| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
|
103 pcs
|
103 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request | |
|
40 pcs
|
40 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
| Category | |
| Manufacturer Name | |
| Duty Cycle (Max) | |
| Features | |
| Number of Pins | |
| Operating Temperature | |
| SVHC Present | |
| Topology |
The UC3844AN from Unitrode is a high-performance current mode PWM controller optimized for off-line and DC-DC converter applications. This device features a maximum switching frequency of 500kHz and a maximum duty cycle of 50%, making it suitable for efficient power supply designs.
Key electrical characteristics include a low start-up current of less than 0.5mA and a trimmed oscillator discharge current of 8.3mA. It also incorporates undervoltage lockout (UVLO) with hysteresis, typically set at 16V/10V, ensuring reliable operation under varying input conditions. The controller supports multiple topologies including Boost, Buck, Buck-Boost, Flyback, and Forward configurations.
Available in SOIC and PDIP packages, the UC3844AN offers features such as adjustable switching frequency, current limiting, dead time control, and an error amplifier. Its high-current totem pole output and internally trimmed bandgap reference contribute to its robust performance in demanding applications. The device is designed for operation within a temperature range of 0°C to 70°C.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.67 | $0.67 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
500kHz.
Boost, Buck, Buck boost, Flyback, Forward.
50%.
0°C to 70°C.
8-pin PDIP, 8-pin SOIC, and 14-pin SOIC.
Less than 0.5mA.
16V (start) and 10V (stop) with hysteresis.