L9374TRLF datasheet(14/80 Pages) STMICROELECTRONICS

14 / 80 page

Electrical specifications

L9374LF

14/80

DocID025414 Rev 1

3.3.3

Freewheeling diode

3.3.4

Output timing characteristics

The DMOS outputs have controlled slopes to minimize EME. The Edge Shaping option is

programmed via SPI (See Edge shaping (EDGE_SH); without edge shaping, the slope is

fixed to 10V/μs in both directions.

Figure 5. Output timing characteristics diagram with edge shaping

Where:



VD: Valve supply voltage



VFD: Forward voltage drop across the recirculation diode



VEDGE: Voltage Sf to Ss slope transition



Ss: Slow slope



Sf: Fast slope

Table 8. Freewheeling diode electrical characteristics

Symbol

Parameter

Condition

Min.

Typ.

Max.

Unit

VFD1/2

Forward voltage of free

wheeling diodes D1 / D2

IFD = -1.5 A

0.5

0.75

1.75

VFD3/4

Forward voltage of free

wheeling path

D3, D4 @-250 mA

0.5

1.0

1.5

D3, D4 @-1.8 A

1.6

3.6

Rsense

Q3/Q4 Sense resistor

Calculated:

(VFD_1.8A-VFD_250mA)/1.55 A

-1-

RD1/3

Resistor D13-Pin

VQ < VD < 18 V

(Typ @ Tj = 25 °C)

100

240

700

kΩ

Ileak_Dx_0

Leakage current into Dx-Pin

D13

EN = 0

160

μA

Ileak_Dx_1/0

Leakage current into Dx-Pin

D13 D24

EN = 1

IDAC = 0A

400

μA

Ileak_Dx_1/1.8

Leakage current into Dx-Pin

D13 D24

EN = 1

IDAC = 1.8A

2400

μA

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