L9678P datasheet(191/215 Pages) STMICROELECTRONICS

191 / 215 page

DS11626 Rev 9

191/216

L9678P, L9678P-S

Electrical characteristics

214

Figure 60. Deployment drivers diagram

2. LDEPL could be calculated in the following way:

- Non-ClockSpring Loops

LDEPL(max) = LWire(10m*2) + LEMI = (3.6 µH/m * 10m) + 7.7 µH = 43.7 µH

- ClockSpring Loops

LDEPL(max) = LWire(3m*2) + LCSx + LEMI = (3.6µH/m * 3m) + [42.9 µH * (1 - 0.739)] + 7.7 µH = 29.7 µH

- ClockSpring Loops with short to ground

LDEPL(max) = LWire(3m) + LCSx + LEMI = (1.8µH/m * 3m) + 42.9µH + 7.7µH = 56 µH.

GAPGPS01153

ESD/EMI Protection

Squib EMI

Protection

Squib Load

R_Squib

L_EMI

L_CS1

R_CS1

L_CS2

R_CS2

Clock Spring

Impedance

System Wiring Impedance

R_Wire 1

Wire Lenght (m)

kL_CSX

L_Wire 1

R_Wire 2

L_Wire 2

C_SFx

SFx

SRx

C_SRx

Table 48. Deployment drivers - AC specifications

N°

Symbol

Parameter

Condition

Min.

Typ.

Max. Unit

TDEPL_LO

Deployment time

1.209 A rising to 1.209 A

falling

2.268 ms

TDEPL_HI

1.764 A rising to 1.764 A

falling

0.7

0.832 ms

0.5

0.613 ms

TDEP_RES

Deployment current counter

resolution

µs

TRISE_IDEPL

Rise time

10% - 90% of IDEPL

SSxy = 25 V; RSQ = 2.2 Ω,

C = 22 nF, L = 44 µH

µs

TDEL_IDEP

Delay time

SPI_CS to 90% IDEPL

µs

TFALL_IDEPL

Fall time

90% - 10% IDEPL

µs

TDEL_SD-LS

Low-side shutdown delay time

(with respect to high-side

deactivation)

µs

L9678P Datasheet(PDF) 191 Page - STMicroelectronics

L9678P Datasheet(HTML) 191 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL