LT3754IUH Просмотр технического описания (PDF) - Linear Technology

Номер в каталоге

Компоненты Описание

производитель

LT3754IUH

16-Channel × 50mA LED Driver

Linear Technology 

LT3754

Electrical Characteristics 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.

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

4.5

V

l

5.5

6.0

V

Operational VIN

VIN = INTVCC (Shorted)

VIN ≠ INTVCC

4.5

13

V

6

40

V

VIN Quiescent Current

LEDx = 1.2V

CTRL = 0.1V, PWM = 0V

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

4.2

5.7

mA

9.5

12

mA

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

VIN Shutdown Current (VIN = INTVCC (Shorted))

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

SHDN/UVLO Threshold (UVLO) (Falling)

(Stop Switching) (VUV)

SHDN/UVLO Pin Current

VREF Voltage

VREF Line Regulation

VREF Load Regulation

OSCILLATOR

SHDN/UVLO = 0V, VIN =6V

SHDN/UVLO = 0V, VIN = 40V

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

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

IVIN < 20µA

SHDN/UVLO = VUV - 50mV

SHDN/UVLO = VUV + 50mV

IVREF = 0µA

IVREF = 0µA, 6V < VIN < 40V

0 < IVREF < 150µA (Max)

0.1

2

µA

10

µA

10

20

µA

20

40

µA

l 0.3

0.7

V

l 1.414 1.476 1.538

V

l 1.6

2.4

3.2

µA

0

µA

l 1.450 1.485 1.524

V

0.01 0.05

%/V

2

mV

Frequency: fOSC (100kHz)

Frequency: fOSC (1MHz)

fOSC (1MHz) Line Regulation

RT Pin Voltage

RT = 523k

RT = 39.2k

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

RT = 39.2k

l 92

101

112

kHz

l 0.90

1

1.10

MHz

0.1

0.2

%/V

1.6

V

Minimum Off-Time

Minimum On-Time

(Note 5)

(Note 5)

170

250

nS

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

µA

25

µA

SYNC Frequency Range

RT = 523k

RT = 39.2k

0.12

1.5

MHz

1.2

1.5

MHz

LINEAR REGULATOR (INTVCC)

INTVCC Regulation Voltage

Dropout (VIN - INTVCC)

VIN = 12V

IINTVCC = 10mA

6.65

7

7.35

V

250

mV

INTVCC UVLO (+)

(Start Switching)

3.8

V

INTVCC UVLO (–)

(Stop Switching)

3.4

V

INTVCC Current Limit

OVP/LED ERROR AMPLIFIERS

l 44

57

mA

Transconductance (OVP)

Voltage Gain (OVP)

∆IVC = ±2.5µA

4

µmhos

5

V/V

Transconductance (LED)

∆IVC = ±2.5µA

33

µmhos

3754fc

3

Share Link: