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for further information contact your local stmicroelectronics sales office. october 2014 docid027106 rev 1 1/19 L9680 advanced airbag ic for mid/high end applications data brief features ? boost regulator for energy reserve ? 1.882 mhz operation, i load = 70 ma max ? output voltage user selectable, 23 v/ 33 v 5% ? capacitor value & esr diagnostics ? boost regulator for psi-5 sync pulse ? 1.882 mhz operation, ? output voltage, 12 v/14.75 v, user configurable ? buck regulator for remote sensor ? 1.882 mhz operation ? output voltage, 7.2 v/9 v 4%, user configurable ? buck regulator for micro controller unit ? 1.882 mhz operation ? output voltage user selectable, 3.3 v or 5.0 v 3% ? integrated energy reserve crossover switch ?3 - 912 ma max ? switch active output indicator ? battery voltage monitor & shutdown control with wake-up control ? system voltage diagnostics with integrated adc ? squib deployment drivers ? 12 channel hsd/lsd ? 25 v max deployment voltage ? various deployment profiles ? current monitoring ?r measure , stb, stg & leakage diagnostics ? high & low side driver fet tests ? high side safing switch regulator and enable control ? four channel remote sensor interface ? psi-5 satellite sensors ? active wheel speed sensors ? three channel gpo, hsd or lsd configurable, with pwm 0-100% control ? nine channel hall-effect, resistive or switch sensor interface ? user customizable safing logic ? specific disarm signal for passenger airbag ? temporal and algorithmic watchdog timers ? end of life disposal interface ? temperature sensor ? 32 bit spi communications ? 5.5 v minimum operating voltage at device battery pin ? operating temperature, -40 to 95 c ? packaging - 100 pin *$3*36 tqfp100 exposed pad down (14x14x1.0mm) table 1. device summary order code package pacing L9680 tqfp100 tray L9680tr tape & reel www.st.com
contents L9680 2/19 docid027106 rev 1 contents 1 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 operative maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 pin out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5 overview and block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.1 power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.2 deployment drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5.3 remote sensor interfaces (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.4 dc sensor interfaces (9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.5 general purpose outputs (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.6 arming logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5.7 other features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 6 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 7 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
docid027106 rev 1 3/19 L9680 description 19 1 description the L9680 is an advanced airbag system chip solution targeted for mature airbag market and integrated safety markets. this device is family compatible with the l9678 and l9679 devices. safety system integration is enabled through higher power supply currents and integrated active wheel speed sensor interface. the active wheel speed interface is shared with the psi-5 satellite interface to create a generic remote safety sensor interface compliant to both systems. high frequency power supply design allows further cost reduction by using smaller and less expensive external components. all switching regulators operate at 1.882 mhz while buck converters have integrated synchronous rectifiers. additional attention is given to system integrity and diagnostics. the reserve capacitor is electrically isolated from the boost regulator by a 65 ma nominal fixed current source, controlling in-rush an additional capacitor discharge fixed current source is integrated to diagnose the reserve capacitor value and esr. the same current sources can be used to discharge the capacitor at shutdown. thanks to low quiescent current, the device can be directly connected to battery. in this way, the device start-up and shutdown are controlled through the wake-up input function. the power supply and crossover function are controlled automatically through the internal state machine. the user can select both ecu logic voltage (v cc at 3.3 v or 5.0 v) and energy reserve output voltage (at either 23 v or 33 v). deployment voltage is set to a maximum of 25 v for all profiles and can be controlled through external safing switch circuit using the high side safing switch reference enabled through the system spi interface or the arming logic.
