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| Place of Origin | Call |
| Brand Name | onsemi |
| Certification | ROHS |
| Model Number | UC2845BDG |
UC2845BDG DatasheetT
he UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off−Line and dc−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.
• 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
Specifications
| Attribute | Attribute Value |
|---|---|
| Manufacturer | onsemi |
| Product Category | DC DC Switching Controllers |
| Series | UC2845B |
| Packaging | Tube Alternate Packaging |
| Unit-Weight | 0.011923 oz |
| Mounting-Style | SMD/SMT |
| Package-Case | 14-SOIC (0.154", 3.90mm Width) |
| Operating-Temperature | -25°C ~ 85°C (TA) |
| Output-Type | Transistor Driver |
| Function | Step-Up, Step-Up/Step-Down |
| Supplier-Device-Package | 14-SOIC |
| Number-of-Outputs | 1 Output |
| Topology | Boost, Flyback |
| Voltage-Supply-Vcc-Vdd | 7.6 V ~ 30 V |
| Frequency-Switching | 52kHz |
| Control-Features | Frequency Control |
| Output-Configuration | Positive or Negative, Isolation Capable |
| Output-Phases | 1 |
| Duty-Cycle-Max | 0.48 |
| Synchronous-Rectifier | No |
| Clock-Sync | No |
| Serial-Interfaces | - |
| Maximum Operating Temperature | + 85 C |
| Operating temperature range | - 25 C |
| Operating-Supply-Voltage | 30 V |
| Output-Voltage | 4.95 V to 5.05 V |
| Output-Current | 1000 mA |
| Switching-Frequency | 500 kHz |
| Fall-Time | 50 ns |
| Rise-Time | 50 ns |
| Package-Case | SOIC-14 |
| Duty-Cycle-Max | 48 % |
Form,Package,Functional compatible component
Descriptions
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is a professional electronic marketing corporation entirely engaged in the fields of semi-conductors and electronic components sale and service for clients over 10 years, specialize in selling the new and unused, original factory sealed packing electronic components. specialize in IC,diode,transistor,IGBT,DC-DC converter.....***has set up our own sales service conception and has already established strong partnerships with many famous manufacturers and we have more than 5,000,000 kinds of electronic components for your choices, always at your services !
FAQ
Q: Are you trading company or manufacturer?
A: We are original manufacturer OF Integrated Circuit Chip . We can do OEM/ODM business.
Q: How long is your delivery time?
A: Group buying delivery time: 30-60 days; General delivery time: 20 days.
Q: What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery.
Q: How to buy your products?
A: You can buy the products from our company directly.Normally the procedure is sign the contract, payment by T/T,Contact the shipping company to delivery the goods to your country.Q: What is the warranty ?
A: The free warranty is one year from the day of Commissioning qualified.If there is any fault for our products within the free warranty period, we will repair it and change the fault assembly for free
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