Description

The TOP209/210 implements 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 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, a TOPSwitch integrated circuit can reduce total cost, component count, size, weight and at the same time increase efficiency and system reliability. The TOP209/210 are intended for 100/110/230 VAC off-line Power Supply applications in the 0 to 8 W (0 to 5 W universal) range.

Product Highlights

Cost Effective Switcher for Low Power Applications

• Replaces linear power supplies

• Replaces discrete switcher and 20 to 50 components

– cuts cost, increases reliability

• Stand-by power supplies for Green or energy efficient

products such as personal computers, monitors, UPS,

copiers, fax machines, etc.

• Housekeeping or keep-alive power supply applications

such as TV, appliances, industrial control and personal

computers

• Meets Blue Angel low power stand-by specification

• Controlled MOSFET turn-on reduces EMI and EMI filter

costs

• 80 smaller and lighter compared to linear supply

• 50 smaller compared to discrete switcher

Over 80 Efficiency in Flyback Topology

• Built-in start-up and current limit reduce DC losses

• Low capacitance 700 V MOSFET cuts AC losses

• CMOS controller/gate driver consumes only 6 mW

• 70 maximum duty cycle minimizes conduction losses

Simplifies Design – Reduces Time to Market

• Supported by reference design boards

• Integrated PWM Controller and 700 V MOSFET in

industry standard eight pin DIP package

• Only one external capacitor needed for compensation,

bypass and start-up/auto-restart functions

• Easily interfaces with both opto and primary feedback

System Level Fault Protection Features

• Auto-restart and cycle by cycle current limiting functions

handle both primary and secondary faults

• On-chip thermal shutdown with hysteresis protects the

entire system against overload