MAX8521 datasheet(6/18 Pages) MAXIM

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Smallest TEC Power Drivers for Optical

Modules

_______________________________________________________________________________________

DIFFERENTIAL

OUTPUT VOLTAGE RIPPLE

MAX8520/21 toc04

400ns/div

VOS2 - VOS1

1mV/div

AC-COUPLED

C2 = C7 = 1

µF

ITEC = 1A

VDD RIPPLE

MAX8520/21 toc05

400ns/div

VDD

20mV/div

AC-COUPLED

ITEC = 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

VCTLI

1V/div

ITEC

1A/div

ZERO-CROSSING TEC CURRENT

MAX8520/21 toc08

1ms/div

VCTLI

I00mV/div

ITEC

100mA/div

1.5V

VITEC vs. TEC CURRENT

TEC CURRENT (A)

1.5

1.0

0.5

-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)

(VDD = 5V, circuit of Figure 1, TA = +25°C unless otherwise noted)

ITEC vs. AMBIENT TEMPERATURE

AMBIENT TEMPERATURE (

°C)

+60

+40

+20

-20

0.460

0.470

0.480

0.490

0.500

0.510

0.520

0.450

-40

+80

FREQ = 1MHz

VCTLI = 2V

RTEC = 1

Ω

SWITCHING FREQUENCY

vs. TEMPERATURE

TEMPERATURE (

°C)

+80

+60

+40

+20

-20

500

600

700

800

900

1000

1100

400

-40

FREQ = 1MHz

VCTLI = 1.5V

RTEC = 1

Ω

FREQ = 500KHz

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