Part Details for UC3842AD8 by Unitrode Corporation
Results Overview of UC3842AD8 by Unitrode Corporation
- Distributor Offerings: (4 listings)
- Number of FFF Equivalents: (9 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
UC3842AD8 Information
UC3842AD8 by Unitrode Corporation 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 UC3842AD8
| Part # | Distributor | Description | Stock | Price | Buy | |
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DISTI #
1101423
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Farnell | PWM CONTROLLER, SMD, 3842, SOIC8 RoHS: Compliant Min Qty: 1 Lead time: 53 Weeks, 1 Days Container: Each | 0 |
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$0.7705 | Buy Now |
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DISTI #
88049659
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Verical | UC3842AD8 Min Qty: 465 Package Multiple: 1 Date Code: 1301 | Americas - 500 |
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$0.5001 / $0.8066 | Buy Now |
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Bristol Electronics | 812 |
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RFQ | ||
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Rochester Electronics | UC3842A Current Mode PWM Controller RoHS: Compliant Status: Obsolete Min Qty: 1 | 500 |
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$0.4001 / $0.6453 | Buy Now |
Part Details for UC3842AD8
UC3842AD8 CAD Models
UC3842AD8 Part Data Attributes
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UC3842AD8
Unitrode Corporation
Buy Now
Datasheet
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Compare Parts:
UC3842AD8
Unitrode Corporation
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, SOIC-8
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| Rohs Code | No | |
| Part Life Cycle Code | Transferred | |
| Ihs Manufacturer | UNITRODE CORP | |
| Package Description | SOIC-8 | |
| Reach Compliance Code | unknown | |
| Samacsys Manufacturer | UNITRODE | |
| 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-PDSO-G8 | |
| JESD-609 Code | e0 | |
| Number of Functions | 1 | |
| Number of Terminals | 8 | |
| Operating Temperature-Max | 70 °C | |
| Operating Temperature-Min | ||
| Output Current-Max | 1 A | |
| Output Voltage-Nom | 2.5 V | |
| Package Body Material | PLASTIC/EPOXY | |
| Package Code | SOP | |
| Package Equivalence Code | SOP8,.25 | |
| Package Shape | RECTANGULAR | |
| Package Style | SMALL OUTLINE | |
| Qualification Status | Not Qualified | |
| Supply Current-Max (Isup) | 17 mA | |
| Surface Mount | YES | |
| Switcher Configuration | SINGLE | |
| Switching Frequency-Max | 500 kHz | |
| Technology | BIPOLAR | |
| Temperature Grade | COMMERCIAL | |
| Terminal Finish | Tin/Lead (Sn/Pb) | |
| Terminal Form | GULL WING | |
| Terminal Pitch | 1.27 mm | |
| Terminal Position | DUAL |
Alternate Parts for UC3842AD8
This table gives cross-reference parts and alternative options found for UC3842AD8. 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 UC3842AD8, 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 |
|---|---|---|---|---|
| UC2842D8 | Unitrode Corporation | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, | UC3842AD8 vs UC2842D8 |
| UC2842AD8 | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, SOIC-8 | UC3842AD8 vs UC2842AD8 |
| UC2842AD8TR | Unitrode Corporation | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, SOIC-8 | UC3842AD8 vs UC2842AD8TR |
| UC3842AD8TR | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, SOIC-8 | UC3842AD8 vs UC3842AD8TR |
| UC3842D8 | Unitrode Corporation | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, | UC3842AD8 vs UC3842D8 |
| UC2842D8 | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, | UC3842AD8 vs UC2842D8 |
| UC2842AD8TR | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, SOIC-8 | UC3842AD8 vs UC2842AD8TR |
| UC3842D8 | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, | UC3842AD8 vs UC3842D8 |
| UC3842AD8 | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, SOIC-8 | UC3842AD8 vs UC3842AD8 |
UC3842AD8 Frequently Asked Questions (FAQ)
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The maximum operating frequency of UC3842AD8 is 500 kHz, but it can be extended up to 1 MHz with proper design and layout considerations.
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To ensure stable operation, make sure to follow the recommended layout and PCB design guidelines, use a stable voltage supply, and decouple the IC properly. Also, ensure that the feedback loop is properly compensated and the output voltage is within the specified range.
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The soft-start pin (SS) is used to slowly ramp up the output voltage during startup, reducing inrush currents and preventing voltage overshoots. It can be connected to a capacitor to ground to set the soft-start time.
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Yes, UC3842AD8 can be used for isolated flyback converters, but it requires additional circuitry to provide isolation between the primary and secondary sides. This can be achieved using optocouplers or transformers.
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The minimum duty cycle is typically around 0.2% to 0.5%, while the maximum duty cycle is around 99.5% to 99.8%. The exact values depend on the specific application and design requirements. Consult the datasheet and application notes for more information.