UC3843BNG ONSEMI
信息编号:1484913 浏览:120次- 供应商
- 苏州吉远电子科技有限公司 商铺
- 认证
- 报价
- 人民币¥2.00元每PCS
- 品牌
- ONSEMI
- 型号
- UC3843BNG
- 封装
- PDIP-8
- 所在地
- 苏州工业园区娄葑镇星红路199号A座418室
- 联系电话
- 62373510
- 手机号
- 13584856998
- 联系人
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产品详细介绍
品牌 | ON SEMI | 型号 | UC3843BNG |
封装 | PDIP-8 | 批号 | 1055 |
类型 | 其他IC |
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 in an 8−pin dual−in−line and
surface
mount (soic−8) plastic package as well as the 14−pin plastic
surface
mount (soic−14). the soic−14 package has separate power and
ground pins for the totem pole output stage.
the ucx842b has uvlo thresholds of 16 v (on) and 10 v (off),
ideally suited for off−line converters. the ucx843b is tailored
for
lower voltage applications having uvlo thresholds of 8.5 v (on)
and
7.6 v (off).
features
• trimmed oscillator for precise frequency control
• oscillator frequency guaranteed at 250 khz
• current mode operation to 500 khz
• automatic feed forward compensation
• latching pwm for cycle−by−cycle current limiting
• internally trimmed reference with undervoltage lockout
• high current totem pole output
• undervoltage lockout with hysteresis
• low startup and operating current
• this is a pb−free and halide−free device
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