Dramatically simplifies low power CV/CC charger designs by eliminating an optocoupler and secondary control circuitry.
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Typical Application/Performance – Not a Simplified Circuit (a) and Output Characteristic Envelope (b).
Data Sheets
LinkSwitch-II 632DG Data Sheet
Energy-Efficient, Accurate CV Switcher With CC Control for Adapters and Chargers
Product Details
Description
The LinkSwitch-II dramatically simplifies low power CV/CC charger designs by eliminating an optocoupler and secondary control circuitry. The device introduces a revolutionary control technique to provide very tight output voltage and current regulation, compensating for transformer and internal parameter tolerances along with input voltage variations.
The device incorporates a 700 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/CC Converters
- Eliminates Optocoupler and all secondary CV/CC control circuitry
- Eliminates all control loop compensation circuitry
LNK632DG
- Dramatically simplifies CV converters
- Enables Clampless™ designs when an external bias circuit is used
Advanced Performance Features
- Compensates for transformer inductance tolerances
- Compensates for input line voltage variations
- Compensates for cable voltage drop (LNK61X series & LNK632)
- 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 power delivered by >95% for output short circuit and 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
EcoSmart® – Energy Efficient
- Easily meets all global energy efficiency regulations
- No-load consumption <200 mW at 230 VAC and down to below 30 mW with optional external bias
- On/Off control provides constant efficiency down to very light loads – ideal for CEC and ENERGY STAR 2.0 regulations
- No current sense resistors – maximizes efficiency
Green Package
- Halogen free and RoHS compliant package
Applications
- Chargers for cell/cordless phones, PDAs, MP3/portable audio devices, adapters
- LED drivers, etc.
Applications
Power Table
| Output Power (Watts) | ||
|---|---|---|
| PRODUCT1 |
85-265 VAC |
|
| Adapter2 | Open Frame3 | |
| LNK603PG/DG LNK613PG/DG |
2.5 | 3.3 |
| LNK604PG/DG LNK614PG/DG |
3.5 | 4.1 |
| LNK605PG/DG LNK615PG/DG |
4.5 | 5.1 |
| LNK606PG/GG/DG LNK616PG/GG/DG |
5.5 | 6.1 |
| LNK632DG | 3.1 | 3.1 |
Notes:
- Packages: D: SO-8C, G: SMD-8C, P: DIP-8C.
- Minimum continuous power in a typical non-ventilated enclosed adapter measured at +50 °C ambient, device, TJ <100 °C.
- Maximum practical continuous power in an open frame design with adequate heatsinking, measured at 50 °C ambient.
Product Documents
Design Examples
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