SC658 datasheet(4/22 Pages) SEMTECH

Part #	SC658

Description	Backlight Driver for 4 LEDs with SemPulseTM Interface

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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4

Electrical Characteristics (continued)

SC658

Parameter

Symbol

Conditions

Min

Typ

Max

Units

x Mode to .5x Mode

Falling Transition Input Voltage

V

TRANSx

I

OUT = 40mA, IBLn = 0mA, VOUT = 3.2V

3.24

V

.5x Mode to x Mode Hysteresis

V

HYSTx

I

OUT = 40mA, IBLn = 0mA, VOUT = 3.2V

250

mV

.5x Mode to 2x Mode

Falling Transition Input Voltage

V

TRANS.5x

I

OUT = 40mA, IBLn = 0mA, VOUT = 4.2V

(4)

3.07

V

Current Sink Off-State

Leakage Current

I

BLn(off)

V

IN = VBLn = 4.2V

0.

µA

Charge Pump Frequency

f

PUMP

V

IN = 3.2V

250

kHz

Output Short Circuit

Current Limit

I

OUT(SC)

OUT pin shorted to GND

60

mA

V

OUT > 2.5V

300

Under Voltage Lockout

V

UVLO-OFF

Increasing V

IN, lock-out released

2.7

V

UVLO-HYS

Hysteresis

800

mV

Over-Voltage Protection

V

OVP

OUT pin open circuit, V

OUT = VOVP,

rising threshold

5.7

6.0

V

Over-Temperature

T

OT

Rising temperature

60

°C

OT Hysteresis

T

OT-HYS

20

°C

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