DK124 Power Management 5V 50mA IC DIP-8

Description

DK124 Power Management 5V 50mA IC DIP-8 The DK124 IC is specially design for off-line switch mode power supply, maximum power is 24W. Different from PWM controller and external power separated MOS combination design, the PWM controller, 700V power transistor, and high voltage starting circuit are integrated into his DK124 IC. So that to save external circuit, component use and cost. Also size and weight of the product is reduced. It is specially suitable for price sensitive flyback switch mode power supply Features: 85V—265V wide range AC power input. Build-in 700V power transistor. Internal integrated high voltage starting circuit, no need for additional resistance. Internal 16mS soft-start circuit. Internal power compensation circuit to keep the stability of max. output power in both high and low voltage. Patent dynamic self-power supply, no need for auxiliary winding. Internal frequency modulation circuit to reduce EMI filter cost. Over current, Over loading, Over temperature, Over voltage and Short circuit Protection. Specifications: Parameter Condition Min. Typ. Max. Unit Vcc (Work Power Supply) AC input: 85V-265V 4.65 4.95 5.25 V Start threshold Voltage AC input: 85V-265V 4.75 5.05 5.35 V Restart Voltage AC input: 85V-265V 3.3 3.6 3.9 V Protect Voltage of VCC AC input: 85V-265V 6.25 6.55 6.85 V Current of Vcc Vcc=5V, Fb=1.5V 50 mA High voltage start current AC input: 85V-265V 0.3 0.6 1.2 mA Start time AC input: 85V — — 500 mS BJT Vcc Breakdown voltage Ioc=1mA 700 — — V Collector Protection Voltage Check OC voltage 540 600 660 V Peak Current Protection Vcc=5V, Fb=1.5V—2.8V 1100 1300 1500 mA PWM Output frequency Vcc=5V, Fb=1.5V—2.5V 61 65 69 kHz Vcc=5V, Fb=2.5V—2.8V 20 22 24 kHz Stepped Frequency Vcc=5V, Fb=1.5V—2.5V 0.5 kHz Short circuit protection threshold Tested FB voltage 1.15 1.33 1.50 V Frequency conversion threshold voltage Tested FB voltage 2.3 2.7 2.7 V Burst mode threshold Tested FB voltage 2.6 2.8 3.0 V Temperature protection (junction temperature) — 120 130 140 °C Leading edge blanking time Vcc=5V, Fb=1.5V—2.5V 250 nS Min. turn-on time Vcc=5V, Fb=2.6V 500 nS Duty cycle of PWM Vcc=5V, Fb=1.5V—2.5V 5 — 70 % Standby power loss AC input: 265V, unloaded 240 mW Pinout: Application: Battery charger DVD/VCD/VCR power supply Power AC/DC adapters Air conditioner power supply STB power supply LED driver applications Electromagnetic oven power supply TV/Monitor power supply Package Include: 1x DK1-24 Power Management IC 24W DIP-8. Datasheet: DK124 .

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