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Part Details for UC3845DTR by Texas Instruments
Results Overview of UC3845DTR by Texas Instruments
- Distributor Offerings: (7 listings)
- Number of FFF Equivalents: (2 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
UC3845DTR Information
UC3845DTR 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 UC3845DTR
| Part # | Distributor | Description | Stock | Price | Buy | |
|---|---|---|---|---|---|---|
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DISTI #
2156-UC3845DTR-ND
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DigiKey | IC REG CTRLR MULT TOP 14SOIC Min Qty: 1 Lead time: 12 Weeks Container: Bulk MARKETPLACE PRODUCT |
9600 In Stock |
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$0.6200 | Buy Now |
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DISTI #
296-38314-1-ND
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DigiKey | IC REG CTRLR MULT TOP 14SOIC Min Qty: 1 Lead time: 12 Weeks Container: Digi-Reel®, Cut Tape (CT), Tape & Reel (TR) |
4700 In Stock |
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$0.4663 / $1.0400 | Buy Now |
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DISTI #
595-UC3845DTR
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Mouser Electronics | Switching Controllers Current-Mode PWM Con troller A 595-UC3845D RoHS: Compliant | 1270 |
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$0.4540 / $1.7300 | Buy Now |
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DISTI #
86042290
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Verical | Current Mode PWM Controller 200mA 500kHz 14-Pin SOIC T/R RoHS: Compliant Min Qty: 507 Package Multiple: 1 Date Code: 1101 | Americas - 7100 |
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$0.7409 | Buy Now |
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DISTI #
86042727
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Verical | Current Mode PWM Controller 200mA 500kHz 14-Pin SOIC T/R RoHS: Compliant Min Qty: 507 Package Multiple: 1 | Americas - 2500 |
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$0.7409 | Buy Now |
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Rochester Electronics | UC3845 Current Mode PWM Controller RoHS: Compliant Status: Active Min Qty: 1 | 9600 |
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$0.3675 / $0.5927 | Buy Now |
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Cytech Systems Limited | IC REG CTRLR MULT TOP 14SOIC | 625 |
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RFQ |
Part Details for UC3845DTR
UC3845DTR CAD Models
UC3845DTR Part Data Attributes
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UC3845DTR
Texas Instruments
Buy Now
Datasheet
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Compare Parts:
UC3845DTR
Texas Instruments
Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, 0C to 70C 14-SOIC 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 | SOIC | |
| Package Description | GREEN, PLASTIC, MS-012AB, SOIC-14 | |
| Pin Count | 14 | |
| Reach Compliance Code | compliant | |
| ECCN Code | EAR99 | |
| HTS Code | 8542.39.00.01 | |
| 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-PDSO-G14 | |
| JESD-609 Code | e4 | |
| Length | 8.65 mm | |
| Moisture Sensitivity Level | 1 | |
| Number of Functions | 1 | |
| Number of Terminals | 14 | |
| 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 | SOP14,.25 | |
| Package Shape | RECTANGULAR | |
| Package Style | SMALL OUTLINE | |
| Peak Reflow Temperature (Cel) | 260 | |
| Qualification Status | Not Qualified | |
| Seated Height-Max | 1.75 mm | |
| Supply Current-Max (Isup) | 25 mA | |
| Supply Voltage-Max (Vsup) | 28 V | |
| Supply Voltage-Min (Vsup) | 8.4 V | |
| Surface Mount | YES | |
| Switcher Configuration | BUCK-BOOST | |
| 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) | 30 | |
| Width | 3.9 mm |
Alternate Parts for UC3845DTR
This table gives cross-reference parts and alternative options found for UC3845DTR. 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 UC3845DTR, 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 |
|---|---|---|---|---|
| UC3845D | Texas Instruments | $0.7089 | Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, 0C to 70C 14-SOIC 0 to 70 | UC3845DTR vs UC3845D |
| UC3845DR | Texas Instruments | Check for Price | 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO14, PLASTIC, MS-012AB, SOIC-14 | UC3845DTR vs UC3845DR |
UC3845DTR Frequently Asked Questions (FAQ)
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The maximum voltage rating for the UC3845DTR is 30V. However, it's recommended to operate it within 15V to ensure reliable operation and to prevent damage to the internal circuitry.
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The resistor values for the oscillator circuit (Rt and Ct) depend on the desired switching frequency. A good starting point is to use the values recommended in the datasheet (Rt = 10kΩ and Ct = 3.3nF for 250kHz). You can then adjust these values to achieve the desired frequency using the formula: Fs = 1 / (2.86 * Rt * Ct).
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The soft-start pin (SS) is used to gradually increase the output voltage during startup, reducing inrush current and preventing voltage overshoots. To use it, connect a capacitor (typically 10nF to 100nF) from the SS pin to ground, and a resistor (typically 1kΩ to 10kΩ) from the SS pin to the output voltage. This will create a ramp-up time of around 1-10ms.
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To ensure stable operation with a wide input voltage range, it's essential to use a voltage regulator (such as the TLV703) to regulate the supply voltage to the UC3845DTR. This will prevent the internal circuitry from malfunctioning due to voltage variations. Additionally, use a suitable input capacitor to filter out noise and ripple.
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The maximum output current capability of the UC3845DTR is dependent on the specific application and the external components used. However, as a general guideline, the output current should not exceed 1A. If higher output currents are required, consider using an external driver or a more powerful controller.