absolute maximum ratings L9680 4/19 docid027106 rev 1 2 absolute maximum ratings this part may be irreparably damaged if taken outside the specified absolute maximum ratings. operation above the absolute maximum ratings may also cause a decrease in reliability. the operating junction temperature range is -40 c to +150 c. the maximum junction temperature must not be exceeded except when in deployment and within the deploy power stages. deployment is possible starting with a junction temperature of 150 c. a power dissipation calculation has to be performed for the final application limiting the available functionality to a subset of it in order to respect to the power dissipation capability. table 2. absolute maximum ratings pin# pin name pin function min max unit 1 cs_rs remote spi interface chip select -0.3 vcc+0.3 ? 6.5 v 2 sclk_rs remote spi interface clock -0.3 vcc+0.3 ? 6.5 v 3 mosi_rs remote spi interface data in -0.3 vcc+0.3 ? 6.5 v 4 miso_rs remote spi interface data out -0.3 vcc+0.3 ? 6.5 v 5 reset reset output -0.3 vcc+0.3 ? 6.5 v 6 miso_g global spi interface data out -0.3 vcc+0.3 ? 6.5 v 7 mosi_g global spi interface data in -0.3 vcc+0.3 ? 6.5 v 8 sclk_g global spi interface clock -0.3 vcc+0.3 ? 6.5 v 9 cs_g global spi interface chip select -0.3 vcc+0.3 ? 6.5 v 10 wdt/tm watchdog disable -0.3 20 v 11 sr4 squib 4 low-side pin -0.3 40 v 12 sf4 squib 4 high-side pin -1.0 40 v 13 ss45 squib 4 & 5 deployment supply pin -0.3 40 v 14 sf5 squib 5 high-side pin -1.0 40 v 15 sr5 squib 5 low-side pin -0.3 40 v 16 sr0 squib 0 low-side pin -0.3 40 v 17 sf0 squib 0 high-side pin -1.0 40 v 18 ss01 squib 0 & 1 deployment supply pin -0.3 40 v 19 sf1 squib 1 high-side pin -1.0 40 v 20 sr1 squib 1 low-side pin -0.3 40 v 21 sr8 squib 8 low-side pin -0.3 40 v 22 sf8 squib 8 high-side pin -1.0 40 v 23 ss89 squib 8 & 9 deployment supply pin -0.3 40 v 24 sf9 squib 9 high-side pin -1.0 40 v 25 sr9 squib 9 low-side pin -0.3 40 v 26 dcs8 dc sensor interface channel 8 -2 40 v
docid027106 rev 1 5/19 L9680 absolute maximum ratings 19 27 dcs7 dc sensor interface channel 7 -2 40 v 28 dcs6 dc sensor interface channel 6 -2 40 v 29 dcs5 dc sensor interface channel 5 -2 40 v 30 dcs4 dc sensor interface channel 4 -2 40 v 31 dcs3 dc sensor interface channel 3 -2 40 v 32 dcs2 dc sensor interface channel 2 -2 40 v 33 dcs1 dc sensor interface channel 1 -2 40 v 34 dcs0 dc sensor interface channel 0 -2 40 v 35 rsu0 psi-5/wss ch. 0 remote sensor output -1 40 v 36 rsu1 psi-5/wss ch. 1 remote sensor output -1 40 v 37 rsu2 psi-5/wss ch. 2 remote sensor output -1 40 v 38 rsu3 psi-5/wss ch. 3 remote sensor output -1 40 v 39 gpod0 gpo driver 0 drain output pin -1 40 v 40 gpos0 gpo driver 0 source output pin -1 40 v 41 gpos1 gpo driver 1 source output pin -1 40 v 42 gpod1 gpo driver 1 drain output pin -1 40 v 43 gpod2 gpo driver 2 drain output pin -1 40 v 44 gpos2 gpo driver 2 source output pin -1 40 v 45 covract external crossover switch driver -0.3 40 v 46 vcoremon external regulator monitor -0.3 vcc+0.3 ? 6.5 v 47 mcufaultb active low mcu fault monitoring input -0.3 vcc+0.3 ? 6.5 v 48 satsync initiate satellite sensor sync pulse -0.3 vcc+0.3 ? 6.5 v 49 psinhb active low passenger airbag inhibit control -0.3 vcc+0.3 ? 6.5 v 50 gndsub1 substrate ground / squib ground -0.3 0.3 v 51 srb squib b low-side pin -0.3 40 v 52 sfb squib b high-side pin -1.0 40 v 53 ssab squib a & b deployment supply pin -0.3 40 v 54 sfa squib a high-side pin -1.0 40 v 55 sra squib a low-side pin -0.3 40 v 56 sr3 squib 3 low-side pin -0.3 40 v 57 sf3 squib 3 high-side pin -1.0 40 v 58 ss23 squib 2 & 3 deployment supply pin -0.3 40 v 59 sf2 squib 2 high-side pin -1.0 40 v 60 sr2 squib 2 low-side pin -0.3 40 v 61 sr7 squib 7 low-side pin -0.3 40 v table 2. absolute maximum ratings pin# pin name pin function min max unit
