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ON UC2845BD1R2G
Boost, Flyback Regulator Positive, Isolation Capable Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 8-SOIC
Brands: ON Semiconductor, LLC
Mfr.Part #: UC2845BD1R2G
Datasheet: UC2845BD1R2G Datasheet (PDF)
Package/Case: SOIC-8
Product Type: Power Management ICs
UC2845BD1R2G General Description
The UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off-Line and dc-to-dc converter applications offering the designer a cost-effective solution with minimal external components. These integrated circuits feature an oscillator, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.
Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle-by-cycle current limiting, a latch for single pulse metering, and a flip-flop which blanks the output off every other oscillator cycle, allowing output deadtimes to be programmed from 50% to 70%.
These devices are available in an 8-pin dual-in-line and surface mount (SO-8) plastic package as well as the 14-pin plastic surface mount (SO-14). The SO-14 package has separate power and ground pins for the totem pole output stage.
The UCX844B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off-line converters. The UCX845B is tailored for lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).
Features
- Trimmed Oscillator for Precise Frequency Control
- Oscillator Frequency Guaranteed at 250 kHz
- Current Mode Operation to 500 kHz Output Switching Frequency
- Output Deadtime Adjustable from 50% to 70%
- Automatic Feed Forward Compensation
- Latching PWM for Cycle-By-Cycle Current Limiting
- Internally Trimmed Reference with Undervoltage Lockout
- High Current Totem Pole Output
- Undervoltage Lockout with Hysteresis
- Low Startup and Operating Current
- Pb-Free Packages are Available
Application
ONSEMISpecifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Manufacturer: | ON Semiconductor | Product Category: | Switching Controllers |
| RoHS: | Y | Topology: | Boost, Flyback |
| Number of Outputs: | 1 Output | Switching Frequency: | 500 kHz |
| Duty Cycle - Max: | 48 % | Output Voltage: | 4.95 V to 5.05 V |
| Output Current: | 1 A | Minimum Operating Temperature: | - 25 C |
| Maximum Operating Temperature: | + 85 C | Mounting Style: | SMD/SMT |
| Package / Case: | SOIC-8 | Packaging: | Reel |
| Series: | UC2845B | Type: | Current Mode PWM Controllers |
| Brand: | ON Semiconductor | Fall Time: | 50 ns |
| Operating Supply Voltage: | 30 V | Product Type: | Switching Controllers |
| Rise Time: | 50 ns | Factory Pack Quantity: | 2500 |
| Subcategory: | PMIC - Power Management ICs | Unit Weight: | 0.019048 oz |
| Tags | UC2845BD1R2G, UC2845BD1R2, UC2845BD1R, UC2845BD1, UC2845BD, UC2845B, UC2845, UC284, UC28, UC2 | Source Content uid | UC2845BD1R2G |
| Pbfree Code | Yes | Part Life Cycle Code | Active |
| Ihs Manufacturer | ONSEMI | Part Package Code | SOIC-8 Narrow Body |
| Package Description | ROHS COMPLIANT, SOIC-8 | Pin Count | 8 |
| Manufacturer Package Code | 751-07 | Reach Compliance Code | compliant |
| ECCN Code | EAR99 | HTS Code | 8542.39.00.01 |
| Factory Lead Time | 34 Weeks | Samacsys Manufacturer | onsemi |
| Analog IC - Other Type | SWITCHING CONTROLLER | Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION | JESD-30 Code | R-PDSO-G8 |
| Moisture Sensitivity Level | 1 | Number of Functions | 1 |
| Number of Terminals | 8 | Package Body Material | PLASTIC/EPOXY |
| Package Code | SOP | Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR | Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 | Surface Mount | YES |
| Switcher Configuration | SINGLE | Technology | BIPOLAR |
| Temperature Grade | OTHER | Terminal Finish | MATTE TIN |
| Terminal Form | GULL WING | Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
Shipping
| Shipping Type | Ship Fee | Lead Time | |
|---|---|---|---|
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DHL | $20.00-$40.00 (0.50 KG) | 2-5 days |
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Fedex | $20.00-$40.00 (0.50 KG) | 2-5 days |
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UPS | $20.00-$40.00 (0.50 KG) | 2-5 days |
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TNT | $20.00-$40.00 (0.50 KG) | 2-5 days |
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EMS | $20.00-$40.00 (0.50 KG) | 2-5 days |
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REGISTERED AIR MAIL | $20.00-$40.00 (0.50 KG) | 2-5 days |
Processing Time：Shipping fee depend on different zone and country.
Payment
| Terms of payment | Hand Fee | |
|---|---|---|
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Wire Transfer | charge US$30.00 banking fee. |
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Paypal | charge 4.0% service fee. |
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Credit Card | charge 3.5% service fee. |
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Western Union | charge US.00 banking fee. |
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Money Gram | charge US$0.00 banking fee. |
Guarantees
1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.
2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.
Packing
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All the products will packing in anti-staticbag. Ship with ESD antistatic protection.
Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.
We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.
After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.
Part points
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The UC2845BD1R2G chip is an integrated circuit (IC) that is commonly used in power supply applications. It is a current-mode PWM controller which helps regulate the output voltage in switch-mode power supplies. It provides protection features such as soft start, overcurrent protection, and over-voltage protection. The chip is widely used in various electronic devices for efficient power management.
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Equivalent
The equivalent products of the UC2845BD1R2G chip are: UC3842BD1R2G, UC3843BD1R2G, UC3844BD1R2G, and UC3845BD1R2G. These chips are part of the same UCx84x series and have similar functionalities. -
Features
The features of UC2845BD1R2G include a duty cycle range up to 100%, adjustable switching frequency, internally trimmed oscillator, precision reference, error amplifier with high output current, and soft-start. It also comprises an under-voltage lockout, pulse-by-pulse current limiting, and a totem pole output. -
Pinout
The UC2845BD1R2G is a pulse width modulation (PWM) controller IC. It has an 8-pin SOIC (Small Outline Integrated Circuit) package. The pin count is 8, and the functions include power supply, feedback control, oscillator, error amplifier, and PWM output. -
Manufacturer
The manufacturer of the UC2845BD1R2G is ON Semiconductor. ON Semiconductor is a leading supplier of semiconductor-based solutions, specializing in power management and energy-efficient devices for a wide range of industries, including automotive, industrial, medical, and consumer electronics. -
Application Field
The UC2845BD1R2G is a pulse width modulation (PWM) controller IC that is commonly used in switch-mode power supplies (SMPS), LED drivers, battery chargers, and other power conversion applications. It provides precise control of the output voltage/current and regulation of the power supply. -
Package
The UC2845BD1R2G chip is available in a package type known as SOIC, with a pin configuration of 8 pins. The form of the chip is surface mount. The overall size of the package is small, typically measuring around 5.3mm x 6.2mm.
Datasheet PDF
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