TPD2004F

TPD2004F TOSHIBA | Alldatasheet

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TENTATIVE TOSHIBA INTELLIGENT POWER DEVICE SILICON MONOLITHIC POWER MOS IC 2-ch SQUIB DRIVER FOR AIR BAGS Manufactured by the Bi-CMOS-DMOS process, this 2- channel squib drive IPD is designed for use in SRS electronic system air bags. FEATURES — - << @ Using independent four-channel inputs, this IC controls Qe a5 two high-side and two low-side switches, making it possible to drive two squibs directly. @ Incorporates various diagnostic functions (analog multiplexer outputs) : $SOP24-P-300-1.00B * Squib short-to-battery diagnosis Weight : 0.29g (Typ.) * Squib short-to-ground diagnosis * Squib open-circuit diagnosis * Safing sensor-ON unusual diagnosis * High-redundancy, upstream arrangement for safing sensor * Squib short diagnosis * Squib drive MOSFET diagnosis ®@ Chip select function allows for multi-channel structure to be materialized using minimum control lines. © Comes in a 24-pin SSOP surface mount package. @ Supports emboss taping. 980508EBA1 @ TOSHIBA is continually working to improve the quality and the reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to observe standards of safety, and to avoid situations in which a malfunction or failure of a TOSHIBA product could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent products specifications. Also, please keep in mind the precautions and conditions set forth in the TOSHIBA Semiconductor Reliability Handbook. Ste products described in this document are subject to foreign exchange and foreign trade laws. The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. @ The information contained herein is subject to change without notice. 1998-09-11 1/10

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[1 | st+ [Squib positive (+) side output pin for channel? SS [4 | Vag [Backup block power supply input pin SSS [5 | SHTD__ [Control input pin for short diagnosis Pulldowa) ——————SSSSC—iS [6 | “ENB [INHIBIT input pin to inhibit ignition when this input is pulled Tow Pulldown) _ [8 | 1s07 [Low-side driver control input pin for Channel 1 Pullup) ——————SSS—i& } 2 | set [ann SNe Peter Sones ine nd nee me SELT (Pull-down) (Shared with reference resistor pin for short diagnosis) 72,73 [GND [Ground pin (Two ping) SSSCS—~S resistor pin shorting diagnosis) [76 | 305 [Squib switchover control input pin during each squib diagnosis. (Pulldown) | 7, 19 | Vcc | 5V block power supply input pin (Two pins) P20 | cS [Chip select control input pin (Pullup) SSS | 2 | co) [ncteence restr come pry ENS |

21 CCAD) A A

(Reference resistor connect pin) [23 | 382 [Safing senior connect pin for Channel 2S [23 | #02 [High-side driver control input pin for Channel 2 (Pulldown) ———————d [24 [s02+ [squib positive (+) side output pin for Channel2SSSSCS—S 1998-09-11 4/10

MULTIPL| DIVIDING SQUIB |HSD1 LSD1|LSD2] SELT |SHTD} SQS cs | EXER |VOLTAGE ch sw Ignition SQ a a [*[- | = | [soz [*tHpT* fet et ey fat eT = | = | [sor feftetH{a{efatetafeft a | = | jagnosi PsarfetetTH{H{[H{[w{etHtet 2 | - | Short Diagnosis [soz PetetrHtH{eta{a{atet 3s [ =- | [soz Tie tetTH{H{[ ATH] HA Tet 4 | — | $S1 Potential Diagnosis $S2 Potential Diagnosis $1 Potential Diagnosis soo [fel le foe fe fe lel = | om | $S2 Potential Diagnosis some fe fefe lee fe fale > | | SQ-1 Potential SQ-2 Potential SQ-1 Potential SQ-2 Potential High-side Driver [sor fu {etTHtTaH{efetetut{ey 6 | sw2 | Diagnosis [saz fetRH{ HiT HT efetatutey se | sw | Low-side Driver [sor fe tetetufetetepatet 6 [= | * : Don’t Care (Note) When ENB input is pulled low, ignition is inhibited. (Note) When CS is high, the diagnostic inputs SELT, SHTD, and SQS are ignored (in logic) and the AO pin is placed in the high-impedance state. (Note) If ignited under shorted condition, the device may break down. 1998-09-11 5/10

