VN920 Single channel high-side solid-state relay Features Type RDS(on) IOUT VCC VN920 VN920-B5 VN920SO 16 m 30 A 36 V u d o r P e CMOS compatible input Proportional load current sense Shorted load protection Under-voltage and over-voltage shutdown Over-voltage clamp Thermal shutdown Current limitation Protection against loss of ground and loss of VCC Very low standby power dissipation Reverse battery protected (see Application schematic ) SO-16L P e t e l o s b O Table 1. t e l o Description ) (s t c u d o r ) s ( ct P2PAK PENTAWATT s b O The VN920 is a monolithic device designed in STMicroelectronics VIPower M0-3 technology. The VN920 is intended for driving any type of load with one side connected to ground. The active VCC pin voltage clamp protects the device against low energy spikes (see ISO7637 transient compatibility table). Active current limitation combined with thermal shutdown and automatic restart protects the device against over-load. The device integrates an analog current sense output which delivers a current proportional to the load current. The device automatically turns off in the case where the ground pin becomes disconnected. Device summary Order codes Package Tube Tape and reel VN920 - P PAK VN920-B5 VN920-B513TR SO-16L VN920SO VN920SO13TR PENTAWATT 2 September 2013 DocID7371 Rev 6 1/34 www.st.com 34 Contents VN920 Contents 1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4 GND protection network against reverse battery . . . . . . . . . . . . . . . . . . . 16 r P e 3.1.1 Solution 1: resistor in the ground line (RGND only) . . . . . . . . . . . . . . . . 16 3.1.2 Solution 2: diode (DGND) in the ground line . . . . . . . . . . . . . . . . . . . . . 17 t e l o 3.2 Load dump protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3.3 MCU I/Os protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3.4 P2PAK maximum demagnetization energy (VCC = 13.5V) . . . . . . . . . . . 18 3.5 SO-16L maximum demagnetization energy (VCC = 13.5V) . . . . . . . . . . . 19 ) (s s b O t c u Package and PCB thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 s b O d o r 4.1 SO-16L thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.2 P2PAK thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 P e t e l o 5 2/34 u d o Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.1 6 ) s ( ct Package and packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5.1 ECOPACK(R) packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5.2 PENTAWATT mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.3 P2PAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 5.4 SO-16L packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 5.5 PENTAWATT packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 5.6 P2PAK packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 VN920 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Table 15. Table 16. Table 17. Table 18. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Suggested connections for unused and not connected pins . . . . . . . . . . . . . . . . . . . . . . . . 5 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Switching (VCC=13V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Logic inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Current sense (9V VCC 16V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 VCC output diode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Truth table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Electrical transient requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 SO-16L thermal parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 P2PAK thermal parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 SO-16L mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 PENTAWATT mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 P2PAK mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o s b O 3/34 List of figures VN920 List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21. Figure 22. Figure 23. Figure 24. Figure 25. Figure 26. Figure 27. Figure 28. Figure 29. Figure 30. Figure 31. Figure 32. Figure 33. Figure 34. Figure 35. Figure 36. Figure 37. