Product Details
The UC3842A, UC3843A series of high performance fixed frequency
current mode controllers 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 a trimmed oscillator for precise duty
cycle control, 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.
The UCX842A has UYLO thresholds of 16 V (on) and 10 V (off),
ideally suited for off–line converters. The UCX843A is tailored for
lower voltage applications having UVLO thresholds of 8.5 V (on) and
7.6 V (off).
• Trimmed Oscillator Discharge Current for Precise Duty Cycle
Control
• Current Mode Operation to 500 kHz
• 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
• Direct Interface with Motorola SENSEFET Products
Specifications
| Attribute | Attribute Value |
|---|
| Manufacturer | onsemi |
| Product Category | DC DC Switching Controllers |
| Series | UC2843A |
| Packaging | Tube |
| Unit-Weight | 0.018646 oz |
| Mounting-Style | Through Hole |
| Package-Case | 8-DIP (0.300", 7.62mm) |
| Operating-Temperature | -40°C ~ 85°C (TA) |
| Output-Type | Transistor Driver |
| Function | Step-Down |
| Supplier-Device-Package | 8-PDIP |
| Number-of-Outputs | 1 Output |
| Topology | Buck |
| Voltage-Supply-Vcc-Vdd | 8.4 V ~ 30 V |
| Frequency-Switching | 52kHz |
| Control-Features | Frequency Control |
| Output-Configuration | Positive, Isolation Capable |
| Output-Phases | 1 |
| Duty-Cycle-Max | 0.96 |
| Synchronous-Rectifier | Yes |
| Clock-Sync | No |
| Serial-Interfaces | - |
| Maximum Operating Temperature | + 85 C |
| Operating temperature range | - 40 C |
| Operating-Supply-Voltage | 30 V |
| Output-Voltage | 4.95 V to 5.05 V |
| Output-Current | 1000 mA |
| Switching-Frequency | 450 kHz |
| Fall-Time | 50 ns |
| Rise-Time | 50 ns |
| Package-Case | PDIP-8 |
| Duty-Cycle-Max | 100 % |
Form,Package,Functional compatible component
Descriptions
Buck Regulator Positive, Isolation Capable Output Step-Down DC-DC
Controller IC 8-PDIP
UCx84xA Current-Mode PWM Controller
Switching Controllers Current Mode
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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
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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
