Product Details
The 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.
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
Specifications
| Attribute | Attribute Value |
|---|
| Manufacturer | onsemi |
| Product Category | DC DC Switching Controllers |
| Series | - |
| Packaging | Tape & Reel (TR) |
| Package-Case | 8-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 | 8-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 | - |
Form,Package,Functional compatible component
Descriptions
Boost, Flyback Regulator Positive or Negative, Isolation Capable
Output Step-Up, Step-Up/Step-Down DC-DC Controller IC 8-SOIC
Who we are?
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