absolute maximum ratings L9680 6/19 docid027106 rev 1 62 sf7 squib 7 high-side pin -1.0 40 v 63 ss67 squib 6 & 7 deployment supply pin -0.3 40 v 64 sf6 squib 6 high-side pin -1.0 40 v 65 sr6 squib 6 low-side pin -0.3 40 v 66 gnda analog ground -0.3 0.3 v 67 saf_cs0 spi interface safing sensor chip select 0 -0.3 vcc+0.3 ? 6.5 v 68 saf_cs1 spi interface safing sensor chip select 1 -0.3 vcc+0.3 ? 6.5 v 69 saf_cs2 spi interface safing sensor chip select 2 -0.3 vcc+0.3 ? 6.5 v 70 saf_cs3 spi interface safing sensor chip select 3 -0.3 vcc+0.3 ? 6.5 v 71 wd2_lockout wd2 fault output -0.3 vcc+0.3 ? 6.5 v 72 ws3 wheel speed output ch3 -0.3 vcc+0.3 ? 6.5 v 73 ws2 wheel speed output ch2 -0.3 vcc+0.3 ? 6.5 v 74 ws1 wheel speed output ch1 -0.3 vcc+0.3 ? 6.5 v 75 ws0 wheel speed output ch0 -0.3 vcc+0.3 ? 6.5 v 76 vccsel vcc select / vcoremon disable input -0.3 40 v 77 acl eol disposal control input -0.3 40 v 78 wakeup wake-up control input -0.3 40 v 79 vbatmon battery line voltage monitor -18 40 v 80 vsf safing regulator supply output -0.3 40 v 81 vin battery connection -0.3 40 v 82 ver reserve voltage -0.3 40 v 83 erboost energy reserve regulator output -0.3 40 v 84 erbstsw er boost switching output -0.3 40 v 85 bstgnd boost regulators ground -0.3 0.3 v 86 syncbstsw sync boost switching output -0.3 40 v 87 syncboost sync boost output voltage -0.3 40 v 88 satbcksw sat buck switching output -0.3 40 v 89 satgnd sat buck regulator ground -0.3 0.3 v 90 satbuck sat buck output voltage -0.3 40 - 91 vccbcksw vcc buck switch output -0.3 40 v 92 vccgnd vcc buck ground -0.3 0.3 v 93 cvdd internal 3.3v regulator output -0.3 4.6 v 94 gndd digital ground -0.3 0.3 - 95 vcc vcc buck voltage -0.3 6.5 v 96 arm1 arming output 1 -0.3 vcc+0.3 ? 6.5 v table 2. absolute maximum ratings pin# pin name pin function min max unit
docid027106 rev 1 7/19 L9680 absolute maximum ratings 19 97 arm2 arming output 2 -0.3 vcc+0.3 ? 6.5 v 98 arm3 arming output 3 -0.3 vcc+0.3 ? 6.5 v 99 arm4 arming output 4 -0.3 vcc+0.3 ? 6.5 v 100 gndsub2 substrate ground / squib ground -0.3 0.3 v - exposed pad down substrate ground / squib ground -0.3 0.3 v table 2. absolute maximum ratings pin# pin name pin function min max unit
operative maximum ratings L9680 8/19 docid027106 rev 1 3 operative maximum ratings within the operating ratings the part operates as specified and without parameter deviations. once taken beyond the operative ratings and returned back within, the part will recover with no damage or degradation. additional supply voltage and temperature conditions are given separately at the beginning of each specification table. table 3. operative maximum ratings pin # pin name pin function min max unit 1 cs_rs remote spi interface chip select -0.1 vcc+0.1 ? 5.5 v 2 sclk_rs remote spi interface clock -0.1 vcc+0.1 ? 5.5 v 3 mosi_rs remote spi interface data in -0.1 vcc+0.1 ? 5.5 v 4 miso_rs remote spi interface data out -0.1 vcc+0.1 ? 5.5 v 5 reset reset output -0.1 vcc+0.1 ? 