CXLB7316A is a high-efficiency synchronous Buck charge management chip designed for 2 to 10 cell Li-ion/Li-polymer batteries. Its wide input voltage range of 8V to 60V, supports a maximum charge current of 10A, and is suitable for a variety of high-power portable devices. The chip is packaged in TSSOP-20, integrating high-precision voltage and current regulation, intelligent battery detection, multi-stage charging control and multiple protection mechanisms, making it an ideal choice for high-performance charging systems.
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[ CXLB7316A ]"
In modern portable electronic devices, an efficient and safe battery charge management scheme is essential. As a high-performance synchronous switching type lithium ion/lithium polymer battery charging management chip, CXLB7316A is widely used in notebook computers, smart phones, self-charging battery packs and various handheld devices. This article will provide an in-depth analysis of the key features, working principles and application advantages of the CXLB7316A to help engineers choose more reliable power management solutions in their designs.
1. CXLB7316A Overview
CXLB7316A is a high-efficiency synchronous Buck charge management chip designed for 2 to 10 cell Li-ion/Li-polymer batteries. Its wide input voltage range of 8V to 60V, supports a maximum charge current of 10A, and is suitable for a variety of high-power portable devices. The chip is packaged in TSSOP-20, integrating high-precision voltage and current regulation, intelligent battery detection, multi-stage charging control and multiple protection mechanisms, making it an ideal choice for high-performance charging systems.
2. Key Features and Benefits
· Wide input voltage range: 8V ~ 60V, suitable for a variety of power input scenarios.
· High precision control: The charging voltage accuracy is 0.5, and the charging current accuracy is 4%, ensuring that the battery charging process is stable and reliable.
· Multi-cell battery support: Flexible configuration of the number of battery sections through the CELL pin, supporting 2~10 lithium batteries or 12V/24V lead-acid batteries.
· Intelligent charging management: Support pre-charging, constant current, constant voltage three-stage charging, effectively extending battery life.
• Comprehensive protection mechanisms: Built-in protection functions such as overvoltage, short circuit, over temperature, Cycle-by-Cycle current limit, etc. to improve system safety.
· Low power design: The battery power consumption in sleep mode is less than 15 μA, and the energy saving effect is significant.
· Status indication and fault recovery: Output the charging status through STAT1/STAT2 pins, support automatic recovery of timeout errors.
3. working principle and charging process
The charging process of the CXLB7316A is divided into three stages:
3.1. Pre-charge phase: When the battery voltage is lower than 3V/cell, the chip is pre-charged with a lower current to activate the battery and avoid damage.
3.2. Constant current charging stage: After the battery voltage rises above 3V/section, the chip will quickly charge at the set maximum current.
3.3. Constant voltage charging phase: When the battery voltage is close to the set value, it will switch to constant voltage mode, and the current will gradually decrease until it is fully charged.
After charging is completed, if the battery voltage drops below the recharge threshold due to self-discharge or load consumption, the chip will automatically restart the charging cycle to ensure that the battery is always in the best condition.
Detailed explanation of 4. key functions
4.1. Charging current setting
The charging current can be precisely set by an external ISET pin resistor and a sense resistor (RSENSE). The formula is as follows:
The pre-charge current and the cut-off current are 20% and 10% of the constant current value, respectively, to meet the needs of different stages.
4.2. Battery temperature detection
External NTC thermistor to THM pin, real-time monitoring of battery temperature. When the temperature exceeds the set range, the charging is automatically suspended and the timing is stopped to ensure safety.
4.3. Charging time limit
Through the TTC pin external capacitor, you can set the total charge time and pre-charge time. The chip enters a fault state when it times out, and outputs a pulse alarm through STAT2.
4.4. Constant voltage fine adjustment function
Through the VTRIM pin external resistor, the constant voltage output value can be fine-tuned to adapt to different battery models and process differences.
5. application scenario recommendation
The CXLB7316A is suitable for a variety of high-reliability applications, including:
· Laptops and Ultrabooks
· PDA, Smartphone and Tablet Devices
· Self-charging battery pack with independent charger
· Industrial Handheld Devices and Power Tools
Why did 6. choose the JTM-IC CXLB7316A?
As a professional integrated circuit solution provider, JTM-IC (jtm-ic.com) is committed to providing customers with high-performance and high-reliability power management chips. With its comprehensive function integration, precise control ability and powerful protection mechanism, CXLB7316A has become the first choice for many portable device manufacturers. We provide comprehensive technical support and sample services to help customers quickly achieve product upgrades and innovation.
Seven, the conclusion
CXLB7316A is not only a full-featured battery charge management chip, but also a reliable partner for portable device power design. Its high integration, high precision and high security make it stand out in the fierce market competition. Welcome to JTM-IC official website (jtm-ic.com) Learn more about product details and technical information, and work with us to create a new future for smart power!
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