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Configuration diagram (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Current and voltage conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Switching characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 IOUT/ISENSE versus IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Off-state output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 High-level input current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Input clamp voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Turn-on voltage slope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Over-voltage shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Turn-off voltage slope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 ILIM vs Tcase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 On-state resistance vs VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Input high-level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Input hysteresis voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 On-state resistance vs Tcase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Input low level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 P2PAK maximum turn-off current versus inductance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 SO-16L maximum turn-off current versus inductance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 SO-16L PC board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 SO-16L Rthj-amb Vs PCB copper area in open box free air condition . . . . . . . . . . . . . . . 20 SO-16L thermal impedance junction ambient single pulse . . . . . . . . . . . . . . . . . . . . . . . . 21 Thermal fitting model of a single channel HSD in SO-16L . . . . . . . . . . . . . . . . . . . . . . . . . 21 P2PAK PC board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 P2PAK Rthj-amb Vs. PCB copper area in open box free air condition . . . . . . . . . . . . . . . 23 P2PAK thermal impedance junction ambient single pulse . . . . . . . . . . . . . . . . . . . . . . . . . 23 Thermal fitting model of a single channel HSD in P2PAK. . . . . . . . . . . . . . . . . . . . . . . . . . 24 SO-16L package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 PENTAWATT package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 P2PAK package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 SO-16L tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 SO-16L tape and reel shipment (suffix "TR") . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 PENTAWATT tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 P2PAK tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 P2PAK tape and reel (suffix "13TR"). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ) s ( ct u d o r P e t e l o ) (s t c u t e l o P e s b O 4/34 d o r s b O VN920 1 Block diagram and pin description Block diagram and pin description Figure 1. Block diagram VCC OVERVOLTAGE DETECTION VCC CLAMP UNDERVOLTAGE DETECTION GND ) s ( ct Power CLAMP DRIVER du LOGIC INPUT o r P CURRENT LIMITER VDS LIMITER IOUT e t e ol OVERTEMPERATURE DETECTION Figure 2. ) (s t c u CURRENT SENSE K s b O Configuration diagram (top view) od e t e ol OUTPUT Pr 5 4 3 2 1 VCC OUTPUT C.SENSE VCC INPUT GND 1 16 OUTPUT GND OUTPUT INPUT OUTPUT C.SENSE N.C. OUTPUT OUTPUT OUTPUT N.C. VCC bs VCC N.C. 8 9 VCC P2PAK/ PENTAWATT SO-16L O Table 2. Suggested connections for unused and not connected pins Connection / pin Current Sense Floating To ground Through 1K resistor N.C. Output Input X X X X Through 10K resistor 5/34 Electrical specifications 2 VN920 Electrical specifications Figure 3. Current and voltage conventions IS VCC VF VCC IOUT OUTPUT IIN VOUT INPUT VIN ISENSE CURRENT SENSE ) s ( ct VSENSE GND IGND 2.1 u d o r P e t e l o Absolute maximum