5.5 v 6 miso_g global spi interface data out -0.1 vcc+0.1 ? 5.5 v 7 mosi_g global spi interface data in -0.1 vcc+0.1 ? 5.5 v 8 sclk_g global spi interface clock -0.1 vcc+0.1 ? 5.5 v 9 cs_g global spi interface chip select -0.1 vcc+0.1 ? 5.5 v 10 wdt/tm watchdog disable -0.1 15 v 11 sr4 squib 4 low-side pin -0.1 ss45 v 12 sf4 squib 4 high-side pin -1.0 ss45 v 13 ss45 squib 4 & 5 deployment supply pin -0.1 ver v 14 sf5 squib 5 high-side pin -1.0 ss45 v 15 sr5 squib 5 low-side pin -0.1 ss45 v 16 sr0 squib 0 low-side pin -0.1 ss01 v 17 sf0 squib 0 high-side pin -1.0 ss01 v 18 ss01 squib 0 & 1 deployment supply pin -0.1 ver v 19 sf1 squib 1 high-side pin -1.0 ss01 v 20 sr1 squib 1 low-side pin -0.1 ss01 v 21 sr8 squib 8 low-side pin -0.1 ss89 v 22 sf8 squib 8 high-side pin -1.0 ss89 v 23 ss89 squib 8 & 9 deployment supply pin -0.1 ver v 24 sf9 squib 9 high-side pin -1.0 ss89 v 25 sr9 squib 9 low-side pin -0.1 ss89 v 26 dcs8 dc sensor interface channel 8 -1 18 v 27 dcs7 dc sensor interface channel 7 -1 18 v
docid027106 rev 1 9/19 L9680 operative maximum ratings 19 28 dcs6 dc sensor interface channel 6 -1 18 v 29 dcs5 dc sensor interface channel 5 -1 18 v 30 dcs4 dc sensor interface channel 4 -1 18 v 31 dcs3 dc sensor interface channel 3 -1 18 v 32 dcs2 dc sensor interface channel 2 -1 18 v 33 dcs1 dc sensor interface channel 1 -1 18 v 34 dcs0 dc sensor interface channel 0 -1 18 v 35 rsu0 psi-5/wss ch. 0 remote sensor output -1 v rsu_sync_max v 36 rsu1 psi-5/wss ch. 1 remote sensor output -1 v rsu_sync_max v 37 rsu2 psi-5/wss ch. 2 remote sensor output -1 v rsu_sync_max v 38 rsu3 psi-5/wss ch. 3 remote sensor output -1 v rsu_sync_max v 39 gpod0 gpo driver 0 drain output pin -0.1 40 v 40 gpos0 gpo driver 0 source output pin -1 40 v 41 gpos1 gpo driver 1 source output pin -1 40 v 42 gpod1 gpo driver 1 drain output pin -0.1 40 v 43 gpod2 gpo driver 2 drain output pin -0.1 40 v 44 gpos2 gpo driver 2 source output pin -1 40 v 45 covract external crossover switch driver -0.1 40 v 46 vcoremon external regulator monitor -0.1 vcc+0.1 ? 5.5 v 47 mcufaultb active low mcu fault monitoring input -0.1 vcc+0.1 ? 5.5 v 48 satsync initiate satellite sensor sync pulse -0.1 vcc+0.1 ? 5.5 v 49 psinhb active low passenger airbag inhibit control -0.1 vcc+0.1 ? 5.5 v 50 gndsub1 substrate ground / squib ground -0.1 0.1 v 51 srb squib b low-side pin -0.1 ssab v 52 sfb squib b high-side pin -1.0 ssab v 53 ssab squib a & b deployment supply pin -0.1 ver v 54 sfa squib a high-side pin -1.0 ssab v 55 sra squib a low-side pin -0.1 ssab v 56 sr3 squib 3 low-side pin -0.1 ss23 v 57 sf3 squib 3 high-side pin -1.0 ss23 v 58 ss23 squib 2 & 3 deployment supply pin -0.1 ver v 59 sf2 squib 2 high-side pin -1.0 ss23 v 60 sr2 squib 2 low-side pin -0.1 ss23 v 61 sr7 squib 7 low-side pin -0.1 ss67 v table 3. operative maximum ratings (continued) pin # pin name pin function min max unit
operative maximum ratings L9680 10/19 docid027106 rev 1 62 sf7 squib 7 high-side pin -1.0 ss67 v 63 ss67 squib 6 & 7 deployment supply pin -0.1 ver v 64 sf6 squib 6 high-side pin -1.0 ss67 v 65 sr6 squib 6 low-side pin -0.1 ss67 v 66 gnda analog ground -0.1 0.1 v 67 saf_cs0 spi interface safing sensor chip select 0 -0.1 vcc+0.1 ? 5.5 v 68 saf_cs1 spi interface safing sensor chip select 1 -0.1 vcc+0.1 ? 5.5 v 69 saf_cs2 spi interface safing sensor chip select 2 -0.1 vcc+0.1 ? 5.5 v 70 saf_cs3 spi interface safing sensor chip select 3 -0.1 vcc+0.1 ? 