Tdk Corporation · TSE:6762
Tdk — Technical Presentation (September 2019)
14 slides from Tdk's technical presentation, September 2019
Slide 1: PTC Inrush Current Limiters
PTC Inrush Current Limiters Self-Protecting PTC Resistors TDK Electronics AG Piezo and Protection Devices Business Group Product Marketing PTC Munich, Germany September 2019
Slide 2: Production plants
Production plants Šumperk, Czech Republic Front-end, back-end ● Pressing, ● Sintering ● Metalization Deutschlandsberg, Austria Powder ● Powder production Zhuhai, China Back-end Kutina, Croatia ● Soldering Final measurement ● Assembly ● Final testing ● Final testing ● Package ● Package © TDK Electron
Slide 3: PTC product spectrum
PTC product spectrum Heating Overload Motor start PTC ICL Sensors elements Parameters Parameters Parameters Parameters Parameters U: 12…500 V U: 180…265 V U: 12…800 V U: 400…1000 V Tsens: 60…180 °C R: 0.3…1800 Ω R: 4.7…5000 Ω R: 0.75…960 Ω R: 22…7500 Ω Size: Leaded, SMD, Ø: 4…22 mm Ø: 16…20 mm th: 1
Slide 4: Description of a PTC and key parameters: Typical R/T curve
Description of a PTC and key parameters: Typical R/T curve RPTC What is a PTC? A PTC (Positive Temperature Coefficient) is a resistor whose resistance varies with temperature. With increasing temperature, the resistance of the PTC will increase. RN Resistance value at 25 °C Rmin Minimum resistance o
Slide 5: Functions and applications
Functions and applications Functions of the PTC thermistor ● Limit the inrush current during charging of DC-link capacitor. ● In case of malfunction of the circuit (short-circuit switch does not close, short-circuit at the terminals) the PTC increases its resistance and limits the current to an uncr
Slide 6: PTC ICLs for capacitor charging: Product range overview
PTC ICLs for capacitor charging: Product range overview ● Housing (l x w x h) 18 x 14 x 22.2 mm ● V max AC 280…560 V ● V link max DC 400…800 V ● R25 33…100 Ohm ● Cth 1.1…2.3 J/K ● Approvals UL 1434, IECQ, VDE ● Diameter min/max 8.5…16 mm ● V max AC 260…560 V ● V link max DC 370…800 V ● R25 70…1100 O
Slide 7: PTC ICLs capacitor charging: Product range B5921X family housed type
PTC ICLs capacitor charging: Product range B5921X family housed type © TDK Electronics AG 2019 PTC Inrush Current Limiters Self-Protecting PTC Resistors PPD BG PTC PM 09/19 7
Slide 8: PTC ICLs for capacitor charging: Product range leaded disks
PTC ICLs for capacitor charging: Product range leaded disks © TDK Electronics AG 2019 PTC Inrush Current Limiters Self-Protecting PTC Resistors PPD BG PTC PM 09/19 8
Slide 9: Comparison resistance fixed resistor versus PTC ICLs
Comparison resistance fixed resistor versus PTC ICLs Resistance Current Energy absorption 1600 1400 1200 Resistor 1000 E_PTC, E_R / J 800 600 PTC 400 200 0 0,0E+00 5,0E-02 1,0E-01 1,5E-01 2,0E-01 2,5E-01 Time / s Increase of resistance at Malfunction current Comparison energy failure mode PTC versus
Slide 10: Comparison: Fixed resistor and PTC ICLs
Comparison: Fixed resistor and PTC ICLs Functionality Fixed resistor PTC Self-protection and Malfunction of relay Thermal overload possible circuit protection Self-protection and Terminal short circuit Thermal overload possible circuit protection Repetitive inrush operation Self-protection a
Slide 11: Applications (1)
Applications (1) Inverter room Washing machine Servo motor control air conditioner inverter control © TDK Electronics AG 2019 PTC Inrush Current Limiters Self-Protecting PTC Resistors PPD BG PTC PM 09/19 11
Slide 12: Applications (2)
Applications (2) Server power Frequency inverters Automotive surge protection for industrial drives on-board charging © TDK Electronics AG 2019 PTC Inrush Current Limiters Self-Protecting PTC Resistors PPD BG PTC PM 09/19 12
Slide 13: Information needed for design-in
Information needed for design-in ● Component style ● Capacitance of DC-link capacitors ● DC-link voltage ● Max. allowed charging time ● Max. allowed inrush current peak ● Time interval between charging events ● Supply source (battery, kind of rectifier) ● Expected number of charging events over life
Slide 14: www.tdk-electronics.tdk.com
www.tdk-electronics.tdk.com