LT3760 Просмотр технического описания (PDF) - Linear Technology

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производитель

LT3760

8-Channel × 100mA LED Driver

Linear Technology 

LT3760

Typical Performance Characteristics TA = 25°C, unless otherwise noted.

LED Current Waveforms

3000:1 PWM Dimming (100Hz)

I(LEDx)

40mA/DIV

(FRONT COVER

APPLICATION)

VREF vs Junction Temperature

1.525

1.505

SHDN/UVLO Threshold

vs Junction Temperature

1.525

1.505

I(L1)

1A/DIV

PWM

10V/DIV

5µs/DIV

1.485

1.485

3760 G04

1.465

1.465

1.445

–50

–25 0 25 50 75 100 125

JUNCTION TEMPERATURE (°C)

3760 G05

1.445

–50

–25 0 25 50 75 100 125

JUNCTION TEMERATURE (°C)

3760 G06

SHDN/UVLO Pin (Hysteresis)

Current vs Junction Temperature

2.80

2.70

2.60

2.50

2.40

2.30

2.20

–50

–25 0 25 50 75 100 125

JUNCTION TEMPERATURE (°C)

3760 G07

VIN Shutdown Current

vs Junction Temperature

5

VIN = 6V, SHDN/UVLO = 0V

4

3

2

1

0

–50 –25 0 25 50 75 100 125

JUNCTION TEMPERATURE (°C)

3760 G08

VIN Quiescent Current

vs Junction Temperature

15

VIN = 6V, RISET = 14.7k, CTRL = 0.1V

10

PWM = 1.5V, NO SWITCHING,

V(LED1-8) = 1.2V, CTRL = 0.1V

5

PWM = 0V, CTRL = 0.1V

Switching Frequency

vs Junction Temperature

1100

1050

1000

950

RT = 39.2k

VIN Quiescent Current vs VIN

12

RISET = 14.7k

10

PWM = 1.5V, NO SWITCHING,

V(LED1-8) = 1.2V, CTRL = 0.1V

8

6

4

PWM = 0V, CTRL = 0.1V

2

0

0 5 10 15 20 25 30 35 40

VIN (V)

3760 G09

VC High Clamp, Active

and Low Clamp Levels

vs Junction Temperature

2.5

VC HIGH CLAMP

2.0

1.5

VC ACTIVE (SWITCHING)

1.0

VC LOW CLAMP

0.5

0

–50 –25 0 25 50 75 100 125

JUNCTION TEMPERATURE (°C)

3760 G10

900

–50

–25 0 25 50 75 100 125

JUNCTION TEMPERATURE (°C)

3760 G11

0.0

–50

–25 0 25 50 75 100 125

JUNCTION TEMPERATURE (°C)

3760 G12

3760fc

6

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