Part Details for UC3845D by onsemi
Results Overview of UC3845D by onsemi
- Distributor Offerings: (3 listings)
- Number of FFF Equivalents: (5 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
UC3845D Information
UC3845D by onsemi 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 UC3845D
| Part # | Distributor | Description | Stock | Price | Buy | |
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Bristol Electronics | 189 |
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RFQ | ||
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Quest Components | 1 A SWITCHING CONTROLLER, 500 KHZ SWITCHING FREQ-MAX, PDSO14 | 151 |
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$0.6750 / $1.3500 | Buy Now |
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Rochester Electronics | UC3845 - Current Mode PWM Controller RoHS: Compliant Status: Active Min Qty: 1 | 270 |
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$0.4935 / $0.7960 | Buy Now |
Part Details for UC3845D
UC3845D CAD Models
UC3845D Part Data Attributes
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UC3845D
onsemi
Buy Now
Datasheet
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Compare Parts:
UC3845D
onsemi
1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO14, PLASTIC, SOIC-14
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| Rohs Code | No | |
| Part Life Cycle Code | Obsolete | |
| Ihs Manufacturer | ONSEMI | |
| Part Package Code | SOIC | |
| Package Description | SOIC-14 | |
| Pin Count | 14 | |
| Reach Compliance Code | not_compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.01 | |
| Samacsys Manufacturer | onsemi | |
| Analog IC - Other Type | SWITCHING CONTROLLER | |
| Control Mode | CURRENT-MODE | |
| Control Technique | PULSE WIDTH MODULATION | |
| Input Voltage-Max | 25 V | |
| Input Voltage-Min | 8.2 V | |
| Input Voltage-Nom | 15 V | |
| JESD-30 Code | R-PDSO-G14 | |
| JESD-609 Code | e0 | |
| Length | 8.65 mm | |
| Moisture Sensitivity Level | 1 | |
| 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 | SOP | |
| Package Equivalence Code | SOP14,.25 | |
| Package Shape | RECTANGULAR | |
| Package Style | SMALL OUTLINE | |
| Peak Reflow Temperature (Cel) | 235 | |
| Qualification Status | Not Qualified | |
| Seated Height-Max | 1.75 mm | |
| Surface Mount | YES | |
| Switcher Configuration | SINGLE | |
| Switching Frequency-Max | 500 kHz | |
| Technology | BIPOLAR | |
| Temperature Grade | COMMERCIAL | |
| Terminal Finish | TIN LEAD | |
| Terminal Form | GULL WING | |
| Terminal Pitch | 1.27 mm | |
| Terminal Position | DUAL | |
| Width | 3.9 mm |
Alternate Parts for UC3845D
This table gives cross-reference parts and alternative options found for UC3845D. 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 UC3845D, 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 |
|---|---|---|---|---|
| UC2845DR2G | onsemi | Check for Price | 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO14, LEAD FREE, PLASTIC, SOIC-14 | UC3845D vs UC2845DR2G |
| SG3845D-TR | Microchip Technology Inc | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14 | UC3845D vs SG3845D-TR |
| SG3845D | Microsemi Corporation | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14, ROHS COMPLIANT, PLASTIC, SOIC-14 | UC3845D vs SG3845D |
| UC3845DR2 | onsemi | Check for Price | 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO14, PLASTIC, SOIC-14 | UC3845D vs UC3845DR2 |
| UC3845DR2G | onsemi | Check for Price | 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO14, LEAD FREE, PLASTIC, SOIC-14 | UC3845D vs UC3845DR2G |
UC3845D Frequently Asked Questions (FAQ)
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The UC3845D has a maximum voltage rating of 30V, but it's recommended to operate it within 15V to ensure reliable operation.
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The minimum input voltage required for the UC3845D is typically 8.5V, but it depends on the output voltage and current requirements. A general rule of thumb is to add 2-3V to the maximum output voltage to ensure proper operation.
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The bootstrap capacitor (CBOOT) is used to provide a high-voltage supply to the gate driver of the power MOSFET. It's essential for proper operation of the IC and ensures that the power MOSFET is fully turned on.
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The value of the current sense resistor (RSENSE) depends on the maximum output current and the desired current limit. A general rule of thumb is to choose a value that provides a voltage drop of 0.5-1V at the maximum output current.
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The maximum switching frequency of the UC3845D is 1MHz, but it's recommended to operate it at a frequency below 500kHz to ensure reliable operation and minimize EMI.