LinkSwitch-XT2

Energy Efficient, Low Power Off-Line Switcher IC With Integrated System Level Protection

Figure 1. Typical Application with LinkSwitch-XT2.

Energy Efficient, Low Power Off-Line Switcher IC With Integrated System Level Protection

Data Sheets

LinkSwitch-XT2 Data Sheet

Energy Efficient, Low Power Off-Line Switcher IC With Integrated System Level Protection

(1.97 MB)

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LinkSwitch™-XT2 incorporates a 725 V / 900 V power MOSFET, oscillator, simple ON/OFF control scheme, a high-voltage switched current source, frequency jittering, cycle-by-cycle current limit and thermal shutdown circuitry onto a monolithic IC. The start-up and operating power are derived directly from the DRAIN pin, eliminating the need for a bias winding and associated circuitry.

Product Highlights

Easy to Design

Lowest component count switcher solution
Selectable device current limit
Fully integrated auto-restart for short-circuit and open-loop protection
Optional self-biased supply
Frequency jittering greatly reduces EMI
Meets HV creepage requirements between DRAIN and all other pins both on the PCB and at the package
Pin-out simplifies PCB heat sinking

Features Superior to Linear/RCC

Output overvoltage protection (OVP)
Input overvoltage line protection (OVL)
Hysteretic over-temperature protection (OTP)
Extended creepage between DRAIN pin and all other pins improves field reliability
725 V MOSFET rating for excellent surge withstand
900 V MOSFET rating series for industrial design or extra safety margin
Extremely low component count enhances reliability
- Allows single-sided PCB and full SMD manufacturability

EcoSmart™– Extremely Energy Efficient

Easily meets all global energy efficiency regulations
No-load consumption <100 mW without bias winding at 265 VAC input (<10 mW with bias winding)
ON/OFF control provides constant efficiency to very light loads –ideal for mandatory CEC regulations

Applications

Power Table

Output Power Table⁴	Peak or Open Frame^1,2
PRODUCT³	725 V MOSFET
PRODUCT³	230 VAC ±15%	85-265 VAC
LNK3604P/G/D	9.2 W	6.1 W
PRODUCT³	900 V MOSFET
PRODUCT³	230 VAC ±15%	85-265 VAC
LNK3694P/G	6 W	4 W
LNK3696P/G	11 W	8 W

Notes:

Maximum 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 heat sinking, measured at 50 °C ambient.
Packages: P: DIP-8C, G: SMD-8C, D: SO-8C. Please see Part Ordering Information.
See Key Application Considerations section for complete description of assumptions.