Rainbow-electronics MAX1554 Bedienungsanleitung PDF herunterladen (Seite 3)

MAX1553/MAX1554

High-Efficiency, 40V Step-Up

Converters for 2 to 10 White LEDs

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS

= 3.3V, V

= 0V, C

OUT

= 1µF, R

SENSE

= 10Ω, T

= -40°C to +85°C, unless otherwise noted.) (Note 1)

Note 1: Specifications to -40°C are guaranteed by design, not production tested.

PARAMETER CONDITIONS MIN MAX UNITS

MAX1553 2.7 5.5

Supply Voltage

MAX1554 3.15 5.50

Undervoltage Lockout Threshold V

rising or falling, 35mV hysteresis typical 2.35 2.65 V

Not switching 0.65

Quiescent Current

Switching 0.9

OV Threshold Rising edge 1.18 1.33 V

BRT Input Resistance 0 < V

BRT

< 1.5V, EN = V

200 600 kΩ

TIMING CONTROL

Maximum On-Time V

= 3.3V 2.0 4.8 µs

Minimum Off-Time 150 350 ns

ERROR AMPLIFIER

FB Threshold V

BRT

= 1.25V 192 217 mV

N-CHANNEL SWITCH

LX On-Resistance 1.4 Ω

MAX1553 300 600

LX Current Limit

MAX1554, V

= 4.2V 600 1200

SHUTDOWN CONTROL

EN Logic-Level High 1.8 V

EN Logic-Level Low 0.4 V

ELECTRICAL CHARACTERISTICS (continued)

= 3.3V, V

= 0V, C

OUT

= 1µF, R

SENSE

= 10Ω, T

= 0°C to +85°C, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER CONDITIONS MIN TYP MAX UNITS

MAX1553 300 480 600

LX Current Limit

MAX1554, V

= 4.2V 600 970 1200

= +25°C 0.1 5

LX Leakage Current

= 38V,

= 0V

= +85°C1

µA

SHUTDOWN CONTROL

EN Logic-Level High 1.8 V

EN Logic-Level Low 0.4 V

= +25°C 0.01 1

EN Input Current V

= 0V or 5.5V

= +85°C 0.1

µA

1 2 3 4 5 6 7 8 9 10 11

Kommentare zu diesen Handbüchern

Keine Kommentare

Rainbow-electronics MAX1554 Bedienungsanleitung Seite 3

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Sensoren Rainbow-electronics MAX1554