Controllers | KA3844B

最高 500 kHz 的 PWM 控制器可编程频率

Obsolete

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概览

KA3842B/KA3843B/KA3844B/KA3845B是固定频率电流模式PWM控制器。它们专门设计用于外部组件最少的离线和DC-DC转换器应用。这些集成电路带有用于精确占空比控制的微调振荡器、温度补偿参考、高增益误差放大器、电流感应比较器和非常适合用于驱动功率MOSFET的高电流图腾柱输出。KA3842B和KA3844B具有的欠压闭锁(UVLO)阈值为16V（开）和10V（关），KA3843B和KA3845B为8.5V（开）和7.9V（关），KA3842B和KA3843B可在100%占空比范围内进行操作。KA3844B和KA3845B可使用50%的占空比进行操作。

  • 其他消费型电子

  • 低启动电流
  • 最大占空箝位
  • 带滞后的UVLO
  • 工作频率高达500KHz

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KA3844B

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CAD Model

Pb

A

H

P

PDIP-8

626-05

NA

0

TUBE

3000

N

Flyback

-

Current Mode

14.5

17.5

52

Price N/A

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可靠性数据

Die Related Summary Data

Device: KA3844B

Equivalent to wafer fab process: 9

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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

9

0

314834549

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Data is based on the following assumptions.

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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