www.st.com/vipower

Thanks to the MDmesh MOSFET with a breakdown

typical handling output power of 40W for a 85 to

265Vac voltage mains. For this level of power the

device does not require a 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.

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.

designing the transformer. In fact in secondary

to 18V, while in the VIPer53 it goes from 9V to 14.5V

and this wide voltage range can follow fast load

eliminating an internal error amplifier.

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.

VIPer53EDIP

VIPer53ESP

195-265Vac

30W

40W

85-265Vac

Input Mains

P / N

50W

65W

VIPer53E general block diagram

overtemp

detector

oscillator

R1

150/400ns

blanking

VIPer53E

R2

R3

S

FF

R4

Q

R5

8.4/

11.5V

18V

0.5V

4.35V

4V

1V

8V

125k

ON/OFF

OSC

DRAIN

SOURCE

COMP

TOVL

UVLO

comparator

overvoltage

comparator

overload

comparator

standby

comparator

PWM

Latch

PWM

comparator

current

amplifier

4.5V

0.5V

blanking time

selection

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.