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CXLB73322 USB PD Fast Charging Protocol Chip Details: Intelligent Enabling High Power Device Charging

With the popularity of Type-C interfaces and the widespread use of the USB Power Delivery(PD) protocol, users' demand for fast charging and high-power input devices is increasing. As a highly integrated USB PD receiving terminal protocol chip, CXLB73322 supports various fast charging protocols such as PD3.0/2.0 and BC1.2, and can realize a power request of up to 100W. It is widely used in wireless chargers, power tools, notebook computer accessories and other scenes. This article will systematically introduce its characteristics, configuration methods, typical circuits and design points to help developers build efficient and intelligent power input systems.xws嘉泰姆

First, product overview

CXLB73322 is a protocol chip designed for high-power powered devices, supporting a wide input voltage range of 4V to 22V, integrated PD communication module, VCONN detection and E-Mark simulation. The chip has the characteristics of high integration, compact peripheral circuit, flexible configuration, built-in overvoltage and over temperature protection mechanism, which can effectively improve the reliability of the system. It provides QFN20, ESSOP10, SOT23-6L and other packages to adapt to different space and heat dissipation requirements.xws嘉泰姆

Second, the core characteristics

2.1. Comprehensive agreement support：xws嘉泰姆

·   USB PD 3.0/2.0xws嘉泰姆

·   BC1.2xws嘉泰姆

·   Type-C forward and reverse insertion detection and automatic switchingxws嘉泰姆

2.2. High power outputSupport up to 100W PD power requestxws嘉泰姆

2.3. E-Mark simulation.Automatic recognition of VCONN, support greater than 60W outputxws嘉泰姆

2.4. Flexible voltage configuration：xws嘉泰姆

·   Single resistor configurationxws嘉泰姆

·   Level configuration (support MCU dynamic voltage regulation)xws嘉泰姆

2.5. Multiple protection mechanisms：xws嘉泰姆

·   Overvoltage protection (OVA)xws嘉泰姆

·   Over temperature protection (OTA)xws嘉泰姆

2.6. Package diversity: QFN20, ESSOP10, SOT23-6L, adapt to different application scenariosxws嘉泰姆

Three. Introduction to Pin Functions

Take CXLB73322D(QFN20) as an example, the key pins are described as follows:xws嘉泰姆

Fourth, detailed explanation of voltage configuration mode

4.1. Single resistor configuration (fixed voltage)

By connecting different resistance resistors between CFG1 and GND, a fixed request voltage can be set, which is suitable for product series design:xws嘉泰姆

4.2. Level configuration (dynamic voltage regulation)

Through the level combination of CFG1/CFG2/CFG3 three pins, MCU dynamic control or PCB fixed configuration can be realized:xws嘉泰姆

Note: If the MCU starts slowly, it is recommended to add a configuration resistor to CFG1 to avoid excessive voltage request during the startup phase.xws嘉泰姆

4.3. E-Mark simulation configuration.

If you need to request> 20V or> 60W power, you need to use Type-C male connector and connect 1kΩ resistor to GND at CC2 pin.xws嘉泰姆

Five, typical application circuit

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Scenario 1: Type-C mother port single resistor configuration (9V)

Suitable for wireless chargers, small appliances and other fixed voltage demand scenarios:xws嘉泰姆

·   CFG1 to 6.8kΩ resistor to GNDxws嘉泰姆

·   CC1/CC2 to Type-C interfacexws嘉泰姆

·   VDD External 1 & micro;F Capacitorxws嘉泰姆

·   VBUS is connected through current limiting resistorxws嘉泰姆

Scene 2: Type-C the public port E-Mark 20V output

Suitable for high-power equipment such as power tools and notebook computers:xws嘉泰姆

·   CC2 to 1kΩ resistor to GNDxws嘉泰姆

·   CFG suspended (default 20V)xws嘉泰姆

·   Use PD protocol communication, DP/DM short circuitxws嘉泰姆

Six, electrical characteristics and protection mechanism

chip built-in intelligent protection module:xws嘉泰姆

·   OVA: Real-time monitoring of VBUS voltage to prevent overvoltage impactxws嘉泰姆

·   OTA: Automatic power reduction or shutdown when junction temperature exceeds the limit to ensure system safetyxws嘉泰姆

Seven, design considerations

7.1. Configure resistance accuracy: It is recommended to use 1% precision resistor to ensure accurate voltage request.xws嘉泰姆

7.2. VBUS detection resistance: If the VBUS detection function is used, the resistor current limit shall be connected in series.xws嘉泰姆

7.3. PCB Layout Recommendations：xws嘉泰姆

·   VDD decoupling capacitor should be close to the chip pinxws嘉泰姆

·   CC line as short as possible and the same length, to avoid communication errorxws嘉泰姆

·   Pay attention to heat dissipation in high-power applications, and the bottom of the QFN package needs to be grounded for heat dissipation.xws嘉泰姆

7.4. Protocol Selection: If only PD protocol is required, CXLB73322K can be selected and DP/DM can be shorted.xws嘉泰姆

Eight, the application field expansion

·   Wireless chargerSupport high power PD input, improve charging efficiencyxws嘉泰姆

·   Laptop Accessories: such as Type-C docking station, power adapterxws嘉泰姆

·   Electric tools: Realize 20V fast charging and shorten charging waiting timexws嘉泰姆

·   Small appliances and care productsSuch as electric toothbrush, shaver, beauty instrumentxws嘉泰姆

·   Mobile power and energy storage equipment: Support multi-voltage gear, compatible with multiple devicesxws嘉泰姆

Nine, the conclusion

With its high integration, flexible voltage configuration, comprehensive protocol support and robust protection mechanism, CXLB73322 is an ideal choice for Type-C PD powered devices. Whether it is a wireless charger that pursues extreme efficiency or a power tool that requires high power input, the chip can provide a reliable and efficient fast charging solution. For detailed data sheets, samples or technical support, please visitJTM-IC official websitefor more information.xws嘉泰姆

Ten, the relevant chip selection guide download ► More similar products....xws嘉泰姆

Multiple Battery Charge Management Chips.pdf (289.07 KB)

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