| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
|
8,600 pcs
|
8600 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request | |
|
7,450 pcs
|
7450 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request | |
|
5,000 pcs
|
5000 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request | |
|
250 pcs
|
250 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 | |
| Lead Spacing | |
| Mounting Type | |
| Number of Outputs | |
| Operating Temperature | |
| Output Configuration | |
| Output Phases | |
| Output Type | |
| Supplier Device Package | |
| Synchronous Rectifier | |
| Topology | |
| Voltage |
The UC3843BN from STMicroelectronics is a fixed-frequency, current mode controller designed for efficient Off-Line and DC-DC converter applications. It offers a cost-effective solution with minimal external components, featuring a trimmed oscillator for precise duty cycle control and a temperature-compensated reference.
Key electrical specifications include an operating voltage range of 7.6V to 30V and a maximum operating frequency of 500kHz. The controller supports boost and flyback topologies and provides a transistor driver output. Protective features include undervoltage lockout with hysteresis and cycle-by-cycle current limiting.
This component is housed in an 8-pin Mini DIP package suitable for through-hole mounting. The UC3843B variant is tailored for lower voltage applications with UVLO thresholds of 8.5V (on) and 7.6V (off).
Designed for applications requiring precise control and protection, the UC3843BN is a versatile choice for power supply designs.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.78 | $0.78 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The UC3843BN operates with a supply voltage range of 7.6V to 30V.
The UC3843BN is available in an 8-DIP (0.300", 7.62mm) package with through-hole mounting, also known as 8-Mini DIP.
The operating temperature range is 0°C to 70°C (junction).
The UC3843BN supports boost and flyback topologies (step-up and step-up/step-down functions).
The maximum duty cycle is 96%.
The UVLO thresholds are 8.5V (turn-on) and 7.6V (turn-off).
No, the UC3843BN does not support synchronous rectification.