| Part Number | UC3854 Datasheet |
|---|---|
| Manufacturer | Texas Instruments |
| Overview |
The UC1854 provides active-power factor correction for power systems that otherwise would draw nonsinusoidal current from sinusoidal power lines. This device implements all the control functions neces.
*1 Control Boost PWM to 0.99 Power Factor * Limit Line-Current Distortion to < 5% * World-Wide Operation Without Switches * Feedforward Line Regulation * Average Current-Mode Control * Low Noise Sensitivity * Low Startup Supply Current * Fixed-Frequency PWM Drive * Low-Offset Analog Multiplier and D. |
UC3854 Datasheet PDF
The UC3854 is a High-Power Factor Preregulator.
| Part Number | UC3854 Datasheet |
|---|---|
| Description | ENHANCED HIGH POWER FACTOR PREREGULATOR |
| Manufacturer | Unisonic Technologies |
| Overview | The UTC UC3854 provide all the functions necessary for active power factor corrected preregulators. The controller achieves near unity power factor by shaping the AC input line current waveform to cor. such as wide bandwidth, low offset Current Amplifier, a faster responding and improved accuracy enable comparator, a VREF "good" comparator, UVLO threshold options (16/10V for offline, 10.5/10V for startup from an auxiliary 12V regulator), lower startup supply current, and an enhanced multiply/divid. |