Rainbow-electronics MAX15054 Uživatelský manuál stáhnout pdf (Strana 4)

High-Side MOSFET Driver for HB LED Drivers

and DC-DC Applications

MAX15054

4 ______________________________________________________________________________________

Typical Operating Characteristics

= V

BST

= 5V, V

= V

GND

= 0V, T

= +25°C, unless otherwise noted.)

BST OPERATING SUPPLY CURRENT

vs. SWITCHING FREQUENCY

MAX15054 toc06

SWITCHING FREQUENCY (kHz)

BSTO

(µA)

10001001.0 10

250

500

750

1000

1250

1500

1750

2000

0.1 10,000

NO LOAD ON HDRV

HI INPUT THRESHOLDS vs. TEMPERATURE

MAX15054 toc07

TEMPERATURE (NC)

INPUT THRESHOLD (V)

11095-25 -10 5 35 50 6520 80

2.25

2.50

2.75

3.00

3.25

3.50

3.75

4.00

2.00

-40 125

RISING

FALLING

POWER-UP AND POWER-DOWN SEQUENCE

MAX15054 toc04

HDRV

1V/div

40µs/div

= 5kHz AT HI

, BST-LX QUIESCENT SUPPLY

CURRENT vs. SUPPLY VOLTAGE

MAX15054 toc05

SUPPLY VOLTAGE (V)

QUIESCENT CURRENT (µA)

5.04.53.5 4.01.0 1.5 2.0 2.5 3.00.5

5.5

= +125NC

BST

= +85NC

= +25NC

= -40NC

UNDERVOLTAGE LOCKOUT

THRESHOLD vs. TEMPERATURE

MAX15054 toc01

TEMPERATURE (NC)

UVLO THRESHOLD (V)

1109565 80-10 5 20 35 50-25

4.000

4.025

4.050

4.075

4.100

4.125

4.150

4.175

4.200

4.225

RISING

FALLING

4.250

3.975

-40 125

BST-LX UNDERVOLTAGE LOCKOUT

THRESHOLD vs. TEMPERATURE

MAX15054 toc02

TEMPERATURE (°C)

UVLO THRESHOLD (V)

1109565 80-10 5 20 35 50-25

3.625

3.650

3.675

3.700

3.725

3.750

3.775

3.800

3.825

3.850

3.875

3.600

-40 125

BST-LX FALLING

BST-LX RISING

POWER-UP AND POWER-DOWN SEQUENCE

MAX15054 toc03

HDRV

1V/div

400µs/div

= 5kHz AT HI

1 2 3 4 5 6 7 8 9

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