Rainbow-electronics MAX1729 Manual do Utilizador descarregar pdf (Página 10)

MAX1729

ECB and LCD Display Bias Supply with Accurate

Output Voltage and Temperature Compensation

10 ______________________________________________________________________________________

DC RESISTANCE

(Ω)

INDUCTANCE

(µH)

SUPPLIER

8.4220Murata

SATURATION

CURRENT (mA)

PART

LQH3C221K04M00

MAX HEIGHT

(mm)

2.2

Table 1. Recommended Inductors

Applications Information

PC Board Layout Considerations

Proper PC board layout minimizes output ripple and

increases efficiency. For best results, use a ground

plane, minimize the space between C1, C2, and GND

of the MAX1729, and place the inductor as close to LX

and IN as possible. For an example of proper PC board

layout, refer to the MAX1729 Evaluation Kit.

Chip Information

TRANSISTOR COUNT: 1154

CAPACITANCE

(µF)

1000pF

1C4

0.1C3

0.068

CAPACITOR

0.1C1

C6*

*Use a low-leakage capacitor.

Table 2. Recommended Capacitor Values

19470Panasonic 40ELT3KN115B 1.6

1 2 ... 5 6 7 8 9 10 11 12

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Rainbow-electronics MAX1729 Manual do Utilizador Página 10