Part Details for UC3845N by Texas Instruments
Results Overview of UC3845N by Texas Instruments
- Distributor Offerings: (4 listings)
- Number of FFF Equivalents: (4 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
UC3845N Information
UC3845N by Texas Instruments 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 UC3845N
| Part # | Distributor | Description | Stock | Price | Buy | |
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DISTI #
3123562
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Farnell | IC, CONTROLLER, PWM RoHS: Compliant Min Qty: 1 Lead time: 13 Weeks, 1 Days Container: Each | 1073 |
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$0.9448 / $2.9345 | Buy Now |
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DISTI #
UC3845N
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TME | IC: PMIC, PWM controller, 1A, 47÷500kHz, Ch: 1, DIP8, 8.4÷28V, 0÷48% Min Qty: 1 | 320 |
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$1.1100 / $1.4900 | Buy Now |
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Ameya Holding Limited | 3180 |
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RFQ | ||
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LCSC | 50kHz250kHz DIP-8 DC DC Switching Controllers RoHS | 12 |
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$0.9488 / $1.0076 | Buy Now |
US Tariff Estimator: UC3845N by Texas Instruments
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 UC3845N
UC3845N CAD Models
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UC3845N Part Data Attributes
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UC3845N
Texas Instruments
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Datasheet
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UC3845N
Texas Instruments
Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, 0C to 70C 8-PDIP 0 to 70
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| Pbfree Code | Yes | |
| Rohs Code | Yes | |
| Part Life Cycle Code | Active | |
| Ihs Manufacturer | TEXAS INSTRUMENTS INC | |
| Part Package Code | DIP | |
| Package Description | DIP, DIP8,.3 | |
| Pin Count | 8 | |
| Reach Compliance Code | Compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.60 | |
| Samacsys Manufacturer | Texas Instruments | |
| Analog IC - Other Type | SWITCHING CONTROLLER | |
| Control Mode | CURRENT-MODE | |
| Control Technique | PULSE WIDTH MODULATION | |
| Input Voltage-Max | 28 V | |
| Input Voltage-Min | 8.2 V | |
| Input Voltage-Nom | 15 V | |
| JESD-30 Code | R-PDIP-T8 | |
| JESD-609 Code | e4 | |
| Length | 9.59 mm | |
| Number of Functions | 1 | |
| Number of Terminals | 8 | |
| Operating Temperature-Max | 70 °C | |
| Operating Temperature-Min | ||
| Output Current-Max | 1 A | |
| Output Voltage-Nom | 5 V | |
| Package Body Material | PLASTIC/EPOXY | |
| Package Code | DIP | |
| Package Equivalence Code | DIP8,.3 | |
| Package Shape | RECTANGULAR | |
| Package Style | IN-LINE | |
| Qualification Status | Not Qualified | |
| Seated Height-Max | 5.08 mm | |
| Supply Current-Max (Isup) | 25 mA | |
| Supply Voltage-Max (Vsup) | 28 V | |
| Supply Voltage-Min (Vsup) | 8.4 V | |
| Surface Mount | NO | |
| Switcher Configuration | BUCK-BOOST | |
| Switching Frequency-Max | 500 kHz | |
| Technology | BICMOS | |
| Temperature Grade | COMMERCIAL | |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) | |
| Terminal Form | THROUGH-HOLE | |
| Terminal Pitch | 2.54 mm | |
| Terminal Position | DUAL | |
| Width | 7.62 mm |
Alternate Parts for UC3845N
This table gives cross-reference parts and alternative options found for UC3845N. 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 UC3845N, 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 |
|---|---|---|---|---|
| UC2845N | Texas Instruments | $0.7892 | Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, -40C to 85C 8-PDIP -40 to 85 | UC3845N vs UC2845N |
| UC2845J | Texas Instruments | Check for Price | Current-Mode PWM Controller 8-CDIP -40 to 85 | UC3845N vs UC2845J |
| UC3845AJ | Texas Instruments | Check for Price | Current Mode PWM Controller 8-CDIP 0 to 70 | UC3845N vs UC3845AJ |
| UC2845NG4 | Texas Instruments | Check for Price | Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, -40C to 85C 8-PDIP -40 to 85 | UC3845N vs UC2845NG4 |
UC3845N Frequently Asked Questions (FAQ)
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The maximum voltage rating of the UC3845N is 30V. However, it's recommended to operate it within 15V to ensure reliable operation.
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The frequency of the UC3845N can be calculated using the formula: f = 1.44 / (RT * CT), where RT is the resistance of the timing resistor and CT is the capacitance of the timing capacitor.
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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 spikes. It can be connected to a capacitor to ground to set the soft-start time.
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The UC3845N's voltage feedback loop can be compensated using a type II compensator, which consists of a series resistor and capacitor connected between the output of the error amplifier and the inverting input of the comparator.
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The maximum duty cycle of the UC3845N is 99%. However, it's recommended to operate it within 90% to ensure reliable operation and prevent overheating.