AUIR3200S

Automotive IPS Automotive grade MOSFET Driver AUIR3200S MOSFET DRIVER WITH PROTECTION AND DIAGNOSTIC Features        Product Summary Bootstrap and charge pump Over temperature shutdown (with Ptc interface) Short circuit protection (Vds detection) Reverse battery protection (turns On the MOSFET) Ground loss protection Diagnostic ESD protection Operating voltage 6-36V Vgate 6V Package Description The AUIR3200S is a high side mosfet driver for very low Rdson automotive application. It offers over-current, overtemperature protection and diagnostic. The over-current protection is done by monitoring the Vds voltage, the threshold is programmable by external resistor. The overtemperature protection uses a thermal sensor. The AUIR3200S offers diagnostic on the input pin. SO8 Ordering Information Base Part Number Standard Pack Package Type Complete Part Number Form AUIR3200S 1 Rev 1.1 SOIC-8 leads Tape and Reel Quantity 2500 AUIR3200STR 2016-05-2 AUIR3200S Typical Connection Ptc sensor +Bat Rvds Rin Vds Vcc Ptc G MOSFET Logic level Rgate In/Dg S Rdiag Gnd Cboot Input Signal 2 Rev 1.1 V Diag AUIR3200S 100nF Load 2016-05-02 AUIR3200S Absolute Maximum Ratings Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are referenced to Ground lead. (Tj= -40°C..150°C unless otherwise specified). Symbol Parameter Min. Max. Vcc-gnd Vcc-Vds Vcc-Vptc Vin-gnd Vcc-Vs Vcboot-Vs Vcc cont. Maximum Vcc voltage Maximum Vds pin voltage Maximum Ptc pin voltage Maximum IN pin voltage Maximum S pin voltage Maximum Cboot pin voltage Maximum continuous Vcc voltage Maximum operating junction temperature Maximum storage temperature Soldering temperature (10 seconds) -0.3 -0.3 -0.3 -0.3 -0.3 -0.3  60 5.5 5.5 5.5 60 8 36 150 150 300 Typ. Max. Units 100  °C/W Min. Max. Units 2.7 0 10 4 5.5 0.9 15 15 2.9 Tj max. Tsoldering  -40 -55 Units V °C Thermal Characteristics Symbol Parameter Rth Thermal resistance junction to ambient Recommended Operating Conditions Symbol Parameter VIH VIL Rin Rdiag Rvds High level input voltage Low level input voltage Recommended resistor in series with IN pin Recommended resistor in series with Diag pin Maximum recommended Rvds, see page 7 3 Rev 1.1  V k 2016-05-02 AUIR3200S Static Electrical Characteristics Tj=-40°C..125°C, Vcc=6-36V (unless otherwise specified), typical value are given for Vcc=14V and Tj=25°C. Symbol Parameter Vcc op. Icc Off Operating voltage range Supply current in sleep mode Tj=25°C  Icc On Supply current when On  VIH VIL In hyst. Iin on Vgs IN High threshold voltage IN Low threshold voltage Input hysteresis On state input current Gate output voltage Gate output voltage during reverse battery Tj=25°C Input voltage when the part is in fault mode  Vgs rev Vin, off Min. Typ. Max. Units 6  1 36 5 V µA 10 15 mA 5 2 1.7 0.5 33 5.7 2.6 2.1 1 50 7 4.5 5.6 7  0.25 0.4 0.5 0.2  Test Conditions Vcc=14V, Vin=0V Vin=5V, Vptc=Vbat, Vds=Vbat V µA V Vin=5V Igs=0µA Igs=50µA, Vbat=14V Idg=300µA Protection Characteristics Tj=-40°C..125°C, Vcc=6-36V (unless otherwise specified), typical value are given for Vcc=14V and Tj=25°C. Symbol Parameter Ivds Vds current reference Vds offset Vds comparator offset Vds detection blanking time during turn on Diagnostic time Time to enter in sleep mode Time to enter in sleep mode and reset the fault Tblank on Tdiag Tsleep Treset Min. Typ. Max. 0.7 0.84 1 -10 0.8 0.93 1.15 0 0.91 1.05 1.33 10 15 22 35  7 10 15 30  5  Time to leave the sleep mode   0.5 Tpwr on rst UV T UV hold Power on reset duration Tj=25°C Under voltage threshold Time to keep UV detection active Ptc sensor threshold value when over temperature 40 150 100 5.2 350 200 5.9 600 1.3 5 14.3 Ptc_sensor Pull down resistor on the PTC pin 4 10 20 Vptc PTC comparator voltage threshold (Vcc-Vptc) 1.5 2 2.5 Rev 1.1 Vcc-Vds=0V, Tj=-40°C Vcc-Vds=0V, Tj=25°C Vcc-Vds=0V, Tj=125°C mV µs ms see figure 6 µs Rin=10k see figure 7 &8 V µs see page 2 & 8 k Rptc 4 mA Test Conditions  Twkp  Units V Buit-in resistor See page 6 Vin=5V, Vcc=14V 2016-05-02 AUIR3200S Switching Characteristics Tj=-40..125°C, Vcc=6..36V (unless otherwise specified), typical value