V-Tec C5-AT25/D4 Instrukcja Użytkownika Pobierz pdf (Strona 6)

MAX8520/MAX8521

Smallest TEC Power Drivers for

Optical Modules

6 _______________________________________________________________________________________

DIFFERENTIAL

OUTPUT VOLTAGE RIPPLE

MAX8520/21 toc04

400ns/div

OS2

- V

OS1

1mV/div

AC-COUPLED

= C

= 1µF

TEC

= 1A

RIPPLE

MAX8520/21 toc05

400ns/div

20mV/div

AC-COUPLED

TEC

= 1A

TEC CURRENT RIPPLE

MAX8520/21 toc06

400ns/div

10mA/div

AC-COUPLED

1.5A

TEC CURRENT vs. CTLI VOLTAGE

MAX8520/21 toc07

20ms/div

CTLI

1V/div

TEC

1A/div

ZERO-CROSSING TEC CURRENT

MAX8520/21 toc08

1ms/div

CTLI

I00mV/div

TEC

100mA/div

1.5V

ITEC

vs. TEC CURRENT

MAX8520/21 toc09

TEC CURRENT (A)

ITEC

(V)

1.51.00.50-0.5-1.0-1.5

0.5

1.0

1.5

2.0

2.5

3.0

-2.0 2.0

Typical Operating Characteristics (continued)

= 5V, circuit of Figure 1, T

= +25°C, unless otherwise noted)

TEC

vs. AMBIENT TEMPERATURE

MAX8520/21 toc10

AMBIENT TEMPERATURE (°C)

TEC CURRENT (A)

6040200-20

0.460

0.470

0.480

0.490

0.500

0.510

0.520

0.450

-40 80

FREQ = 1MHz

CTLI

= 2V

TEC

= 1Ω

SWITCHING FREQUENCY

vs. TEMPERATURE

MAX8520/21 toc11

TEMPERATURE (°C)

SWITCHING FREQUENCY (kHz)

806040200-20

500

600

700

800

900

1000

1100

400

-40

FREQ = 1MHz

CTLI

= 1.5V

TEC

= 1Ω

FREQ = 500kHz

1 2 3 4 5 6 7 8 9 10 11 ... 18 19

MAX8520/MAX8521 1
Optical Modules 1

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