Shenzhen CXW Technology., Co Ltd
15 years of experience
Summary:
CX2919AC is a multifunctional USB Type-C and Type-A dual port controller that integrates USB Type-C, USB Power Delivery (PD) 2.0/3.0, PPS, QC3.0+/QC3.0/QC2.0 fast charging protocol, Huawei FCP/SCP/HVSCP fast charging protocol, Samsung AFC fast charging protocol, BC1.2 DCP, and Apple device 2.4A charging specification.
The built-in Type-C protocol of CX2919AC can support automatic wake-up when Type-C devices are inserted, intelligently recognize the forward and reverse insertion of plugs, and achieve connection. The integrated PD protocol supports Bidirectional Markup Coding (BMC), integrates hardware's physical layer protocol and protocol engine, and does not require software to participate in encoding and decoding. When one of the Type-C and Type-A ports is connected to the device, both Type-C and Type-A ports can achieve independent fast charging function.
When both Type-C and Type-A are connected to the device, the output voltage will be reduced to 5V to supply power to the device. Specifically, when the Type-A port is continuously connected to the Apple charging cable but not connected to the Apple phone, the Type-C port still has a fast charging function. When used as a charger, the charging cable is often connected to the charger. Perfect solution to the fast charging problem when Type-A and Type-C ports are connected to charging cable applications. In addition, the Type-A port has a low cutoff current threshold of 10mA when fully charged, which can support small current charging of intelligent wearable devices.
CX2919AC dynamically adjusts voltage by connecting a Sink/Source current source to the feedback pins of AC-DC or DC-DC. Both the startup and voltage regulation processes have a soft start function, achieving a smooth voltage transition.
CX2919AC has multiple built-in protection mechanisms to ensure equipment safety, including dynamic overvoltage/undervoltage/overcurrent protection (the protection point can be adjusted proportionally based on the operating voltage/current requested by the equipment); Start monitoring (before VBUS output, it will monitor whether the port voltage is in a safe state).
CX2919AC integrated 10m Ω VBUS power switch transistor, integrated 10 m Ω current detection resistor, built-in VPWR and
VBUS dual discharge path saves peripheral devices and can quickly shut down the output and restore to a safe state in case of errors.
CX2919AC adopts TSSOP16 packaging, with a simple peripheral and easy to pass USB PD certification testing.
Characteristic:
Support for USB Type-C protocol
-Configured as DFP (Source) - Broadcast 3A/1.5A current
Support for USB Power Delivery (PD) 2.0 and 3.0 as well as PPS collaboration
CX7538BS is a high-performance secondary side synchronous rectification control circuit for switch-mode power <br/><br/>supplies. It easily meets the Level VI energy efficiency requirements in low-voltage, high-current switch-mode power <br/><br/>supply applications, making it an ideal solution for ultra-low forward voltage drop rectification devices. It also supports <br/><br/>various operating modes of switch-mode power supplies, such as CCM, QR , and DCM . Its extremely low forward <br/><br/>voltage drop results in much less conduction loss compared to Schottky diodes, greatly improving the system&#039;s <br/><br/>conversion efficiency and significantly reducing the temperature of the rectification device.<br/><br/><br/><br/>The CX7538BS chip features an NMOSFET synchronous rectification switch with a built-in voltage tolerance of 60V <br/><br/>and an extremely low internal resistance, with a typical RdsON as low as 12mΩ, providing the system with an output <br/><br/>capability up to 4A. The chip determines its switching state by detecting the source-drain voltage of the built-in <br/><br/>MOSFET, making it compatible with flyback converters in continuous mode, discontinuous mode, and quasi-resonant <br/><br/>operation modes.
Overview
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