Recently, one plus a new generation of true wireless Bluetooth headset ONEPLUS Buds N was officially released, using a delicate trend design, equipped with a 12.4mm super dynamic unit, supporting Dolby Atmos; supporting dual microphone AI call noise reduction; ip55 dustproof and waterproof, 30 hours of comprehensive endurance, and 94ms low latency performance, providing users with excellent wireless audio experience.
I love audio network to understand that one plus Buds N this time using the overall solution of Siyuan semiconductor power management, including TWS headphone power management chip SY8801, power management PMIC SY5501, OVP chip SY8702, to help customers provide consumers with quality product experience.
About SY8801
SY8801 is a single-chip solution designed for TWS headphone charging compartment, the chip integrates a charging module and a discharge module, the charging current and discharge cutoff current can be adjusted externally, and the SY8801 can realize communication between the headphone charging compartment and the headphone by using the output power supply and ground. The chip integrates a standard I2C interface and interrupt signal to facilitate communication between the chip and the MCU, while also providing load detection and load insertion identification. The SY8801 is ideal for the design of TWS headphone charging compartments, greatly simplifying peripheral circuits and components, and providing a simple and easy-to-use solution for TWS headphone charging compartment applications. The SY8801 is available in a QFN24 package.
apply:
TWS headphone charging compartments, portable electronics, etc
peculiarity:
Standby current: 5uA;
Charging current external resistance adjustment, constant VIN current;
Maximum charging current: 1.2A;
Input withstand voltage up to 28V;
Charging efficiency up to 93%@0.5A;
Charge while discharging path management, discharge priority;
Preset 4.2V/4.35V charging float charge voltage, accuracy of ±1%;
Synchronous boost output 5V, efficiency up to 93%@0.1A;
Support load insertion recognition;
Support load current detection, light load shutdown current external resistance adjustment;
Discharge module overcurrent, short circuit, overvoltage, over temperature protection;
1-4 LED display, external automatic recognition, support headphones to put prompts;
Integrated button function, click discharge, long press to close discharge (optional version);
VOL/VOR supports two single-wire communication modes;
Integrated enable control and I2C communication interface, can be flexibly customized products;
Complies with the latest IEC62368 standard.
About SY5501
The SY5501 is a chip specifically designed for TWS headphones that provides the perfect solution for charging and isolating communications. The chip integrates linear charge management, discharge protection, (warehouse and headphone) single-wire two-way data communication and I2C communication interface, which is convenient for users to realize headphone charge and discharge management and protocol communication; SY5501 maximum charging current external resistance adjustable, while supporting constant current charging ICC, float charge voltage VFLOAT gear I2C adjustment; chip integrated NTC detection and protection function, more safely charge and discharge management of the battery; SY5501 with battery discharge protection and ship mode function, The low power consumption requirements of the headset system can be realized. Chip integrated private control instructions, the headset charging compartment can control SY5501 through VIN send instructions to achieve the headphone master switch and reset operation; SY5501 also supports intelligent identification in the warehouse / out of the warehouse state, and actively notify the headset master; SY5501 feature-rich and low power consumption, shortening the Bluetooth headset development cycle. The streamlined QFN14-1.6mm x 1.6mm package saves a lot of space for Bluetooth headset solutions.
apply:
TWS headphones, AR glasses, portable electronics, etc
peculiarity:
VBAT standby current 1uA;
Ship mode current 300nA;
VIN withstand voltage 12V, VIN OVP = 6V, overcurrent protection 450mA;
Charging current ICH pin adjustable, charging current range 10~ 300mA, support 8 levels of percentage adjustment;
Float charge voltage 4.2/4.35/4.4/4.45V four-gear adjustable, accuracy ±0.5%;
Trickle and cut-off current are individually adjustable;
Active recharging, recharging voltage multi-gear adjustable;
Integrated NTC detection, support JEITA temperature range protection;
Integrated rechargeable battery overvoltage, temperature loop, timeout protection;
Integrated discharge battery undervoltage, overcurrent and short circuit protection;
Integrated two-way communication, automatic switching of communication direction, speed up to 3Mbps;
Integrated private protocol instructions, support charging silo through the VIN terminal command control SY5501;
Integrated in the warehouse / out of the position automatic detection function, support the position to send a reset signal and leave the warehouse to send a wake-up signal to the Bluetooth master;
SupportSy I2C control and state reading, interrupt output.
About SY8702
The SY8702 is a low-side overvoltage protection (OVP) IC with an integrated 28mΩ switching NMOS with a low-side switching topology with very low on-resistance effectively reducing the input voltage drop, and external protection voltage settings for more flexible applications, providing the simplest and most practical low-cost OVP solution. The SY8702 is available in sot23-6 package form.
peculiarity:
Overvoltage protection points up to 36V
External setting of the protection voltage point
28mΩ switching NMOS
apply:
Power banks, mobile phones, tablets, power tools, etc
Siyuan Semiconductor has been deeply engaged in the field of power management technology for many years, and is committed to providing leading battery management system-level chip solutions for smart wearables, consumer electronics, industry, energy storage systems, new energy vehicles and other industries, and has also won the dependence of customers. In the future, Svension Semiconductor will launch more product portfolios and better solutions to bring better product experience to consumers around the world.
Source: Svenelectron Semiconductor