SG1843Y-DESC
ActiveCURRENT MODE PWMS ISOLATED SWITCHING REGULATORS OFF-LINE, 8V UVLO - 55°C TO125°C
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SG1843Y-DESC
ActiveCURRENT MODE PWMS ISOLATED SWITCHING REGULATORS OFF-LINE, 8V UVLO - 55°C TO125°C
Technical Specifications
Parameters and characteristics for this part
| Specification | SG1843Y-DESC |
|---|---|
| Clock Sync | False |
| Duty Cycle (Max) | 95 % |
| Frequency - Switching [Max] | 500 kHz |
| Frequency - Switching [Min] | 1 Hz |
| Function | Step-Down |
| Grade | Military |
| Mounting Type | Through Hole |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -55 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 7.62 mm |
| Package / Case | 0.3 in |
| Package / Case | 8-CDIP |
| Qualification | MIL-STD-883B |
| Supplier Device Package | 8-CDIP |
| Synchronous Rectifier | False |
| Topology | Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 30 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 7.6 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Microchip Direct | N/A | 1 | $ 35.28 | |
Description
General part information
SG1843 Series
The SG1842/43 family of control IC's provides all the necessary features to implement off-line fixed frequency, current-mode switching power supplies with a minimum number of external components.
Current-mode architecture demonstrates improved line regulation, improved load regulation, pulse-by-pulse current limiting and inherent protection of the power supply output switch. The band-gap reference is trimmed to ±1% over temperature.
Oscillator discharge current is trimmed to less than ±10%. The SG1842/43 has under-voltage lockout, current limiting circuitry and start-up current of less than 1mA. The totem-pole output is optimized to drive the gate of a power MOSFET. The output is low in the off state to provide direct interface to an N-channel device. The SG1842/43 is specified for operation over the full military ambient temperature range of -55°C to 125°C. The SG2842/43 is specified for the industrial range of -25°C to 85°C, and the SG3842/43 is designed for the commercial range of 0°C to 70°C.
