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TEXAS INSTRUMENTS UC3854N
PFC Controller IC, 15 V to 35 V & 10 mA Supply, 15 V Lockout, 95 % Duty Cycle, 102 kHz, DIP-16
- 製造商產品編號:
- UC3854N
- 訂購代碼：
- 3123642
-
- ECAD / MCAD
-
產品總覽
The UC3854N is a High Power Factor Preregulator that provides active power factor correction for power systems that otherwise would draw non-sinusoidal current from sinusoidal power lines. This device implements all the control functions necessary to build a power supply capable of optimally using available power-line current while minimizing line-current distortion. To do this, it contains a voltage amplifier, an analogue multiplier/divider, a current amplifier and a fixed-frequency PWM. In addition, the UC3854 contains a power MOSFET compatible gate driver, 7.5V reference, line anticipator, load-enable comparator, low-supply detector and over-current comparator. The UC3854 uses average current-mode control to accomplish fixed-frequency current control with stability and low distortion. Unlike peak current-mode, average current control accurately maintains sinusoidal line current without slope compensation and with minimal response to noise transients.
- Control boost PWM to 0.99 power factor
- Limit line current distortion to <5%
- World-wide operation without switches
- Feed-forward line regulation
- Average current-mode control
- Low noise sensitivity
- Low start-up supply current
- Fixed-frequency PWM drive
- Low-offset analogue multiplier/divider
- 1A Totem-pole gate driver
- Precision voltage reference
- Green product and no Sb/Br
應用
Power Management
產品訊息
技術文件 (1)
開放補貨預購
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