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ST UC3843BD
Boost, Flyback Regulator Positive, Isolation Capable Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 14-SOIC
Brands: STMicroelectronics, Inc
Mfr.Part #: UC3843BD
Datasheet: UC3843BD Datasheet (PDF)
Package/Case: SOP-14
Product Type: Power Management ICs
UC3843BD General Description
Boost, Flyback Regulator Positive, Isolation Capable Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 14-SOIC
Features
- Operating voltage range: 8V to 30V
- Low start-up current: 0.2mA
- Adjustable frequency range: 50kHz to 500kHz
- High output current: up to 1A
- Error amplifier with a 1.5V reference voltage
- Soft-start function to prevent high inrush current
Application
- Switch-mode power supplies
- DC-DC converters
- Battery chargers
- LED drivers
- Inverters
- Motor control circuits
Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Case/Package | SOIC | Number of Pins | 14 |
| Duty Cycle | 96 % | Fall Time | 50 ns |
| Frequency | 60 kHz | Max Duty Cycle | 96 % |
| Max Frequency | 275 kHz | Max Operating Temperature | 70 °C |
| Min Operating Temperature | 0 °C | Number of Outputs | 1 |
| Operating Supply Voltage | 30 V | Output Current | 1 A |
| Output Voltage | 5.1 V | Quiescent Current | 12 mA |
| Rise Time | 50 ns | Switching Frequency | 500 kHz |
| Topology | Boost, Flyback |
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 | |
|---|---|---|
 |
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.
Equivalent Parts
For the UC3843BD component, you may consider these replacement and alternative parts:
Part Number
Brands
Package
Description
Part Number : SG3843M
Brands :
Package :
Description :
Part Number : KA3843B
Brands :
Package :
Description :
Part Number : TL3843P
Brands :
Package :
Description :
Part Number : MC3843BD
Brands :
Package :
Description :
Part Number : IR3843MTRPBF
Brands :
Package :
Description :
Part Number : FAN3843MX
Brands :
Package :
Description :
Part Number : MAX3843AUP+T
Brands :
Package :
Description :
Part Number : NCP3843ADR2G
Brands :
Package :
Description :
Part points
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The UC3843BD chip is a pulse-width modulation controller used in power supply circuits to regulate output voltage. It features adjustable frequency and duty cycle, overcurrent protection, and soft-start capabilities. This chip is commonly used in switch mode power supplies due to its high performance and reliability.
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Equivalent
The equivalent products of UC3843BD chip are UC3843A, UC3843B, UC3843BD1, UC3843BDG, UC3843BDG1, UC3843BH, UC3843BHMQMLVQ, UC3843BN, UC3843BN-M, UC3843BNR2, UC3843D, UC3843DD, UC3843DG, UC3843DTR, UC3843DV, UC3843N. -
Features
1. Current-mode PWM control 2. Frequency adjustable up to 500kHz 3. Under-voltage lockout and soft-start functions 4. Over-current protection 5. Precision reference 6. Error amplifier with 2V reference and adjustable gain 7. UVLO with hysteresis 8. Operating voltage range from 7V to 30V -
Pinout
The UC3843BD is a voltage mode PWM controller with a pin count of 8. Pin functions are as follows: 1. Vref 2. Output 3. Current sense 4. Inverting input 5. CS compensation 6. Non-inverting input 7. Ground 8. Vin -
Manufacturer
The UC3843BD is manufactured by Texas Instruments, a semiconductor company specializing in digital signal processors, microcontrollers, and integrated circuits for a wide range of applications. -
Application Field
The UC3843BD is commonly used in switch-mode power supply applications, particularly in offline and DC-to-DC converters. It is also utilized in battery chargers, LED lighting drivers, and other power management systems where high efficiency and reliability are essential. -
Package
The UC3843BD chip is available in a DIP-8 package type, which is a dual in-line package with 8 pins. It is in a through-hole form, meaning the pins are inserted into holes in the circuit board for soldering. The size of the chip is typically around 6.35mm x 5.08mm.
Datasheet PDF
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