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Description
The UCC38531N is a current-mode Pulse Width Modulated (PWM) controller designed for use in off-line, flyback, or forward converters. It features a low start-up supply current, accurate fixed frequency oscillator, internal slope compensation, built-in over-voltage and under-voltage detection, high-speed over-current trip, and more.
Specifications and features
- Very low start-up supply current; 50 µA typical
- Low operating supply current; 1.2 mA typical
- Accurate, internally-trimmed, fixed frequency oscillator (100 kHz). No external timing components needed
- Internal slope compensation. No external ramp components needed
- Built-in over-voltage and under-voltage detection
- High-speed over-current trip; 170 ns typical
- Over-voltage clamp on supply voltage (VDD)
- Internal divider regulates VDD to 12 V. No external divider needed
- Leading edge blanking of the current sense signal
- Control frequency modulated over a narrow band to reduce Electromagnetic Interference (EMI)
- High output drive capability; 150 ns typical rise and fall time into 2 nF load
- Wide bandwidth (10 MHz) error amplifier with external compensation pin and simple interface to optocoupler
- Accurate internal bandgap reference
Application Scenarios
The UCC38531N is commonly used in off-line switched mode power supplies, laptop computer mains adaptors, and printer power supplies.
Comparison
Advantages:- Low start-up supply current
- Accurate fixed frequency oscillator
- High-speed over-current trip
- Wide bandwidth error amplifier
- Accurate internal bandgap reference
Disadvantages:No specific disadvantages have been reported for the UCC38531N.
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Datasheet
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Shopping guide
Delivery period:
- - Will ship out in 2-3 days
- - DHL Express: 3-7 business days
- - DHL eCommerce: 12-22 business days
- - FedEx International Priority: 3-7 business days
- - EMS: 10-15 business days
Shipping fee:
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Shipping option:
DHL, FedEx, EMS, SF Express, and Registered Air MailShipping tracking:
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How to Buy:
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- - Inquiry, Add to inquiry sheet/Submit bom/inquire file/Send email us > Quote > Place order > Complete payment >Delivery.
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Payment:
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Additional Information
- Datasheet: Download UCC38531N
- Chipdatas Part: CD94-UCC38531N
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/05/21 01:27 +0800
Refund
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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Payment Method
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Western Union charge US$0.00 banking fee.
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