Rainbow-electronics MAX15031 Manual do Utilizador descarregar pdf (Página 8)

MAX15031

80V, 300mW Boost Converter and Current

Monitor for APD Bias Applications

8 _______________________________________________________________________________________

SWITCHING FREQUENCY

vs. INPUT VOLTAGE

MAX15031 toc30

INPUT VOLTAGE (V)

SWITCHING FREQUENCY (kHz)

10864

320

340

360

380

400

420

440

460

480

500

300

212

FB SET-POINT VARIATION

vs. TEMPERATURE

MAX15031 toc32

TEMPERATURE (°C)

FB SET-POINT VOLTAGE VARIATION (V)

1109580655035205-10-25

1.217

1.227

1.237

1.247

1.257

1.277

1.207

-40 125

= 5.5V

= 2.9V

= 5.5V

FB RISING

FB FALLING

APD OUTPUT RIPPLE VOLTAGE

MAX15031 toc34

2µs/div

APD

AC-COUPLED, 55V

100µV/div

0.1µF CAPACITOR CONNECTED

FROM APD TO GND.

SWITCHING FREQUENCY AND

DUTY CYCLE vs. LOAD CURRENT

MAX15031 toc31

LOAD CURRENT (mA)

SWITCHING FREQUENCY (kHz)

DUTY CYCLE

321

385

390

395

400

405

410

415

420

380

DUTY CYCLE

SWITCHING FREQUENCY

MEASURED AT CN

APD OUTPUT RIPPLE VOLTAGE

MAX15031 toc33

2µs/div

APD

AC-COUPLED, 55V

200µV/div

APD OUTPUT RIPPLE VOLTAGE

MAX15031 toc35

2µs/div

APD

AC-COUPLED, 70V

500µV/div

0.1µF CAPACITOR CONNECTED

FROM APD TO GND.

Typical Operating Characteristics (continued)

PWR

= V

= 3.3V, V

OUT

= 70V, circuit of Figure 3 (Figure 4 for V

> 5.5V), unless otherwise noted.)

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 16 17

MAX15031 1

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