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Part Details for UC3843BN by STMicroelectronics
Results Overview of UC3843BN by STMicroelectronics
- Distributor Offerings: (22 listings)
- Number of FFF Equivalents: (5 replacements)
- CAD Models: (Available)
- 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
UC3843BN Information
UC3843BN 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 UC3843BN
| Part # | Distributor | Description | Stock | Price | Buy | |
|---|---|---|---|---|---|---|
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DISTI #
51AC9705
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Newark | Pwm Cont, Current Mode, 500Khz, Minidip, Input Voltage:15V, Output Voltage:5V, Output Current:1A, Supply Voltage Min:-, Supply Voltage Max:-, Controller Ic Case Style:Minidip, No. Of Pins:8Pins, Frequency:500Khz, Operating Rohs Compliant: Yes |Stmicroelectronics UC3843BN RoHS: Compliant Min Qty: 1 Package Multiple: 1 Date Code: 1 Container: Bulk | 515 |
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$0.3550 / $0.8200 | Buy Now |
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DISTI #
497-6786-5-ND
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DigiKey | IC REG CTRLR BST/FLYBK 8-MINIDIP Min Qty: 1 Lead time: 14 Weeks Container: Tube |
677 In Stock |
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$0.3800 / $0.8400 | Buy Now |
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DISTI #
511-UC3843BN
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Mouser Electronics | Switching Controllers 0.5mA Current Mode RoHS: Compliant | 3294 |
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$0.3550 / $0.6700 | Buy Now |
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DISTI #
E02:0323_00205669
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Arrow Electronics | Current Mode PWM Controller 1A 500kHz 8-Pin Mini-DIP Tube RoHS: Compliant Min Qty: 1 Package Multiple: 1 Lead time: 14 Weeks Date Code: 2512 | Europe - 10510 |
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$0.2972 / $0.5956 | Buy Now |
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DISTI #
V36:1790_06568300
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Arrow Electronics | Current Mode PWM Controller 1A 500kHz 8-Pin Mini-DIP Tube RoHS: Compliant Min Qty: 2000 Package Multiple: 2000 Lead time: 14 Weeks Date Code: 2429 | Americas - 8000 |
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$0.3247 / $0.3601 | Buy Now |
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STMicroelectronics | Current Mode PWM COO: China RoHS: Compliant Min Qty: 1 | 3297 |
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$0.4100 / $0.6600 | Buy Now |
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Future Electronics | UC3843B Series 30 V 17 mA High Performance Current Mode PWM Controller - DIP-8 RoHS: Compliant pbFree: Yes Min Qty: 1 Package Multiple: 1 Lead time: 14 Weeks Container: Tube | 4Tube |
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$0.3250 / $0.3700 | Buy Now |
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Future Electronics | UC3843B Series 30 V 17 mA High Performance Current Mode PWM Controller - DIP-8 RoHS: Compliant pbFree: Yes Min Qty: 4000 Package Multiple: 50 Lead time: 14 Weeks Container: Tube | 0Tube |
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$0.3250 / $0.3650 | Buy Now |
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DISTI #
88074549
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Verical | Current Mode PWM Controller 1A 500kHz 8-Pin Mini-DIP Tube RoHS: Compliant Min Qty: 28 Package Multiple: 1 Date Code: 2512 | Americas - 10510 |
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$0.2958 / $0.4640 | Buy Now |
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DISTI #
86926248
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Verical | Current Mode PWM Controller 1A 500kHz 8-Pin Mini-DIP Tube RoHS: Compliant Min Qty: 2000 Package Multiple: 2000 Date Code: 2429 | Americas - 8000 |
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$0.3247 / $0.3601 | Buy Now |
Part Details for UC3843BN
UC3843BN CAD Models
UC3843BN Part Data Attributes
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UC3843BN
STMicroelectronics
Buy Now
Datasheet
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Compare Parts:
