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High Performance Current Mode Controllers
| Hersteller : | STMicroelectronics, Inc |
|---|---|
| Verpackung/Behälter : | SOP-8 |
| Produkt der Kategorien : | Power Management ; AC-DC Converters ; PWM Controllers |
| Datasheet: | UC2843B Datasheet (PDF) |
| RoHs Status: | Lead free / RoHS Compliant |
| Lagerbestand: | 188 |
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UC2843B Beschreibung
The UC284xB family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off-state.
Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges. The UC2842B and UC2844B have UVLO thresholds of 16V (on) and 10V (off), ideally suited off-line applications The corresponding thresholds for the UC2843B and UC2845B are 8.5V and 7.9V. The UC2842B and UC2843B can operate to duty cycles approaching 100%. A range of the zero to < 50 % is obtained by the UC2844B and UC2845B by the addition of an internal toggle flip flop which blanks the output off every other clock cycle.
Feature
- LOWSTART-UPANDOPERATINGCURRENT
- UNDERVOLTAGELOCKOUTWITHHYSTERESIS
- INTERNALLYTRIMMEDREFERENCEWITHUNDERVOLTAGELOCKOUT
- CURRENTLIMITING
- TRIMMEDOSCILLATORFORPRECISEFREQUENCYCONTROL
- CURRENTMODEOPERATIONTO500kHz
- OSCILLATORFREQUENCYGUARANTEEDAT250kHz
- LATCHINGPWMFORCYCLE-BY-CYCLE
- HIGHCURRENTTOTEMPOLEOUTPUT
- AUTOMATICFEEDFORWARDCOMPENSATION
(Bild: Diagram)
Technische Parameter
- Grade
- Industrial
- Input duty cycle voltage (V) min
- 8.2
- Input duty cycle voltage (V) max
- 30
- Output Current Max (A) nom
- 1
- Regulated Output Voltage (V) min
- -
- Regulated Output Voltage (V) max
- -
- Regulator Switching frequency max
- 500
- Max Duty Cycle (%) typ
- 100
- Topology
- Current Mode
- Synchronize Frequency
- false
- Current Limiting Mode
- pulse
- Disable Pin
- false
- Stand by Pin
- false
UC2843B Datasheet
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UC2843B
UC2843B Äquivalente Teile
Für die UC2843B-Komponente können Sie diese Ersatz- und Alternativteile in Betracht ziehen.
| Models | Hersteller | Verpackung/Behälter | Beschreibung |
|---|---|---|---|
| UC3843 | ON | DIP8 |
UC2843B Verwandte besondere
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Fracht
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- Lead Time
- DHL
- $20.00-$40.00 (0.50 KG)
- 2-5 days
- Fedex
- $20.00-$40.00 (0.50 KG)
- 3-7 days
- UPS
- $20.00-$45.00 (0.50 KG)
- 2-5 days
- TNT
- $25.00-$65.00 (0.50 KG)
- 2-5 days
- EMS
- $25.00-$45.00 (0.50 KG)
- 5-14 days
- REGISTERED AIR MAIL
- $2.00-$3.00 (0.10 KG)
- 7-30 days
Processing Time：Shipping fee depend on different zone and country.
Zahlung
- Zahlungsbedingungen
- Hand Fee
- Wire Transfer
- charge US$30.00 banking fee.
- Paypal
- charge 4.0% service fee.
- Credit Card
- charge 3.5% service fee.
- Western Union
- charge US$0.00 banking fee.
- Money Gram
- charge US$0.00 banking fee.
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Mindestbestellmenge beginnt 1pcs.
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90 Tage Qualitätsgarantie für alle Produkte.
Verpackung
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Step1: Products
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Step2: Vacuum Packaging
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Step3: Anti-Static Bag
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Step4: Individual Packaging
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Step5: Packaging Boxes
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Step6: Bar-Code Shipping Tag
All the products will packing in anti-staticbag. Ship with ESD antistatic protection.
Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.
We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.
After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.
Garantien
1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.
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.
FAQ:
- Q: How does Jotrin guarantee that UC2843B is the original manufacturer or agent of ST?
- We have a professional business development department to strictly test and verify the qualifications of ST original manufacturers and agents. All ST suppliers must pass the qualification review before they can publish their UC2843B devices; we pay more attention to the channels and quality of UC2843B products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
- Q: How to find the detailed information of UC2843B chips? Including ST original factory information, Power Management ; AC-DC Converters ; PWM Controllers application, UC2843B pictures?
- You can use Jotrin's intelligent search engine, or filter by Power Management ; AC-DC Converters ; PWM Controllers category, or find it through STMicroelectronics, Inc Information page.
- Q: Are the ST's UC2843B price and stock displayed on the platform accurate?
- The ST's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for UC2843B, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
- Q: Can I place an order offline?
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Yes. We accept offline orders.
We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online. - Q: What forms of payment can I use in Jotrin?
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- Q: How is the shipping arranged and track my package?
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Customers can choose industry-leading freight companies, including DHL, FedEx, UPS, TNT, and Registered Mail.
Once your order has been processed for shipment, our sales will send you an e-mail advising you of the shipping status and tracking number.
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 UC2843B?
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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 UC2843B we delivered, we will accept the replacement or return of the UC2843B 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 UC2843B.
(3)The UC2843B 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. - Q: How to contact us and get support, such as UC2843B datasheet pdf, UC2843B pin diagram?
- Need any After-Sales service, please feel free contact us: sales@jotrin.com
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