LM2756 datasheet(6/25 Pages) TI1

No de pièce	LM2756

Description	Multi-Display Inductorless LED Driver with 32 Exponential Dimming Steps in micro SMD

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Fabricant	TI1 [Texas Instruments]

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LM2756

SNVS504B – JULY 2007 – REVISED DECEMBER 2007

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Electrical Characteristics (continued)

(1) (2)

Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range.

Unless otherwise specified: VIN = 3.6V; VHWEN = VIN; VDxA = VDxB = VDxC = 0.4V; RSET = 11.8kΩ; GroupA = GroupB = GroupC

= Fullscale Current; ENA, ENB, ENC Bits = “1”; SD53, SD62, 53A, 62A Bits = "0"; C1 = C2 = CIN= COUT= 1.0µF;

Specifications related to output current(s) and current setting pins (IDxx and ISET) apply to GroupA and GroupB.

(3)

Symbol

Parameter

Condition

Min

Typ

Max

Units

Reset

0

0.580

VHWEN

HWEN Voltage Thresholds

2.7V

≤ VIN ≤ 5.5V

V

Normal Operation

1.075

VIN

I2C Compatible Interface Voltage Specifications (SCL, SDIO)

VIL

Input Logic Low "0"

2.7V

≤ VIN ≤ 5.5V

0

0.710

V

VIH

Input Logic High "1"

2.7V

≤ VIN ≤ 5.5V

1.225

VIN

V

VOL

Output Logic Low "0"

ILOAD = 3.5mA

400

mV

I2C Compatible Interface Timing Specifications (SCL, SDIO)(7)

t1

SCL (Clock Period)

(8)

294

ns

t2

Data In Setup Time to SCL High

100

ns

t3

Data Out stable After SCL Low

0

ns

SDIO Low Setup Time to SCL Low

t4

100

ns

(Start)

SDIO High Hold Time After SCL High

t5

100

ns

(Stop)

(7)

SCL and SDIO should be glitch-free in order for proper brightness control to be realized.

(8)

SCL is tested with a 50% duty-cycle clock.

Figure 3.

6

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