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ON UC3845BVD1G
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 #: UC3845BVD1G
Datasheet: UC3845BVD1G Datasheet (PDF)
Package/Case: SOIC-8
Product Type: Power Management ICs
RoHS Status:
Stock Condition: 2303 pcs, New Original
Warranty: 1 Year Ovaga Warranty - Find Out More
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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: | 50 % | Output Voltage: | 4.9 V to 5.1 V |
| Output Current: | 1 A | Minimum Operating Temperature: | - 40 C |
| Maximum Operating Temperature: | + 105 C | Mounting Style: | SMD/SMT |
| Package / Case: | SOIC-8 | Packaging: | Tube |
| Isolation: | Isolated | Series: | UC3845B |
| Type: | Current Mode PWM Controllers | Brand: | ON Semiconductor |
| Shutdown: | Shutdown | Fall Time: | 50 ns |
| Operating Supply Voltage: | 36 V | Product Type: | Switching Controllers |
| Rise Time: | 50 ns | Factory Pack Quantity: | 98 |
| Subcategory: | PMIC - Power Management ICs | Unit Weight: | 0.019048 oz |
| Tags | UC3845BVD1, UC3845BVD, UC3845BV, UC3845B, UC3845, UC384, UC38, UC3 |
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.
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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 UC3845BVD1G is a highly integrated PWM controller IC commonly used in switch-mode power supplies. It features a high-performance voltage mode control with adjustable frequency and duty cycle. This chip is capable of driving power MOSFETs and is designed for high efficiency and precision power conversion applications.
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Equivalent
The equivalent products of the UC3845BVD1G chip are TL3843B, TL3844B, TL3845B, SG3843D, SG3844D, and SG3845D. These devices are all pulse-width modulation controllers with similar specifications and functions. -
Features
The UC3845BVD1G is a high-performance fixed-frequency current-mode controller that is optimized for applications requiring precise control of the output voltage and current. It features an internal amplifier, soft start capability, oscillator synchronization, adjustable dead time control, and protection against overcurrent and overvoltage conditions. -
Pinout
The UC3845BVD1G is a PWM controller with a pin count of 8. It is commonly used in switch-mode power supplies to regulate the voltage output. The functions of the pins include controlling the duty cycle of the output waveform, feedback regulation, and error amplifier inputs. -
Manufacturer
The manufacturer of UC3845BVD1G is ON Semiconductor. ON Semiconductor is a global supplier of semiconductor-based solutions serving a wide range of industries, including automotive, consumer electronics, and industrial applications. They specialize in power management, signal conversion, and custom devices for various electronic devices and systems. -
Application Field
UC3845BVD1G is commonly used as a pulse-width modulation controller in voltage mode regulators, PFC converters, and DC-DC converters for applications such as power supplies, motor drives, LED drivers, and battery chargers. It is also used in systems requiring high efficiency and precise regulation of output voltage. -
Package
The UC3845BVD1G chip is available in a SOP-8 package type, surface mount form, and measures approximately 5.00mm x 4.00mm x 1.50mm in size.
Datasheet PDF
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