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ON UC3843BDR2G
Boost, Flyback Regulator Positive, Isolation Capable Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 14-SOIC
Brands: ON Semiconductor, LLC
Mfr.Part #: UC3843BDR2G
Datasheet: UC3843BDR2G Datasheet (PDF)
Package/Case: SOIC-14
Product Type: Power Management ICs
UC3843BDR2G General Description
The UC3842B, UC3843B series are high performance fixed frequency current mode controllers. They are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components. These integrated circuits feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.
Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, programmable output deadtime, and a latch for single pulse metering.
These devices are available in an 8-pin dual-in-line and surface mount (SO-8) plastic package as well as the 14-pin plastic surface mount (SO-14). The SO-14 package has separate power and ground pins for the totem pole output stage.
The UCX842B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off-line converters. The UCX843B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).
Features
- Trimmed Oscillator for Precise Frequency Control
- Oscillator Frequency Guaranteed at 250 kHz
- Current Mode Operation to 500 kHz
- Automatic Feed Forward Compensation
- Latching PWM for Cycle-By-Cycle Current Limiting
- Internally Trimmed Reference with Undervoltage Lockout
- High Current Totem Pole Output
- Undervoltage Lockout with Hysteresis
- Low Startup and Operating Current
- Pb-Free Packages are Available
Application
ONSEMI
Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Manufacturer: | ON Semiconductor | Product Category: | Switching Controllers |
| RoHS: | Y | Topology: | Boost, Flyback, Forward |
| Number of Outputs: | 1 Output | Switching Frequency: | 500 kHz |
| Duty Cycle - Max: | 96 % | Output Voltage: | 4.9 V to 5.1 V |
| Output Current: | 1 A | Minimum Operating Temperature: | 0 C |
| Maximum Operating Temperature: | + 70 C | Mounting Style: | SMD/SMT |
| Package / Case: | SOIC-14 | Packaging: | Reel |
| Series: | UC3843B | Type: | Current Mode PWM Controllers |
| Brand: | ON Semiconductor | Fall Time: | 50 ns |
| Operating Supply Voltage: | 30 V | Product Type: | Switching Controllers |
| Rise Time: | 50 ns | Factory Pack Quantity: | 2500 |
| Subcategory: | PMIC - Power Management ICs | Unit Weight: | 0.011923 oz |
| Tags | UC3843BDR2, UC3843BDR, UC3843BD, UC3843B, UC3843, UC384, UC38, UC3 |
Shipping
| Shipping Type | Ship Fee | Lead Time | |
|---|---|---|---|
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DHL | $20.00-$40.00 (0.50 KG) | 2-5 days |
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Fedex | $20.00-$40.00 (0.50 KG) | 2-5 days |
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UPS | $20.00-$40.00 (0.50 KG) | 2-5 days |
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TNT | $20.00-$40.00 (0.50 KG) | 2-5 days |
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EMS | $20.00-$40.00 (0.50 KG) | 2-5 days |
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REGISTERED AIR MAIL | $20.00-$40.00 (0.50 KG) | 2-5 days |
Processing Time：Shipping fee depend on different zone and country.
Payment
| Terms of payment | Hand Fee | |
|---|---|---|
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Wire Transfer | charge US$30.00 banking fee. |
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Paypal | charge 4.0% service fee. |
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Credit Card | charge 3.5% service fee. |
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Western Union | charge US.00 banking fee. |
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Money Gram | charge US$0.00 banking fee. |
Guarantees
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.
Packing
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Step1 :Product
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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.
Part points
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The UC3843BDR2G chip is a voltage mode PWM controller used in power supply applications. It operates at a fixed frequency of 500 kHz and has built-in features like an error amplifier, current sense comparator, oscillator, and soft-start. This chip is commonly used in dc-dc converters, uninterruptible power supplies (UPS), battery chargers, and LED drivers.
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Equivalent
Some equivalent products of the UC3843BDR2G chip include the UC3843BD1R2G, UC3843BNG, and UC3843BD1013TR. -
Features
The UC3843BDR2G is a high-performance voltage mode controller that offers features like a 1A totem pole output driver, 1% output voltage tolerance, oscillator frequency up to 500kHz, and a low start-up and operating current. It also has built-in soft-start functionality, an error amplifier with very low input bias current, and a maximum duty cycle of 50%. -
Pinout
The UC3843BDR2G is a 8-pin integrated circuit (IC) that serves as a PWM controller. Its pin count and function are as follows: 1. Error Amplifier Output 2. Compensation 3. Voltage Feedback Input 4. Ground 5. Current Sense Input 6. Over-temperature Protection 7. Output 8. Voltage Reference and Oscillator -
Manufacturer
The manufacturer of the UC3843BDR2G is ON Semiconductor. It is a global semiconductor company, specializing in power management, automotive, and IoT solutions. -
Application Field
The UC3843BDR2G is a high-performance fixed-frequency current-mode controller integrated circuit. It is commonly used in applications such as AC-DC power supplies, active power factor correction, and DC-DC converters. -
Package
The UC3843BDR2G chip comes in a SOIC (Small Outline Integrated Circuit) package. Its form is Dual-In-Line (DIL) style, which means it has two parallel rows of pins. The size of the chip is typically 4.9mm x 3.91mm.
Datasheet PDF
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