SP6887 datasheet(4/10 Pages) EXAR

номер детали	SP6887

подробное описание детали	4 CHANNEL REGULATED CHARGE PUMP WLED DRIVER

PDF	10 Pages

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производитель	EXAR [Exar Corporation]

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ELECTRICAL SPECIFICATIONS

Rev. C – 10/31/2007

SP6887 4 Channel WLED Driver

4/10

TA=25ºC, VIN=3.5V, CIN=COUT=1µF, unless otherwise noted.

Parameter

Symbol

Conditions

Min

Typ.

Max

Unit

Input Voltage Range

VIN

2.7

5.5

Shutdown Current

ISD

VEN=0V Shutdown Mode

0.05

µA

1X Mode, No Load

0.6

1.2

Quiescent Current

1.5x Mode, No Load

2.5

RSET Regulated Voltage

VRSET

1.19

1.23

1.25

Programmed LED Current

ILED

RSET=90kΩ

RSET=29.3kΩ

RSET=14.7kΩ

5.0

15.0

30.0

LED Current Accuracy

ILED-ACC

±5

LED Channel Matching

ILED-DEV

(ILED-ILEDAVG)/ILEDAVG

±3

Output Resistance

(Open Loop)

1x Mode, IO=100mA

1.5x Mode, IO=100mA

1.7

4.3

Ω

Charge Pump Frequency

fOSC

1.0

MHz

VIN at Mode Transition

from 1x to 1.5x

VIN-Tran

ILED=15mA

ILED=20mA

3.45

3.60

1x to 1.5x Mode Transition

Dropout Delay

TDROP

0.4

0.6

0.9

Input Leakage Current

IEN-CTR

On Inputs EN, CTR0, 1 & 2

µA

High Detect Threshold

IEN-CTRH

On Inputs EN, CTR0, 1 & 2

1.5

Low Detect Threshold

IEN-CTRL

On Inputs EN, CTR0, 1 & 2

0.4

Typical Characteristics

VIN=3.6V, EN=VIN, RSET=24kΩ, CIN=1µF, TA=25ºC, unless otherwise noted.

1. Efficiency vs Input Voltage (4 LEDs)

2. Efficiency vs Output Current (4 LEDs)

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