| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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14,108 pcs
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14108 pcs | On Request | 1 | On Request | On Request | 10+ | On Request | On Request | |
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9,171 pcs
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9171 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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The UC2843N from Texas Instruments is a current-mode Pulse Width Modulation (PWM) controller IC. It is optimized for use in off-line and DC-to-DC converters, offering features necessary for fixed-frequency current-mode control schemes with minimal external components.
Key electrical specifications include an operating voltage range of 12V to 28V and an operating frequency of up to 500kHz. The device supports multiple topologies such as Boost, Buck, Buck-Boost, Flyback, and Forward. It features a maximum duty cycle of 97% and includes control features like frequency control.
This controller IC has a low start-up current of less than 1mA and incorporates automatic feedforward compensation, pulse-by-pulse current limiting, enhanced load-response characteristics, undervoltage lockout with hysteresis, and double-pulse suppression. The output stage is a high-current totem-pole design suitable for driving N-channel MOSFETs.
The UC2843N is available in an 8-PDIP through-hole package. It operates within an ambient temperature range of -40°C to 85°C. The part is noted as 'Not Recommended for New Designs'.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.88 | $0.88 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The UC2843N operates from 12V to 28V.
It supports boost, buck, buck-boost, flyback, and forward topologies.
The maximum switching frequency is 500kHz.
The operating temperature range is -40°C to 85°C.
It is available in an 8-PDIP through-hole package (8-DIP, 0.300", 7.62mm).
Yes, it includes undervoltage lockout with hysteresis.
The maximum duty cycle is 97%.