STMicroelectronics - High Voltage Converters - VIPer53E State-Of-The-Art Primary Side Switch For AC/DC Converters

The new VIPer53E includes a PWM driver, an MDmesh MOSFET, a start-up high voltage current source and several on chip protection circuits. The VIPer53E is an alternative choice to the VIPer53 when only the secondary regulation is required in a power supply. Like the standard VIPer53, the new version is housed in surface mounting DIP-8 and PowerSO-10 packages.

Extending The Device Supply Voltage

The higher V_DD voltage range brings flexibility in designing the transformer. In fact in secondary regulation VIPer53E V_DD voltage goes from 9V to 18V, while in the VIPer53 it goes extends from 9V to 14.5V and this wide voltage range can follow fast load variations. The extended V_DD is implemented by eliminating an internal error amplifier.

Why Use the VIPer53E?

Thanks to the MDmesh MOSFET with a breakdown voltage of 620V, an R_DS(on) of 1Ohm at 25°C and a typical handling output power of 40W for a 85 to 265Vac voltage mains. For this level of power the device does not require any heat-sink. The total power consumption of the converter is less than 0.5W for the system when working in stand-by mode. This means power supply designers can easily meet the Blue Angel Eco or Energy Star Program.

P / N	Input Mains
P / N	195-265Vac	85-265Vac
VIPer53EDIP	50W	30W
VIPer53ESP	65W	40W

Applications

Although the main application of VIPer53E is in AC/DC converters for consumer equipment such as set-top boxes, DVDs, VCRs, it can also be used for stand-by power supplies for servers or in home appliances where a very efficient AC/DC power supply in buck topology is needed.

Features

	Automatic burst mode for very low consumption in stand-by conditions (less than 500mW);
	Integrated high voltage start-up current source;
	Overload and short circuit control;
	Over-voltage protection at 18V;
	Over-temperature shutdown;
	Under-voltage protection;
	Current mode control with adjustable drain current limitation;
	Externally set switching frequency, up to 300kHz.

VIPer53E general block diagram



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