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L9679P Datasheet(PDF) 247 Page - STMicroelectronics |
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L9679P Datasheet(HTML) 247 Page - STMicroelectronics |
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247 / 272 page  DocID029275 Rev 1 247/272 L9679P Electrical characteristics 271 17.17 Deployment driver diagnostic 17.17.1 Squib resistance measurement All electrical characteristics are valid for the following conditions unless otherwise noted: -40 °C Ta +95 °C, VINGOOD0(max) VIN 35 V, 6 V SSxy 35 V, 7 V SYNCBOOST 35 V. Table 57. Deployment drivers diagnostics - Squib resistance measurement No Symbol Parameter Conditions Min Typ Max Unit 1RSQ_RANGE_1 Squib resistance range 1 LPDIAGREQ(ISRC_CURR_ SEL) = 0 0 - 10.0 Ω 2RSQ_RANGE 2 Squib resistance range 2 LPDIAGREQ(ISRC_CURR_ SEL) = 1 0 - 50.0 Ω 3GRSQ Squib resistance measurement Differential amplifier gain VOUT_RSQ = GRSQ x [(VSF - VSR)] + Voff_RSQ -2% 5.2 +2% V/V 4Voff_RSQ Squib resistance measurement Differential amplifier offset VOUT_RSQ = GRSQ x [(VSF – VSR)] + Voff_RSQ 200 - 400 mV 5 ISRC_HI_SF ISRC_HI_SR Squib resistance measurement High current source LPDIAGREQ(ISRC_CURR_ SEL) = 0 LPDIAGREQ(ISRC) = ‘01’ or ‘10’ -5% 40 +5% mA 6 ISRC_LO_SF ISRC_LO_SR Squib resistance measurement Low current source LPDIAGREQ(ISRC_CURR_ SEL) = 1 LPDIAGREQ(ISRC) =’01’ or ‘10’ -10% 8 +10% mA 7ISRC_DELTA Squib Resistance Measurement Delta Current Source ISRC_HI_x - ISRC_LO_x -5% 32 +5% mA 8SRISRC Squib resistance measurement current source slew-rate - 3 7.5 12 mA/μs 9VSRx_RM SRx voltage during resistance measurement LPDIAGREQ(ISRC)=”01” or “10” LPDIAGREQ(ISINK)=1 0.4 0.7 1.2 V 10 ISINK_HI_SR SRx current sink limit high LPDIAGREQ(ISRC_CURR_ SEL) = 0 LPDIAGREQ(ISINK) = 1 50 75 100 mA 11 ISINK_LO_SR SRx current sink limit low LPDIAGREQ(ISRC_CURR_ SEL) = 1 LPDIAGREQ(ISINK) = 1 10 17.5 25 mA 12 IPD_SR_L SRx current pull down SYS_CTL(PD&VRCM_SEL) = 0 0.7 1 1.3 mA 13 IPD_SR_H SYS_CTL(PD&VRCM_SEL) = 1 4.5 6 7.5 mA 14 RLKG_SF SFx leakage resistance Design info 1 - - kΩ |
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