SC623 데이터 시트보기 (PDF) - Semtech Corporation

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SC623

LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, and SemWire™ Interface

Semtech Corporation 

SC623

Electrical Characteristics (continued)

Parameter

Symbol

Fault Protection (continued)

Charge Pump

V

Over-Voltage Protection

OVP

Undervoltage Lockout

V

UVLO

V

UVLO-HYS

Charge Pump Electrical Specifications

Maximum Total Output

Current

I

OUT(MAX)

Backlight Current Setting

Flash Current Setting

Backlight Current Accuracy

Backlight Current Matching

Flash Current Accuracy

1x Mode to 1.5x Mode

Falling Transition Voltage

1.5x Mode to 1x Mode

Hysteresis

1.5x Mode to 2x Mode

Falling Transition Voltage

2x Mode to 1.5x Mode

Hysteresis

Current Sink Off-State

Leakage Current

I

BL

IFL

IBL_ACC

I

BL-BL

I

FL_ACC

V

TRANS1x

V

HYST1x

V

TRANS1.5x

V

HYST1.5x

I

BLn

Pump Frequency

f

PUMP

Conditions

VOUT pin open circuit, VOUT = VOVP

rising threshold

Decreasing V

IN

V > 3.4V, sum of all active LED currents,

IN

V

= 4.0V

OUT(MAX)

Nominal setting for BL1 thru BL4

Nominal setting for FL

VIN = 3.7V, IBL = 12mA, TA = 25°C

V = 3.7V, I = 12mA(3)

IN

BL

V = 3.7V, I = 400mA, T = 25°C

IN

FL

A

I = 40mA, I = 10mA, V = 3.2V

OUT

BLn

OUT

I = 40mA, I = 10mA, V = 3.2V

OUT

BLn

OUT

I = 40mA, I = 10mA, V = 4.0V(4)

OUT

BLn

OUT

I = 40mA, I = 10mA, V = 4.0V(4)

OUT

BLn

OUT

V = V = 4.2V

IN

BLn

V = 3.2V

IN

Min Typ Max Units

5.3 5.7

6.0

V

2.4

V

300

mV

500

mA

0.5

25

mA

50

400 mA

-8 ±1.5 +8

%

-3.5 ±0.5 +3.5

%

-15

+15

%

3.27

V

250

mV

2.92

V

300

mV

0.1

1

μA

250

kHz

4

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