5.5 v 71 wd2_lockout wd2 fault output -0.1 vcc+0.1 ? 5.5 v 72 ws3 wheel speed output ch3 -0.1 vcc+0.1 ? 5.5 v 73 ws2 wheel speed output ch2 -0.1 vcc+0.1 ? 5.5 v 74 ws1 wheel speed output ch1 -0.1 vcc+0.1 ? 5.5 v 75 ws0 wheel speed output ch0 -0.1 vcc+0.1 ? 5.5 v 76 vccsel vcc select / vcoremon disable input -0.1 35 v 77 acl eol disposal control input -0.1 35 v 78 wakeup wake-up control input -0.1 vin v 79 vbatmon battery line voltage monitor -1 18 v 80 vsf safing regulator supply output -0.1 27 v 81 vin battery connection -0.1 35 v 82 ver reserve voltage -0.1 35 v 83 erboost energy reserve regulator output -0.1 35 v 84 erbstsw er boost switching output -0.1 35 v 85 bstgnd boost regulators ground -0.1 0.1 v 86 syncbstsw sync boost switching output -0.1 35 v 87 syncboost sync boost output voltage -0.1 35 v 88 satbcksw sat buck switching output -0.1 35 v 89 satgnd sat buck regulator ground -0.1 0.1 v 90 satbuck sat buck output voltage -0.1 10 - 91 vccbcksw vcc buck switch output -0.1 10 v 92 vccgnd vcc buck ground -0.1 0.1 v 93 cvdd internal 3.3v regulator output -0.1 3.6 v 94 gndd digital ground -0.1 0.1 - 95 vcc vcc buck voltage -0.1 5.5 v table 3. operative maximum ratings (continued) pin # pin name pin function min max unit
docid027106 rev 1 11/19 L9680 operative maximum ratings 19 96 arm1 arming output 1 -0.1 vcc+0.1 ? 5.5 v 97 arm2 arming output 2 -0.1 vcc+0.1 ? 5.5 v 98 arm3 arming output 3 -0.1 vcc+0.1 ? 5.5 v 99 arm4 arming output 4 -0.1 vcc+0.1 ? 5.5 v 100 gndsub2 substrate ground / squib ground -0.1 0.1 v - exposed pad down substrate ground / squib ground -0.1 0.1 v table 3. operative maximum ratings (continued) pin # pin name pin function min max unit
pin out L9680 12/19 docid027106 rev 1 4 pin out the L9680 pin out is shown below. the ic is housed in a 100 pin package (14 x 14 x 1.0mm) with a 7.6 x 7.6 mm exposed pad down. figure 1. pin connection diagram (top view) the exposed pad is electrically shorted to the substrate pins gndsub1 and gndsub2. these three connection nodes are to be kept shorted on the application. *$3*36 &6b56 6&/.b56 026,b56 0,62b56 5(6(7 0,62b* 026,b* 6&/.b* &6b* :'770 65 6) 66 6) 65 65 6) 66 6) 65 65 6) 66 6) 65 :6 :6 :6 :6 :'b/rfn2xw 6$)b&6 6$)b&6 6$)b&6 6$)b&6 *1'$ 65 6) 66 6) 65 65 6) 66 6) 65 65$ 6)$ 66$% 6)% 65% *1'68% 36,1+% 6$76<1& 0&8)$8/7% &295$&7 *326 *32' *32' *326 *326 *32' 568 568 568 568 '&6 '&6 '&6 '&6 '&6 '&6 '&6 '&6 '&6 9&25(021 *1'68% $50 $50 $50 $50 9&& *1'' &9'' 9&&*1' 9&&%&.6: 6$7%&. 6$7*1' 6$7%&.6: 6<1&%2267 6<1&%676: %67*1' (5%676: (5%2267 9(5 9,1 96) 9%$7021 :$.(83 $&/ 9&&6(/ ([srvhgsdggrzq
docid027106 rev 1 13/19 L9680 overview and block diagram 19 5 overview and block diagram the L9680 ic is an application specific standard component air bag system chip. its main functions include, power management, deployment drivers, remote sensor interfaces (psi-5 satellite sensors or active wheel speed sensors), diagnostics, deployment arming, hall- effect sensor interface, general purpose output drivers, watchdog timer, microcontroller failsafe input and control and a dedicated passenger airbag disarm signal. a block diagram for this ic is shown in figure 2 . figure 2. device function block diagram *$3*36 (5%rrvw5hjxodwru 99 6<1&%rrvw 5hjxodwru 9 6$7%xfn5hjxodwru 9 (qhuj\5hvhuyh &urvvryhu&rqwuro 9&&%xfn5hjxodwru 99 (5&$3'ldjqrvwlfv dqg &kdujh&rqwuro 5hprwh6hqvru ,qwhuidfh 'hsor\phqw'ulyhuv &rqiljxudeoh *hqhudo3xusrvh 2xwsxw'ulyhuv '&6hqvru ,qwhuidfh :dnhxs 3rzhu0rglqj &rqwuro *oredo&rqiljxudwlrq &rqwuro 5hprwh6hqvru &rqiljxudwlrq &rqwuro $uplqj6fudsslqj &38,qwhjulw\0rqlwru :dwfkgrj ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; :$.