YUEQING WEIMAI ELECTRONICS CO.,LTD , https://www.weimaicarconn.com
The target users of the SGM2100 are handheld devices such as GPS, digital cameras, and PMPs. Xu Qianjiang said: "Similar handheld device customers, many will use Samsung, Marv el l processor, and SGM2100 can be well matched with it." SGM2100 integrates an LCD panel backlight channel, can directly support ten white LEDs In series, the voltage can rise to 35V, which is very rare in the power management unit. Xu Qianjiang said: When the screen of the portable product is increased to seven inches or 8 inches, the uniformity of the backlight is put forward. At this time, a series backlight scheme is needed, and a single DC/DC channel supports 10 LEDs. Tandem is very difficult, SGM2100 can do this, which is very meaningful for large GPS and PMP products. "The SGM2100 also has an overvoltage protection function to prevent damage to the chip caused by excessive voltage caused by LED disconnection."
In addition to this unique backlight channel, there is also a master synchronous buck type DC/DC path in the seven-way DC/DC, which can always increase the battery voltage to 5V, 2A output capability. For the car GPS customer, the output sound is required to be large, and the audio power amplifier needs to have a strong amplification capability. At this time, the 5V channel is used to directly supply power to the audio power amplifier, in addition to providing a larger volume, due to the radio frequency portion. The power supply is separate and does not cause interference with the audio output due to the GSM module. In addition, it can supply power to the USBOTG interface that requires 5V, and the display panel that needs 5V. Since it has 2A output current, these power supplies can be simultaneously performed. In addition, the channel can be combined with any other buck-type circuit to complete a simple buck-boost design to achieve a buck-boost circuit that would otherwise require four MOSFETs. This simple implementation can help customers save a lot of money. For example, a micro hard disk that requires a 3.3V voltage supply requires such an analog buck circuit. 3.3V is just in the middle range of the battery voltage change. Therefore, when the battery voltage becomes large or small, a corresponding buck or Boost, in addition, will require a large current when the micro hard disk is just started, and the output current of the path 2A can also be well supported.
In addition, the SGM2100 also has a three-buck type circuit for powering the CPU's VCORE and VIO. It also has a buck-type circuit with an external MOSFET that can supply a large current, for complex products with many peripherals. In addition, the SGM2100 has two ways to lift and lower pressure. Since many display panels do not have VON and VOFF generators integrated, it is necessary to add a voltage, and VON is generally 15V, VOFF is generally -8V, then the power supply path needs to have a buck-boost function. In addition, in digital camera applications, the CCD image sensor must require a bias voltage of -8V, and the -8V voltage that the SGM2100 can provide is very useful.
Xu Qianjiang said: It is not easy to integrate multiple DC/DCs. To overcome the problem of heat and multi-channel DC/DC interference, SGM2100 is a highlight of Shengbangwei.
And for many GPS customers who don't need VON and VOFF generators, Shengbang will further introduce a 5-way DC/DC power management unit, the SGM2101, which does not provide VON and VOFF voltages.
In addition to the SGM2100, another highlight of Shengbang is its Class AB audio amplifier with high voltage rejection ratio, low power consumption and low distortion. Shengbang has launched 6 models in three months according to customers' needs. Class AB amplifiers with different interfaces are mainly used for handheld devices such as mobile phones.
Last year, Shengbang launched more than 30 products, which is a very good achievement among domestic manufacturers, which is inseparable from the development of Shengbangwei. Xu Qianjiang introduced: "Shengbang is starting from the most difficult products, and it is easy to launch products after the first difficulty. For example, SGM2100 can be regarded as a platform product of Shengbang in the portable power management unit. On this basis, many can be derived. Different products, such as SGM2101.†He also said: “This way we may spend more time in the early stage, but the speed of launching new products will be faster and faster.â€
According to the current situation of domestic analog IC design companies, Xu Qianjiang said: "The number of local analog IC design companies is small, and the excellent ones are more limited." For the reason, he said: "The analog IC design needs a long time to accumulate, and a good designer is needed. Good market personnel, good product planning is also very important, and it is necessary to have a clear product roadmap. It is more difficult to have these at the same time. Compared with other domestic companies, Shengbang Microelectronics has done a better job in these aspects. it is good."
Finally, Xu Qianjiang said: "I hope that domestic manufacturers and customers can use or try more products of domestic IC companies including Shengbang. In fact, after many customers have verified the reliability and consistency of Shengbang products. It is very good.†He also said: “Shengbang’s concerns about these customers are also very understandable, because the risks are what every customer wants to avoid, but Shengbang’s products have been used by many domestic manufacturers. It is hoped that the resulting demonstration effect will encourage more manufacturers to use the products of domestic IC companies including Shengbang." 
In fact, Shengbang Microelectronics has indeed achieved this goal. SGM's low-power, low-noise, audio CMOS operational amplifier SGM721, introduced in 2006, has outperformed many foreign companies' op amps due to its high performance and low price. Shengbang Microelectronics once again proved this at IIC2008. The company introduced a seven-channel, high-efficiency DC/DC power management unit, the SGM2100. According to Xu Qianjiang, strategic marketing manager of Shengbang Microelectronics, “SGM2100 integrates seven. Road DC/DC, such performance is very leading in the world."