SC493 datasheet(4/28 Pages) SEMTECH

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SC493

Electrical Characteristics (continued)

Parameter

Symbol

Condition

Min

Typ

Max

Units

Startup

Initialization Time (2)

INIT

Delay before the I2C bus and the Power-on

delay ramp are enabled

Soft-Start Time Accuracy

-20

+20

Power-on Delay Time Accuracy

DLY

-20

+20

Powersave

Zero-Crossing Detector Threshold

LX - PGND

-3

UPSV mode Frequency

UPSV

UPSV enabled, UPSV1 = 1, UPSV0 = 1

kHz

Power Good

PGD Rising Threshold

PGD_RISE

FB with respect to set point, under voltage,

and over voltage

90/120

PGD Falling Threshold

PGD_FALL

FB with respect to set point, under voltage,

and over voltage

80/110

PGD Leakage

ILEAK

PGD

Device operating, no fault, V

PGD=VVDD(1)

µA

PGD Output Low Voltage

PGD_LOW

PGD=3mA

0.4

Fault Protection

LIM Source Current

LIM

μA

LIM Temperature Coefficient

ILIM

3000

ppm

LIM Comparator Offset

VOFF

ILIM

-10

+10

Output Under-Voltage Fault

FB with respect to set point,

8 consecutive switching cycles

Output Over-Voltage Fault

FB with respect to set point rising/ falling

120

Over-Voltage Fault Delay(2)

DLY_OV

μs

Smart Power-save Protection Threshold(2)

SMRTPSV

FB with respect to set point rising

110

Over-Temperature Shutdown

Rising T

160

°C

Over-Temperature Hysteresis

OT_HYS

°C

Analog Inputs and Outputs

OUT Input Resistance

VOUT

Controller enabled

500k

Ω

Controller disabled/internal load enabled

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