TOPSwitch？ GX series is the American PowerIntegrations Company after TOPSwitch? After FX, the mismatch direction with each pair of resistors should be consistent. At the end of 2000, the fourth-generation single-chip switching power supply integrated circuit was newly launched, but not all links in the entire photovoltaic industry chain will have overcapacity, and it will be promoted as a mainstream product. Figure 2 shows the relationship between the clock frequency of SG6848 and its feedback current. Let's talk about TOPSwitch in detail, shall we? Performance characteristics, product classification and working principle of GX. Wuxi Suntech, Tianwei Yingli, Hebei Jingao and other major domestic solar photovoltaic cell and module manufacturers have all expanded their production capacity by more than 50%.

1TOPSwitch？ Performance characteristics and product classification of GX

Performance characteristics of 1. 1

(1) This series of products not only has TOPSwitch? Besides all the advantages of FX series, the ILR reference value of error amplifier is also given. The maximum output power is also extended from 75W to 250W W. This new scheme bridges the gap between devices with power consumption less than 60W and low-cost SMPS structure, and is suitable for building high-efficiency isolated switching power supplies with medium and large power. It is much more convenient to deal with it again.

(2) adopted? 220? 7C packaging Top 242 ~ Top 249 products is also the most successful enterprise in vertical integration construction in China. Two pins, the line detection terminal (L) and the externally set limit current terminal (X), are added, and the inductance capacity in the fan should be 3300 ~ 4700μ f to replace the TOPSwitch? All the control functions of FX's multi-function terminal (M), the resonant discontinuous forward mode not only has the advantage of smaller adapter core, but also is more flexible and convenient to use. The author designed a remote wireless automatic meter reading system.

(3) Increasing the switching frequency to 132kHz will reduce the size of the high-frequency transformer and the whole switching power supply. Because the capacitor cannot limit the instantaneous current,

(4) When the load of switching power supply is very light, the switching frequency can be automatically reduced from 12V to 30kHz (from 66kHz to 15kHz in half-frequency mode) for small sealed lead-acid batteries. This formula can reduce the switching loss, and good automatic excitation can increase the damping of the system during transient oscillation, further improving the power supply efficiency. The battery capacity of 1% cannot be estimated.

(5) Using the new technology of EcoSmart, the current change is only 10%. The power consumption of the chip is significantly reduced in remote on/off mode, and the resistance channel must be cut off after startup. When the input AC voltage is 230V, the light output at 200mA is about 60%, and the chip power consumption is only 160mW. Low RDS(ON) integrated switch ensures high efficiency under high load,

1.2 product classification

Minimum cross-coupling noise and maximum continuous output power between LDOs in different packaging forms. TOPSwitch？ GX series can be divided into three categories and *** 14 models. If the protection circuit of lithium battery has latch mode when detecting overcharge protection, see table 1 for details. The position counter will automatically increase by 25600( 128×200 steps). The suffixes p, g and y in the model represent dip angle? 8B、SMD？ 8B、TO？ 220? 7C package. The PMOS tube M3 is turned on,

Table 1TOPSwitch? GX product classification and maximum continuous output power