L9959 datasheet(19/49 Pages) STMICROELECTRONICS

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L9959

Electrical specifications

Table 15. Current limiting

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

|ICL2|(1)

Current limit2

RCF = 5.1 kΩ

4.25

5.75

|ICL3|(1)

Current limit3

5.6

6.6

7.6

|ICL4|(1)

Current limit4

7.3

8.6

9.9

|IHYS2-4|(1) Current limit hysteresis1

-5%

ICL2-4

-10%

ICL2-4

Blanking time

Guaranteed through

scan.

μs

ttrans

Time between two transient

130

μs

1. Programmable current levels see Table 34 Current Level (CONFIG_REG). Measured using a 5.1 kΩ resistor between CF

and GND (RCF).

Table 16. Over-current detection (8 V < VS < 18 V)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

|IOC2_LSI(1)

Low side over current

threshold2

VDD = 5 V

4.9

8.2

|IOC3_LS|(1)

Low side over current

threshold3

VDD = 5 V

6.7

11.1

|IOC4_LS|(1)

Low side over current

threshold4

VDD = 5 V

8.4

|IOC2_HSI(1)

High side over current

threshold2

VDD = 5 V

5.5

9.2

|IOC3_HS|(1)

High side over current

threshold3

VDD = 5 V

6.9

11.5

|IOC4_HS|(1)

High side over current

threshold4

VDD = 5 V

8.6

14.4

ITRACK-2(2) |IOC2| - |ICL2|

VDD = 5 V

0.4

5.5

ITRACK-3(2) |IOC3| - |ICL3|

VDD = 5 V

0.4

5.5

ITRACK-4(2) |IOC4| - |ICL4|

VDD = 5 V

0.4

5.5

tDF

Delay time for fault detection

guaranteed by design

4.5

μs

tDF_off

Switch-off delay time

μs

tDF_del

Delayed switch-off time

200

μs

tSC

Short-circuit detection

guaranteed through scan

292

350

413

μs

1. Programmable current levels see Table 34 Current Level (CONFIG_REG).

2. Tracking values are referred for both LS and HS.

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