LM2795 datasheet(4/24 Pages) TI1

No. de pieza	LM2795

Descripción Electrónicos	LM2794 /LM2795 Current Regulated Switched Capacitor LED Supply with Analog and PWM Brightness Control

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Fabricante Electrónico	TI1 [Texas Instruments]

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4 / 24 page

LM2794, LM2795

SNVS168L – JANUARY 2002 – REVISED MAY 2013

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Electrical Characteristics (continued)

Limits in standard typeface are for TJ = 25°C and limits in boldface type apply over the full Operating Junction

Temperature Range (

−30°C ≤ TJ ≤ +100°C). Unless otherwise specified, C1 = C2 = CIN = CHOLD = 1 µF, VIN = 3.6V, BRGT

pin = 0V; RSET =124Ω ; LM2794:VSD = VIN (LM2795: VSD = 0V).

Symbol

Parameter

Conditions

Min

Typ

Max

Units

IPULL-SD

Shutdown Pull-Up Current

VIN = 3.6V

1.5

µA

(LM2795)

VCP

Input Charge-Pump Mode To Pass

4.7

V

Mode Threshold

VCPH

Input Charge-Pump Mode To Pass

(1)

250

mV

Mode Hysteresis

VIH

SD Input Logic High (LM2794)

3.0V

≤ VIN ≤ 5.5V

1.0

V

SD Input Logic High (LM2795)

0.8VIN

VIL

SD Input Logic Low (LM2794)

3.0V

≤ VIN ≤ 5.5V

0.2

V

SD Input Logic Low (LM2795)

0.2VIN

ILEAK-SD

SD Input Leakage Current

0V

≤ VSD ≤ VIN

100

nA

RBRGT

BRGT Input Resistance

240

k

Ω

ISET

ISET Pin Output Current

IDX/10

mA

fSW

Switching Frequency (2)

3.0V

≤ VIN ≤ 4.4V

325

515

675

kHz

(1)

Voltage at which the device switches from charge-pump mode to pass mode or pass mode to charge-pump mode. For example, during

pass mode the device output (Pout) follows the input voltage.

(2)

The output switches operate at one eigth of the oscillator frequency, fOSC = 1/8fSW.

4

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