L9679P datasheet(238/279 Pages) STMICROELECTRONICS

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Electrical characteristics

L9679P

238/279

DS11627 Rev 7

18.11

COVRACT

All electrical characteristics are valid for the following conditions unless otherwise noted:

-40 °C  Ta  +95 °C, VINGOOD0  VIN  35 V; VINGOOD(max)  VIN  35 V;

VCCx(min)  VCCx  VCCx(max); VCC = 3.3 V or 5 V

18.12

SYNCBOOST converter

All electrical characteristics are valid for the following conditions unless otherwise noted:

-40 °C  Ta  +95 °C, VINGOOD0  VIN  VINSYNC_DIS_X(min)

Table 42. ER Switch AC specifications

Symbol

Parameter

Conditions

Min

Max

Unit

TON_ERSW

ER turn-on time (time to

reach either RDSON_ERSW or

ILIM_ERSW)

CVIN = 10 µF

µs

TFLT_TSD_ERSW Thermal shutdown filter time -

µs

TBLK_ERSW

ER switch activation

blanking time after thermal

shutdown

Table 43. COVRACT DC specifications

Symbol

Parameter

Conditions

Min Typ Max Unit

VOH_COVRACT

COVRACT output voltage

ILOAD = -0.5 mA

VCC

-0.6

VCC

VOL_COVRACT

ILOAD = 2.0 mA

0.4

IREV_COVRACT

Reverse current short high

voltage

COVRACT = 40 V

VCC = 3.3 V

Table 44. COVRACT AC specifications

Symbol

Parameter

Conditions

Min Typ Max Unit

TRISE_COVRACT Rise time

50 pF load, 20%-80%

1.00

µs

TFALL_COVRACT Fall time

50 pF load, 20%-80%

1.00

µs

Table 45. SYNCBOOST converter DC specifications

Symbol

Parameter

Conditions

Min

Typ

Max Unit

VO_SYNCBST

SYNCBOOST output

voltage

Across all line and load,

steady state

SYS_CTL(SYBST) = 0

11.40

Across all line and load

(steady state)

SYS_CTL(SYBST) = 1

14.00 14.75

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