Today, in the editor of HaoQiCore Technology, I will give you a detailed introduction to Texas Instruments’ battery management chips, to DC/DC step-down converters, from power modules to systems that support isolation, and all products of cutting-edge GaN.

one，Charging IC products of Texas Instruments

Texas Instruments has further miniaturized the buck-boost battery charger integrated circuit, which can support up to 5A charging, 1-4 rechargeable batteries. It integrates power path management to achieve greater power density, universal and fast charging, and the charging efficiency is as high as 97%. BQ25790 and BQ25792 support high-efficiency charging of USB Type-C and USB Power Delivery (PD) ports in small personal electronic products, portable medical devices and building automation applications. The traditional 5W-10W input port is increased to 100W, and it can be static standby The current is reduced by a factor of 10. In addition, the buck-boost product also supports wireless two-way charging, providing a wider range of voltage adaptation.

Samuel Wong, product line manager of Texas Instruments‘ power management solutions, summarized the four major characteristics of Texas Instruments‘ charging management products.

1. Universal and supports fast charging: supports multiple power sources through the integrated dual-input selector, including wireless, USB, barrel jack and solar charging, suitable for 3.6 V to 24 V applications.

2. The power density is increased by 50%: it has a power density of 155 mW/mm2, which is 2 times higher than the market. "You won‘t feel any heat during the entire charging process." Samuel emphasized.

3. Extend battery running time: TI‘s first buck-boost battery charger with a quiescent current of less than 1 µA supports multiple cells, and the storage time is extended by 5 times. 1μA means that when the product is in storage, the power consumption is only 0.05%.

4. Design flexibility: By integrating MOSFET, battery FET, current detection circuit and dual-input selector, the solution size and bill of materials are reduced.

tow，Stacked DC/DC step-down converter of Texas Instruments

Texas Instruments‘ first new 40-A SWIFT DC/DC buck converter that can stack up to four integrated circuits is the second new product introduced by Samuel. The buck converter is designed for high current, FPGA or processor design, and can provide up to 160A output current through 4 stacks at an ambient temperature of 85°C, which is four times higher than other power integrated circuits on the market. The switching frequency is up to 1.5 MHz. Among the many 40A DC/DC converters, TPS546D24A is more efficient and can be used in high-performance data centers, enterprise computing, medical, wireless infrastructure, and wired network applications. Combining the five characteristics of power supply, Samuel gave four characteristics of TPS546D24A.

1. The power supply is smaller. It adopts a 5mm×7mm flat point, QFN package without pins. At the same time, by integrating peripheral components, it can reduce up to 6 external compensation components in the circuit board.

2. It has better thermal performance, achieving a low thermal resistance of 8.1°C/W, and operating temperature 13°C lower than other DC/DC converters. According to statistics, every 1°C increase in heat loss will waste 1% more efficiency, so a reduction of 13°C can reduce a lot of energy costs for companies.

3. Improve efficiency at high switching frequency. The product uses 0.9-mΩ low-side MOSFET, which is 3.5% more efficient than other DC/DC step-down converters.

4. It is high-precision, the output voltage error is less than 1%, with pin multiplexing configurability, can realize more accurate monitoring of current, support PMBUS can provide timely fault reports.

Third, the power module solution of Texas Instruments

Texas Instruments introduced the industry‘s smaller 36V, 4A power module TPSM53604DC/DC step-down module in a quad flat no-lead package (QFN), with an area of ​​5mm x 5.5mm, integrated inductance, and can support up to 95% efficiency and a total area of With a single-sided layout design of 85mm2, the size of the power supply is reduced by 30%, and the power loss is reduced to 50% of other similar modules. At the same time, the product is equipped with a thermal pad to optimize heat transfer.

The TPSM53604 can operate at an ambient temperature of up to 105°C and can support rugged applications in the fields of factory automation and control, grid infrastructure, test and measurement, industrial transportation, aerospace, and defense.

By pairing TPSM53604 with compact step-down modules (such as TPSM82813 and TPSM82810), engineers can create a complete power solution from 24-V input to the point of load, while minimizing design time and effort.

1. The product feature is that the power supply is smaller and simpler, and it is a smaller solution suitable for 24V, 4A industrial applications in the standard QFN package.

2. Efficient heat dissipation and efficient heat transfer enable it to operate at an ambient temperature of up to 105°C.

3. It is an EMI optimized design that meets the CISPR 11 Class B standard.

Fourth, Texas Instruments‘ isolated DC-DC converter

The isolated DC-DC converter UCC12050 is developed using a new proprietary integrated transformer technology. It is a 500mW high-efficiency isolated DC/DC converter with lower electromagnetic interference in the industry. Its 2.65mm height can reduce the size of the solution (80% compared with discrete solutions and 60% compared with power modules), and its efficiency is twice that of similar products in the market. UCC12050 is specially designed to improve industrial performance. Its 5kVrms reinforced isolation and 1.2kVrms working voltage can prevent high-voltage peaks in the system (such as industrial transportation, power grid infrastructure and medical equipment).

The product has three major features: 1. Improved power density, efficiency and power density are twice that of similar devices in the market.

2. The integrated transformer has lower primary to secondary capacitance, which optimizes EMI performance.

3. Enhanced isolation and wide temperature range improve the reliability of the product. Reinforced isolation with 8-mm creep and gap is used to protect and resist the ground potential difference.

Five, Texas Instruments‘ progress on gallium nitride

As we all know, the switching speed of GaN is faster, up to 2MHz or even above 10MHz, so it can achieve higher conversion efficiency, so many power management manufacturers have begun to engage in the industrialization of third-generation semiconductors.

Currently, Texas Instruments gallium nitride FETs products mainly include 150mΩ, 70mΩ and 50mΩ gallium nitride. In 2017, Texas Instruments and Siemens simultaneously demonstrated the industry‘s first 10-kilowatt cloud grid connected to gallium nitride products. Recently, Texas Instruments also announced its independent research and development of a bidirectional AC/DC platform that achieves 900V and 5000W through convection cooling. In the future, it will be a breakthrough for gallium nitride in the field of on-board charging, grid charging and solar energy.

Summary: From Texas Instruments’ battery management chips, to DC/DC step-down converters, from power modules to systems that support isolation, and cutting-edge gallium nitride, we can see that all of Texas Instruments’ products continue to be close to customers and develop To develop new technologies that meet the needs of the industry.