(1) 2-ch squib drive function Using independent four-channel inputs, this IC controls two high-side and two low-side switches, making it possible to drive two squibs directly. (2) Squib line short-to-battery, short-to-groud and open-circuit diagnostic function (diagnostic voltage output) When the squib is in normal state, by an external diagnostic resistor, the device outputs a voltage derived from Vcc by dividing it according to the resistance ratio. Because this voltage is output via the analog multiplexer, it is possible to diagnose short-to-battery, short-to-groud and open-circuit in the squib line by a microcomputer. Also, the device contains a shunt circuit to prevent the analog multiplexer from breaking down when squib is short-to-battery. (3) Squib short diagnostic function (diagnostic voltage output) A diagnostic current is flowed from the internal constant-current source to the squib and reference resistor, and a voltage drop in each is amplified by an internal amp whose gain is the same for both. These voltages are output via the analog multiplexer, so that the squib resistance value can be diagnosed by a microcomputer. Also, the relative accuracy of the output voltages is guaranteed to be within + 10%. (4) Squib driver MOSFET diagnostic function (diagnostic voltage output) When the squib driver is turned on while the safing sensor is in normal state, the MOSFET's drain voltage is output via the analog multiplexer, making it possible to diagnose the MOSFET by a microcomputer. (5) Diagnostic chip select function Since the device has a chip select function, the diagnostic control bits can be minimized when the application circuit is configured with multiple chips. Furthermore, since when a chip is not selected, diagnostic output pin AO is placed in the high-impedance state, it is possible to diagnose multiple chips using a 1-ch CPU A/D port. (Ignition operates irrespective of CS.) (6) Input INHIBIT function This function is provided to prevent erroneous ignition due to a fault in microcomputer or system power supply. It allows for ignition to be inhibited by pulling the ENB pin low. 1998-09-11 6/10

ABSOLUTE MAXIMUM RATING (Ta = - 40~85°C) CHARACTERISTIC SYMBOL RATING UNIT Powe spn vase [vee | | Power Supply Voltage Vv aes 7 Input Voltage Backup Capacitor Capacitance 1500 (1ch) Backup Capacitor Charging cw 25 v Voltage Squib ONTime ee Squib Driver Current \\ (channel) SQ [Power Dissipation |? | 08 |W Operating Temperature -40~85 Storage Temperature -55~150 (Note) The squib driver uses a 60V tolerant output device. However, this does not guarantee that the squib tolerates 60V because this varies with the withstand voltages of peripheral circuits. 1998-09-11 7/10

ELECTRICAL CHARACTERISTICS (Ta = - 40~85°C) CHARACTERISTIC TEST CONDITION [ min | ave. | max | unr] ; | Veep J = Operating Supply Voltage "vec | SSS~d S| — 5 Vpp =24V, when diagnosed, CCRef = 20k. IBB Ve =24V, when not 01 Current Consumption diagnosed . | Vcc =5.25V, when diagnosed | — | 5 | 10] ce Vcc =5.25V, when not diagnosed Input Voltage Vocx - Vv === ; Vin =0V (Pulldown) [— [= [=] IL Vin=0V (Pull-up) [= [50 [=200 | Input Current ; Vin=Vcc (Pull-down) [= [50 [200] ““ IM WWin=Vec ul-up) [= [= [=| a . Vpp=9V, Vcc =4.75V, Ip=1A | — | 06[ 1] | Ry Squib Driver ON-Resistance DS (ON) SQ Vep=9V, Vcc =4.75V, Ip=3A L— [07] 12] a High Side} IOLSQ (H Vi =25V squib Driver Output #9" Si Q(H) [Vout | — | — | 01] ; Vout =Vcc [= [= | 01] Leakage Current Low Side} IOLSQ (L) Vout =25V [-— [=] 1 Diagnostic Amp Amplification Vcc =4.75V, Factor AMPGAIN AMPVCOMM = 3V, 25°C 18 22 Diagnostic Amp Offset Vcc =4.75V, + Voltage AMPOFFSET | MiPVCOMM =3V, 25°C #10 | mv Diagnostic Amp Differential Vcc =4.75V, ISH = 100mA, Input Voltage Range AMPVDEF AMPVCOMM = 3V, 25°C 200 mv Diagnostic Amp In-phase AMPVCOMM 3.0 v Input Voltage Range Diagnostic Amp Output PSAT 1 Saturation Voltage VAMPSA Vec v Source Diagnostic Output Voltage vpingrer RREF=20, ISH=35mA, mV A 1AO = 5A Diagnostic Output Relative VDIAGDEV RSQ =RREF =2, ISH=35mA, -10 % Accuracy 1AO =5yuA 1998-09-11 8/10

CHARACTERISTIC TEST CONDITION [min | t¥e. | max | unr] Diagnostic Voltage Dividing vpIv 0.17 0.23 Ratio Diagnostic Resistance Relative RDEV (Measured between $S1, % Accuracy $Q1-, $$2, $Q2-) Switching Time = [00 [200] (High side SW) [TPH | y,5a26v, Road, ipeaa = P= 1] 0] Switching Time TPLH | — | 10] 50] (Low-side SW) TPHL [ — [10] 50 | High-side Driver | —_[-t20-[250 | iagnose {Diagnosis TOHL [=| 50" [109 | iagnosis = 5 z TDLH Time gnoss other Diagnos [= [30 [60 | (Note) The short diagnosis monitor current in cases when the CCADJ pin is shorted to GND is 100mA (Max) (at all temperatures). (Note) Short diagnosis must be completed within 15ms. 1998-09-11 9/10

SSOP24-P-300-1.00B Unit : mm HARARAAAR AAR e NI O) = o| > ims gg g o| ol 2 1 ij 12 OTYP 0.440.1 ETE Te 13.5MAX 13.040.2 uN x a) =< 1 rye oa o 5 . 770.15] 3 + °o S 0.45:0.2 Weight : 0.29g (Typ.) mss 1998-09-11 10710