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PDF LA4425PV Data sheet ( Hoja de datos )
| Número de pieza | LA4425PV | |
| Descripción | 5W Power Amplifier | |
| Fabricantes | ON Semiconductor | |
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Hay una vista previa y un enlace de descarga de LA4425PV (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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LA4425PV
Monolithic Linear IC
5W Power Amplifier
with Very Few External Parts
for Car Radio and Car Stereo
http://onsemi.com
Overview
The LA4425PV is a 5W power amplifier with very few external parts. Encapsulated in a surface mount package
[SSOP44K (275 mil)], it is designed for operation without a heat sink. Only two external parts (Only IN/OUT coupling
capacitors). Almost no evaluation, adjustment and check of its functions as a power IC required, enabling control to be
simplified and set patterns to be further miniaturized.
Functions
• Wide operation supply range → 5 to 16V
• On-chip protection:
- Over-voltage protection
- Thermal protection
- Output D.C. short protection .
• On-chip pop noise reducing circuit
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Surge maximum supply voltage
Symbol
VCC max
VCC surge
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
IO peak
Pd max
Topr
Tstg
Rg = 0Ω
Conditions
Giant pulse 200ms
Rise time 1ms
When mounted on the specified PCB
Ratings
18
50
3.3
5.15
-40 to +85
-40 to +150
Unit
V
V
A
W
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
June, 2013
31412 SY/22912 SY 20110916 S00002 No.A2011-1/8
1 page  
LA4425PV
IC Usage Notes
• Maximum ratings
If the IC is used in the vicinity of the maximum ratings, even a slight variation in conditions may cause the maximum
ratings to be exceeded, thereby leading to a breakdown.
• Printed circuit board
When drawing the printed circuit pattern, refer to the sample printed circuit pattern. Be careful not to form a feedback
loop between input and output.
Always use both pins of the Pre GND, Power GND, OUT and VCC when designing the layout.
• Exposed Die-Pad
The exposed die pad on the back side of the IC must be connected to GND with a large pattern surface area.
• Load Resistance and Misoperation
It should be noted that when RL < 2Ω and VCC is high, and the switch is turned “ON” when setting is for a signal (THD
= 10%), the ground detector (current × voltage Schmitt circuit) operates momentarily.
• Starting Time (ts)
This is set at 0.35sec/typ, but it can be made shorter by making input capacitor Ci smaller, or longer by making it larger.
• Pop noise
The pop noise prevention circuit operates to reduce pop until Rg reaches 50kΩ. However, if Rg is left open, the charging
route of input capacitor Ci is lost, so the pop noise reduction circuit stops operating and click noises become louder.
• VG/OSC
The voltage gain is fixed at 45dB inside the IC. It is impossible to change it externally.
Phase compensation capacitors (350pF/total) are connected between individual stages inside the IC, and the open loop
gain is low. In addition, the upper and lower drives are made equivalent so that final stage current gain is adjusted,
providing a measure against unwanted high-frequency parasitic oscillation peculiar to power IC’s.
• BTL Connection
Connection is impossible with IC alone.
PS No.A2011-5/8
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LA4425PV.PDF ] | |
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