Part Details for UC3842BD1 by STMicroelectronics
Results Overview of UC3842BD1 by STMicroelectronics
- Distributor Offerings: (23 listings)
- Number of FFF Equivalents: (8 replacements)
- Tariff Estimator: (Available) NEW
- Number of Functional Equivalents: (10 options)
- CAD Models: (Available)
- 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
UC3842BD1 Information
UC3842BD1 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 UC3842BD1
| Part # | Distributor | Description | Stock | Price | Buy | |
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DISTI #
45AC7921
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Newark | Pwm Controller, 500Khz, 15V, Soic-8, Power Supply Controller Type:Single Ended Controller, No. Of Channels:1Channels, Control Mode:Current Mode Control, Supply Voltage Min:11V, Supply Voltage Max:30V, Ic Case/Package:Soic, Msl:- Rohs Compliant: Yes |Stmicroelectronics UC3842BD1 RoHS: Compliant Min Qty: 1 Package Multiple: 1 Date Code: 0 Container: Bulk | 10 |
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$0.3320 | Buy Now |
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DISTI #
497-18660-ND
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DigiKey | IC REG CTRLR BST FLYBK ISO 8-SO Min Qty: 1 Lead time: 14 Weeks Container: Tube |
1998 In Stock |
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$0.4621 / $1.0000 | Buy Now |
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DISTI #
45AC7921
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Avnet Americas | Current Mode PWM Controller 1A 8-Pin SO N - Bulk (Alt: 45AC7921) COO: Singapore RoHS: Compliant Min Qty: 1 Package Multiple: 1 Container: Bulk | 10 Partner Stock |
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$0.5220 / $1.1200 | Buy Now |
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DISTI #
45AC7921
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Avnet Americas | Current Mode PWM Controller 1A 8-Pin SO N - Bulk (Alt: 45AC7921) COO: Singapore RoHS: Compliant Min Qty: 1 Package Multiple: 1 Container: Bulk | 10 Partner Stock |
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$0.5220 / $1.1200 | Buy Now |
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DISTI #
UC3842BD1
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Avnet Americas | Current Mode PWM Controller 1A 8-Pin SO N - Rail/Tube (Alt: UC3842BD1) COO: Singapore RoHS: Compliant Min Qty: 2000 Package Multiple: 2000 Lead time: 14 Weeks, 0 Days Container: Tube | 0 |
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$0.3983 / $0.4235 | Buy Now |
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DISTI #
UC3842BD1
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Avnet Americas | Current Mode PWM Controller 1A 8-Pin SO N - Rail/Tube (Alt: UC3842BD1) COO: Singapore RoHS: Compliant Min Qty: 2000 Package Multiple: 2000 Lead time: 14 Weeks, 0 Days Container: Tube | 0 |
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$0.3983 / $0.4235 | Buy Now |
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DISTI #
511-UC3842BD
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Mouser Electronics | Switching Controllers 0.5mA Current Mode RoHS: Compliant | 1692 |
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$0.4530 / $1.0200 | Buy Now |
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DISTI #
E02:0323_00205624
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Arrow Electronics | Current Mode PWM Controller 1A 500kHz 8-Pin SO N Tube COO: Morocco RoHS: Compliant Min Qty: 1 Package Multiple: 1 Lead time: 14 Weeks Date Code: 2505 | Europe - 574 |
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$0.3195 / $0.4872 | Buy Now |
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STMicroelectronics | Current Mode PWM COO: Singapore RoHS: Compliant Min Qty: 1 | 1692 |
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$0.6000 / $1.0000 | Buy Now |
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Future Electronics | RoHS: Compliant pbFree: Yes Min Qty: 2000 Package Multiple: 2000 Lead time: 14 Weeks | 0 |
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$0.4090 / $0.4260 | Buy Now |
US Tariff Estimator: UC3842BD1 by STMicroelectronics
Calculations from this tool are estimations only for imports into the United States. Please refer to the distributor or manufacturer and reference official US government sources and authorities to verify any final purchase costs.
