Allicdata Part #: | SG3845M-ND |
Manufacturer Part#: |
SG3845M |
Price: | $ 0.00 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | Microsemi Corporation |
Short Description: | IC REG CTRLR FLYBACK 8DIP |
More Detail: | Flyback Regulator Positive, Isolation Capable Outp... |
DataSheet: | SG3845M Datasheet/PDF |
Quantity: | 1000 |
1 +: | 0.00000 |
Frequency - Switching: | 1Hz ~ 500kHz |
Base Part Number: | SG*845 |
Supplier Device Package: | 8-DIP |
Package / Case: | 8-DIP (0.300", 7.62mm) |
Operating Temperature: | 0°C ~ 70°C (TA) |
Control Features: | -- |
Serial Interfaces: | -- |
Clock Sync: | No |
Synchronous Rectifier: | Yes |
Duty Cycle (Max): | 48% |
Series: | -- |
Voltage - Supply (Vcc/Vdd): | 7.6 V ~ 30 V |
Output Phases: | 1 |
Number of Outputs: | 1 |
Topology: | Flyback |
Output Configuration: | Positive, Isolation Capable |
Function: | Step-Up/Step-Down |
Output Type: | Transistor Driver |
Part Status: | Active |
Packaging: | Tube |
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The SG3845M, a switching controller IC designed by STMicroelectronics, is part of the company\'s Power Management IC (PMIC) family and is classified as one of its DC DC switching controllers. It is designed to operate as a low side driver in multiple-output buck power conversion systems, such as off-line switches and DC to DC converters. As its product name suggests, the SG3845M can be used to experience power efficiency, precise control and a high consumer safety level in devices it is employed in. This article examines the application field, working principle and the other features of the SG3845M.
Application field
The SG3845M can be employed in any power supply design which requires a precise single or multi-phase step-down voltage regulation mechanism. It is also used in applications including isolated or non-isolated DC to DC converters with multiple output supplies, as well as off-line switches. The SG3845M can also be used to regulate auxiliary power supplies such as standby or standby/onoff supplies, where it is employed in order to provide a high efficiency and a very high level of consumer safety. Furthermore, the SG3845M should be a the best choice for applications where precise voltage regulation and low power loss are both required.
Working principle
The working principle behind the SG3845M is that it contains a two-mode regulator, a single terminal under voltage lock-out (UVLO) comparator and a single-shot driver. These three features enable the device to control the internal power switches in multiple-output buck supply systems and achieve precise voltage regulation and low power loss. The two-mode regulator ensures that the SG3845M can perform effective power conversion in single or multi-switching system circuits. The UVLO comparator and single-shot driver further add to the efficiency of the device by providing precision power control over the voltage output, resistor networks and the switching speed.
Features
The SG3845M is designed to meet the demands of high performance power supplies with its integrated architecture. The device features both an adjustable, low side MOSFET driver and a low side Gate Driver. The controller IC also has additional features such as an adjustable current-limit frequency and a thermal regulation shutdown circuitry. For ease of implementation, the SG3845M also includes an interface that enables programming of the switching frequency without the need for external components. The other features of the device include a 1MHz non-dispersive on-time precision and a 0.5V voltage reference accuracy.
Conclusion
In summary, the SG3845M switching controller IC is an integrated low side driver designed to provide precise power regulation and low power loss in multiple output buck supply systems, such as those found in off-line switches and DC to DC converters. It is equipped with features such as adjustable current-limits, voltage reference accuracy and thermal regulation, which make it the most suitable for applications requiring efficient power conversion and precise voltage regulation. Its integrated architecture is designed to meet the demands of high performance power supplies, making it a popular choice for many power supply designs.
The specific data is subject to PDF, and the above content is for reference
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