ratings Stressing the device above the rating listed in the "Absolute maximum ratings" table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not implied. Exposure to Absolute maximum rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics sure program and other relevant quality document. Table 3. VCC ol bs O t c u Absolute maximum ratings od Pr Symbol ete ) (s s b O DC supply voltage SO-16L PENTAWATT P2PAK Unit 41 V - VCC Reverse DC supply voltage - 0.3 V - Ignd DC reverse ground pin current - 200 mA IOUT DC output current Internally limited A - 21 A +/- 10 mA -3 + 15 V V 4000 2000 5000 5000 V V V V - IOUT IIN Reverse DC output current DC input current VCSENSE Current sense maximum voltage VESD 6/34 Value Parameter Electrostatic discharge (human body model: R = 1.5K; C = 100pF) INPUT CURRENT SENSE OUTPUT VCC VN920 Electrical specifications Table 3. Absolute maximum ratings (continued) Value Symbol Parameter SO-16L EMAX Maximum switching energy (L = 0.25mH; RL= 0; Vbat = 13.5V; Tjstart = 150C; IL = 45A) 352 Ptot Power dissipation TC 25C 8.3 96.1 Tj Junction operating temperature Tc Case operating temperature - 40 to 150 Storage temperature - 55 to 150 Tstg 2.2 PENTAWATT Unit 364 mJ 96.1 W Internally limited C ) s ( ct C C u d o Thermal data Table 4. P2PAK r P e Thermal data t e l o Max. value Symbol Parameter PENTAWATT P2PAK - 1.3 1.3 15 - SO-16L 1. Rthj-case Thermalresistance junction-case Rthj-lead Thermalresistance junction-lead Rthj-amb Thermalresistance junction-ambient du ct ) (s s b O 65(1) 48(3) 61.3 Unit C/W C/W 51.3(2) C/W 37(4) C/W o r P When mounted on a standard single-sided FR-4 board with 0.5cm2 of Cu (at least 35m thick) connected to all VCC pins. 2. When mounted on a standard single-sided FR-4 board with 0.5cm2 of Cu (at least 35m thick). e t e ol 3. When mounted on a standard single-sided FR-4 board with 6cm2 of Cu (at least 35m thick) connected to all VCC pins. 4. When mounted on a standard single-sided FR-4 board with 6cm2 of Cu (at least 35m thick). s b O 7/34 Electrical specifications 2.3 VN920 Electrical characteristics Values specified in this section are for 8V < VCC < 36V; -40C < Tj < 150C, unless otherwise stated. Table 5. Power Symbol Parameter VCC Test conditions Min. Typ. Operating supply voltage 5.5 13 36 V VUSD Under-voltage shutdown 3 4 5.5 V VOV Over-voltage shutdown 36 RON On-state resistance ICC = 20mA Off-state; VCC = 13V; VIN = VOUT = 0V e t e ol Off-state; VCC = 13V; VIN = VOUT = 0V; Tj = 25C Supply current IS V IOUT = 10A; Tj = 25C; IOUT = 10A; IOUT = 3A; VCC = 6V VCLAMP Clamp voltage Off-state output current IL(off2) Off-state output current IL(off3) Off-state output current IL(off4) e t e ol Note: bs O 8/34 du o r P Off-state output current m m m du 41 48 55 V o r P 10 25 A 10 20 A 5 mA s b O 0 50 A VIN = 0V; VOUT = 3.5V -75 0 A VIN = VOUT = 0V; VCC = 13V; Tj = 125C 5 A VIN = VOUT = 0V; VCC = 13V; Tj = 25C 3 A )- s ( t c 16 32 55 ) s ( ct On-state; VCC = 13V; VIN = 5V; IOUT = 0A; RSENSE = 3.9 k IL(off1) Max. Unit VIN = VOUT = 0V VCLAMP and VOV are correlated. Typical difference is 5V. Table 6. Symbol Switching (VCC=13V) Parameter Test conditions Min. Typ. Max. Unit td(on) Turn-on delay time RL = 1.3 (see Figure 4.) 50 s td(off) Turn-off delay time RL = 1.3 (see Figure 4.) 50 s dVOUT/dt(on) Turn-on voltage slope RL = 1.3 (see Figure 4.) See Figure 10. V/s dVOUT/dt(off) Turn-off voltage slope RL = 1.3 (see Figure 4.) See Figure 12. V/s VN920 Electrical specifications Table 7. Logic inputs Symbol Parameter VIL Input low level voltage IIL Low level input current VIH Input high-level voltage IIH High-level input current VI(hyst) Input hysteresis voltage VICL K1 dK1/K1 K2 dK2/K2 K3 b O ISENSE0 VSENSE VSENSEH Typ. Unit 1.25 V A 3.25 V 10 0.5 IIN = 1mA IIN = - 1mA Test conditions IOUT/ISENSE IOUT = 1A; VSENSE = 0.5V; Tj = -40C...150C Current sense ratio drift IOUT = 1A; VSENSE = 0.5V; Tj= - 40C...150C IOUT/ISENSE IOUT = 10A; VSENSE = 4V; Tj = - 40C Tj= 25C...150C Current