LT3496_15 datasheet(3/20 Pages) LINER

Part #	LT3496

Description	Triple Output LED Driver

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT3496

3496ff

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, VSHDN = 5V, CAP1, CAP2, CAP3 = 5V, PWM1, PWM2, PWM3 = 5V,

fADJ = 0.5V, CTRL1, CTRL2, CTRL3 = 1.5V, OVP1, OVP2, OVP3 = 0V, unless otherwise noted.

electrical characteristics

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VIN Operation Voltage

(Note 4)

3

30

V

VIN Undervoltage Lockout

2.1

2.4

V

Full-Scale LED Current Sense Voltage

(VCAP1-LED1, VCAP2-LED2, VCAP3-LED3)

CAP1, CAP2, CAP3 = 24V

l

98

97

100

103

104

mV

One-Tenth Scale LED Current Sense Voltage

(VCAP1-LED1, VCAP2-LED2, VCAP3-LED3)

CTRL1, CTRL2, CTRL3 = 100mV, CAP1, CAP2, CAP3 = 24V

H-Grade

E-Grade, I-Grade

l

7.5

10

13.5

12.5

mV

CAP1, CAP2, CAP3 Operating Voltage

0V ≤ VCAP1-LED1 ≤ 104mV

0V ≤ VCAP2-LED2 ≤ 104mV

0V ≤ VCAP3-LED3 ≤ 104mV

2.5

45

V

VREF Output Voltage

IREF = 200µA, Current Out of Pin

l

1.96

2

2.04

V

VREF Line Regulation

3V ≤ VIN ≤ 40V, IREF = 10µA

0.03

%/V

Quiescent Current in Shutdown

SHDN = 0V

0.1

10

µA

Quiescent Current Idle

PWM1, PWM2, PWM3 = 0V

6

7.5

mA

Quiescent Current Active (Not Switching)

11

14

mA

Switching Frequency

fADJ = 1.5V

fADJ = 0.5V

fADJ = 0.1V

1900

2100

1300

330

2300

kHz

Maximum Duty Cycle

fADJ = 1.5V (2.1MHz)

fADJ = 0.5V (1.3MHz)

fADJ = 0.1V (330kHz)

l

70

78

87

97

%

CTRL1, CTRL2, CTRL3 Input Bias Current

Current Out of Pin, CTRL1, CTRL2, CTRL3 = 0.1V

20

100

nA

fADJ Input Bias Current

Current Out of Pin, fADJ = 0.1V

20

100

nA

OVP1, OVP2, OVP3 Input Bias Current

Current Out of Pin, OVP1, OVP2, OVP3 = 0.1V

10

100

nA

OVP1, OVP2, OVP3 Threshold

0.95

1

1.05

V

VC1, VC2, VC3 Idle Input Bias Current

PWM1, PWM2, PWM3 = 0V

–20

0

20

nA

VC1, VC2, VC3 Output Impedance

CAP1, CAP2, CAP3 = 24V

10

MΩ

EAMP gm (ΔIVC/ΔVCAP-LED)

CAP1, CAP2, CAP3 = 24V

200

µS

SW1, SW2, SW3 Current Limit

(Note 3)

750

1000

1250

mA

SW1, SW2, SW3 VCESAT

ISW = 500mA (Note 3)

260

mV

SW1, SW2, SW3 Leakage Current

SHDN = 0V, SW = 5V

2

µA

CAP1, CAP2, CAP3 Input Bias Current

180

250

µA

CAP1, CAP2, CAP3, LED1, LED2, LED3 Idle Input

Bias Current

PWM1, PWM2, PWM3 = 0V

1

µA

CAP1, CAP2, CAP3, LED1, LED2, LED3 Input Bias

Current in Shutdown

SHDN = 0V

1

µA

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