| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
|
3,566 pcs
|
3566 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
| Category | |
| Manufacturer Name | |
| Clock Sync | |
| Control Features | |
| Duty Cycle (Max) | |
| Frequency | |
| Function | |
| Mounting Type | |
| Number of Outputs | |
| Operating Temperature | |
| Output Configuration | |
| Output Current | |
| Output Phases | |
| Output Type | |
| Supplier Device Package | |
| Supplier Package | |
| Synchronous Rectifier | |
| Topology | |
| Voltage |
The UC3843N from Texas Instruments is a fixed-frequency, current-mode Pulse Width Modulation (PWM) controller. It is optimized for off-line and DC-to-DC converter applications, requiring minimal external components. This controller features a precise oscillator for duty cycle control, a temperature-compensated reference, and a high-gain error amplifier.
Key electrical characteristics include a supply voltage range of 12V to 28V, a maximum operating frequency of 500kHz, and a maximum duty cycle of 97%. It also incorporates undervoltage lockout (UVLO) with hysteresis, with thresholds typically at 8.5V (on) and 7.9V (off). The device offers low start-up current, less than 1mA.
The UC3843N is housed in an 8-PDIP package and is designed for through-hole mounting. Its operating temperature range is from 0°C to 70°C (TA). The controller is suitable for various topologies including Boost, Buck, Buck-Boost, Flyback, and Forward converters, providing a versatile solution for power management designs.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.78 | $0.78 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The UC3843N operates with a supply voltage from 12V to 28V.
The UC3843N is available in an 8-DIP (0.300", 7.62mm) through-hole package, also referred to as 8-PDIP.
The operating temperature range is 0°C to 70°C (TA).
The UC3843N supports a maximum switching frequency of 500kHz.
The maximum duty cycle is 97%.
The output current is rated at ±1A.
The UVLO thresholds are 8.5V on and 7.9V off.