Rainbow-electronics MAX8596Z Manual de usuario descargar pdf (Pagina 3)

MAX8595Z/MAX8596Z

High-Efficiency, 32V Step-Up Converters

with T

Derating Option for 2 to 8 White LEDs

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= 3.0V, L = 22µH, C

= 2.2µF, C

OUT

= 0.1µF, C

COMP

= 0.1µF, R

SENSE

= 13Ω, V

CTRL

= 1.5V, T

= -40°C to +85°C, unless other-

wise noted. Typical values are at T

= +25°C.) (Note 1)

PARAMETER CONDITIONS

MIN

TYP

MAX

UNITS

CS Derating Function Slope MAX8596Z, V

CTRL

= 3.0V, T

= +42°C to +85°C

-5.5

mV/°C

CTRL Input Resistance V

CTRL

1.5V

250 500

780 kΩ

CTRL Dual-Mode Threshold

100 170

240 mV

CTRL Dual-Mode Hysteresis 5mV

CTRL Shutdown Enable Delay (Note 3) 6.0 8.2

10.5

CS to COMP Transconductance

COMP

= 1.5V 32 50 82 µS

COMP Input Resistance to

Ground

In shutdown, UVLO or OVLO 20 kΩ

OSCILLATOR

Operating Frequency

0.75

1.0

1.25

MHz

PWM mode 12

Minimum Duty Cycle

Pulse skipping 0

Maximum Duty Cycle CTRL = IN, CS = GND 94 95 %

N-CHANNEL SWITCH

LX On-Resistance I

= 190mA 0.8

1.35

Ω

= +25°C

0.01

LX Leakage Current

= 36V, CTRL = GND

= +85°C1

µA

LX Current Limit Duty cycle = 90%

500 700

900 mA

Note 1: Parameters are 100% production tested at T

= +25°C. Limits over the operating temperature range are regulated by

design and characterization.

Note 2: V

is the forward-voltage drop of the Schottky diode in Figure 1.

Note 3: Time from CTRL going below the Dual-Mode threshold to IC shutdown.

1 2 3 4 5 6 7 8

MAX8595Z/MAX8596Z 1

Comentarios a estos manuales

Sin comentarios

Rainbow-electronics MAX8596Z Manual de usuario Pagina 3

Comentarios a estos manuales

Relacionado con productos y manuales para Sensores Rainbow-electronics MAX8596Z