LNK574DG
Zero No-Load Consumption Integrated Off-Line Switcher IC
Product Details
Description
LinkZero-LP, an upgrade to PI's popular LinkSwitch-LP, incorporates new technology which enables the device to automatically enter into and wake up from no-load mode while disipating less than 5 mW - substantially less than the IEC definition of zero no-load power consumption. The tightly specified FEEDBACK pin voltage reference enables universal input primary side regulated power supplies with accurate constant voltage from 5% to full load. Start-up and operating power are derived directly from the DRAIN pin which eliminates start-up circuitry. The internal oscillator frequency is jittered to significantly reduce both quasi-peak and average EMI, minimizing filter cost.
Product Highlights
Lowest System Cost with Zero No-Load
- Automatically enters zero input power mode when load is disconnected
- Simple upgrade to existing LinkSwitch-LP designs
- Very tight IC parameter tolerances improve system manufacturing yield
- Suitable for low-cost clampless designs
- Frequency jittering greatly reduces EMI filter cost
- Extended package creepage improves system field reliability
Advanced Protection/Safety Features
- Accurate hysteretic thermal shutdown protection – automatic recovery reduces field returns
- Universal input range allows worldwide operation
- Auto-restart reduces delivered power by >85% during short-circuit and open loop fault conditions
- Simple ON/OFF control, no loop compensation needed
- High bandwidth provides excellent transient load response with no overshoot
EcoSmart – Energy Efficient
- No-load consumption as low as 4 mW at 230 VAC input*
- Easily meets all global energy efficiency regulations with no added components
- ON/OFF control provides constant efficiency to very light loads
Applications
- Chargers for cell/cordless phones, PDAs, power tools, MP3/portable audio devices, shavers, etc.
* IEC 62301 Clause 4.5 rounds standby power use below 5 mW to zero.
Specifications
| Output Power (Max) - Open Frame, 230V | 3.00 W |
| Output Power (Max) - Enclosed, 230V | 3.00 W |
| Output Power (Max) - Enclosed, Univ | 3.00 W |
| Output Power (Max) - Open Frame, Univ | 3.00 W |
| Breakdown Voltage | 700 V |
| Voltage - Input (Min) | 85 V |
| Voltage - Input (Max) | 265 V |
| Auto-Restart & Overvoltage Response | Latch Off |
| Cable Drop Compensation | X |
| IC Package | SO-8C |
| Internal Switch | Yes |
| Mounting Type | Surface Mount |
| Over-Temperature Response | Hysteretic |
| Temperature - Operating (Min) | -40 °C |
| Temperature - Operating (Max) | 150 °C |
| Control Scheme | Primary-side |
| Control Features |
Cable Drop Compensation
Frequency Jittering
Auto-Restart/Latching Fault Response
On/Off Control
|
| Protection Features |
Output Undervoltage
Overtemperature
Input Overvoltage
Input Undervoltage
Output Overvoltage
Output Short Circuit
Output Open Loop
|
| Output Profile | CV/CC |
| Topology | Flyback |
| Product Sub-Type | PMIC |
| Secondary Response | Auto-restart |
