MT79338

Features

MT79338 is a single-stage, high power factor (PF), primary-side controlled AC-to-DC LED driver chip. MT79338 integrates on-chip PF function, works in critical conduction mode, achieves high power factor and reduces MOSFET power switch loss. Utilizing MAXIC's unique control technology (patent applied for), LED current can be accurately controlled without secondary-side sensing devices such as optocouplers.

MT79338 has a built-in 600V high-voltage power tube, which simplifies the peripheral circuit.

MT79338 also implements various protection functions, including over-current protection (OCP), over-voltage protection (OVP), short-circuit protection (SCP) and over-temperature protection (OTP), to ensure reliable operation of the system.

Parameters

. Single-stage active PFC achieves high power factor and low THD

. Primary side sensing mechanism, no optocoupler required

. High precision LED current (+/-3%)

. Critical Conduction Mode Operation

. Cycle-by-cycle peak current control

. Built-in undervoltage lockout protection

. VDD overvoltage protection, output overvoltage protection

. Adjustable constant current output current and output power

. With soft start function

. Built-in 600V power MOSFET

. DIP8 package

Description: Built-in 600V MOS

Vin(V):85～264VAC

Maximum driving capability: 24W

Power factor: >0.9

Dimming method: N/A

Application

Bulb lamp, ceiling lamp, PAR lamp