SP2354 datasheet(4/8 Pages) SYNC-POWER

4 / 8 page

2016/3/16

Ver.1

Page 4

SP2354

1A Buck-Boost LED Driver

ELECTRICAL CHARACTERISTICS

(Unless otherwise stated, these specifications apply TA=25°C; VIN=3.6V, RISET=22K)

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Unit

SUPPLY

VIN

Supply Voltage

2.8

5.5

IIN

Supply Current

2.9V <= VIN <= 5.5V

1000

1350

2.9V <= VIN <= 5.5V,

VEN1 = VEN2 = 0V

VIN < UVLO,

VEN1 = VEN2 = VIN

UVLO

Under Voltage Lockout Threshold

VIN Rising

2.6

2.8

VIN Falling

2.15

2.35

OSC

Oscillator Frequency

825

925

1050

KHz

OUTPUT

VOUT

Maximum VOUT

LED Pin Open,

ILED = 1A

5.2

5.4

VISET

ISET1 and ISET2 Voltage

3.08K <= RISET <=20.5K

934

954

967

VLED

LED Pin Voltage

ILED = 1A

140

IRATIO*

LED Output Current to Programmed

Current Ratio

ILED = 500mA

3150

3550

3800

ENABLE

VEN

Enable Shutdown Voltage

0.2

0.66

VEN(NOR)

Enable Voltage Normal Operation

0.68

1.2

IEN

Enable 1 and Enable 2 Current

-1

SOFT START

TSS

Soft-Start Period

0.9V to 2.1V

300

SWITCHING REGULATOR

RPMOS**

RDS(on) for Switch A and D

VOUT = 3.6V

170

mΩ

RNMOS**

RDS(on) for Switch B and C

130

mΩ

ILPMOS

Leakage Current for Switch A and D

-1

ILNMOS

Leakage Current for Switch B and C

-1

Forward Switch Current Limit

Switch A

2.5

3.5

Reverse Switch Current Limit

Switch D, VOUT = 3.6V

500

* IRATIO = ILED/(IISET1 + IISET2)

** Guaranteed by Design

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