Dramatically simplifies low power power supply designs by eliminating an optocoupler and secondary control circuitry.
Typical Application/Performance – Not a Simplified Circuit (a) and Output Characteristic Envelope (b).
Data Sheets
LinkSwitch-CV Data Sheet
Energy-Efficient, Off-line Switcher with Accurate Primary-side Constant-Voltage (CV) Control
ECAD Models
Product Details
Description
The LinkSwitch-CV dramatically simplifies CV power supply design with tight CV requirements and by eliminating an optocoupler and secondary control circuitry. The device introduces a revolutionary control technique to provide very tight output voltage regulation, along with input voltage variations and temperature.
The device incorporates a 725 V power MOSFET, a novel On/Off control state machine, a high voltage switched current source for self biasing, frequency jittering, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry onto a monolithic IC.
Product Highlights
Dramatically Simplifies CV Converters
- Eliminates optocoupler and all secondary CV control circuitry
- Eliminates bias winding supply – IC is self biasing
Advanced Performance Features
- Compensates for external component temperature variations
- Very tight IC parameter tolerances using proprietary trimming technology
- Frequency jittering greatly reduces EMI filter cost
- Even tighter output tolerances achievable with external resistor selection/trimming
Advanced Protection/Safety Features
- Auto-restart protection reduces delivered power by <95% for output short circuit and all control loop faults (open and shorted components)
- Hysteretic thermal shutdown – automatic recovery reduces power supply returns from the field
- Meets HV creepage requirements between Drain and all other pins, both on the PCB and at the package
- 725 V power MOSFET
Applications
- DVD/STB
- Adapters
- Standby and auxiliary supplies
- Home appliances, white goods and consumer electronics
- Industrial controls
Applications
Power Table
| Output Power (Watts) | ||||
|---|---|---|---|---|
| PRODUCT3 | 230 VAC ±15 |
85-265 VAC |
||
| Adapter1 | Open Frame2 | Adapter1 | Open Frame2 | |
| LNK623PG/DG | 6.5 | 9 | 5 | 6 |
| LNK624PG/DG | 7 | 11 | 5.5 | 6.5 |
| LNK625PG/DG | 8 | 13.5 | 6.5 | 8 |
| LNK626PG/DG | 10.5 | 17 | 8.5 | 10 |
Notes:
- Minimum continuous power in a typical non-ventilated enclosed adapter measured at +50 °C ambient .
- Maximum practical continuous power in an open frame design with adequate heatsinking, measured at 50 °C ambient.
- Packages: D: SO-8C, P: DIP-8C.
Product Documents
Design Examples
Product Image
