CXLB73323 is a protocol chip designed for USB Type-C and Type-A interface devices. It has the ability to automatically identify charger protocols and intelligently apply for set voltages. This series offers a variety of models, covering protocols from PD3.0 to PD3.1, supporting applications of up to 48V voltage, with the characteristics of compact peripheral circuits, fast response and flexible configuration, and is suitable for all kinds of devices that need to obtain high power input from USB ports.
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[ CXLB73323 ]"
CXLB73323 USB PD protocol chip: intelligent voltage application, enabling multi-scene fast charging design
With the rapid development of fast charging technology, the demand for intelligent identification and high power input is increasing. As a highly integrated USB PD power receiving chip supporting multi-protocol automatic handshake, the CXLB73323 series can flexibly set the output voltage from 5V to 48V and support E-Mark simulation function. It is widely used in wireless charging, vehicle equipment, industrial testing and other scenarios. This article will analyze its characteristics, configuration methods and application design in depth to help engineers build efficient and intelligent power input systems.
First, product overview
CXLB73323 is a protocol chip designed for USB Type-C and Type-A interface devices. It has the ability to automatically identify charger protocols and intelligently apply for set voltages. This series offers a variety of models, covering protocols from PD3.0 to PD3.1, supporting applications of up to 48V voltage, with the characteristics of compact peripheral circuits, fast response and flexible configuration, and is suitable for all kinds of devices that need to obtain high power input from USB ports.
Second, the core characteristics
2.1 Comprehensive Agreement Support：
· USB Type-C PD3.0/PD3.1 (including PPS)
· Type-A high voltage protocols (e. g. QC)
2.2. Wide voltage range setting: Support 5V, 9V, 12V, 15V, 20V, 28V, 36V, 48V and other multi-gear output
2.3. Intelligent voltage matching: Automatically find the available voltage closest to the set value
2.4. E-Mark simulation function.: Some models support analog E-Mark chips, suitable for wire and high-power scenarios.
2.5. High degree of integration: Less peripheral components, low system cost
2.6. Multiple packages: The whole series adopts DFN2 × 2-6L package, small size and good heat dissipation
Third, the model selection guide
| Model | Protocol Support | Maximum voltage | E-Mark support |
|---|---|---|---|
| CXLB73323KL | PD3.0 QC | 20V | No |
| CXLB73323KH | PD3.1 QC | 48V | No |
| CXLB73323KLE | PD3.0 QC | 20V | Yes |
| CXLB73323KHE | PD3.1 QC | 48V | Yes |
Hint: PD protocol has higher priority than QC protocol, and the system will automatically select the best handshake.
Four, pin function and configuration
| Pin | Name | Function Description |
|---|---|---|
| 1 | CC1 | Type-C CC1 communication |
| 2 | VDD | Chip power supply (3V-5.1V) |
| 3 | FUNC | Voltage setting resistor access terminal |
| 4-5 | DP/DM | USB data cable for port A protocol |
| 6 | CC2 | Type-C CC2 Communications |
| EP | GND | Chip ground (thermal pad) |
Five, voltage setting method
By connecting different resistance resistors to the FUNC pin, the required application voltage can be set:
5.1. CXLB73323KL (up to 20V)
| Resistance | Application voltage |
|---|---|
| Suspended | 5V |
| 200kΩ | 9V |
| 120kΩ | 12V |
| 51kΩ | 15V |
| Grounding | 20V |
5.2. CXLB73323KH (up to 48V)
| Resistance | Application voltage |
|---|---|
| Suspended | 5V |
| 200kΩ | 20V |
| 120kΩ | 28V |
| 51kΩ | 36V |
| Grounding | 48V |
Note: If the charger does not support the set voltage, the chip will automatically select the closest available voltage.
Six, typical application circuit
Scenario 1: Type-C mother seat application (wireless charger, speaker)
· VDD is connected to VBUS through 1kΩ resistor and connected in parallel with 1 & micro;F capacitor
· CC1 and CC2 are respectively connected to the Type-C base CC pins
· DP/DM to corresponding data line
· FUNC is connected to the set resistance (for example, 120kΩ corresponds to 12V)
Scenario 2: Type-C male E-Mark simulation (high-power wire, on-board equipment)
· Select CXLB73323KLE/KHE model
· Any CC is connected to Type-C male CC pin
· Another CC to 1kΩ resistor to ground (analog E-Mark)
· FUNC RESISTANCE SET TARGET VOLTAGE
Seven, design considerations
7.1. Power supply design：
· VDD can be provided by VBUS via resistor step-down or external LDO
· It is recommended to direct 1 & micro;F decoupling capacitor between VDD and GND
7.2. Communication lines：
· CC routing should be short and straight to avoid interference
· If only PD protocol is used, DP/DM can be suspended or shorted
7.3. E-Mark Configuration：
· Only KLE/KHE models support E-Mark emulation
· When in use, a 1kΩ resistor must be connected to the ground at the other CC pin.
7.4. Thermal design：
· DFN package bottom pad should be grounded and copper plated to improve thermal performance
Eight, the application field
· Wireless charger: Intelligent application for high power input such as 12V/15V
· bluetooth speakerCompatible with multiple chargers to enhance user experience
· On-board equipmentSupport PD3.1 high voltage, adapt to vehicle fast charging environment
· Energy storage power supplyFlexible input voltage setting, compatible with a variety of adapters
· Industrial Test Equipment: Stable access to high-power USB input, simplify power supply design
Nine, the conclusion
CXLB73323 series chips with its intelligent protocol identification, flexible voltage setting and high integration characteristics, become the ideal choice for all kinds of USB powered devices. Whether it is consumer electronics, industrial equipment or in-vehicle systems, the chip can provide efficient and reliable fast charging solutions. For samples, technical information or design support, welcome to visitJTM-IC official websiteLearn more
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