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.