Preface
With the continuous improvement of the fast charging power of mobile devices, fast charging of more than 100 watts has become a standard feature of many mobile phones. However, due to this, higher requirements have been put forward for the design of power adapters, and how to improve the power density of adapters has become a problem that every developer has to face.
In the past, the step-down circuit required multiple components such as buck chips, power MOS, and protocol chips, which took up a large board space, while the step-down SOC chip not only has the ability to convert high input voltage to lower output voltage, but also has a variety of built-in fast charging protocols and power MOS to provide continuous and stable power supply for various electronic devices, which can be said to be a core to solve all problems.
Digital display car charger built-in step-down SOC chip case
The charging head network has sorted out a batch of digital display car charging application cases with built-in step-down SOC chips, and some parameters of the three step-down SOC chips that appear in the article are shown in the figure.
Yingjixin IP6537
Yingjixin IP6537 is a step-down SoC chip that integrates a variety of fast charging protocols, using QFN-24 package, integrating synchronous step-down converter inside the chip, supporting USB PD3.0 fast charging, supporting QC2.0/3.0, supporting Huawei FCP/SCP fast charging protocol, supporting MTK PE fast charging, supporting Samsung AFC fast charging, and supporting SFCP fast charging.
IP6537 has a built-in power MOS, supports 32V working voltage, and has an input withstand voltage of 40V, which meets the requirements of USB PD fast charging multi-port step-down and 24V car charging applications, with a maximum output power of 30W. The chip has built-in input over-voltage, input under-voltage, and output over-current/short-circuit protection, and supports overtemperature protection function. The CC pin has built-in over-voltage protection and a withstand voltage of 30V, which effectively prevents the damaged data line from causing damage to the finished product. The IP6537 step-down chip is suitable for car charging, USB PD fast charging, and smart socket applications, providing a small-size, high-performance, and high-integration step-down solution. The output line repair function is used to compensate for line loss and improve the fast charging speed.
Application examples
Jile Tang 70W dual USB-C digital display car charger
The dual USB-C port car charger launched by Jile Tang has a total output power of 70W and a single USB-C port output power of 35W, which can quickly charge two devices at the same time to meet the charging needs of two mobile phones at the same time. In addition, this car charger also has a built-in digital display voltmeter, which supports the display of car battery voltage. The output side of the car charger adopts a silver decorative panel, and the voltmeter can be displayed in the middle of the panel, which is a whole when the power is not on, which is very beautiful.
Related Reading:
Teardown report: Jiletang 70W dual USB-C digital display car charger
Yingjixin IP6538
Yingjixin IP6538 is a fully integrated fast charging SOC buck chip, using QFN-32 package, integrated synchronous buck converter, supporting USB PD3.0 fast charging, supporting QC2.0/3.0, supporting Huawei FCP/SCP fast charging protocol, supporting Samsung AFC fast charging, supporting VOOC fast charging and SFCP fast charging. Built-in power MOS, upper tube conduction resistance 9 mOhm, down tube conduction resistance 8 mOhm, fixed working frequency 150KHz.
IP6538 supports 32V working voltage, input withstand voltage 40V, meets USB PD fast charging multi-port step-down and 24V car charging applications, with a maximum output power of 45W. The chip has built-in input over-voltage, input under-voltage, and output over-current/short-circuit protection, and supports overtemperature protection function. The data pin has built-in over-voltage protection and a withstand voltage of 30V, which effectively prevents the damaged data cable from causing damage to the finished product. The IP6538 step-down chip is suitable for car charging, USB PD fast charging, and smart socket applications, providing a small-size, high-performance, and high-integration step-down solution. The output line repair function is used to compensate for line loss and improve the fast charging speed.
Application examples
机乐堂带点烟器150W USB-C数显车充
The car charger launched by Ji Le Tong is designed with a black shell and supports the expansion of the cigarette lighter, which is convenient and practical. The car charger has three output interfaces of 2C1A, of which each USB-C port supports 30W output, with a total output power of 60W, and the cigarette lighter interface supports a maximum output power of 90W. The car charger panel has a built-in LED digital tube, which supports battery voltage display, which is convenient to know the battery voltage status at any time and avoid over-discharge affecting driving.
Related Reading:
Teardown report: 150W USB-C digital display car charger with cigarette lighter
智融SW3517S
Zhirong SW3517S is a step-down protocol IC with QFN-39 package, which is a highly integrated multi-fast charging protocol dual-port charging chip. It supports fast charging output at any port of A+C port, and supports independent current limit of dual ports. It integrates a 5A high-efficiency synchronous step-down converter, built-in power MOS, supports PPS, PD, QC, AFC, FCP, SCP, PE, SFCP and other fast charging protocols, with a maximum output PD of 100W (20V5A), CC/CV mode, and dual-port management logic. Only a small number of peripheral components are needed to form a complete high-performance multi-fast charging protocol dual-port charging solution.
Application examples
Junkaida 101W 2C1A Digital Display Car Charger B5
Junkaida has launched a 101W high-power fast charging car charger, this car charger has a 2C1A interface, USB-C2 interface uses buck-boost circuit, 12V or 24V input supports 65W fast charging output, and supports 65W+36W output power when the dual ports are used at the same time, which can easily meet the fast charging of laptops and mobile phones in the car at the same time. The car charger has a built-in OLED screen, which can display the output voltage, output current and output power of each interface in real time, and know the charging status of the device at all times through the car charger.
Related Reading:
Teardown report: Jun Kaida 101W 2C1A digital display car charger B5
Summary of the charging head network
The charging head network learned that the three chips mentioned in the article are highly integrated fast charging SOC step-down chips, support a variety of fast charging protocols, built-in power MOS and other key components, and provide high-performance and high-integration solutions for car charging, USB PD fast charging and intelligent socket applications. Compared with traditional solutions, step-down SOC chips are not only more compact in size, but also can help manufacturers improve power density and efficiency, and also have multiple protection functions to ensure the safety of equipment and users.
The high level of integration and multi-protocol support of buck SOC chips will provide greater flexibility and convenience in the design of fast charging devices, while reducing cost and board space. It is foreseeable that with the continuous iterative upgrading of fast charging technology, SOC chips will become the mainstream solution for fast charging equipment in the future, promoting the entire fast charging industry to move towards a more efficient, light and thin development direction.