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Description
The UC1844AY is a control IC that belongs to the UC184xA family of ICs. It is designed to implement off-line fixed-frequency, current-mode switching power supplies with minimal external components. This control IC offers improved load regulation, pulse-by-pulse current limiting, and inherent protection for the power supply's output switch. It features a bandgap reference with ±1% accuracy, an error amplifier, a current sense comparator with internal clamp, a high-current totem pole output stage for fast switching of power MOSFETs, and an externally programmable oscillator for frequency and maximum duty cycle settings. The undervoltage lock-out is designed for efficient bootstrap supply voltage design with a start-up current of 250µA typ.
Specifications and features
• Low start-up current (0.5mA max)
• Trimmed oscillator discharge current
• Optimized for off-line and DC-to-DC converters
• Automatic feed forward compensation
• Pulse-by-pulse current limiting
• Enhanced load response characteristics
• Under-voltage lockout with hysteresis
• Double pulse suppression
• High-current totem pole output
• Internally trimmed bandgap reference
• 500KHz operation
• Low RO error amplifierApplication Scenarios
• Economical off-line flyback or forward converters
• DC-DC buck or boost converters
• Low-cost DC motor control -
Similar parts: 430483 , Click to view
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Datasheet
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Shopping guide
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Popular parts of the same kind
- Datasheet: Download UC1844AY
- Chipdatas Part: CD91-UC1844AY
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/10/02 14:20 +0800
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- Full or Partial Refund , If the item is not as described
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