Rainbow-electronics MAX16825 Instrukcja Użytkownika Pobierz pdf (Strona 3)

MAX16824/MAX16825

High-Voltage, Three-Channel Linear

High-Brightness LED Drivers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= 12V, C

REG

= 1µF to GND, I

REG

= 0, R

CS_

= 2Ω from CS_ to GND, T

= T

= -40°C to +125°C, unless otherwise noted. Typical

values are at T

= T

= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

OUTPUTS (OUT1, OUT2, OUT3)

Turn-On Time t

PWM_ rising time, t

, is measured from 20%

to 80% of I

OUT

1µs

Turn-Off Time t

PWM_ falling time, t

, is measured from

80% to 20% of I

OUT

1µs

SPI INTERFACE (CLK, LE, OE, DIN, DOUT) (Figures 3 and 4)

DIN, CLK, LE, OE Input Bias

Current

DIN = CLK = LE = OE = 0 or 5V 1 µA

DIN, CLK, LE, OE Input-Voltage

High

2.2 V

DIN, CLK, LE, OE Input-Voltage

Low

0.5 V

CLK Clock Period t

50% of CLK rising to 50% of next CLK

rising, Figure 3

50 ns

CLK Pulse-Width High t

50% of CLK rising to 50% of CLK falling,

Figure 3

24 ns

CLK Pulse-Width Low t

50% of CLK falling to 50% of CLK rising,

Figure 3

24 ns

DIN Setup Time t

50% of DIN rising to 50% of CLK rising,

Figure 3

5ns

DIN Hold Time t

50% of CLK rising to 50% of DIN falling,

Figure 3

10 ns

DOUT Propagation Delay t

50% of CLK rising to 50% of DOUT rising/

falling, Figure 3

5ns

DOUT Rise/Fall Time t

DOUT

= 10pF, 10% to 90% of DOUT

rising/falling edge (Note 6)

15 ns

DOUT Voltage High V

DOH

SOURCE

= 4mA 4.5 V

DOUT Voltage Low V

DOL

SINK

= 4mA 0.5 V

LE Pulse-Width High t

50% of LE rising to 50% of LE falling,

Figure 3

20 ns

LE Setup Time t

50% of CLK rising to 50% of LE rising,

Figure 3

15 ns

LE Rising to OUT_ Rising Delay t

LRR

50% of LE rising to 50% of OUT_ rising,

Figure 4

150 ns

LE Rising to OUT_ Falling Delay t

LRF

50% of LE rising to 50% of OUT_ falling,

Figure 4

475 ns

1 2 3 4 5 6 7 8 ... 14 15

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