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Part Details for UC2845NG4 by Texas Instruments
Results Overview of UC2845NG4 by Texas Instruments
- Distributor Offerings: (3 listings)
- Number of FFF Equivalents: (4 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
Industrial Automation
Energy and Power Systems
Renewable Energy
UC2845NG4 Information
UC2845NG4 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 UC2845NG4
| Part # | Distributor | Description | Stock | Price | Buy | |
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DISTI #
595-UC2845NG4
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Mouser Electronics | Switching Controllers Current-Mode PWM Con troller ALT 595-UC2845N RoHS: Compliant | 650 |
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$0.7020 / $2.4100 | Buy Now |
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Vyrian | Other Function Semiconductors | 456 |
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RFQ | |
|
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Win Source Electronics | IC REG CTRLR MULT TOPOLOGY 8DIP | 250 |
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$1.0427 / $1.5640 | Buy Now |
Part Details for UC2845NG4
UC2845NG4 CAD Models
UC2845NG4 Part Data Attributes
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UC2845NG4
Texas Instruments
Buy Now
Datasheet
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Compare Parts:
UC2845NG4
Texas Instruments
Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, -40C to 85C 8-PDIP -40 to 85
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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 | GREEN, PLASTIC, DIP-8 | |
| Pin Count | 8 | |
| 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 | 7.6 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 Outputs | 1 | |
| Number of Terminals | 8 | |
| Operating Temperature-Max | 85 °C | |
| Operating Temperature-Min | -40 °C | |
| Output Current-Max | 1 A | |
| Output Voltage-Max | 80 V | |
| 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 | INDUSTRIAL | |
| 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 UC2845NG4
This table gives cross-reference parts and alternative options found for UC2845NG4. 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 UC2845NG4, 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 |
|---|---|---|---|---|
| UC3845N | Texas Instruments | $0.7885 | Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, 0C to 70C 8-PDIP 0 to 70 | UC2845NG4 vs UC3845N |
| UC2845N | Texas Instruments | $0.7890 | Single ended 500KHz current mode PWM controller with 8.4V/7.6V UVLO 50% duty cycle, -40C to 85C 8-PDIP -40 to 85 | UC2845NG4 vs UC2845N |
| UC3845AJ | Texas Instruments | Check for Price | Current Mode PWM Controller 8-CDIP 0 to 70 | UC2845NG4 vs UC3845AJ |
| UC2845J | Texas Instruments | Check for Price | Current-Mode PWM Controller 8-CDIP -40 to 85 | UC2845NG4 vs UC2845J |
UC2845NG4 Frequently Asked Questions (FAQ)
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The UC2845NG4 is a high-frequency switching regulator, and proper PCB layout is crucial for its operation. TI recommends a 4-layer PCB with a solid ground plane, and the use of vias to connect the top and bottom layers. The input and output capacitors should be placed close to the IC, and the switching node (pin 5) should be kept away from sensitive nodes. A good layout will help reduce EMI and improve the regulator's performance.
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The choice of inductor depends on the output current, switching frequency, and desired ripple current. TI recommends using an inductor with a high saturation current, low DC resistance, and a high self-resonant frequency. The inductor value should be chosen to achieve the desired output ripple voltage. A good starting point is to use an inductor with a value between 10uH to 22uH, and then adjust based on the specific design requirements.
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The UC2845NG4 has an absolute maximum input voltage rating of 18V. However, the recommended maximum input voltage is 15V to ensure reliable operation and to prevent damage to the internal components. Exceeding the recommended input voltage may reduce the regulator's lifespan or cause it to fail.
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The UC2845NG4 requires a compensation network to ensure stability. TI recommends using a Type II compensation network, which consists of a resistor, capacitor, and resistor (R-C-R) connected between the output and the feedback pin. The values of the compensation components depend on the output voltage, output current, and desired transient response. TI provides a compensation calculator tool to help designers determine the optimal compensation values.
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The bootstrap capacitor (CBOOT) is used to generate the gate drive voltage for the internal power MOSFET. It is charged through the internal diode (D1) when the input voltage is present. The bootstrap capacitor value should be chosen to ensure that the gate drive voltage is sufficient to fully enhance the power MOSFET. A typical value for CBOOT is 10nF to 22nF.