UC2843N Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
Texas Instruments UC2843N is a current-mode PWM controller IC with 500 kHz switching frequency, 1 A output drive, and 8-28 V input range. Designed for high-performance switch-mode power supplies. From $0.97, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- NOT RECOMMENDED
- Datasheet
- UC2843N Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.9700(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Current-mode PWM control for precise cycle-by-cycle current limiting and improved transient response
- Up to 500 kHz switching frequency enabling compact magnetics and high power density designs
- Wide input voltage range of 8.2 V to 28 V with 1 A peak output gate drive current
- Built-in under-voltage lockout (UVLO) and soft-start for reliable power-up sequencing
- Available in industry-standard 8-Pin PDIP package for easy through-hole assembly
Applications
The UC2843N is widely used in offline and DC-DC flyback, forward, and boost converter designs for industrial power supplies, telecom equipment, and consumer electronics. Its current-mode control architecture makes it ideal for battery chargers, motor drive auxiliary supplies, and distributed power architectures where tight regulation and fast transient response are critical.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 28V |
| Input Voltage-Min | 8.2V |
| Input Voltage-Nom | 15V |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 1A |
| Output Voltage-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 25mA |
| Supply Voltage-Max (Vsup) | 28V |
| Supply Voltage-Min (Vsup) | 8.4V |
| Surface Mount | NO |
| Switcher Configuration | BUCK-BOOST |
| Switching Frequency-Max | 500kHz |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Mexico |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UC2843N:
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BICMOS, PDIP8
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BICMOS, PDIP8
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BICMOS, PDIP8
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BICMOS, PDIP8
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP8
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP8
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP8
Frequently Asked Questions
What is the maximum switching frequency of the UC2843N?
The UC2843N supports switching frequencies up to 500 kHz. This high frequency capability allows designers to use smaller transformers and inductors, reducing the overall size and cost of the power supply. The oscillator frequency is set by an external resistor and capacitor connected to the RT/CT pins.
What input voltage range does the UC2843N support?
The UC2843N operates with an input voltage range of 8.2 V to 28 V, with a nominal operating voltage of 15 V. It features an under-voltage lockout (UVLO) that keeps the device off until the supply reaches the startup threshold, protecting the power supply during low-voltage conditions.
What are typical applications for the UC2843N?
The UC2843N is commonly used in offline switch-mode power supplies, DC-DC converters (flyback, forward, boost topologies), battery chargers, and industrial power supplies. Its current-mode control technique is especially suitable for applications requiring fast transient response and inherent cycle-by-cycle current limiting.
Is the UC2843N RoHS compliant and what package does it come in?
Yes, the UC2843N is Pb-free (RoHS compliant, JESD-609 code e4). It is housed in an 8-Pin PDIP (Dual In-Line Package) package, which is ideal for through-hole PCB assembly. The PDIP package provides easy hand-soldering and is widely supported by standard IC sockets.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.6235 | $1.62 |
| 18+ | $1.2988 | $23.38 |
| 50+ | $1.0700 | $53.50 |
| 59+ | $0.9741 | $57.47 |
| 500+ | $0.9700 | $485.00 |
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