文件名称:
镍氢、镍镉充电控制专用IC MC33340-D资料
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上传时间: 2008-05-03
详细说明： 镍氢、镍镉充电控制专用IC MC33340-D资料
The MC33340 and MC33342 are monolithic control IC’s that are
specifically designed as fast charge controllers for Nickel Cadmium
(NiCd) and Nickel Metal Hydride (NiMH) batteries. These devices
feature negative slope voltage detection as the primary means for fast
charge termination. Accurate detection is ensured by an output that
momentarily interrupts the charge current for precise voltage
sampling. An additional secondary backup terminatio n method can be
selected that consists of either a programmable time or temperature
limit. Protective features include battery over and undervoltage
detection, latched over temperature detection, and power supply input
undervoltage lockout with hysteresis. Fast charge holdoff time is the
only difference between the MC33340 and the MC33342. The
MC33340 has a typical holdoff time of 177 seconds and the MC33342
has a typical holdoff time of 708 seconds.
• Negative Slope Voltage Detection with 4.0 mV Sensitivity
• Accurate Zero Current Battery Voltage Sensing
• High Noise Immunity with Synchronous VFC/Logic
• Programmable 1 to 4 Hour Fast Charge Time Limit
• Programmable Over/Under Temperature Detection
• Battery Over and Undervoltage Fast Charge Protection
• Power Supply Input Undervoltage Lockout with Hysteresis
• Operating Voltage Range of 3.25 V to 18 V
• 177 seconds Fast Change Hold–off Time (MC33340)
• 708 seconds Fast Change Hold–off Time (MC33342) ...展开收缩
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