UC1842AJ883B Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The UC1842AJ883B is a military-grade current-mode PWM controller from Texas Instruments operating at up to 500 kHz with a 5 V reference, 1 A gate drive output, and 11–25 V input voltage range in a ceramic 8-pin DIP package meeting MIL-STD-883 screening. It integrates an oscillator, precision 5 V reference, cycle-by-cycle current limit, and undervoltage lockout for dependable off-line and DC-DC power conversion. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- UC1842AJ883B 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
- MIL-STD-883B screened ceramic DIP-8 package ensuring qualification-grade reliability for military and aerospace switching power supply designs
- Current-mode PWM control at up to 500 kHz with cycle-by-cycle current limiting for fast fault response and simplified compensation
- Integrated precision 5 V reference and 1 A totem-pole gate drive output enabling direct MOSFET/IGBT drive without external buffers
Applications
The UC1842AJ883B is used in military and aerospace off-line power supplies, DC-DC converters, and point-of-load regulators where MIL-STD-883 qualification and ceramic packaging are required. Its current-mode architecture supports flyback, forward, and boost topologies operating from 11 V to 25 V input bus voltages. The 500 kHz maximum switching frequency allows compact magnetics and filter designs in weight-sensitive avionics and defense electronics.
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 | 11V |
| 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 UC1842AJ883B:
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP8
Frequently Asked Questions
What is the MIL-STD-883B screening on the UC1842AJ883B?
The '883B' suffix indicates that the UC1842AJ883B has been tested and screened to MIL-STD-883 Class B requirements, covering electrical performance over the full military temperature range (-55 to 125°C) along with mechanical and environmental stress tests required for military and aerospace procurement.
What is the maximum switching frequency of the UC1842AJ883B?
The UC1842AJ883B supports switching frequencies up to 500 kHz, which is set by an external resistor and capacitor on the oscillator pin. Higher switching frequencies allow the use of smaller transformer and filter components, reducing the size and weight of the overall power supply.
What control topology does the UC1842AJ883B implement?
The device implements current-mode pulse width modulation (PWM), where the switch current waveform is directly compared to a control voltage each cycle. This provides inherent cycle-by-cycle overcurrent protection, improved line regulation, and simplified feedback loop design compared to voltage-mode controllers.
What is the gate drive output current capability of the UC1842AJ883B?
The UC1842AJ883B provides a 1 A peak totem-pole gate drive output capable of directly driving the gate of a power MOSFET or IGBT without an external buffer. This simplifies the overall circuit and reduces component count in the gate drive stage.
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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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