SC615A datasheet(3/12 Pages) SEMTECH

Part #	SC615A

Description	Charge Pump Flash LED Driver

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Manufacturer	SEMTECH [Semtech Corporation]

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POWER MANAGEMENT

SC615A

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Quiescent Current

I

Q

FLASH high

3.4

5

mA

FLASH low, CTRL high

2.0

4.5

mA

FLASH low, CTRL low

0.1

2

μA

Flash Mode Pulse

Duration(2)

t

FLASH

3.3V < V

IN < 4.2V

I

OUT = 500mA, VOUT > 2.8V

500

ms

Flash Mode

Start-Up Time(2)

t

F-ST

t = 0 when FLASH goes high to

I

OUT = 90% of ﬁnal value

1ms

Spotlight Mode

Start-Up Time(2)

t

S-ST

t = 0 when CTRL goes high to

I

OUT = 90% of ﬁnal value

1ms

Oscillator Frequency

f

OSC

Device Enabled

250

kHz

Oscillator

Frequency Accuracy

Δf

OSC

-15

15

%

Short-Circuit Output

Current Limit

I

SC

V

OUT = 0V

465

mA

Input Current Limit

I

LIMIT

3.3V < V

IN < 4.2V

2.1

A

V

IN = 3.7V, VOUT = 3.7V, TA = 25°C

1.38

1.53

Over-Temperature

Protection(2)

T

OT

150

°C

Hysteresis

10

°C

Logic Input

High Threshold

V

IH

FLASH, CTRL

1.5

V

Logic Input

Low Threshold

V

IL

FLASH, CTRL

0.4

V

Logic Input

High Current

I

IH

FLASH

1

20

35

μA

CTRL

2

40

70

μA

Logic Input

Low Current

I

IL

FLASH, CTRL

0.1

2

μA

ISET Ripple Voltage(2)

V

PP

Spotlight mode - I

OUT = 200mA

25

mV

FLASH mode - I

OUT = 500mA

100

Notes:

(1) V

OUT required by the typical LED at this current.

(2) Guaranteed by design - not tested in production.

Electrical Characteristics (Cont.)

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