LA4508(2000) Ver la hoja de datos (PDF) - SANYO -> Panasonic
Número de pieza
componentes Descripción
Fabricante
LA4508 Datasheet PDF : 7 Pages
| |||
LA4508
Proper Cares in Using IC
1. If the IC is used in the vicinity of the maximum rating, even a slight variation in conditions may cause the maximum
rating to be exceeded, thereby leading to breakdown. Allow an ample margin of variation for supply voltage, etc. and
use the IC in the range where the maximum ratings is not exceeded.
2. Pin-to-pin short, inverted insertion
If supply voltage is applied when the space between pins is shorted, breakdown or deterioration may occur. When
mounting the IC on the board or applying supply voltage, make sure that the space between pins is not shorted with
solder, etc. If the IC is inserted inversely, it may be broken down momentarily because of pin 7 : Power Gnd, pin 8 :
VCC.
3. Load short
If the IC is used with the load shorted for a long time, breakdown or deterioration may occur. Be sure not to short the
load.
4. Change in closed-loop gain
By connecting RNF in series with pins 3, 12 (NF pin), the gain can be reduced, but the following must be noted.
a. If RNF is connected, the ripple bypass effect brought about by the NF capacitor is lessened, leading to insuffi-
cient ripple rejection.
b. Do not operate at 40dB or less so that stable oscillation is maintained.
5. When the IC is used in radios or radio-cassette tape recorders, keep a good distance between IC and bar antenna.
A capacitor of 0.022µF or more (polyester film capacitor) connected between pins 9 and 7 and between pins 6 and 7
acts effectively against radiation to the SW band.
6. Printed circuit board
When making the board, refer to the sample printed circuit pattern. No feedback loop must be formed between input
and output and make the line thick and short so that no common resistor exists between pre-GND and power-GND.
Continued on next page.
No.1440–6/7
Share Link: 