Power Factor Controllers | FAN4800AU

CCM PFC + PWM 组合控制器，线路下垂保护

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高度集成的 FAN4800AU 部件设计用于由升压型 PFC 和 PWM 组成的电源。它们仅需要极少的外部元件便可实现各种保护和补偿。它们采用16引脚DIP和SOP封装。
PWM可用于电流或电压模式中。在电压模式中，基于PFC输出总线的前馈可减少辅助输出的纹波。要评估 FAN4800AU 能否替换现有的 FAN4800A、FAN4800AS、旧版的 FAN4800 和 ML4800 板，必须在执行微调流程之前完成 6 项任务：
1.将RAC电阻从旧值改为更高的电阻值：6 MΩ 改为 8 MΩ。
2.将 RT/CT 引脚从现有值改为 RT= 6.8 kΩ 和 CT= 1000 pF，以具有 fPFC=64 kHz 和 fPWM= 64 kHz。
3.在线路输入介于 85 VAC至 270 VAC的通用输入应用中，当 VIN= 85 VAC时，需要将 VRMS 引脚电压设置为 1.224 V。
4.将 ISENSE 引脚滤波器从现有值改为 RFilter= 51 Ω 和 CFilter= 0.01 µF，可获得更大的带宽。
5.满载时，平均 VVEA必须为~4.5 V，并且 VVEA上的纹波必须小于 400 mV。
6.对于 SS 引脚，软启动电流已降至 FAN4800 电容的一半。

  • 台式计算机
  • LCD 电视
  • LCD监视器
  • 配电

  • 引脚对引脚兼容于 ML4800、FAN4800、CM6800 和 CM6800A
  • PWM 可针对电流模式或前馈电压模式运行配置
  • 在一个IC中具有内部同步的前沿PFC和后沿PWM
  • 低工作电流
  • 创新性开关电荷乘法器除法器
  • 平均电流模式，可实现输入电流整形
  • PFC过压和欠压保护
  • PFC反馈开环保护
  • PFC/PWM的逐周期限流保护
  • 启动时序控制和软启动
  • 线电压聚降保护
  • fRTCT= 4 x fPFC= 4 x fPWM

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FAN4800AUM

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Active

CAD Model

Pb

A

H

P

SOIC-16

751BG

3

260

REEL

2500

Y

CCM

Fixed

Current Mode

Step-Up

64

30

470 / 550

11

No

Yes

No

$0.5694

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FAN4800AUN

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CAD Model

Pb

A

H

P

PDIP-16

648-08

NA

0

TUBE

1500

Y

CCM

Fixed

Current Mode

Step-Up

64

30

470 / 550

11

No

Yes

No

$0.4948

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可靠性数据

Die Related Summary Data

Device: FAN4800AUM

Equivalent to wafer fab process: CN

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等效器件小时

平均故障间隔时间/平均无故障时间（按小时计算）

FITS

CN

6

425600109

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Note: The temperature and confidence level may be adjusted to your requirements.

Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)

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