V-Tec C5-AT25/D4 Instrukcja Użytkownika Pobierz pdf (Strona 5)

MAX8520/MAX8521

Smallest TEC Power Drivers for

Optical Modules

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

= PV

1 = PV

2 = SHDN = 5V, 1MHz mode (Note 2). PGND1 = PGND2 = GND, CTLI = MAXV = MAXIP = MAXIN = REF, T

-40°C to +85°C, unless otherwise noted.) (Note 7)

PARAMETER

SYMBOL

CONDITIONS

MIN MAX

UNITS

MAXV

= V

REF

x 0.67, V

OS1

to V

OS2

= ±4V,

= 5V

-2 +2 %

MAXV Threshold Accuracy

MAXV

= V

REF

x 0.33, V

OS1

to V

OS2

= ±2V,

= 3V

-3 +3 %

MAXV, MAXI_ Input Bias Current

MAXV-

BIAS

MAXI_-BIAS

MAXV

= V

MAXI_

= 0.1V or 1.5V

-0.1 +0.1

µA

CTLI Gain A

CTLI

= 0.5V to 2.5V (Note 6) 9.5

10.5

V/V

CTLI Input Resistance R

CTLI

1MΩ terminated at REF 0.5 2.0 MΩ

Error-Amp Transconductance g

50 160 µS

ITEC

Accuracy V

OS1

to V

= ±100mV, V

OS1

= V

/2 -10

+10

Note 3: Enter 1MHz mode by tying a 60kΩ resistor from FREQ to ground for the MAX8520, and tying FREQ to V

for the MAX8521.

Note 4: Includes PFET leakage.

Note 5: Duty-cycle specification is guaranteed by design and not production tested.

Note 6: CTLI Gain is defined as:

Note 7: Specifications to -40°C are guaranteed by design and not production tested.

CTLI

OS CS

−

()

∆

Typical Operating Characteristics

= 5V, circuit of Figure 1, T

= +25°C, unless otherwise noted)

EFFICIENCY vs. TEC CURRENT

= 5V, R

TEC

= 2Ω)

MAX8520/21 toc01

TEC CURENT (A)

EFFICIENCY (%)

1.41.20.8 1.00.4 0.60.2

0 1.6

FREQ = 500kHz

FREQ = 1MHz

EFFICIENCY vs. TEC CURRENT

= 3.3V, R

TEC

= 1.3Ω)

MAX8520/21 toc02

TEC CURRENT (A)

EFFICIENCY (%)

1.41.20.8 1.00.4 0.60.2

0 1.6

FREQ = 500kHz

FREQ = 1MHz

COMMON-MODE

OUTPUT VOLTAGE RIPPLE

MAX8520/21 toc03

400ns/div

OS2

20mV/div

AC-COUPLED

OS1

20mV/div

AC-COUPLED

TEC

= 1A

= C

= 1µF

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

MAX8520/MAX8521 1
Optical Modules 1

Komentarze do niniejszej Instrukcji

Brak uwag

V-Tec C5-AT25/D4 Instrukcja Użytkownika Strona 5

Komentarze do niniejszej Instrukcji