(83 9,1 &295$&7 (5%676: (5%2267 9(5 6<1&%676: 6 <1&%2267 6$7%&.6: 6$7%8&. 6$7*1' 9&&%&.6: 9&& 9&&%&.*1' 026,b* 0,62b* &6b* 6&/.b* 026,b56 0,62b56 &6b56 6&/.b56 6$)b&6 $50 $50 $50 *32' *326 *32' *326 *32' *326 '& '& ; ; ; 0&8)$8/7% %ldv'ldjqrvwlfv $'& ; ; ; 568 ; 568 568 568 ; ; ; ; ; ; ; ; ?? 66$% 6) 65 ; ; ; ; ; ; 6)% 65% ??? ; %67*1' ; $&/ +665(* ; 96) 6$76<1& ; ; 9&&6(/ ; ; 5(6(7 ; ; ; ; *1'$ *1'' ; ; :6 :6 :6 :6 ; ; *1'68% ([srvhg3dg 6$)b&6 6$)b&6 6$)b&6 ; &9'' ; 36,+1% ; 9%$7021 ; 9&25(021 ??? 66 ; $50 ; :'b/2&.287 *1'68% ([srvhg3dg ; :'770
overview and block diagram L9680 14/19 docid027106 rev 1 5.1 power supply ? integrated 1.882 mhz boost regulator, 33 v 5% or 23 v 5% nominal output ? integrated 1.882 mhz boost regulator,12 v/14.75 v nominal output, user selectable via spi command ? integrated 1.882 mhz synchronous buck regulator, 7.2 v/9 v 4% nominal output, user selectable via spi command ? integrated 1.882 mhz synchronous buck regulator, 5 v 3% or 3.3 v 3% nominal output, user selectable via vccsel pin ? over and under voltage detection and shutdown for all regulators ? under-voltage lockout to guarantee buck regulator outputs disabled and discharged ? integrated energy reserve capacitor fixed constant current source (65 ma, nominal) switch for controlled inrush and charge characteristics ? integrated energy reserve diagnostics, capacitor value and esr ? integrated energy reserve crossover switch with current limit and battery input voltage monitoring ? crossover switch ?active? output signal ? integrated 25 v/20 v spi selectable linear regulator for high side safing fet gate supply enabled via spi or arming logic ? reset output 5.2 deployment drivers ? 12 high side deployment drivers, 12 low side deployment drivers ? user programmable deployment options ? 1.20 a or 1.75 a minimum ? programmable time in 0.1ms increments ? capability to deploy a squib with a minimum current of 1.2 / 1.75 a and the low side fet shorted to ground up to 25 v on ssxy ? independently-controlled high-side and low-side fets ? squib resistance measurement ? firing current monitor feature ? high and low side fet tests ? open & shorts diagnostics, including between loop drivers ? independent fire enable logic, spi and discrete digital input
docid027106 rev 1 15/19 L9680 overview and block diagram 19 5.3 remote sensor interfaces (4) ? quad channel receiver, user selectable ? standard psi-5 v1.3 compatible with sync pulse or ? active wheel speed sensors ? high side drivers for active wheel speed sensor mode (with driver protection) ? current limit with short circuit protection diagnostics ? psi-5 satellite sensor mode ? auto-adjusting current trip points for each satellite channel ? even parity, 8 or 10 bit messages, 125k or 189kbps ? satellite message error detection ? active wheel speed sensor mode ? standard active dual level sensors, 7ma/14ma ? three level sensors with direction and air gap data, 7ma/14ma/28ma ? pwm encoded two level sensor, 2 edges/tooth ? pwm encoded two level sensor, 1 edge/tooth ? standard active two and three level sensor data decoding available through spi 5.4 dc sensor interfaces (9) ? nine