Rainbow-electronics MAX8982X Bedienungsanleitung PDF herunterladen (Seite 69)

Power-Management ICs for

ICERA E400/E450 Platform

MAX8982A/MAX8982X

Applications Information

Inductor Selection

The step-down converters operate with inductors of 1FH

to 4.7FH. Low inductance values are physically smaller,

but require faster switching, which results in some effi-

ciency loss. The inductor’s DC current rating only needs

to match the maximum load current of the application

plus 100mA because the step-down converters feature

zero current overshoot during startup and load transients.

For optimum voltage positioning load transients, choose

an inductor with DC series resistance in the 30mW

to 100mW range. For higher efficiency at heavy load

(above 200mA) or minimal load regulation (but some

transient overshoot), the resistance should be kept

below 100mW. For light load applications up to 200mA,

a higher resistance is acceptable with very little impact

on performance.

Recommended inductors are listed in Table 60.

Table 60. Recommended Inductors

MANUFACTURER SERIES

INDUCTANCE

(FH)

DC RESISTANCE

(I typ)

CURRENT

RATING (mA)

DT = +40NC RISE

DIMENSIONS

L x W x H (mm)

TOKO

MDT2520-CR

1.0 0.06 1550

2.5 x 2.0 x 1.0

1.5 0.08 1400

2.2 0.09 1350

3.3 0.10 1300

DE2810C

Flat Wire

1.5 0.06 2000

3.0 x 2.8 x 1.0

2.2 0.085 1600

3.3 0.130 1300

4.7 0.180 1100

DE2812C

Flat Wire

1.5 0.050 2600

3.0 x 2.8 x 1.2

2.0 0.067 2300

3.3 0.100 1700

4.7 0.130 1500

DEM3518C 2.2 0.040 2550 3.9 x 3.7 x 1.8

DEM2818C* 2.2 0.039 2200 3.0 x 3.0 x 1.8

Hitachi-Metals

KSLI-252010AG

1 0.050 2600

2.5 x 2.0 x 1.0

2.2 0.100 1800

3.3 0.100 1800

4.7 0.115 1700

KSLI-201610AG

1 0.090 1900

2.0 x 1.6 x 1.0

2.2 0.140 1500

3.3 0.180 1300

4.7 0.200 1300

KSLI-201210AG

1 0.120 1500

2.0 x 1.2 x 1.0

2.2 0.190 1300

3.3 0.230 1200

4.7 0.270 1100

KSLI-252012AG-2R2** 2.2 0.1 1900 2.5 x 2.0 x 1.2

1 2 ... 64 65 66 67 68 69 70 71 72 73

Kommentare zu diesen Handbüchern

Keine Kommentare

Rainbow-electronics MAX8982X Bedienungsanleitung Seite 69

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Sensoren Rainbow-electronics MAX8982X