UCC35702DTR - Brand New Texas Instruments DC DC Switching Controllers
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Description
The UCC35702DTR is a current-mode Pulse Width Modulated (PWM) controller designed for implementing off-line, flyback, or forward converters with a minimal number of external components. It features a very low start-up supply current and low operating supply current. The controller has an accurate internally-trimmed fixed frequency oscillator and internal slope compensation, eliminating the need for external timing and ramp components. It also incorporates built-in over-voltage and under-voltage detection, as well as a high-speed over-current trip. The UCC35702DTR is capable of driving high output loads and has a wide bandwidth error amplifier with an external compensation pin for simple interface to an optocoupler. It is commonly used in off-line switched mode power supplies, laptop computer mains adaptors, and printer power supplies.
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
- Off-line switched mode power supplies
- Laptop computer mains adaptors
- Printer power supplies
Comparison
The UCC35702DTR offers numerous advantages including a low start-up supply current, accurate internal frequency oscillator, built-in over-voltage and under-voltage detection, high-speed over-current trip, and a wide bandwidth error amplifier. It eliminates the need for many external components and offers precise and reliable performance in various applications.
However, it is important to note that the UCC35702DTR may not be suitable for all applications. Some potential disadvantages include its specific voltage regulation and the need for an external optocoupler for error compensation. Additionally, it may not be the most cost-effective option for certain projects.
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Datasheet
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Popular parts of the same kind
- Datasheet: Download UCC35702DTR
- Chipdatas Part: CD94-UCC35702DTR
- Warehouse: China, Hong Kong
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- Last Updated: 2024/05/20 22:13 +0800
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