Part Details for UC3842D8 by Unitrode Corporation
Results Overview of UC3842D8 by Unitrode Corporation
- Distributor Offerings: (6 listings)
- Number of FFF Equivalents: (8 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
UC3842D8 Information
UC3842D8 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 UC3842D8
| Part # | Distributor | Description | Stock | Price | Buy | |
|---|---|---|---|---|---|---|
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DISTI #
2156-UC3842D8-ND
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DigiKey | UC3842 CURRENT-MODE PWM CONTROLL Min Qty: 363 Lead time: 1 Weeks Container: Bulk MARKETPLACE PRODUCT |
2090 In Stock |
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$0.8300 | Buy Now |
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DISTI #
87245589
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Verical | UC3842D8 Min Qty: 377 Package Multiple: 1 Date Code: 0101 | Americas - 1666 |
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$0.6169 / $0.9950 | Buy Now |
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DISTI #
88046326
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Verical | UC3842D8 Min Qty: 377 Package Multiple: 1 | Americas - 424 |
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$0.6169 / $0.9950 | Buy Now |
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Quest Components | IC,SMPS CONTROLLER,CURRENT-MODE,BIPOLAR,SOP,8PIN,PLASTIC | 26 |
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$0.7866 / $1.3110 | Buy Now |
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Rochester Electronics | UC3842 Current-Mode PWM Controller RoHS: Compliant Status: Active Min Qty: 1 | 2090 |
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$0.4935 / $0.7960 | Buy Now |
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Vyrian | Other Function Semiconductors | 1309 |
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RFQ |
Part Details for UC3842D8
UC3842D8 CAD Models
UC3842D8 Part Data Attributes
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UC3842D8
Unitrode Corporation
Buy Now
Datasheet
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Compare Parts:
UC3842D8
Unitrode Corporation
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8,
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| Rohs Code | No | |
| Part Life Cycle Code | Transferred | |
| Ihs Manufacturer | UNITRODE CORP | |
| Reach Compliance Code | unknown | |
| 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 UC3842D8
This table gives cross-reference parts and alternative options found for UC3842D8. 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 UC3842D8, 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, | UC3842D8 vs UC2842D8 |
| UC2842AD8 | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, SOIC-8 | UC3842D8 vs UC2842AD8 |
| UC2842AD8TR | Unitrode Corporation | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, SOIC-8 | UC3842D8 vs UC2842AD8TR |
| UC3842AD8TR | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, SOIC-8 | UC3842D8 vs UC3842AD8TR |
| UC2842D8 | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, | UC3842D8 vs UC2842D8 |
| UC2842AD8TR | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, SOIC-8 | UC3842D8 vs UC2842AD8TR |
| UC3842D8 | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, | UC3842D8 vs UC3842D8 |
| UC3842AD8 | Unitrode Corp (RETIRED) | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8, SOIC-8 | UC3842D8 vs UC3842AD8 |
UC3842D8 Frequently Asked Questions (FAQ)
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The maximum voltage rating of the UC3842D8 is 30V, but it's recommended to operate it at a maximum voltage of 25V to ensure reliable operation and to prevent damage from voltage spikes.
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The oscillator circuit resistor values (Rt and Ct) depend on the desired switching frequency. A good starting point is to use the values recommended in the datasheet (Rt = 10kΩ, Ct = 3.3nF for 250kHz). Then, adjust the values based on the specific application requirements and the desired frequency.
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The soft-start pin (SS) is used to slowly ramp up the output voltage during startup, reducing inrush current and electromagnetic interference (EMI). Connect a capacitor (typically 10nF to 100nF) from the SS pin to ground, and the IC will slowly charge the capacitor during startup, controlling the output voltage rise time.
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To ensure stable operation, make sure to decouple the power supply pins (VCC and GND) with a 10uF to 22uF capacitor, and use a low-ESR capacitor (e.g., ceramic or film capacitor) for the output filter. Also, keep the layout clean and minimize parasitic inductances and capacitances.
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The maximum current rating of the UC3842D8 output stage is 1.5A peak, but the average current rating depends on the specific application and the thermal design. Make sure to check the thermal dissipation and the current rating of the external components (e.g., MOSFET, diode) to ensure reliable operation.