Part Details for UC3845B by STMicroelectronics
Results Overview of UC3845B by STMicroelectronics
- Distributor Offerings: (2 listings)
- Number of FFF Equivalents: (0 replacements)
- CAD Models: (Request Part)
- Number of Functional Equivalents: (10 options)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.
Applications
Consumer Electronics
Energy and Power Systems
Renewable Energy
UC3845B Information
UC3845B by STMicroelectronics is a Switching Regulator or Controller.
Switching Regulator or Controllers are under the broader part category of Power Circuits.
A power circuit delivers electricity in order to operate a load for an electronic device. Power circuits include transformers, generators and switches. Read more about Power Circuits on our Power Circuits part category page.
Price & Stock for UC3845B
| Part # | Distributor | Description | Stock | Price | Buy | |
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Bristol Electronics | 13 |
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ComSIT USA | CURRENT MODE PWM CONTROLLER Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP14 ECCN: EAR99 RoHS: Compliant |
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RFQ |
Part Details for UC3845B
UC3845B CAD Models
UC3845B Part Data Attributes
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UC3845B
STMicroelectronics
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Datasheet
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UC3845B
STMicroelectronics
1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDIP14, PLASTIC, DIP-14
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| Pbfree Code | Yes | |
| Rohs Code | Yes | |
| Part Life Cycle Code | Active | |
| Ihs Manufacturer | STMICROELECTRONICS | |
| Part Package Code | DIP | |
| Package Description | PLASTIC, DIP-14 | |
| Pin Count | 14 | |
| Reach Compliance Code | compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.01 | |
| Analog IC - Other Type | SWITCHING CONTROLLER | |
| Control Mode | CURRENT-MODE | |
| Control Technique | PULSE WIDTH MODULATION | |
| Input Voltage-Max | 25 V | |
| Input Voltage-Min | 12 V | |
| Input Voltage-Nom | 15 V | |
| JESD-30 Code | R-PDIP-T14 | |
| Number of Functions | 1 | |
| Number of Terminals | 14 | |
| Operating Temperature-Max | 70 °C | |
| Operating Temperature-Min | ||
| Output Current-Max | 1 A | |
| Package Body Material | PLASTIC/EPOXY | |
| Package Code | DIP | |
| Package Equivalence Code | DIP14,.3 | |
| Package Shape | RECTANGULAR | |
| Package Style | IN-LINE | |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED | |
| Qualification Status | Not Qualified | |
| Seated Height-Max | 5.1 mm | |
| Surface Mount | NO | |
| Switcher Configuration | SINGLE | |
| Switching Frequency-Max | 500 kHz | |
| Technology | BIPOLAR | |
| Temperature Grade | COMMERCIAL | |
| Terminal Form | THROUGH-HOLE | |
| Terminal Pitch | 2.54 mm | |
| Terminal Position | DUAL | |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED | |
| Width | 7.62 mm |
Alternate Parts for UC3845B
This table gives cross-reference parts and alternative options found for UC3845B. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of UC3845B, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| SG1845J-883B | Microchip Technology Inc | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, CDIP14 | UC3845B vs SG1845J-883B |
| UC1845AJ/883BC | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP8, | UC3845B vs UC1845AJ/883BC |
| IP3843N | TT Electronics Resistors | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDIP8, PLASTIC, DIP-8 | UC3845B vs IP3843N |
| AS2842N | Emerson Embedded Power | Check for Price | 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDIP8, PLASTIC, DIP-8 | UC3845B vs AS2842N |
| UC1843AL/883BC | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CQCC20, | UC3845B vs UC1843AL/883BC |
| UC1844J/883BC | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP8, | UC3845B vs UC1844J/883BC |
| UC2840J | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP18, | UC3845B vs UC2840J |
| LT1243MJ8 | Linear Technology | Check for Price | IC 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, CDIP8, 0.300 INCH, HERMETIC SEALED, CERDIP-8, Switching Regulator or Controller | UC3845B vs LT1243MJ8 |
| AS3845N | Artesyn Embedded Technologies | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDIP8, PLASTIC, DIP-8 | UC3845B vs AS3845N |
| SG1843Y | Microchip Technology Inc | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CDIP8 | UC3845B vs SG1843Y |
UC3845B Frequently Asked Questions (FAQ)
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The recommended operating voltage range for UC3845B is 12V to 28V, with a maximum rating of 30V.
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The output voltage of the UC3845B can be calculated using the formula: Vout = Vref x (1 + R2/R1), where Vref is the internal reference voltage (5V), R1 and R2 are the feedback resistors.
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The maximum switching frequency of UC3845B is 500 kHz, but it can be adjusted using an external resistor and capacitor connected to the RT pin.
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To ensure stability and prevent oscillations, it's essential to follow proper PCB layout guidelines, use a sufficient decoupling capacitor, and add a compensation network (e.g., a pole-zero compensation network) to the feedback loop.
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Yes, the UC3845B can be used as a boost converter, but it requires additional components and a different configuration. The datasheet provides a typical application circuit for a boost converter.