Features and Applications of SGM3727/SGM3729 Power Management IC

MOS power IC full range

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

TP-IP4220CZ6 5V 0.35PF breakdown voltage 6V SOT

Shunuo varistor / ESD varistor / product complete / Sunlord first-class agent

100V, 250mA, surface mount, high speed switching diode

Power supply design has changed dramatically from the semiconductor industry with the rapid evolution of the semiconductor industry. Discrete devices have increasingly been integrated into a few key devices. The purpose of the design has shifted from the previous implementation of basic functions to the current portable, mobile, secure and high performance. Efficient, miniaturized, high power density and high reliability have become the challenges of many R&D engineers.

Lu Liang, product line manager of Shengbang Microelectronics Co., Ltd. pointed out that power devices, as a key component of the semiconductor industry, have always played an important role in social and economic development, and their market sentiment index has also fluctuated following fluctuations in the economic cycle. Power devices are often subdivided into power discrete devices and power management ICs. From small personal entertainment products to metallurgical industries involving the national economy and the people's livelihood, power devices are widely used. Higher power density, reliability, efficiency and smaller size have been the trend of power devices. As an integral part of power devices, power management ICs have well explained their technological development trends in recent years. As the leader of power devices, European and American companies have always valued the development of the Chinese market. More and more emerging semiconductor companies are also entering or have entered this promising field.

Shengbang Microelectronics has started the layout of power management ICs since 2007: from seemingly simple LDOs to small and efficient switching regulators, there are already several product types available. The reliability and consistency of power management ICs has always been the foundation of Shengbang Microelectronics in the market application field and the basis accepted by customers. In the planning of subsequent power management products, small package, high efficiency, high integration, and high power density are gradually being realized. For example, a small-sized LDO SGM2035 with a 1.6mm×1.6mm package has an output current of 500mA. Widely recognized in a variety of product applications; series LED driver IC SGM3727/9 (Figure 1) with an output voltage of up to 38V and capable of driving 10 LEDs, in line with the market miniaturization requirements, TDFN is packaged in a 2mm × 2mm ultra-thin shrink package , has been shipped in bulk on the market. Since 2011, Shengbang Microelectronics has begun to enter the high-pressure market. The breadth and depth of the product line is an advantage over other vendors.

Figure 1: Internal block diagram of the SGM3727.

Meeting the many challenges in power supply design is no longer a unilateral task for end product development engineers, and many semiconductor companies have introduced generations of power solutions. Lu Liang emphasized that Shengbang Microelectronics has made a series of attempts in IC integration, power density, high efficiency, IC miniaturization and application range (wide voltage, high current) for the main challenges of current power supply design. Launched a range of products that are popular with developers.

The SGM3727/9 is one of the high-voltage product lines launched by Shengbang Microelectronics in 2011, which greatly saves the customer's PCB design size space. With a switching frequency of more than 1MHz, the peripheral inductors use a smaller 2.2uH or 4.7uH general-purpose product, which can achieve efficiencies higher than 83% (10-lamp series boost application, 3.8V input voltage) (Figure 2). OVP can be flexibly configured to give users the convenience of production cost and material management.

Figure 2: SGM3727 external wiring diagram and LED current/efficiency curve.

A wide range of power management ICs and a wide market coverage are indispensable product areas for any analog semiconductor company. Lu Liang finally said that relying on the existing product system, Shengbang Microelectronics will further develop in the field of LED backlight, DC/DC, LDO and PMU. In response to the market's small size, high power density, high efficiency, and high integration requirements, more power management ICs that are suitable and can help users optimize the characteristics of existing products will be developed. Currently, power management products developed by Shengbang Microelectronics It has been widely used in many fields such as mobile phones, digital cameras, notebook computers, automotive electronics, industrial control and military defense.