SG1844Y-DESC
ActiveCURRENT MODE PWMS ISOLATED SWITCHING REGULATORS OFF-LINE, 16V UVLO-55°C TO125°C
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SG1844Y-DESC
ActiveCURRENT MODE PWMS ISOLATED SWITCHING REGULATORS OFF-LINE, 16V UVLO-55°C TO125°C
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | SG1844Y-DESC |
|---|---|
| Control Features | Frequency Control |
| Duty Cycle | 48 % |
| Fault Protection | Current Limiting |
| Frequency - Switching [Max] | 500 kHz |
| Frequency - Switching [Min] | 100 Hz |
| Internal Switch(s) | False |
| Mounting Type | Through Hole |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -55 °C |
| Output Isolation | Isolated |
| Package / Case | 7.62 mm |
| Package / Case | 0.3 in |
| Package / Case | 8-CDIP |
| Supplier Device Package | 8-CDIP |
| Voltage - Start Up | 16 V |
| Voltage - Supply (Vcc/Vdd) [Max] | 30 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 10 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 | $ 44.94 | |
Description
General part information
SG1844 Series
The SG1844/45 family of control ICs provides all the required 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 Bandgap reference is trimmed to ±1% over temperature. Oscillator discharge current is trimmed to less than ±10%. The SG1844/45 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 Nchannel device. Both operate up to a maximum duty cycle range of zero to <50% due to an internal toggle flip-flop which blanks the output off every other clock cycle. The SG1844/45 is specified for operation over the full military ambient temperature range of -55°C to 125°C. The SG3844/45 is designed for the commercial range of 0°C to 70°C.
**Microchip Ordering Part** [**Standard Microcircuit Drawing (SMD)**](https://ww1.microchip.com/downloads/en/DeviceDoc/00003952.pdf)
Documents
Technical documentation and resources