THX202H Switching Power Controller IC

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Штрих Код




PWM controller of high-performance
current mode is specially designed for
AC/DC transformer with high performance
and price ratio, which supplies continuous
output power of 5W within the range of
wide-voltage between 85V and 265V, the
output power of peak value can be up to
18W. The combination of optimized
reasonable circuit design and bipolar
facture technology with high performance
and price ratio economizes the whole cost
ultimately. The power controller can be
applied to the typical flyback circuit
topology so as to form a simple AC/DC
transformer. The startup circuit inside IC
is designed as a particular current
inhalation way, so it can start up with the
magnification function of the power switch
tube itself, which lessens the power
consumption for starting the resistance
remarkably; when the output power is
lower, IC will reduce the working
frequency automatically, therefore, the
standby power consumption becomes
extremely low. When the power tube is
closed, the interior circuit will bias it
reversely, utilize the characteristic of high
pressure resistance CB of bipolar transistor
directly, and improve its pressure resistance
capacity to the high voltage of 700V, which
ensures the security of the power tube.
Meanwhile, the perfect function of
overload and saturation prevention is
provided inside of IC, which can keep
away some abnormal status, such as
overload, saturation of transformer, and
output short circuit, so as to improve the
reliability of the power supply. Besides,
there is a 2.5V voltage reference integrated
inside IC for providing precise voltage to
the clock circuit, and clock frequency can
be set up by an exterior timing capacity.
Now the standard encapsulation and
the environmental protection leadless
encapsulation that meets European
standard of DIP8 are supplied.

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