Part Details for UC3842BD1
UC3842BD1 CAD Models
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UC3842BD1 Part Data Attributes
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UC3842BD1
STMicroelectronics
Buy Now
Datasheet
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UC3842BD1
STMicroelectronics
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8
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| Rohs Code | Yes | |
| Part Life Cycle Code | Active | |
| Part Package Code | SOIC | |
| Package Description | Sop, Sop8,.25 | |
| Pin Count | 8 | |
| Reach Compliance Code | Compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.01 | |
| Factory Lead Time | 14 Weeks | |
| Analog IC - Other Type | Switching Controller | |
| Control Mode | Current-Mode | |
| Control Technique | Pulse Width Modulation | |
| Input Voltage-Max | 30 V | |
| Input Voltage-Min | 11.5 V | |
| Input Voltage-Nom | 15 V | |
| JESD-30 Code | R-PDSO-G8 | |
| JESD-609 Code | e4 | |
| Length | 4.9 Mm | |
| Moisture Sensitivity Level | 1 | |
| Number of Functions | 1 | |
| Number of Terminals | 8 | |
| Operating Temperature-Max | 70 °C | |
| Operating Temperature-Min | ||
| Output Current-Max | 1 A | |
| Package Body Material | Plastic/Epoxy | |
| Package Code | SOP | |
| Package Equivalence Code | SOP8,.25 | |
| Package Shape | Rectangular | |
| Package Style | Small Outline | |
| Peak Reflow Temperature (Cel) | Not Specified | |
| 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 | Nickel/Palladium/Gold (Ni/Pd/Au) | |
| Terminal Form | Gull Wing | |
| Terminal Pitch | 1.27 Mm | |
| Terminal Position | Dual | |
| Time@Peak Reflow Temperature-Max (s) | Not Specified | |
| Width | 3.9 Mm |
Alternate Parts for UC3842BD1
This table gives cross-reference parts and alternative options found for UC3842BD1. 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 UC3842BD1, 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 |
|---|---|---|---|---|
| UC3842BD1G | onsemi | $0.4856 | High Performance Current Mode PWM Controller, SOIC-8 Narrow Body, 98-TUBE | UC3842BD1 vs UC3842BD1G |
| UC3842BD1R2 | Motorola Semiconductor Products | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8 | UC3842BD1 vs UC3842BD1R2 |
| UC3842BD1 | onsemi | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8 | UC3842BD1 vs UC3842BD1 |
| LT1242IS8#TRPBF | Analog Devices Inc | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8 | UC3842BD1 vs LT1242IS8#TRPBF |
| UC3842BD1R2 | Motorola Mobility LLC | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8 | UC3842BD1 vs UC3842BD1R2 |
| LT1242IS8#PBF | Linear Technology | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8 | UC3842BD1 vs LT1242IS8#PBF |
| LT1242IS8#TR | Linear Technology | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8 | UC3842BD1 vs LT1242IS8#TR |
| UC2842BD1G | onsemi | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO8 | UC3842BD1 vs UC2842BD1G |
UC3842BD1 Frequently Asked Questions (FAQ)
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The recommended operating voltage range for the UC3842BD1 is 12V to 28V, with a maximum rating of 30V.
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The choice of resistor values for the oscillator circuit depends on the desired switching frequency. A good starting point is to use the values recommended in the datasheet, and then adjust them based on the specific application requirements.
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The soft-start pin (SS) is used to gradually increase the output voltage during startup, reducing inrush currents and electromagnetic interference (EMI). To use it, connect a capacitor from the SS pin to ground, and a resistor from the SS pin to the output voltage. The capacitor value determines the soft-start time.
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To ensure stability, follow the layout guidelines in the datasheet, use a low-ESR output capacitor, and add a small capacitor (e.g., 10nF) between the Vcc pin and ground. Additionally, ensure that the feedback loop is properly compensated and the gain is set correctly.
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The UC3842BD1 can deliver up to 1A of output current, but this depends on the specific application and the external components used. It's essential to check the thermal performance and ensure that the device is properly heat-sinked.