Description
ON Semiconductor High Performance
Current Mode Controllers
The UC3842B, UC3843B series are high performance fixed
frequency current mode controllers.
They are specifically designed for Off−Line and DC−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.
Also included are protective features consisting of input and
reference undervoltage lockouts each with hysteresis, cycle−by−cycle
current limiting, programmable output deadtime, and a latch for single
pulse metering.
These devices are available here in an 8−pin dual−in−line package
Select 5, 10, 20 or 40 Pieces
| Attribute | Value |
|---|---|
| Number of PWM Outputs | 1 |
| Control Method | Current |
| Topology | Boost, Flyback, Forward |
| Rise Time | 50ns |
| Fall Time | 50ns |
| Maximum Duty Cycle | 96% |
| Maximum Switching Frequency | 500 kHz |
| Mounting Type | Through Hole |
| Package Type | PDIP |
| Pin Count | 8 |
| Output Current | 1 A |
| Width | 6.6mm |
| Dimensions | 10.16 x 6.6 x 3.44mm |
| Length | 10.16mm |
| Maximum Operating Temperature | +70 °C |
| Height | 3.44mm |
| Minimum Operating Temperature | 0 °C |
As many of our lines come in to us as surplus – sometimes from high end ‘Milspec’ type manufacturers we try to pass on our savings to our customers – often selling industrial grade or military spec components rather than the commercial equivalent.
