery power supply scenarios. This article will deeply analyze the technical characteristics, application scenarios and its advantages in improving system energy efficiency and security.
I. Product Overview
CXLB73275A/B is an intelligent management chip designed for single lithium battery, which has three core functions: charging management, voltage boost and battery protection. The input voltage range is 4V to 5.5V, The withstand voltage is up to 16V, and it has excellent surge prevention capability. The chip has built-in linear charging circuit, and the charging current can be programmed and set in the range of 0.1A to 0.7A through external resistor to meet the needs of batteries with different capacities. At the same time, it supports various charging voltage specifications such as 4.20V, 4.35V, and 4.4V to meet the charging requirements of different battery types.
II. Detailed description of core features
2.1. Efficient charging management
CXLB73275A/B adopts a high-precision linear charging architecture with a charging voltage accuracy of ± 1% to ensure that the battery is fully charged within a safe range. Through the external resistor of PROG pin, users can flexibly set the charging current, which can support up to 700mA, and is suitable for a variety of lithium batteries from low capacity to high capacity. The chip also provides the charging status indication function, driving LED through CHRG pin to visually display the charging process.
2.2. Intelligent boost output
The chip has a built-in synchronous rectifier boost converter, which can steadily boost the lithium battery voltage to 9.5V and the maximum output current reaches 500mA. It is unique in that it supports two output modes: fixed 9.5V output and analog alkaline battery output characteristics. In the latter mode, the output voltage gradually decreases from 9.5V to 5V with the battery power, which perfectly simulates the discharge curve of traditional carbon or alkaline batteries and is suitable for handheld devices that require power display.
2.3. Comprehensive protection mechanism
CXLB73275A/B integrates over-voltage, under-voltage, over-current, short circuit and over-temperature protection functions to ensure safe and reliable charging and discharging processes. Its battery fault detection mechanism can cut off the circuit in time under abnormal conditions to prevent battery damage. In addition, the chip has the output short circuit protection function and can be recovered without charging activation, greatly improving the system reliability.
2.4. Low power consumption and high energy efficiency
In the no-load state, the power consumption of the chip is less than 25μa, and the light load efficiency is as high as over 93%, which significantly prolongs the battery life. Its 1MHz high switching frequency and internal integration MOS tube further optimize the conversion efficiency and system volume.
3. Typical application scenarios
· Handheld instrument: such as multimeter and rangefinder, CXLB73275 can replace the traditional 9V battery, providing more durable power supply and power analog display.
· 6F22/6LR61 lithium battery replacement solution: directly replace standard 9V battery, support Rechargeable Cycle, economical and environmentally friendly.
· Bluetooth speaker and wireless microphone: provides stable and efficient boost output to ensure long-time work of audio equipment.
· Other 9V power supply equipment: including portable medical equipment, security equipment, etc., can use this chip to realize intelligent power management.
4. Package and pin description
CXLB73275 provides ESOP8 package with good heat dissipation performance and compact layout. The PROG and TS pins of Version A and version B are slightly different. The charging current setting and temperature detection functions are supported respectively. You can select the PROG and TS pins according to your actual needs. For more information about pin functions and electrical parameters, see the technical documentation.
V. Summary of technical advantages
CXLB73275A/B is an ideal choice for single lithium battery boost applications due to its high integration, flexible configuration options and comprehensive protection functions. The chip performs well in terms of energy efficiency, safety and adaptability, and is especially suitable for portable electronic devices with high power management requirements.
VI. Schematic diagram of typical applications
Seven, about JTM-IC
JTM-IC (official website:jtm-ic.com) focusing on the research and development and sales of high-performance power management chips, we are committed to providing reliable integrated circuit solutions for customers around the world. For more information about CXLB73275 series products, please visit our official website or contact the technical support team.
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