LT3518 datasheet(3/32 Pages) LINER

Part #	LT3518

Description	8-Channel 횞 100mA LED Driver

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT3760

3

3760fc

elecTrical characTerisTics

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

INPUT BIAS, REFERENCE

Minimum Operational VIN (To Allow GATE Switching)

VC = 1.5V

VIN = INTVCC (Shorted)

VIN ≠ INTVCC

l

4.2

5.5

4.5

6.0

V

Operational VIN

VIN = INTVCC (Shorted)

VIN ≠ INTVCC

4.5

6

13

40

V

VIN Quiescent Current

CTRL = 0.1V, PWM = 0V

CTRL = 0.1V, PWM = 1.5V, (Not Switching)

LED1–8 = 1.2V

4.2

9.5

5.7

12

mA

VIN Shutdown Current (VIN ≠ INTVCC) (Not Shorted)

SHDN/UVLO = 0V, VIN =6V

SHDN/UVLO = 0V, VIN = 40V

0.1

2

10

µA

VIN Shutdown Current (VIN = INTVCC (Shorted))

SHDN/UVLO = 0V, VIN = INTVCC = 4.5V

SHDN/UVLO = 0V, VIN = INTVCC = 13V

10

20

40

µA

SHDN/UVLO Threshold (Micropower) (Falling) (VSD)

IVIN < 20µA

l

0.3

0.7

V

SHDN/UVLO Threshold (UVLO) (Falling)

(Stop Switching) (VUV)

l

1.414

1.476

1.538

V

SHDN/UVLO Pin Current

SHDN/UVLO = VUV - 50mV

SHDN/UVLO = VUV + 50mV

l

1.6

2.4

0

3.2

µA

VREF Voltage

IVREF = 0µA

l

1.450

1.485

1.524

V

VREF Line Regulation

IVREF = 0µA, 6V < VIN < 40V

0.01

0.05

%/V

VREF Load Regulation

0 < IVREF < 150µA (Max)

2

mV

OSCILLATOR

Frequency: fOSC (100kHz)

RT = 523k

l

92

101

112

kHz

Frequency: fOSC (1MHz)

RT = 39.2k

l

0.90

1

1.10

MHz

fOSC (1MHz) Line Regulation

RT = 39.2k, 6V < VIN < 40V

0.1

0.2

%/V

RT Pin Voltage

RT = 39.2k

1.6

V

Minimum Off-Time

Minimum On-Time

(Note 5)

170

190

250

nS

SYNC Input High Threshold

2.2

V

SYNC Input Low Threshold

0.6

V

SYNC Input Current

SYNC = 0V

SYNC = 5V

0

25

µA

SYNC Frequency Range

RT = 523k

RT = 39.2k

0.12

1.2

1.5

MHz

LINEAR REGULATOR (INTVCC)

INTVCC Regulation Voltage

VIN = 12V

6.65

7

7.35

V

Dropout (VIN -INTVCC)

IINTVCC = 10mA

250

mV

INTVCC UVLO (+)

(Start Switching)

3.8

V

INTVCC UVLO (-)

(Stop Switching)

3.4

V

INTVCC Current Limit

l

40

57

mA

OVP/LED ERROR AMPLIFIERS

Transconductance (OVP)

∆IVC = ±2.5µA

4

µmhos

Voltage Gain (OVP)

5

V/V

Transconductance (LED)

∆IVC = ±2.5µA

33

µmhos

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = VOUT = 6V, RISET = 14.7k unless otherwise noted.

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