sense ratio drift IOUT = 10A; VSENSE = 4V; Tj = -40C...150C IOUT/ISENSE IOUT = 30A; VSENSE = 4V; Tj = -40C Tj = 25C...150C e t e l o s b O ) s ( t c u d o Max. 1 VIN = 3.25V Parameter Pr dK3/K3 Min. 6 6.8 - 0.7 8 Current sense ratio drift IOUT = 30A; VSENSE = 4V; Tj = -40C...150C Analog sense current VCC = 6...16V; IOUT = 0A; VSENSE = 0V; Tj = -40C...150C Max analog sense output voltage VCC = 5.5V; IOUT = 5A; RSENSE = 10k VCC > 8V, IOUT = 10A; RSENSE = 10k Sense voltage in over-temperature VCC = 13V; RSENSE = 3.9k condition o r P Typ. 4400 -10 4200 4400 -8 4200 4400 Max. % 6000 5750 +8 4900 4900 Unit 6000 +10 4900 4900 V V ) s ( ct du Min. 3300 A V Current sense (9V VCC 16V) Symbol e t e l VIN = 1.25V Input clamp voltage Table 8. so Test conditions % 5500 5250 -6 +6 % 0 10 A 2 V 4 V 5.5 V 9/34 Electrical specifications Table 8. Symbol VN920 Current sense (9V VCC 16V) (continued) Parameter Test conditions Min. Typ. Analog sense output VCC = 13V; Tj > TTSD; RVSENSEH impedance in output open over-temperature condition tDSENSE Current sense delay response Max. Unit 400 To 90% ISENSE(1) 500 s 1. Current sense signal delay after positive input slope. Table 9. Symbol Parameter Test conditions VF Forward on voltage - IOUT = 5A; Tj = 150C Table 10. Protections(1) Symbol Parameter TTSD TR Reset temperature Thyst Thermal hysteresis Current limitation Vdemag VON e t e ol s b O 10/34 o r P du Output voltage drop limitation o s b O ) s ( t c Turn-off output clamp voltage Min. VCC = 13V 5V < VCC < 36V Typ. u d o r P e let Test conditions Shutdown temperature Ilim ) s ( ct VCC output diode Max. Unit 0.6 V Min. Typ. Max. Unit 150 175 200 C 135 C 7 15 30 45 C 75 75 A A IOUT = 2 A; VIN = 0V; L = 6mH VCC - 41 VCC - 48 VCC - 55 V IOUT = 1 A; Tj = -40C...150C 50 mV 1. To ensure long term reliability under heavy over-load or short circuit conditions, protection and related diagnostic signals must be used together with a proper software strategy. If the device operates under abnormal conditions this software must limit the duration and number of activation cycles. VN920 Electrical specifications Table 11. Truth table Conditions Input Output Sense Normal operation L H L H 0 Nominal Over-temperature L H L L 0 VSENSEH Under-voltage L H L L 0 0 Over-voltage L H L L 0 0 Short circuit to GND L H H L L L Short circuit to VCC L H H H Negative output voltage clamp L Table 12. Test pulse I 1 - 25V(1) 2 + 25V(1) Pr e t e l o s b 5 (1) - 25V + 25V - )II s b O 0 (1) 4V(1) + 26.5V(1) III IV Delays and impedance - 50V(1) - 75V(1) - 100V(1) 2ms, 10 + 50V(1) + 75V(1) + 100V(1) 0.2ms, 10 - 50V(1) 100V(1) - 150V(1) 0.1s, 50 + 50V(1) + 100V(1) 0.1s, 50 - 5V(1) 7V(1) 100ms, 0.01 t(s uc od 3a 4 t e l o L 0 < Nominal Test level 7637/1 3b u d o r P e Electrical transient requirements ISO T/R ) s ( ct 0 (TjTTSD) VSENSEH + 46.5V(2) - + 75V(1) - 6V(1) + 66.5V(2) - + 86.5V(2) 400ms, 2 1. All functions of the device are performed as designed after exposure to disturbance. 2. One or more functions of the device is not performed as designed after exposure and cannot be returned to proper operation without replacing the device. O 11/34 Electrical specifications Figure 4. VN920 Switching characteristics VOUT 90% 80% dVOUT/dt(off) dVOUT/dt(on) 10% tr tf t ISENSE 90% t u d o tDSENSE INPUT td(on) ) s ( ct td(off) r P e t e l o Figure 5. ) (s IOUT/ISENSE versus IOUT IOUT/ISENSE d o r P e 5500 t e l o s b O s b O t c u 6500 6000 t max.Tj=-40C max.Tj=25...150C 5000 typical value min.Tj=25...150C 4500 min.Tj=-40C 4000 3500 3000 0 2 4 6 8 10 12 14 16 IOUT (A) 12/34 18 20 22 24 26 28 30 32 VN920 Electrical specifications Figure 6. Waveforms NORMAL OPERATION INPUT LOAD CURRENT SENSE UNDERVOLTAGE VCC VUSDhyst VUSD INPUT ) s ( ct LOAD CURRENT SENSE u d o OVERVOLTAGE r P e VOV VCC VOVhyst VCC > VUSD INPUT LOAD CURRENT SENSE t e l o s b O SHORT TO GROUND INPUT ) (s LOAD CURRENT LOAD VOLTAGE SENSE od r P e INPUT s b O t e l o t c u SHORT TO VCC LOAD VOLTAGE LOAD CURRENT SENSE