LNK3209GQ
Highly Energy Efficient Switcher IC for Automotive Use with Integrated System Level Protection for Low Component-Count Power Supplies
Product Details
The LinkSwitch™-TN2 family of ICs for automotive power supplies provide significant reduction in component count compared to traditional discrete solutions making it highly reliable. 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 30 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
Specifications
| Power - Output (Max, VDC) | 10.00 W |
| Current - Output (Max, CCM, Univ) | 850.00 mA |
| Switching Frequency (max) | 74 kHz |
| Breakdown Voltage | 750 V |
| Voltage - Output (Max) | 24.00 V |
| Voltage Input (Max, DC) | 550.00V |
| Voltage Input (Min, DC) | 30.00V |
| Auto-Restart & Overvoltage Response | Latch Off |
| IC Package | SMD-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 |
Frequency Jittering
Soft Start
Auto-Restart/Latching Fault Response
On/Off Control
Selectable Current Limit
|
| Protection Features |
Input Overvoltage
Input Undervoltage
Output Open Loop
Output Overload
Output Overvoltage
Output Short Circuit
Overtemperature
|
| Output Profile | CV |
| Topology |
Buck
Buck-Boost
Flyback
|
| Product Sub-Type | PMIC |
| MSL Rating | 3 |
| Secondary Response | Auto-restart |
| Voltage - Output (Reflected) | 15.00 V |
