STRVS

Repetitive Suppressors STRVS For Overvoltage Protection

www.FutureElectronics.com/ST STRVS Repetitive Voltage Suppressors

The STRVS series is the first This allows the designer to select the correct transient voltage suppressor device with confidence that it will provide the series specified to protect against protection at high operating temperature over a wide range of currents. repetitive over in high temperature conditions. Key Features STRVS In many applications, overvoltage transients may • Two key parameters specified at come from the circuit itself and not from exter- high temperature nal sources like , electrical overstress or • VCL for multiple temperatures and . In such cases, the stan- peak current from 0 to 2A dards normally applied to overvoltage transient • RD for multiple temperatures and suppression testing do not apply. peak currents from 0 to 2A • Application note supporting In applications like switching power supplies, a product selection: AN4209 voltage transient is typically generated at each turn off of the power device. To prevent damage • Improved power derating versus temperature to the power device, the peak voltage transient must be limited below the breakdown voltage of the transistor.

The STRVS is the first series of transient voltage suppressors that are specifically designed to work at high temperature with repetitive

transients. Typical clamping voltage versus device current at selected operating temperature Repetitive surges may raise the protection device temperature as the device absorbs the transient Key Benefits energy. For this reason, protection devices must ™ be selected according to their power capability • Better Transil selection for cost optimization at high junction temperatures and their clamping (oversizing avoided) voltage specified at high temperature. • Fixed and reliable clamping voltage not sensitive to output load The clamping voltage and series resistance of • Better protection with smaller package the STRVS are specified not only at room tem- versus competition perature but at 125ºC which is close to ambient • Reduced power consumption versus discrete temperature for many SMPS applications. protection (RC snubber) • Customer design effort reduced

www.FutureElectronics.com/ST

STRVS Repetitive Voltage Suppressors

TARGETED APPLICATIONS Using STRVS STRVS MOSFET and IGBT • Maximum clamping voltage only depending on STRVS Protection in • Device is characterized and specified • Solar inverters specifically for repetitive transients • SMPS and auxiliary power supplies • Margin on VDS can be easily calculated • Smart metering • Plug and play solution; no clamping voltage • LED drivers (VCL) change due to load variation

Switch Mode Power Supply Application

Unclamped switch mode power supply circuit Switch mode power supply with STRVS clamp

Voltage transients in unclamped power supply Switch mode power supply with STRVS clamp at the MOS drain at the MOS drain February 2014

V (typ. I max @V BR RM RM with I = 1 Values @125ºC (25ºC) R mA) Part Number Packages Vpeak I (typ) V STRVS (µA) (V) (V) peak CL0 R (Ω) (A) (V) at (V) D Ipeak(A)

STRVS118X02C 0.2 85 100 2 118 116 1.0 SMC STRVS142X02F 1 102 120 2 142 140 1.0 DO-201 STRVS182X02F 1 128 150 2 182 177 2.5 DO-201 STRVS185X02B/E 0.2 128 150 2 185 178 3.5 SMB/DO-15 STRS222X02F 1 154 180 2 222 213 4.5 DO-201 STRVS225X02E 0.5 154 180 2 225 214 5.5 DO-15 STRVS241X02E 0.5 171 200 2 241 234 3.5 DO-15 STRVS248X02C 0.2 171 200 2 248 238 5.0 SMC STRS252X02F 1 171 200 2 252 239 6.5 DO-201 STRVS280X02F(*) 1 188 220 2 280 263 8.5 DO-201

A A A A K K K K SMB SMC DO-15 DO-201

www.FutureElectronics.com/ST