UC3843BN
STMicroelectronics
Current Mode PWM
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| Rohs Code | Yes | |
| Part Life Cycle Code | Active | |
| parentfamilyid | 4194376 | |
| Ihs Manufacturer | STMICROELECTRONICS | |
| Part Package Code | DIP | |
| Package Description | MINI, DIP-8 | |
| Pin Count | 8 | |
| Reach Compliance Code | compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.01 | |
| Schedule B Code | 8542.39.00.00 | |
| Factory Lead Time | 14 Weeks | |
| kg CO2e/kg | 12.04 | |
| Average Weight (mg) | 569.675 | |
| CO2e (mg) | 6858.887 | |
| Samacsys Description | UC3843BN, PWM Current Mode Controller, 1 A Boost, Flyback, 500 kHz 8-Pin PDIP | |
| Samacsys Manufacturer | STMicroelectronics | |
| Samacsys Modified On | 2023-03-07 16:10:32 | |
| Total Weight | 428 | |
| Category CO2 Kg | 504 | |
| CO2 | 215712 | |
| Compliance Temperature Grade | Commercial: +0C to +70C | |
| EU RoHS Version | RoHS 2 (2015/863/EU) | |
| Candidate List Date | 2025-01-21 | |
| CAS Accounted for Wt | 90 | |
| EFUP | e | |
| Conflict Mineral Status | DRC Conflict Free Undeterminable | |
| Conflict Mineral Status Source | CMRT V6.31 | |
| Analog IC - Other Type | SWITCHING CONTROLLER | |
| Control Mode | CURRENT-MODE | |
| Control Technique | PULSE WIDTH MODULATION | |
| Input Voltage-Max | 30 V | |
| Input Voltage-Min | 8.2 V | |
| Input Voltage-Nom | 15 V | |
| JESD-30 Code | R-PDIP-T8 | |
| JESD-609 Code | e3 | |
| 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 | DIP | |
| Package Equivalence Code | DIP8,.3 | |
| Package Shape | RECTANGULAR | |
| Package Style | IN-LINE | |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED | |
| Qualification Status | Not Qualified | |
| Seated Height-Max | 5.08 mm | |
| Surface Mount | NO | |
| Switcher Configuration | SINGLE | |
| Switching Frequency-Max | 500 kHz | |
| Technology | BIPOLAR | |
| Temperature Grade | COMMERCIAL | |
| Terminal Finish | Matte Tin (Sn) | |
| 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 UC3843BN
This table gives cross-reference parts and alternative options found for UC3843BN. 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 UC3843BN, 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 |
|---|---|---|---|---|
| UC3843BNG | Rochester Electronics LLC | Check for Price | 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDIP8, HALOGEN AND LEAD FREE, PLASTIC, DIP-8 | UC3843BN vs UC3843BNG |
| UC3843BN | onsemi | Check for Price | 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDIP8, PLASTIC, DIP-8 | UC3843BN vs UC3843BN |
| UC3843N | Fairchild Semiconductor Corporation | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP8, DIP-8 | UC3843BN vs UC3843N |
| KA3843B | Samsung Semiconductor | Check for Price | Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDIP8, 0.300 INCH, DIP-8 | UC3843BN vs KA3843B |
| UC3843N | STMicroelectronics | Check for Price | 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDIP8, 0.300 INCH, MINI, DIP-8 | UC3843BN vs UC3843N |
UC3843BN Frequently Asked Questions (FAQ)
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The maximum operating frequency of UC3843BN is 500 kHz. However, it's recommended to operate it at a frequency between 100 kHz to 400 kHz for optimal performance.
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The values of RT and CT depend on the desired oscillator frequency and the specific application. A good starting point is to use the values recommended in the datasheet (RT = 10 kΩ, CT = 3.3 nF) and then adjust them based on the actual circuit performance.
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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). Connect a capacitor (typically 10 nF to 100 nF) from the SS pin to ground and a resistor (typically 1 kΩ to 10 kΩ) from the SS pin to the output voltage.
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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 (typically 10 nF to 100 nF) between the output and ground. Also, ensure that the input voltage is well-regulated and the output voltage is properly filtered.
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The UC3843BN is designed to handle output currents up to 1.5 A. However, the actual output current capability depends on the specific application, PCB layout, and thermal management.