Highly Energy Efficient Switcher IC for Automotive Use with Integrated System Level Protection for Low Component-Count Power Supplies
Data Sheets
LinkSwitch-TN2Q Data Sheet(New!)
Product Details
The LinkSwitch™-TN2 family of ICs for automotive power supplies provide significant reduction in component count compared to traditional discrete solutions. Flyback designs using the integrated LinkSwitch-TN2 ICs in primary-side control configurations are highly reliable without the use of opto isolators. The device family supports buck, buck-boost and flyback converter topologies. Each device incorporates a 750 V power MOSFET, oscillator, On/Off control, a high-voltage switched current source for self-biasing, frequency jittering, fast (cycle-by-cycle) current limit, hysteretic thermal shutdown, and output and overvoltage protection circuitry onto a monolithic IC.
LinkSwitch-TN2 ICs consume very little current in standby resulting in power supply designs that meet <50 mW no-load input at 400 VDC input. A full suite of protection features enable safe and reliable power supplies protecting the device and the system against input and output overvoltage faults, device over-temperature faults, lost regulation, and power supply output overload or short-circuit faults.
Product Highlights
Highest Performance and Design Flexibility
- AEC-Q100 qualified
- Supports buck, buck-boost and flyback topologies
- Wide input voltage 60 VDC to 550 VDC
- Excellent load and line regulation
- 66 kHz operation with accurate current limit
- Allows the use of low-cost off-the-shelf inductors
- Reduces size and cost of magnetics and output capacitor - Frequency jittering reduces EMI filter complexity
- Pin-out simplifies PCB heat sinking
- Fab and assembly are IATF16949 certified
Enhanced Safety and Reliability Features
- Auto-restart for short-circuit and open loop faults
- Output overvoltage protection (OVP)
- Hysteretic over-temperature protection (OTP)
- Extended creepage between DRAIN pin and all other pins improves field reliability
- 750 V MOSFET rating for excellent surge withstand
EcoSmart™– Extremely Energy Efficient
- Standby supply current <100 μA
- On/Off control provides constant efficiency over a wide load range
- Easily meets all global energy efficiency regulations
- No-load consumption <50 mW
Applications
Power Table
| Output Current Table1 | ||||
|---|---|---|---|---|
| Product2 | 60 to 550 VDC | |||
| LNK3206GQ | 360 mA | |||
Notes:
- Typical output current in a non-isolated buck converter with devices operating
at default current limit and adequate heat sinking. Output power capability
depends on respective output voltage and thermal requirements. - Package: G: SMD-8C
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