Part Details for UC3843AN by Texas Instruments
Results Overview of UC3843AN by Texas Instruments
- Distributor Offerings: (4 listings)
- Number of FFF Equivalents: (0 replacements)
- Tariff Estimator: (Available) NEW
- Number of Functional Equivalents: (10 options)
- CAD Models: (Available)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.
Applications
Consumer Electronics
Energy and Power Systems
Renewable Energy
UC3843AN Information
UC3843AN by Texas Instruments is a Switching Regulator or Controller.
Switching Regulator or Controllers are under the broader part category of Power Circuits.
A power circuit delivers electricity in order to operate a load for an electronic device. Power circuits include transformers, generators and switches. Read more about Power Circuits on our Power Circuits part category page.
Price & Stock for UC3843AN
| Part # | Distributor | Description | Stock | Price | Buy | |
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DISTI #
3008564
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element14 Asia-Pacific | IC, CURRENT MODE PWM CTRL, 30V, PDIP-8 COO: MY RoHS: Compliant Min Qty: 1 Container: Each | 16 |
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$0.8000 / $1.6200 | Buy Now |
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Rochester Electronics | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP8 RoHS: Compliant Status: Active Min Qty: 1 | 9283 |
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$0.5768 / $0.9303 | Buy Now |
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DISTI #
UC3843AN
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TME | IC: PMIC, PWM controller, 1A, 47÷500kHz, Ch: 1, DIP8, 8.4÷30V, 0÷96% Min Qty: 1 | 215 |
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$0.7800 / $1.4200 | Buy Now |
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New Advantage Corporation | IC REG CTRLR MULT TOPOLOGY 8DIP RoHS: Compliant Min Qty: 1 Package Multiple: 100 | 675 |
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$1.4200 / $1.5400 | Buy Now |
US Tariff Estimator: UC3843AN by Texas Instruments
Calculations from this tool are estimations only for imports into the United States. Please refer to the distributor or manufacturer and reference official US government sources and authorities to verify any final purchase costs.
Part Details for UC3843AN
UC3843AN CAD Models
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UC3843AN Part Data Attributes
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UC3843AN
Texas Instruments
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Datasheet
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UC3843AN
Texas Instruments
30-V, 1A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle 0°C to 70°C 8-PDIP 0 to 70
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| Pbfree Code | Yes | |
| Rohs Code | Yes | |
| Part Life Cycle Code | Active | |
| Part Package Code | DIP | |
| Package Description | Dip, Dip8,.3 | |
| Pin Count | 8 | |
| Reach Compliance Code | Compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.60 | |
| Analog IC - Other Type | Switching Controller | |
| Control Mode | Current-Mode | |
| Control Technique | Pulse Width Modulation | |
| Input Voltage-Max | 28 V | |
| Input Voltage-Min | 8.2 V | |
| Input Voltage-Nom | 15 V | |
| JESD-30 Code | R-PDIP-T8 | |
| JESD-609 Code | e4 | |
| Length | 9.81 Mm | |
| Number of Functions | 1 | |
| Number of Terminals | 8 | |
| Operating Temperature-Max | 70 °C | |
| Operating Temperature-Min | ||
| Output Current-Max | 1 A | |
| Output Voltage-Max | 5.1 V | |
| Output Voltage-Min | 4.9 V | |
| Output Voltage-Nom | 5 V | |
| Package Body Material | Plastic/Epoxy | |
| Package Code | DIP | |
| Package Equivalence Code | DIP8,.3 | |
| Package Shape | Rectangular | |
| Package Style | In-Line | |
| Qualification Status | Not Qualified | |
| Seated Height-Max | 5.08 Mm | |
| Supply Current-Max (Isup) | 25 Ma | |
| Supply Voltage-Max (Vsup) | 28 V | |
| Supply Voltage-Min (Vsup) | 8.4 V | |
| Supply Voltage-Nom (Vsup) | 11 V | |
| Surface Mount | No | |
| Switcher Configuration | Buck-Boost | |
| Switching Frequency-Max | 500 Khz | |
| Technology | Bipolar | |
| Temperature Grade | Commercial | |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) | |
| Terminal Form | Through-Hole | |
| Terminal Pitch | 2.54 Mm | |
| Terminal Position | Dual | |
| Width | 7.62 Mm |
Alternate Parts for UC3843AN
This table gives cross-reference parts and alternative options found for UC3843AN. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of UC3843AN, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| UC3843BN | STMicroelectronics | $0.4450 | Current Mode PWM | UC3843AN vs UC3843BN |
| UC3844D8TR | Texas Instruments | $0.4994 | Single ended 500KHz current mode PWM controller with 16V/10V UVLO 50% duty cycle, 0C to 70C 8-SOIC 0 to 70 | UC3843AN vs UC3844D8TR |
| UC2846DW | Texas Instruments | $2.4272 | Dual ended 500KHz current mode PWM controller, -40C to 85C 16-SOIC -40 to 85 | UC3843AN vs UC2846DW |
| SG1844L | Microchip Technology Inc | Check for Price | Current Mode PWMs Isolated Switching Regulators Off-line, 16V UVLO-55C to125C | UC3843AN vs SG1844L |
| UC2845J | Texas Instruments | Check for Price | Current-Mode PWM Controller 8-CDIP -40 to 85 | UC3843AN vs UC2845J |
| UC3842BVDR2 | onsemi | Check for Price | 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO14, PLASTIC, SOIC-14 | UC3843AN vs UC3842BVDR2 |
| LT1242IS8 | Analog Devices Inc | Check for Price | Switching Controller, Current-mode, 500kHz Switching Freq-Max, PDSO8 | UC3843AN vs LT1242IS8 |
| UC2842D | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14, | UC3843AN vs UC2842D |
| UC2843AD8TRG4 | Texas Instruments | Check for Price | 30-V, 1-A, 500KHz current mode PWM controller with 8.4V/7.6V UVLO 100% duty cycle 40°C to 85°C 8-SOIC -40 to 85 | UC3843AN vs UC2843AD8TRG4 |
| UC3842D8TRG4 | Texas Instruments | Check for Price | 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-8 | UC3843AN vs UC3842D8TRG4 |
UC3843AN Frequently Asked Questions (FAQ)
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The recommended operating voltage range for UC3843AN is 12V to 28V, with a maximum rating of 30V.
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The resistor values for the oscillator circuit (Rt and Ct) can be calculated using the formulae provided in the datasheet. A general guideline is to choose Rt between 1kΩ to 10kΩ and Ct between 100pF to 1000pF.
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The soft-start pin (SS) is used to gradually increase the output voltage during startup, reducing inrush currents and electromagnetic interference (EMI). Connect a capacitor (typically 10nF to 100nF) from SS to GND to implement soft-start.
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The voltage drop across Rs can be compensated by adding a voltage offset to the current limit threshold. The offset voltage can be calculated using the formula: Voffset = Rs * Imax, where Imax is the maximum current limit.
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The maximum switching frequency of UC3843AN is approximately 500kHz, but it can be limited by the external component values and the application requirements.