L9959S datasheet(14/43 Pages) STMICROELECTRONICS

14 / 43 page

Electrical specifications

L9959S, L9959T

14/43

DocID023416 Rev 6

3.5

Outputs OUT1 and OUT2

Table 10. Undervoltage shutdown

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VUV_OFF

VS UV threshold

VS decreasing

3.1

3.8

4.5

VUV_ON

VS UV threshold

VS increasing

3.3

4.0

4.7

VUV_HYS

VS UV hysteresis

VUV_ON - VUV_OFF

0.1

tFUV

VS UV detection time

1.5

µs

Table 11. On-resistance (4.5 V < VS < 28 V)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

rONVS

OUT1,2

On-resistance to supply

VDD = 5 V; VS = 10 V,

IOUT1,2 = 3 A

315



rONGND

OUT1,2

On-resistance to PGND

VDD = 5 V; VS = 10 V,

IOUT1,2 = 3 A

225



ILEAK

Switched-off output current of

OUT1,2

VDD = 5 V; VS = 13 V;

VOUT = 0 V

-200

µA

VDD = 5 V; VS = 13 V;

VOUT = VS

200

µA

Table 12. Power output switching times (8 V < VS < 18 V)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

td ON

Output delay time driver on

µs

td OFF

Output delay time driver off

µs

td dis

(1)

Disable delay time

Guaranteed through

scan.

12.5

µs

td pwon

Power-on delay time

td en

Enable delay time

µs

dIOUT/dt

Current slew rate

1.6

A/µs

dVOUTHS/dt

(2)

Output rise/fall slew-rate high-side

low selected with bit SR = 0

fast selected with bit SR = 1

VDD = 5 V; VS = 14 V

RLOAD1,2 = 2.6  (8 VS),

 (18 V

0.975

2.8

-2.7

V/µs

dVrOUTLS/dt

(2)

Output rise slew-rate low-side

valid only after the toggling of DIR

input

0.975

2.7

V/µs

dVfOUTLS/dt

(2)

Output fall slew-rate low-side

2.5

V/µs

fpwmmax

PWM input frequency

kHz

Driven by /ABE or DIS input.

The slew-rates (dVOUT/dt1) are defined by dV (voltage difference 20% - 80% ) divided by the rise-/fall times (tr/tf see

Figure 5: Output rise and fall times).

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