TOP104YN

Product Summary

The TOP104YN is a three-terminal off-line PWM switch. The TOP104YN with only three pins, all functions necessary for an off-line switched mode control system: high voltage N-channel power MOSFET with controlled turn-on gate driver, voltage mode PWM controller with integrated 100 kHz oscillator, high voltage start-up bias circuit, bandgap derived reference, bias shunt regulator/error amplifier for loop compensation and fault protection circuitry. Compared to discrete MOSFET and controller or self oscillating (RCC) switching converter solutions, the TOP104YN can reduce total cost, component count, size, weight and at the same time increase efficiency and system reliability.

Parametrics

TOP104YN absolute maximum ratings: (1)DRAIN Voltage: -0.3 to 350 V; (2)CONTROL Voltage: -0.3 V to 9 V; (3)Storage Temperature: -65 to 125℃; (4)Operating Junction Temperature: -40 to 150℃; (5)Lead Temperature: 260℃; (6)Thermal Impedance (θJA): 70℃/W; (7)Thermal Impedance (θJC): 2℃/W.

Features

TOP104YN features: (1)Low Cost Replacement for Discrete Switchers, 20 to 50 fewer components - cuts cost; increases reliability, Source-connected tab and Controlled MOSFET turn-on reduce EMI and EMI filter costs; Allows for a 50% smaller and lighter solution; Cost competitive with linears above 5 W; (2)Up to 90% Efficiency in Flyback Topology, Built-in start-up and current limit reduce DC losses; Low capacitance 350 V MOSFET cuts AC losses; CMOS controller/gate driver consumes only 6 mW; 70% maximum duty cycle minimizes conduction losses; (3)Simplifies Design - Reduces Time to Market, Supported by many reference designs; Integrated PWM Controller and 350 V MOSFET in a industry standard three pin TO-220 package; Only one external capacitor needed for compensation, bypass and start-up/auto-restart functions; (4)System Level Fault Protection Features, Auto-restart and cycle by cycle current limiting functions handle both primary and secondary faults; On-chip latching thermal shutdown protects the entire system against overload; (5)Highly Versatile, Implements Buck, Boost, Flyback or Forward topology; Easily interfaces with both opto and primary feedback; Supports continuous or discontinuous mode of operation; Specified for operation down to 16 V DC input.

Diagrams