GENERAL DESCRIPTION

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 12W within the range of wide-voltage

between 85V and 265V, the output power of peak value

can be up to 15W. 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 fly-back circuit topology so as to form a

simple AC/DC transformer. 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 800V, 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. The current

limit and clock frequency can be set up by exterior

components. .

Now the standard encapsulation and the environmental

protection leadless encapsulation that meets European

standard of DIP8 are supplied .

FEATURES

Set-in high-voltage power switch tube of 800V and few

peripheral components. .

With the modulation of lock pulse width, the testing is

according to the pulse limit current. .

With the function of output frequency reduction, the nonoutput power consumption can be less than 0.3W.

Inner-built ramp and anti-feedback compensation

function. .

The independent upper-limit current testing controller

deals with over-current and over-load of the controller realtimely. .

The period emission pole is turned off and it outputs by

deflected voltage, and the pressure resistance of the power

tube is improved. .

Set-in current limit resistance with temperature.

compensation, which makes the current limit precise.

Set-in heat protection circuit. .

Startup is accomplished with the magnification function

of the switch power tube, and the power consumption of

startup resistance is reduced more than10 times.

Few peripheral components. .

Low startup and operating current. .

VCC over-voltage automatic limit. .

Continuous wide-voltage output power reaches 12W,

and the output power of peak value arrives at 15W.

Compatible with THX203/RM6203 .

APPLICATIONS

Adaptor (for example, travel charger, out

power station) .

Open Frame (such as electromagnetic oven,

microwave oven and etc.)