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ON UC3845BVD1R2G
Boost, Flyback Regulator Positive, Isolation Capable Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 8-SOIC
Brands: ON
Mfr.Part #: UC3845BVD1R2G
Datasheet: UC3845BVD1R2G Datasheet (PDF)
Package/Case: SOP-8
Product Type: Power Management ICs
UC3845BVD1R2G 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 |
|---|---|---|---|
| Status | Active | CAD Models | |
| Compliance | PbAHP | Package Type | SOIC-8 |
| Case Outline | 751-07 | MSL Type | 1 |
| MSL Temp (°C) | 260 | Container Type | REEL |
| Container Qty. | 2500 | ON Target | N |
| Topology | Step-Up | Control Mode | Current Mode |
| fsw Typ (kHz) | 52 | Stand-by Mode | No |
| UVLO (V) | Yes | Short Circuit Protection | Yes |
| Latch | No | Soft Start | Yes |
| VCC Max (V) | 25 | Drive Cap. (mA) | 200 / 200 |
| Pricing ($/Unit) | $0.2613 |
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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Step1 :Product
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Step2 :Vacuum packaging
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Step3 :Anti-static bag
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Step4 :Individual packaging
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Step5 :Packaging boxes
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Step6 :bar-code shipping tag
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 UC3845BVD1R2G chip is a voltage mode PWM controller commonly used in switch-mode power supplies. It operates at high frequencies, allowing for efficient power conversion. Key features include adjustable frequency, cycle-by-cycle current limiting, and a totem pole output stage for driving power MOSFETs. This chip is widely used in various applications requiring precise voltage control and regulation.
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Features
The UC3845BVD1R2G is a voltage mode PWM controller featuring high speed operation, wide input voltage range, and low start-up current. It includes an error amplifier, an adjustable oscillator, a PWM comparator, a dead-time comparator, a soft-start circuit, and an output control function. -
Pinout
The UC3845BVD1R2G is a pulse-width modulation (PWM) controller IC with a 16-pin count. It is commonly used for controlling switch-mode power supplies. The precise pin functions can be found in the datasheet of the IC provided by the manufacturer. -
Manufacturer
The manufacturer of the UC3845BVD1R2G is ON Semiconductor. ON Semiconductor is a semiconductor manufacturing company that specializes in a wide range of products, including power management, analog, discrete, logic, and custom devices. -
Application Field
The UC3845BVD1R2G is a PWM controller primarily used in switching power supply applications. Its main application areas include power adapters, LED lighting, telecommunication power supplies, automotive power systems, and general-purpose power converters. It provides precise control over the switching frequency, duty cycle, and voltage regulation, making it suitable for various power management applications. -
Package
The UC3845BVD1R2G chip is available in a SOIC-8 package type, which measures approximately 3.9mm x 4.9mm in size.
Datasheet PDF
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