SC225KSIT datasheet(6/13 Pages) SECELECTRONICS

Part #	SC225KSIT

Description	120 kHz Bandwidth, High Voltage Isolation Current Sensor with Integrated Overcurrent Detection

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Manufacturer	SECELECTRONICS [SEC Electronics Inc.]

Direct Link	http://www.secsemi.com

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6 / 13 page

SC225KSIT

120 kHz Bandwidth, High Voltage Isolation

Current Sensor with Integrated Overcurrent Detection

6/13

Fault Enable (FAULT_EN

Pin) Input Low Voltage

Threshold

V

IL

–

0.1 × V

CC

V

Fault Enable (FAULT_EN

Pin) Input High Voltage

Threshold

V

IH

0.8 × V

CC

–

V

Fault Enable (FAULT_EN

Pin) Input Resistance

R

FEI

–

1

–

M

Ω

OVERCURRENT CHARACTERISTICS

Fault Enable (FAULT_EN

Pin) Delay

8

t

FED

Set FAULT_EN to low, V

OC = 0.25 ×

V

CC , COC = 0 F; then run a DC IP

exceeding the corresponding

overcurrent threshold; then reset

FAULT_EN from low to high and

measure the delay from the rising edge

of FAULT_EN to the falling edge of ¯

FAULT

–

15

–

μs

Fault Enable (FAULT_EN

Pin) Delay(Non-Latching

versions)9

t

FED(NL)

Set FAULT_EN to low, V

OC = 0.25 ×

V

CC , COC = 0 F; then run a DC IP

exceeding the corresponding

overcurrent threshold; then reset

FAULT_EN from low to high and

measure the delay from the rising edge

of FAULT_EN to the falling edge of

FAULT

–

150

–

ns

Overcurrent Fault

Response Time

t

OC

FAULT_EN set to high for a minimum

of

20 μs before the overcurrent event;

switchpoint set at V

OC = 0.25 × VCC ;

delay from IP exceeding overcurrent

fault threshold to V FAULT < 0.4 V,

–

1.9

–

μs

Undercurrent Fault

Response

Time(Non-Latching

versions)

t

UC

FAULT_EN set to high for a minimum

of 20

μs before the undercurrent event;

switchpoint set at V

OC = 0.25 × VCC ;

delay from I

P falling below the

overcurrent faultthreshold to V

FAULT

> 0.8 × VCC , without external

C

OC capacitor, RPU = 330 kΩ

–

3

–

μs

Overcurrent Fault Reset

Delay

t

OCR

Time from V

FAULTEN < VIL to

V FAULT > 0.8 × VCC , R

PU = 330 kΩ

–

500

–

ns

Overcurrent Fault Reset

Hold Time

t

OCH

Time from V

FAULTEN <VIL to rising edge

of V FAULT

–

250

–

ns

Overcurrent

Input

Resistance

R

OC

T

A = 25°C, VOC pin to GND

2

–

MΩ

VOLTAGE REFERENCE CHARACTERISTICS

Voltage Reference Output

V

ZCR

T

A

= 25 °C (Not a highly accurate

reference)

0.48×V

CC

0.5×V

CC 0.51×VCC

V

Voltage Reference Output

Load Current

I

ZCR

Source current

3

–

mA

Sink current

50

–

μA

Voltage Reference Output

Drift

∆V

ZCR

–

±10

–

mV

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