L9779WD datasheet(58/170 Pages) STMICROELECTRONICS

58 / 170 page

Functional description

L9779WD

58/170

DocID027452 Rev 5

6.9.2

LSb function OUT6, 7 (O2 heater)

Figure 34. LSb function OUT6, 7 (O2 heater)

LSb functionality description

LSb are 2 protected low-side drivers with diagnosis and over current protection circuit.

They are driven via MicroSecond Channel interface.

The turn on/off time is fixed and the slew-rate is controlled.

When an over current fault occurs, the driver switches off with faster slew rate in order to

reduce the power dissipation.

The turn on/off time is fixed and the slew-rate is controlled.

Max Cload = 20 nF.

Table 22. LSb electrical characteristics

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

OUT 6, 7

RDS-on LSb

Drain source resistance

T = -40°C, Iload = 3 A

0.05

0.16

Ω

T = 25°C, Iload = 3 A

0.13

0.23

Ω

T = 130°C, Iload = 3 A

0.21

0.47

Ω

IOUTlk

Output leakage current

µA

VS/R

Voltage S/R on/off

R = 4.5 Ω, C = 10 nF

From 80% to 30% of VOUT

0.5

2.5

V/µs

VS/R GateKill

FAST VR/S off when an

OVC fault happens

Load: 8 Ω, 10 nF

From 80% to 30% of VOUT

V/µs

TTurn-on_ LSb

Turn-on delay time

From command to 80% VOUT

Load: 4.5 Ω, 10 nF

7.5

µs

TTurn-off_ LSb

Turn-off delay time

From command to 20% VOUT

Load: 4.5 Ω, 10 nF

7.5

µs

Vcl

Output clamping voltage Iload = 1.5 A

PWclampSP

Clamp single pulse ATE

test

Iload = 1.5 A; single pulse

L9779WD Datasheet(PDF) 58 Page - STMicroelectronics

L9779WD Datasheet(HTML) 58 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