UC3843AN
| Parameters | |
|---|---|
| Control Features | Frequency Control |
| Topology | Boost, Flyback |
| Control Mode | CURRENT-MODE |
| Frequency - Switching | Up to 500kHz |
| Input Voltage (Max) | 30V |
| Control Technique | PULSE WIDTH MODULATION |
| Rise Time | 40ns |
| Synchronous Rectifier | No |
| Fall Time (Typ) | 40 ns |
| Switcher Configuration | SINGLE |
| Max Duty Cycle | 100 % |
| Duty Cycle (Max) | 96% |
| Height Seated (Max) | 4.45mm |
| Width | 7.62mm |
| RoHS Status | Non-RoHS Compliant |
| Lead Free | Lead Free |
| Lifecycle Status | OBSOLETE (Last Updated: 1 week ago) |
| Mount | Through Hole |
| Mounting Type | Through Hole |
| Package / Case | 8-DIP (0.300, 7.62mm) |
| Number of Pins | 8 |
| Weight | 851mg |
| Operating Temperature | 0°C~70°C TA |
| Packaging | Tube |
| Published | 2000 |
| JESD-609 Code | e0 |
| Pbfree Code | no |
| Part Status | Obsolete |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Number of Terminations | 8 |
| ECCN Code | EAR99 |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Subcategory | Switching Regulator or Controllers |
| Technology | BIPOLAR |
| Terminal Position | DUAL |
| Terminal Pitch | 2.54mm |
| Frequency | 60kHz |
| Base Part Number | UC384*A |
| Function | Step-Up, Step-Up/Step-Down |
| Number of Outputs | 1 |
| Output Voltage | 5.1V |
| Output Type | Transistor Driver |
| Input Voltage-Nom | 15V |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Operating Supply Current | 17mA |
| Nominal Supply Current | 17mA |
| Output Configuration | Positive |
| Output Current | 1A |
| Voltage - Supply (Vcc/Vdd) | 8.4V~30V |
UC3843AN Description
The UC3842A and UC3843A series of high-performance fixed frequency current mode controllers are intended primarily for off-line and DC-to-DC converter applications, providing a cost-effective solution with few external components to the designer. A trimmed oscillator for precise duty cycle management, a temperature corrected reference, a high gain error amplifier, a current detecting comparator, and a high current totem pole output well suited for feeding a power MOSFET are all included in these integrated circuits.
Input and reference Undervoltage lockouts with hysteresis, cycle by cycle current limiting, programmable output deadtime, and a latch for single pulse metering are also provided as safety measures. The UC3843AN is offered in both an 8pin dual-inline and a 14pin plastic surface mount (SOIC14) packaging.
UC3843AN Features
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 ON Semiconductor SENSEFET? Products
Pb?Free Packages are Available
UC3843AN Applications
General-purpose amplifier
Switching applications
Power management
Industrial
