L9341 datasheet(7/10 Pages) STMICROELECTRONICS

7 / 10 page

Bit Nr.

Name

Contents

F11

COMP1 State at Positive Edge of PWM1 (0: Vout1 >Vflyth;1: Vout1 <Vflyth)

F12

COMP2 State at Negative Edge of PWM1 (1: Vout1 >Voffth;0 :Vout1 <Vofth)

F21

COMP1 State at Positive Edge of PWM2 (0: Vout2 >Vflyth;1: Vout2 <Vflyth)

F22

COMP2 State at Negative Edge of PWM2 (1: Vout2 >Vofth;0 : Vout2 <Vofth)

F31

COMP1 State at Positive Edge of PWM3 (0: Vout3 >Vflyth;1: Vout3 <Vflyth)

F32

COMP2 State at Negative Edge of PWM3 (1: Vout3 >Voffth;0 :Vout3 <Vofth)

F41

COMP1 State at Positive Edge of PWM4 (0: Vout4 >Vflyth;1: Vout4 <Vflyth)

F42

COMP2 State at Negative Edge of PWM4 (1: Vout4 > Voffth;0 : Vout4 <Vofth)

RES1

Logic State of RES1 Input (0: RES1 = L ; 1: RES1 = H)

RES2

Logic State of RES2 Input (0: RES2 = L ; 1: RES2 = H)

TSDF

Thermal Diagnostic Flag ( 0: Overtemperature ; 1:Normal )

Current at Negative Edge of PWM1 ( 0: Iout >Ioutl ;1: Iout <Ioutl)

Current at Negative Edge of PWM2 ( 0: Iout >Ioutl ;1: Iout <Ioutl)

Current at Negative Edge of PWM3 ( 0: Iout >Ioutl ;1: Iout <Ioutl)

Current at Negative Edge of PWM4 ( 0: Iout >Ioutl ;1: Iout <Ioutl)

Framing Information (always 1)

Figure 7: Diagnostic Information from QLSD to Microcontroller.

PWM

V OUT

PWM

OUT

I D

dPO

PWMON

min

Sample point COMP2

Sample point COMP1

dPO

PWMOFF

min

Sample point COMP2

Sample point COMP1

Fig.1

Fig.2

Figure 8.

Fig. A

Fig. B

Note:

For safty diagnostic take notice of the following conditions:

tPWMON

≥ tdPOMAX +tC +tV (see Fig. A)

SOCMIN

Voutfmax

SOVMIN

tPWMOFF

≥ tdPOMAX +tV (see Fig. B)

L9341

7/10

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