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The MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487 are low-power transceivers for RS-485 and RS422 communication. Each part contains one driver and one receiver. The MAX483, MAX487, MAX488, and MAX489 feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX481, MAX485, MAX490, MAX491, and MAX1487 are not limited, allowing them to transmit up to 2.5Mbps. These transceivers draw between 120µA and 500µA of supply current when unloaded or fully loaded with disabled drivers. Additionally, the MAX481, MAX483, and MAX487 have a low-current shutdown mode in which they consume only 0.1µA. All parts operate from a single 5V supply. Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit. The MAX487 and MAX1487 feature quarter-unit-load receiver input impedance, allowing up to 128 MAX487/ MAX1487 transceivers on the bus. Full-duplex communications are obtained using the MAX488–MAX491, while the MAX481, MAX483, MAX485, MAX487, and MAX1487 are designed for half-duplex applications
The BP3286J is a high-efficiency, high-PF LED driver chip that supports SCR dimming. Operating in inductor current critical continuous mode, it is suitable for Buck-Boost LED driver power supplies. The BP3286J integrates a 600V power switch and employs a patented gate drive and high-voltage power supply method, requiring very few external components to achieve excellent constant current characteristics, significantly reducing system cost and size. The BP3286J features multiple protection functions, including LED open-circuit protection (overvoltage protection), LED short-circuit protection, and chip temperature overheating regulation. The BP3286J is packaged in an SOP-8 package.
RZC7512It is dual channelUSBDedicated charging port (DCP)(BC1.2) controller. With automatic detection feature, it monitorsUSBThe MCU automatically
detects the data line voltage and automatically provides the correct voltage characteristics on the data line to provide compatible charging for the following
dedicated charging configurations:
1. Apple Divider DCP, requiringD+andD-Apply to the line2.7VVoltage
2. BC1.2 DCP, requiringD+Short circuit toD-line
3.China Telecom StandardYD/T 1591-2009Short-circuit mode requiresD+Short circuit toD-line
4. Samsung DCP,RequireD+Line andD-The voltage on the line is1.2V
The SD4947 is a DC-DC converter control chip for buck switching power supplies, driving external MOSFETs. The SD4947 features integrated high-voltage supply for fast startup, adaptive frequency reduction to further optimize conversion efficiency under light load conditions, and built-in frequency dithering to optimize EMI. The SD4947 also integrates various abnormal state protection functions, including: cycle-by-cycle peak current protection, VDD overvoltage protection, undervoltage protection, output overload protection, output overvoltage protection, and overtemperature protection.
Power Management (PMIC)/DC-DC Converters
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