DK124 -24W off-line switching power supply 1
Functional description
DK124 is an off-line switching power supply chip, the maximum output power of 24W. Different from the PWM controller and external
Discrete power MOS combination of solutions, DK124 internal integrated PWM controller, 700V power transistor and primary peak
Current detection circuit, and the use of the auxiliary power supply can be omitted from the patented self-powered technology, which greatly simplifies the
Peripheral application circuit reduces the number of originals, circuit size and weight, especially for cost-sensitive flyback switches
power supply.
Features
L Full voltage input 85V-265V
Built-in 700V high voltage power tube
L internal integrated high-voltage start circuit, no external start resistor
Built-in 16mS soft-start circuit
Built-in high and low voltage power compensation circuit, so that the maximum high and low voltage output power consistent
L patented self-powered technology, no external auxiliary winding power supply
Built-in frequency modulation circuit, simplifying the external EMI design costs
L Full overvoltage, overtemperature, overcurrent, overload, output open / short circuit protection
Application areas
L DVD, VCR, STB power supply
L adapter, charger power supply
L LED power supply
Power range
Input voltage 85-165V 185-265V 85-265V
Maximum output power 24W 24W 18W

Functional Description DK124 is an off-line switching power supply chip, the maximum output power of 24W. Unlike the PWM controller and the external discrete power MOS combination solution, the DK124 integrates a PWM controller, a 700V power transistor and a primary peak current detection circuit, and uses a patented self-powered technology that can omit the auxiliary supply winding, Simplifies peripheral applications, reduces the number of originals, circuit size and weight, especially for cost-sensitive flyback switching power supplies.