CXLB73334 is a highly integrated single lithium battery charging management chip with SOT23-5 package and few peripheral components, which is very suitable for portable devices with limited space. The biggest highlight is the built-in battery positive and negative reverse connection protection and input power reverse connection protection, which greatly improves the safety and reliability of the system from the hardware level. The chip supports programmable charging current from 3mA to 600mA, is compatible with USB interface and adapter power supply, and is widely applicable to various consumer electronics and Internet of Things devices.
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[ CXLB73334 ]"
CXLB73334 single lithium battery charger chip: efficient, safe and compact charging solution
In today's increasingly popular mobile devices, the performance and safety of lithium battery charging management chips have become a key link in product design. CXLB73334 as a complete single lithium battery charger chip, with its unique functional design and stable performance, it shows excellent application value in portable electronic devices. This article will deeply analyze the core features, working principles and application suggestions of CXLB73334, providing comprehensive selection reference for engineers and purchasing personnel.
I. Product Overview
CXLB73334 is a highly integrated single lithium battery charging management chip with SOT23-5 package and few peripheral components, which is very suitable for portable devices with limited space. The biggest highlight is the built-inBattery positive and negative reverse connection protectionAndInput power reverse connection protection, greatly improving the security and reliability of the system from the hardware level. The chip supports programmable charging current from 3mA to 600mA, is compatible with USB interface and adapter power supply, and is widely applicable to various consumer electronics and Internet of Things devices.
II. Core functions and features
2.1. Comprehensive reverse connection protection mechanism
CXLB73334 both the battery terminal and the power terminal are provided with reverse connection protection circuit. When the battery or power supply is connected in reverse, the chip automatically enters the shutdown mode, effectively avoiding damage caused by misconnection and improving the robustness of the system.
2.2. Intelligent charging management
Chip useTrickle-constant current-constant voltageThree-stage charging control can effectively prolong battery life. When the battery voltage is lower than the preset threshold, the battery is slowly activated in Trickle mode; Stable current is provided after entering the constant current stage; Finally, the charging is completed in constant voltage mode, and the voltage accuracy is as high as ± 1%.
2.3 Thermal regulation and power optimization
Built-in thermal feedback mechanism can monitor chip temperature in real time and automatically adjust charging current in high temperature environment to prevent overheating damage. Combined with external heat dissipation design, it can achieve a maximum of 600mA continuous charging capability.
2.4. Low power consumption and status indication
The power consumption in standby mode is only 75μa, and automatic recharge and charging status indication (CHRG pin) are supported. Users can easily obtain the charging status through LED or MCU to improve user experience.
3. Typical application scenarios
CXLB73334 applicable to all kinds of low to medium power lithium battery power supply equipment, including but not limited:
· Portable equipment: Bluetooth headset, smart bracelet, mobile power
· Communication equipment: cellular phone, interphone, wireless module
· Consumer electronics: MP3 player, digital cameras, electronic toys
· IoT terminal: sensor nodes, smart tags, and wearable devices
Its small package and few peripheral components are especially suitable for PCB design projects with tight space.
IV. Design suggestions and precautions
4.1. Layout and heat dissipation
In high current (>400mA) applications, it is recommended to connect 0.3-0.6Ω dissipation resistance in series at the VCC terminal, and try to expand the ground copper foil area to improve the heat dissipation performance.
4.2. Capacitor selection and layout
To suppress voltage spikes, 10 μF ceramic capacitors should be placed near the VCC and BAT pins, and the grounding path should be short and thick.
5.3. Current detection method
When testing the charging current, ammeters should be connected in series at VCC rather than BAT to avoid affecting the charging accuracy and stability.
V. Packaging and pin functions
Six. Typical applications:
VII. Why did you choose CXLB73334?
CXLB73334 has achieved an excellent balance between security, integration and cost. Its unique dual reverse connection protection function is rare in many competing products and can provide additional security barriers for end products. At the same time, its wide input voltage range (up to 8V) and good thermal management capability enable it to work stably in various power supply environments.
CXLB73334 is undoubtedly an ideal choice for lithium battery charging solutions that pursue high reliability, small volume and low system cost. For more technical materials, application circuits and sample applications, welcome to visitJTM-IC official website (jtm-ic.com), we provide comprehensive product support and design guidance.
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