UM1557 datasheet(7/111 Pages) STMICROELECTRONICS

7 / 111 page

UM1557

List of figures

Doc ID 023521 Rev 2

7/111

Figure 49.

Block diagram of the L99PD08/AMICO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Figure 50.

Application example of AMICO with M0-5T HSDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Figure 51.

Generation of PWM signals by the AMICO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Figure 52.

Behaviour of the LHOMEN signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Figure 53.

Control of the HSDs’ inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Figure 54.

State of the HSDs’ outputs while the AMICO is in limp home mode. . . . . . . . . . . . . . . . . . 80

Figure 55.

Simplified diagram on the on-board diagnostic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Figure 56.

Example of overload failure reporting in PWM operation . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Figure 57.

Example of overload failure reporting in PWM conditions . . . . . . . . . . . . . . . . . . . . . . . . . 82

Figure 58.

Inrush blanking time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Figure 59.

HSD output current if the duration of the power limitation is longer than the inrush blanking

time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Figure 60.

Output current of a HSD driving a cold bulb without blanking time. . . . . . . . . . . . . . . . . . . 85

Figure 61.

Dynamic control of the FR_Stby pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Figure 62.

No new activation while Fr_Stby is High. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Figure 63.

FR_Stby is High during the activation of the power limitation . . . . . . . . . . . . . . . . . . . . . . 91

Figure 64.

Plot of output current and AMICO’s fault pin. FR_Stby is high during the activation of the pow

er limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 65.

Plot of output current and AMICO’s fault pin (zoom of Figure 64). FR_Stby is High during the

activation of the power limitation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 66.

Principle of the direct current sense reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Figure 67.

Behaviour of the Synch_Mux signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Figure 68.

Probability density function of a gaussian distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Figure 69.

Recommendations for series resistors between the AMICO and the microcontroller. . . . . 99

Figure 70.

Distortion of the SPI signal by a too high series resistor . . . . . . . . . . . . . . . . . . . . . . . . . 100

Figure 71.

Effect of an ISO pulse 1 on Vcc, if no load is connected to any HSD sharing the same supply

line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Figure 72.

Effect of an ISO pulse 1 on Vcc with at least one connected load to one of the outputs of the

HSDs, sharing the same supply line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Figure 73.

Positive ISO pulses on the supply of monolithic devices are not transferred to IN, FR_Stby

and CS pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Figure 74.

Recommended external components between a monolithic HSD and the AMICO . . . . . 102

Figure 75.

Negative ISO pulses on the supply of the hybrid HSD are not transferred to IN, FR_Stby or

CS pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Figure 76.

Positive ISO pulses on the supply of the hybrid HSD are not transferred to IN, FR_Stby or CS

pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Figure 77.

Recommended external components between a hybrid HSD and an AMICO . . . . . . . . . 104

Figure 78.

Verification of the correct activation of a monolithic HSD, despite the voltage drop across the

series resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Figure 79.

Recommended external components between a monolithic HSD and the AMICO to with. . .

stand a reverse battery condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

Figure 80.

Recommended external components between a monolithic HSD and the AMICO . . . . . 107

Figure 81.

Recommendations for pull-up resistors, pull-down resistors and decoupling capacitors . 108

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