UC2843AQD8RG4 Texas Instruments Integrated Circuit (Other) In Stock
The UC2843AQD8RG4 is a current-mode PWM controller IC from Texas Instruments, operating with an input voltage range of 12V to 25V nominal 15V and utilizing pulse-width modulation control for regulated power conversion. Housed in an 8-pin PDSO surface-mount package, it provides precise current-mode control for switch-mode power supply topologies. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- UC2843AQD8RG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Current-mode PWM control technique enabling inherent cycle-by-cycle peak current limiting
- Input voltage range from 12V to 25V supporting a wide range of power supply designs
- 8-pin PDSO surface-mount package for compact layout in space-constrained applications
- Single-function switching controller optimized for flyback and forward converter topologies
Applications
The UC2843AQD8RG4 is used as the primary controller in switch-mode power supplies including flyback converters, forward converters, and boost regulators where current-mode control offers superior transient response and automatic overcurrent protection. It is well suited for industrial power supplies, adapters, and embedded system power stages operating from 12V to 25V input rails. The current-mode architecture simplifies compensation network design and improves line and load regulation performance.
Specifications
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 25V |
| Input Voltage-Min | 12V |
| Input Voltage-Nom | 15V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 1A |
| Output Voltage-Max | 5.05V |
| Output Voltage-Min | 4.95V |
| Output Voltage-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 500kHz |
| Technology | BIPOLAR |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UC2843AQD8RG4:
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8
Frequently Asked Questions
What control mode does the UC2843AQD8RG4 use?
The UC2843AQD8RG4 uses current-mode PWM control, which senses the inductor or transformer primary current on a cycle-by-cycle basis, providing inherent peak current limiting, improved transient response, and simplified loop compensation compared to voltage-mode control.
What is the input voltage range of the UC2843AQD8RG4?
The UC2843AQD8RG4 operates with an input voltage minimum of 12V and maximum of 25V, with a nominal operating voltage of 15V, making it suitable for industrial 12V and 24V bus-powered power supply designs and offline converter secondary regulation.
What package does the UC2843AQD8RG4 use?
The UC2843AQD8RG4 is housed in an 8-pin PDSO (Small Outline) surface-mount package, which provides a compact footprint suitable for modern SMT PCB assembly processes and is compatible with standard 8-pin SOIC land patterns.
What are typical applications for the UC2843AQD8RG4?
Typical applications include flyback converters, forward converters, and buck regulators for industrial power supplies, telecommunications equipment, and consumer electronics where a single-channel current-mode PWM controller with 12V to 25V input range simplifies the power stage design.
Is the UC2843AQD8RG4 RoHS compliant?
Yes, the UC2843AQD8RG4 carries a JESD-609 code of e4, indicating it is a lead-free, RoHS-compliant device, making it suitable for environmentally regulated markets in Europe, Asia, and other regions requiring restriction of hazardous substances compliance.
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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.
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