UC1843AJ883B Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The UC1843AJ883B is a current-mode PWM controller IC operating at up to 500 kHz with 8.2 V to 25 V input voltage range and 1 A output in an 8-pin ceramic DIP package. It supports pulse width modulation control for high-efficiency switching power supplies. Available from Texas Instruments with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- UC1843AJ883B Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Current-mode PWM control with up to 500 kHz switching frequency enables compact, high-efficiency power supply designs with fast transient response
- Wide input voltage range of 8.2 V to 25 V (nominal 15 V) with 1 A output current supports diverse power supply topologies including flyback, forward, and boost converters
- Military-grade 8-pin ceramic DIP package (R-GDIP-T8) with MIL-STD-883B qualification ensures high reliability in harsh environments and extended temperature ranges
Applications
The UC1843AJ883B is designed for use in off-line and DC-to-DC switching power supply controllers requiring precise current-mode PWM regulation. It is commonly applied in flyback, forward, and boost converter topologies for telecom power systems, industrial power supplies, and military electronics. Its ceramic package and MIL-STD-883B qualification make it ideal for mission-critical applications in aerospace and defense.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 25V |
| Input Voltage-Min | 8.2V |
| Input Voltage-Nom | 15V |
| JESD-30 Code | R-GDIP-T8 |
| JESD-609 Code | e0 |
| 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 | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP8,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Screening Level | MIL-STD-883 Class B |
| Supply Current-Max (Isup) | 25mA |
| Supply Voltage-Max (Vsup) | 25V |
| Supply Voltage-Min (Vsup) | 12V |
| Supply Voltage-Nom (Vsup) | 11V |
| Surface Mount | NO |
| Switcher Configuration | BUCK-BOOST |
| Switching Frequency-Max | 500kHz |
| Technology | BIPOLAR |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UC1843AJ883B:
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BICMOS, CDIP8
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP8
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP8
Frequently Asked Questions
What is the maximum switching frequency of the UC1843AJ883B?
The UC1843AJ883B supports switching frequencies up to 500 kHz, enabling compact transformer and filter designs in high-efficiency power supplies. Its current-mode PWM control technique provides inherent cycle-by-cycle current limiting and improved line and load transient response at these frequencies.
What input voltage range does the UC1843AJ883B support?
The UC1843AJ883B operates with an input voltage range of 8.2 V minimum to 25 V maximum, with a nominal operating voltage of 15 V. This wide range makes it suitable for a variety of power supply designs, including telecom, industrial, and military applications with varying input bus voltages.
What package does the UC1843AJ883B use and what certifications does it carry?
The UC1843AJ883B is housed in an 8-pin ceramic DIP package (R-GDIP-T8, JESD-30 code). The 'J883B' suffix indicates qualification to MIL-STD-883B, the US military standard for microelectronic devices, making it suitable for high-reliability aerospace, defense, and space applications requiring rigorous environmental and electrical testing.
What control technique does the UC1843AJ883B use compared to voltage-mode PWM controllers?
The UC1843AJ883B uses current-mode control, where the peak inductor current is sensed and used to terminate each PWM cycle, rather than relying solely on output voltage feedback as in voltage-mode control. This provides inherent cycle-by-cycle current limiting, improved line rejection, easier compensation, and simpler transformer volt-second balancing in push-pull and full-bridge topologies.
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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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