Product introduction:

The FT844xxx is a high performance, high precision, low cost non-isolated buck power switch. It contains a current-mode PWM controller and a high-voltage power MOS. The built-in error amplifier is optimized to ensure superior dynamic response. Highly accurate internal partial voltage resistors and reference voltages, as well as closed-loop feedback enable the FT844xxx to obtain stable, high-precision output voltages over the full voltage input range.

The FT844xxx uses an ultra-high voltage process with integrated internal high-voltage start-up circuitry, high-voltage power switches, and current sampling resistors, reducing external components and greatly simplifying system applications. Built-in frequency jitter and soft driver design can effectively improve EMI performance.

The FT844xxx internally integrated functions also include: VCC under voltage protection (UVLO), VCC overvoltage protection (OVP), over temperature protection (OTP), cycle-by-cycle over current protection (OCP), and output short circuit protection (SCP). The complete protection functions ensure the reliability of the system.

Product characteristics:

Integrated 650V high voltage start-up circuit and high voltage power switch, Fast start-up: 50mS

Built-in frequency jittering technology to improve EMI performance

Low cost Buck、Buck-boost、Flyback solution, minimal external BOM

Built-in under-voltage, over-voltage, over-current, over-temperature, and short-circuit protection

Low static power consumption

Fixed output: 50mW

Output adjustable mode: 100mW

FT8440xx output voltage set via FB pin:

FB floating: 12V

FB short to GND: 18V

FB connected to voltage divider resistor: continuously adjustable (5~18V)

FT8441xx output voltage is 5V

FT8443xx output voltage is 18V

FT8441xp: Built-in flyback diode and VCC diode, streamline peripheral design

Package: SOP8, DIP7