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Current Mode PWM Controller
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UC1843J/883 Product Details
The UCx84x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. The internally implemented circuits include an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator that also provides current-limit control, and a totem-pole output stage that is designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.
The UCx84x family offers a variety of package options, temperature range options, choice of maximum duty cycle, and choice of turnon and turnoff thresholds and hysteresis ranges. Devices with higher turnon or turnoff hysteresis are ideal choices for off-line power supplies, while the devices with a narrower hysteresis range are suited for DC-DC applications. The UC184x devices are specified for operation from –55°C to 125°C, the UC284x series is specified for operation from –40°C to 85°C, and the UC384x series is specified for operation from 0°C to 70°C.
- Optimized for Off-Line and DC-to-DC Converters
- Low Start-Up Current (< 1 mA)
- Automatic Feedforward Compensation
- Pulse-by-Pulse Current Limiting
- Enhanced Load-Response Characteristics
- Undervoltage Lockout With Hysteresis
- Double-Pulse Suppression
- High-Current Totem-Pole Output
- Internally Trimmed Bandgap Reference
- Up to 500-kHz Operation
- Error Amplifier With Low Output Resistance
- Tape & Reel (TR)/Cut Tape (CT)/Tray/Tube
- RoHs Status
- Lead free/RoHS Compliant
UC1843 Family Datasheet
UC1843J/883 Related Products
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Estimated Delivery Time: May 17 - May 22 days (choose Expedited at checkout).
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All the products will packing in anti-staticbag. Ship with ESD antistatic protection.
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1.We provide 90 days warranty.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
- Q: How does Jotrin guarantee that UC1843J/883 is the original manufacturer or agent of TI?
- We have a professional business development department to strictly test and verify the qualifications of TI original manufacturers and agents. All TI suppliers must pass the qualification review before they can publish their UC1843J/883 devices; we pay more attention to the channels and quality of UC1843J/883 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
- Q: How to find the detailed information of UC1843J/883 chips? Including TI original factory information, Semiconductors ; Power management ; Offline & isolated DC/DC controllers & converters application, UC1843J/883 pictures?
- You can use Jotrin's intelligent search engine, or filter by Semiconductors ; Power management ; Offline & isolated DC/DC controllers & converters category, or find it through Texas Instruments, Inc Information page.
- Q: Are the TI's UC1843J/883 price and stock displayed on the platform accurate?
- The TI's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for UC1843J/883, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
- Q: What is the process for returns or replacement of UC1843J/883?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment.
If there is something wrong with the UC1843J883 we delivered, we will accept the replacement or return of the UC1843J/883 only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of UC1843J/883.
(3)The UC1843J/883 is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
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