integrated switch interfaces with current sense capability ? compatible with hall-effect, resistive and switch sensors ? current limit protected ? system dedicated path to disable the passenger airbag with input from dc sensor interface 5.5 general purpose outputs (3) ? three configurable high-side or low-side drivers ? on-off mode and pwm 0-100% fine control ? diagnostics for short circuit protection and open load detection ? current limit and reverse battery protected 5.6 arming logic ? user configurable safing algorithms with 16 safing records ? four digital sensor interfaces through spi ? independent user programmable thresholds ? independent user programmable latch timers ? four discrete and independent arming logic outputs ? four discrete and independent internal arming signals ? end-of-life interface
overview and block diagram L9680 16/19 docid027106 rev 1 5.7 other features ? one dedicated 32-bit spi bus for global configuration and control ? one dedicated 32-bit spi bus for remote sensor configuration and control ? microcontroller ?state of health? input and control function ? integrated watchdog control with 2 independent structures: windowed wd and algorithmic wd ? temperature sensor ? independent thermal shutdown protection on the er boost switch, the sync boost switch, the energy reserve crossover switch, the energy reserve charge paths, the remote sensor interfaces and the general purpose outputs ? all diagnostics are digital and are available through spi communications configurable logic operation, 5 v or 3.3 v
docid027106 rev 1 17/19 L9680 package information 19 6 package information in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark. figure 3. tqfp100 mechanical data and package dimensions *$3*36 & iruhdfkghylfhdssolfdwlrq vljqsdgvl]h(qgxvhuvkrxogyhuli\3'dqg3(glphqvlrqv 7khvl]hrih[srvhgsdglvyduldeohghshqglqjriohdgiudph gh ([srvhgsdggrzq 74)3[[pp fff n / / h ( ( ( ( ' ' ' ' f e $ $ $ ',0 0,1 7<3 pp 0$; 0,1 7<3 lqfk 0$; 0(&+$1,&$/'$7$ 287/,1($1'
revision history L9680 18/19 docid027106 rev 1 7 revision history table 4. document revision history date revision changes 28-oct-2014 1 initial release.
docid027106 rev 1 19/19 L9680 19 important notice ? please read carefully stmicroelectronics nv and its subsidiaries (?st?) reserve the right to make changes, corrections, enhancements, modifications, and improvements to st products and/or to this document at any time without notice. purchasers should obtain the latest relevant in formation on st products before placing orders. st products are sold pursuant to st?s terms and conditions of sale in place at the time of o rder acknowledgement. purchasers are solely responsible for the choice, selection, and use of st products and st assumes no liability for application assistance or the design of purchasers? products. no license, express or implied, to any intellectual property right is granted by st herein. resale of st products with provisions different from the information set forth herein shall void any warranty granted by st for such product. st and the st logo are trademarks of st. all other product or service names are the property of their respective owners. information in this document supersedes and replaces information previously supplied in any prior versions of this document. ? 2014 stmicroelectronics ? all rights reserved

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