FP0100 features ? up to 100v input voltage protection ? low on resistance C 4.0 typical ? fast switching speed ? no external supplies needed applications ? power supplies ? fast resettable fuse ? high side switches ? data acquisition general description the supertex FP0100 is a high voltage fault protection switch with current fold-back. it is designed to protect system output power supplies against over-current or short circuit conditions. in protection mode, the FP0100 limits the current to 300a. the FP0100 can be considered as a normally closed switch with a typical switch resistance of 4.0 . the peak current allowed to pass through the switch can be set by an external resistor across vout and rsen. once the voltage drop across vin and vout exceeds a nominal value of 3.0v, the input current will fold-back to 300a. in the off state, the FP0100 can withstand up to 100v. higher input voltages can be accommodated by using an external depletion-mode mosfet. please refer to figure 4 for more details. the FP0100 is available in a sot-89 package. fault protection switch with current fold-back typical application circuit FP0100 load + v in - vin vout rsen r sen supertex inc. supertex inc. 1235 bordeaux drive, sunnyvale, ca 94089 t el: 408-222-8888 www .supertex.com
2 FP0100 absolute maximum ratings parameter value v in - v out , differential input voltage range 0 to +110v maximum junction temperature +125c storage temperature range -65 to +150c power dissipation, t a @25c 1.6w 1 absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditions is not implied. continuous operation of the device at the absolute rating level may affect device reliability. all voltages are referenced to device ground. note: 1. mounted on fr4 board, 25mm x 25mm x 1.57mm. ordering information device package sot-89 FP0100 FP0100n8-g -g indicates package is rohs compliant (green) pin confguration to-243aa (sot-89) (n8) to-243aa (sot-89) (n8) y = code for year sealed w = code for week sealed = ?green? packaging f10yw product marking package may or may not include the following marks: si or vin rsen vout vout sym parameter min typ max units conditions v in - v out differential input voltage range 0 - 100 v v out = gnd, i in = 600a i peak peak current - 260 - ma r sen - 20 40 ma r sen - 10 20 ma r sen i off off current - 300 600 a v in - v out = 100v, see i-v curve r on on resistance - 4.0 6.0 i in = 20ma, r sen v trip v in - out trip point to turn off - 3.0 - v r sen , in = 90% of i peak see i-v curve v off switch turn off voltage - - 4.5 v i off t j operating junction temperature -40 - +125 c --- electrical characteristics (t a = 25 o c unless otherwise specifed) block diagram vin vout rsen switch control i peak control + supertex inc. 1235 bordeaux drive, sunnyvale, ca 94089 t el: 408-222-8888 www .supertex.com
3 FP0100 figure 1. typical i-v characteristics i in i peak i off v in - v out v trip v off 100v i off = 300a 90% i peak figure 2. test circuit for i peak vs r sen the input peak current, i peak , can be lowered by adding an external resistor across the rsen and vout pins as shown in the test circuit in figure 2. i peak will decrease as the resis - tor value of r sen increases. the typical i peak vs r sen charac- teristic is shown in figure 3. FP0100 + v in - vin vout rsen r sen i peak 1000.0 100.0 10.0 1.0 0.1 1.0 10.0 100.0 1000.0 10000. 0 r sen () i peak (ma) i peak vs r sen figure 3. typical i peak vs r sen characteristic supertex inc. 1235 bordeaux drive, sunnyvale, ca 94089 t el: 408-222-8888 www .supertex.com
4 FP0100 figure 4. higher input voltage application figure 5. short circuit test performance the FP0100 has a typical response time of less than 30ns. the short circuit test set-up is shown in figure 5. the output is at 60v prior to a short. a 10 resistor is used to measure the current going into the FP0100. a 220nf ceramic capaci - tor is added on the input to supply any transient currents that might occur. the waveform is shown in figure 6. channel 1 is the output voltage which is discharged to 0v. channel 2 is the voltage across the 10 resistor. the input current peaks to 400ma then decays quickly within 20ns. 10 FP0100 + 60v - vin vout rsen short to ground v out 220n f i in FP0100 vin vout rsen r sen input 0 to 450v dn3545 7.5v 150k + 7.5v - output supertex inc. 1235 bordeaux drive, sunnyvale, ca 94089 t el: 408-222-8888 www .supertex.com
5 FP0100 pin description pin # pin name description 1 vin input voltage 2, 4 vout output voltage 3 rsen current sense for i peak control. connects to an external resistor across the rsen and vout pins to set the i peak . figure 6. typical short circuit waveforms 60v v out 0v 4.0v v 10 0v supertex inc. 1235 bordeaux drive, sunnyvale, ca 94089 t el: 408-222-8888 www .supertex.com
6 (the package drawing(s) in this data sheet may not refect the most current specifcations. for the latest package outline information go to http://www.supertex.com/packaging.html .) FP0100 doc.# dsfp-FP0100 b051311 3-lead to-243aa (sot-89) package outline (n8) symbol a b b1 c d d1 e e1 e e1 h l dimensions (mm) min 1.40 0.44 0.36 0.35 4.40 1.62 2.29 2.00 ? 1.50 bsc 3.00 bsc 3.94 0.73 ? nom - - - - - - - - - - max 1.60 0.56 0.48 0.44 4.60 1.83 2.60 2.29 4.25 1.20 jedec registration to-243, variation aa, issue c, july 1986. ? this dimension differs from the jedec drawing drawings not to scale . supertex doc. #: dspd-3to243aan8, version f111010. b b1 d d1 e h e1 c a 12 3 e e1 to p v iew side v iew l supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such appl ications unless it receives an adequate ?product liability indemnification insurance agreement.? supertex inc. does not assume responsibility for use of devices described, and limits its liability to the replacement of the devices determined defective due to workmanship. no responsibility is assumed for possible omissions and inaccuracies. circuitry and specifications are subject to change without notice. for the latest product specifications refer to the supertex inc. (website: http//www .supertex.com) ?201 1 supertex inc. a ll rights reserved. unauthorized use or reproduction is prohibited. supertex inc. 1235 bordeaux drive, sunnyvale, ca 94089 t el: 408-222-8888 www .supertex.com
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