FP0100N8-G

Supertex inc. FP0100 Fault Protection Switch with Current Fold-back Features ►► ►► ►► ►► 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 300µA. Up to 100V input voltage protection Low on resistance – 4.0Ω typical Fast switching speed No external supplies needed The FP0100 can be considered as a normally closed switch with a typical switch resistance of 4.0Ω. 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 300µA. 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. Applications ►► ►► ►► ►► Power supplies Fast resettable fuse High side switches Data acquisition Typical Application Circuit VIN + VIN - RSEN FP0100 RSEN VOUT LOAD Doc.# DSFP-FP0100 C070113 Supertex inc. www.supertex.com FP0100 Pin Configuration Ordering Information Part Number Package Packing FP0100N8-G 3-Lead SOT-89 2000/Reel VOUT -G denotes a lead (Pb)-free / RoHS compliant package VIN RSEN VOUT TO-243AA (SOT-89) ESD Sensitive Device Product Marking Absolute Maximum Ratings Parameter F10YW Value VIN - VOUT, differential input voltage range 0 to +110V Maximum junction temperature Package may or may not include the following marks: Si or +125°C Storage temperature range TO-243AA (SOT-89) -65° to +150°C Power dissipation, TA@25°C Y = Code for year sealed W = Code for week sealed = “Green” Packaging Typical Thermal Resistance 1.6W1 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. Package θja 3-Lead SOT-89 133OC/W Note: 1. Mounted on FR4 board, 25mm x 25mm x 1.57mm. Electrical Characteristics (T A Sym VIN - VOUT IPEAK = 25OC unless otherwise specified) Parameter Differential input voltage range Peak current Min Typ Max Units Conditions 0 - 100 V - 260 - mA RSEN = 0Ω - 20 40 mA RSEN = 50Ω - 10 20 mA RSEN = 100Ω VOUT = GND, IIN = 600µA IOFF Off current - 300 600 µA VIN - VOUT = 100V, See I-V curve RON On resistance - 4.0 6.0 Ω IIN = 20mA, RSEN = 0Ω VTRIP VIN - OUT trip point to turn off - 3.0 - V RSEN = 50Ω, IIN = 90% of IPEAK See I-V curve VOFF Switch turn off voltage - - 4.5 V IOFF ≤ 600µA -40 - +125 °C --- TJ Operating junction temperature Block Diagram RSEN VIN Switch IPEAK + Control Control Doc.# DSFP-FP0100 C070113 2 VOUT Supertex inc. www.supertex.com FP0100 Figure 1. Typical I-V Characteristics IPEAK 90% IPEAK IIN IOFF = 300µA IOFF VIN - VOUT VTRIP VOFF 100V Figure 2. Test Circuit for IPEAK vs RSEN IPEAK VIN + VIN - RSEN FP0100 RSEN VOUT The input peak current, IPEAK, can be lowered by adding an external resistor across the RSEN and VOUT pins as shown in the test circuit in Figure 2. IPEAK will decrease as the resis- tor value of RSEN increases. The typical IPEAK vs RSEN characteristic is shown in Figure 3. Figure 3. Typical IPEAK vs RSEN Characteristic IPEAK vs RSEN 1000.0 IPEAK (mA) 100.0 10.0 1.0 0.1 1.0 10.0 100.0 1000.0 10000.0 RSEN (Ω) Doc.# DSFP-FP0100 C070113 3 Supertex inc. www.supertex.com FP0100 Figure 4. Higher Input Voltage Application Input 0 to 450V DN3545 ±7.5V VIN 150kΩ RSEN FP0100 RSEN VOUT + 7.5V - Output Figure 5. Short Circuit Test Performance IIN VIN 10Ω + 220nF RSEN FP0100 Short to Ground - 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 10Ω resistor is used to measure the current going into the FP0100. A 220nF ceramic capacitor is added on the input to supply any transient currents that Doc.# DSFP-FP0100 C070113 VOUT VOUT 60V 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 10Ω resistor. The input current peaks to 400mA then decays quickly within 20ns. 4 Supertex inc. www.supertex.com FP0100 Figure 6. Typical Short Circuit Waveforms 60V VOUT 0V 4.0V V10Ω 0V Pin Description Pin # Pin Name Description 1 VIN Input voltage 2, 4 VOUT Output voltage 3 RSEN Current sense for IPEAK control. Connects to an external resistor across the RSEN and VOUT pins to set the IPEAK. Doc.# DSFP-FP0100 C070113 5 Supertex inc. www.supertex.com FP0100 3-Lead TO-243AA (SOT-89) Package Outline (N8) D D1 C E H L 1 2 E1 3 b b1 e A e1 Top View Symbol Dimensions (mm) Side View A b b1 C D D1 E E1 e MIN 1.40 0.44 0.36 0.35 4.40 1.62 2.29 2.00† NOM - - - - - - - - MAX 1.60 0.56 0.48 0.44 4.60 1.83 2.60 2.29 1.50 BSC e1 3.00 BSC H L 3.94 0.73† - - 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. (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to http://www.supertex.com/packaging.html.) Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications 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) Supertex inc. ©2013 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited. Doc.# DSFP-FP0100 C070113 6 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com