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18 pcs
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18 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The SL441C from Plessey is a symmetrical burst control integrated circuit housed in an 8-pin DIL package. It is designed to regulate AC power by controlling the number of mains cycles applied to a load within a fixed timing period, making it ideal for room temperature control applications like panel heaters and fan heaters.
Key features include a balanced zero voltage point crossing detector with a spike filter and pulse generator for reliable triac triggering. It also incorporates a period pulse generator and bistable for symmetrical burst control, eliminating half-wave firing. A ramp generator modifies an internal reference voltage, forming a proportional control system with a thermistor. The comparison amplifier includes hysteresis to prevent switching jitter and a spike filter for high immunity to spikes and 50Hz/60Hz interference.
The device can sense thermistor malfunctions, automatically removing power. A supply voltage sensing circuit prevents firing pulses when the supply is inadequate, protecting the triac during switch-on. The SL441C is particularly suited for applications where minimizing radio frequency interference is important, thanks to its zero voltage switching capability.
This component is supplied in an 8-pin Dual In-line Package (DIP) suitable for through-hole mounting.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.99 | $0.99 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The shunt regulating voltage of the SL441C is 14.7 V at 16mA.
The regulated voltage at pin 5 is typically 8.5 V.
The input working voltage range is 0 to 12 V.
The SL441C comes in an 8-DIP package.
The control input bias current is 1 µA.
