●The TNY278PN is a TinySwitch-III energy-efficient, off-line Switcher with enhanced flexibility and extended power range, incorporates a 700V power MOSFET, oscillator, high voltage switched current source, current limit (user selectable) and thermal shutdown circuitry. The IC family uses an ON/OFF control scheme and offers a design flexible solution with a low system cost and extended power capability.
● Simple ON/OFF Control, No Loop Compensation Needed
● Selectable Current Limit Through BP/M Capacitor Value
● Higher Current Limit Extends Peak Power or, in Open Frame Applications, Maximum Continuous Power
● Lower-current Limit Improves Efficiency In Enclosed Adapters/Chargers
● Allows Optimum TinySwitch-III Choice by Swapping Devices with No Other Circuit Redesign
● Tight I²f Parameter Tolerance Reduces System Cost
● Maximizes MOSFET and Magnetic Power Delivery
● Minimizes Max Overload Power, Reducing Cost of Transformer, Primary Clamp and Secondary Components
● ON-time Extension, Extends Low Line Regulation Range/Hold-up Time to Reduce Input Bulk Capacitance
● Self-biased - No Bias Winding or Bias Components
● Frequency Jittering Reduces EMI Filter Costs
● Pin-out Simplifies Heatsinking to PCB
● SOURCE Pins are Electrically Quiet for Low EMI
● Enhanced Safety and Reliability
● Accurate hysteretic thermal shutdown protection with automatic recovery
● Improved Auto-restart Delivers <3% of Maximum Power in Short-circuit and Open Loop Fault Conditions
● Output Overvoltage Shutdown with Optional Zener
● Line Undervoltage Detect Threshold Set Using a Single Optional Resistor
● Very Low Component Count Enhances Reliability and Enables Single-sided Printed Circuit Board Layout
● High Bandwidth Provides Fast Turn On with No Overshoot and Excellent Transient Load Response
●Maximum ratings specified may be applied, one at a time, without causing permanent damage to the product.