are given for Vcc=14V and Tj=25°C. Symbol Parameter Tdon Tr Tdoff Tf Igs+ IgsIboot Vboot-Source Turn-on delay to 20% of Vgs Rise time 20% to 80% of Vgs Turn off delay time to 80% of Vgs Fall time from 80% to 20% of Vgs Gate output high pulsed current Gate output low pulsed current Cboot capacitor charge current Cboot capacitor charge voltage Min. Typ. Max.     1.6 1 2 1 160 130 0.8 6         100 100 0.35 5.6 Units Test Conditions µs Qg=220nc, Rgate=0 mA Vgs=0V Vgs=5.7V A V True Table Operating Conditions IN OUT DG Normal ON Normal OFF Short circuit to Gnd Short circuit to Gnd Over-temperature Over-temperature H L H L H L H L L L L L H L L L L L 5 Rev 1.1 2016-05-02 AUIR3200S Lead Assignments Functional Block Diagram All values are typical Vds VCC PTC 6V 1mA 6V 75V Charge Pump Vcc-6V 2V IN/DG 150k 6V 1.7V S Q R Q Level Shifter t Blanking ON Diagnostic Sleep mode 6V - S Boot strap regulator Vptc=Vcc-2V 10k 100 + G + UV Driver 11V Rptc 4 clk Counter Cboot Vcc-6V GND 6 Rev 1.1 2016-05-02 AUIR3200S Over-current protection The over-current protection is done by monitoring the Vds voltage of the Mosfet. The threshold is adjusted by connecting the appropriate resistor between Vcc and Vds pin => Rvds. Below the formula to set the appropriate over-current threshold: Isd _ threshold  Ivds  Rvds RdsOn We advise to you to take low tolerance resistor for Rvds for optimize the precision of your current level protection. The AUIR3200S doesn’t have feedback of the Mosfet temperature. We take in the consideration that Tcase of AUIR3200S will be almost the same like the Tcase of Mosfet. The current Ivds has a positive temperature coefficient to compensate the positive temperature coefficient of the Rdson of the Mosfet. The above formula is only valid when the Mosfet is fully ON. Therefore during the turn on of the MOSFET, the time ‘Tblank on’ disables the vds protection until the Mosfet is fully On. Therefore a maximum resistor is specified for Rvds in the recommended section. With a higher resistor, the part will latch. Vin (V) 0 t Over-current shutdown Iout (A) 0 t Vds (V) Vds > Vrvds V Rvds (V) 0 Vds threshold t Vdiag (V) 0 t Figure 1: Protection Vds 7 Rev 1.1 2016-05-02 AUIR3200S Over-temperature protection The temperature protection uses a PTC sensor connected to the tab or the drain of the Mosfet depending on the mounting. This sensor will increase with the temperature. When his value is above 5kΩ (typical value) the protection will be activated. Vin (V) 0 t Iout (A) 0 Vcc - Vptc (V) t 2V (typ.) 0 t Over-temperature shutdown Tj (°C) 0 t Vdiag (V) 0 t VPTC > 2V when the RPTC > 5kΩ: Figure 2: Protection PTC For optimize the precision of the protection it is important to maximize the thermal interface between the sensor and the junction. The PTC sensor needs to be placed the closest possible of the MOSFET and to be surrounded by copper. The connection with AUIR3200S could be doing by a trace in bottom side of the PCB. Copper plan MOSFET PTC sensor Figure 3: Layout example (top side) 8 Rev 1.1 2016-05-02 AUIR3200S The PTC protection could be activated if PTC sensor is higher than 1.3kΩ (see page 4: ‘Ptc sensor’ characteristic). In this area the PTC protection could be activated PTC sensor VDS threshold VDS threshold Tblank On 0V Tblank On Vdiag Normal mode Fault mode Figure 13 14 Rev 1.1 2016-05-02 AUIR3200S Under voltage protection in short-circuit mode During short circuit condition, it may happen that the supply voltage drops below the under voltage before the short is detected by the Vds protection due to the blanking time ‘Tblank on’. In under voltage condition the AUIR3200S turns off the MOSFET. The time ‘Tblank On’ is reset. IN Vcc UV 0V T UV hold Vds MOSFET 0V Tblank On Tblank On Figure 14 In order to detect the short circuit condition, the AUIR3200S has a counter and after 4 ‘under voltage’ detections, the part is latched and the fault diagnostic is activated. The counter is reset when the part goes to sleep mode. IN Vcc UV 0V Vds MOSFET 0V Vdiag Normal mode Fault mode sleep mode Figure 15 15 Rev 1.1 2016-05-02 AUIR3200S PWM operation ( Ton