Rainbow-electronics MAX14514 Manual de usuario descargar pdf (Pagina 12)

MAX14514

Design Procedure

LX Inductor Selection

The recommended inductor values are 220µH/330µH.

For most applications, series resistance (DCR) should

be below 8Ω for reasonable efficiency. Do not exceed

the inductor’s saturation current.

Dual Electroluminescent Lamp Driver

12 ______________________________________________________________________________________

CHARGE-CURRENT-

LIMIT RESISTOR

DISCHARGE

RESISTANCE

STORAGE

CAPACITOR

100pF

1MΩ

1500Ω

HIGH-

VOLTAGE

SOURCE

DEVICE

UNDER

TEST

Figure 1a. Human Body ESD Test Model

100%

90%

36.8%

TIME

CURRENT WAVEFORM

PEAK-TO-PEAK RINGING

(NOT DRAWN TO SCALE)

10%

AMPS

Figure 1b. Human Body Current Waveform

CHARGE-CURRENT-

LIMIT RESISTOR

DISCHARGE

RESISTANCE

STORAGE

CAPACITOR

150pF

50MΩ TO 100MΩ

330Ω

HIGH-

VOLTAGE

SOURCE

DEVICE

UNDER

TEST

Figure 1c. IEC 61000-4-2 ESD Test Model

= 0.7ns TO 1ns

30ns

60ns

100%

90%

10%

PEAK

Figure 1d. IEC 61000-4-2 ESD Generator Current Waveform

INDUCTOR VALUE (µH) VENDOR WEBSITE PART

220 TOKO www.tokoam.com D312C 1001BS-221M

330 Coilcraft www.coilcraft.com DO1608C-334ML

470 Coilcraft www.coilcraft.com DO1608C-474ML

220 Coilcraft www.coilcraft.com LPS4018-224ML

330 Coilcraft www.coilcraft.com LPS4018-334ML

470 Coilcraft www.coilcraft.com LPS4018-474ML

220 Cooper Bussmann www.cooperet.com SDH3812-221-R

220 Cooper Bussmann www.cooperet.com SD3110-221-R

Table 2. Inductor Vendors

1 2 ... 7 8 9 10 11 12 13 14

MAX14514 1

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