| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
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1,026 pcs
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1026 pcs | On Request | 1 | On Request | On Request | 10+ | On Request | On Request |
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| Clock Sync | |
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| Duty Cycle (Max) | |
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| Synchronous Rectifier | |
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| Voltage |
The UC3843N from On Semiconductor is a fixed-frequency, current-mode Pulse Width Modulation (PWM) controller. It is optimized for off-line and DC-to-DC converter applications, requiring minimal external components. This controller operates at frequencies up to 500kHz and supports a supply voltage range of 7.6V to 30V.
Key features include a low start-up current of less than 1mA, undervoltage lockout with hysteresis, and a maximum duty cycle of 97%. The UC3843N provides pulse-by-pulse current limiting and features a high-current totem-pole output stage suitable for driving N-channel MOSFETs. Its internal circuitry includes a trimmed oscillator for precise duty cycle control and a temperature-compensated reference.
This device is available in an 8-DIP (Dual In-line Package) through-hole mounting style. The operating temperature range is 0°C to 70°C (TA). The UC3843N is suitable for applications requiring efficient power conversion with a compact design.
Note: The provided datasheet filename references UC3844, not UC3843. Compliance data (RoHS, REACH, MSL) is based on precomputed data with low confidence and requires verification.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.78 | $0.78 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The supply voltage range is 7.6V to 30V.
The UC3843N is available in an 8-DIP (0.300", 7.62mm) package.
The operating temperature range is 0°C to 70°C.
The output current is ±1A.
The switching frequency is programmable up to 500kHz.
It supports boost and flyback topologies.
Yes, it has undervoltage lockout with hysteresis. The UVLO thresholds are 8.5V on and 7.9V off.