overview
USB Type-C to audio + fast charging chip LDR6028Q/LDR6023CQ, mainly for mobile phones with Type-C headphone jack to use headphones while charging. Single-chip embedded USB PD controller, easy to realize PD communication control, complies with USB Type-C 1.2 and USB PD 3.0 specifications, with simplified peripherals, and can be widely used in PD adapters, Type-C expansion docks, Type-C to audio, etc. class application.
2. Features
◇ QFN-16_3x3 small package
◇ Support USB PD 2.0, compatible with USB PD 3.0
◇ Support QC2.0, compatible with QC3.0
◇ PDO and REQUEST negotiation between transparent transmission adapter and smart devices (computer, tablet, mobile phone)
◇ Automatically convert DR_SWAP to UFP mode
◇ Provide peripheral reset control function and provide reset signal for peripherals
3. Application
◇ USB TYPE-C Audio Adapter
◇ USB Type-C HUB
◇ Lavalier Live Microphone
◇ Sound Card OTG Adapter
Features
Support positive and negative plug, plug and play, free driver installation
Support Type-C interface audio expansion of mobile phones, tablets, notebooks, etc.
A single chip completes PD protocol-related communication control, and the peripherals are simplified
Support boost to increase charging power
SOP8/ SSOP16/ QFN16 3*3 package, easy for miniaturization design
LDR6028Q supports 5V3A-15W fast charging, LDR6023Q supports boost charging, and supports up to 20V3A-60W fast charging.
This chip can communicate with the mobile phone and the charger at the same time, allowing the mobile phone to enter the USB HOST mode while charging (by default, the mobile phone is in the usb device mode when charging), so as to smoothly realize the function of listening while charging . What is commendable is that this chip can support both digital headphones and analog headphones (detected by pin3), and the compatibility is very good. The following is the application circuit diagram of this chip:
It can be seen from the circuit diagram that the periphery of this chip is very simple. While providing the analog earphone detection function, it can also configure the power through pin4. Limit the highest voltage within 9V to reduce the withstand voltage requirements of other components on the board, and reduce the size and cost.