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
What are the key features of UC2843N?
- 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
What is UC2843N used for?
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.
What are the specifications of UC2843N?
| 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 |
Where can I find the UC2843N datasheet?
UC2843N Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for UC2843N?
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.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
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.
More from Texas Instruments
| 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 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit