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參數資料
| 型號： | LQA28A |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 3V, 1W Boosted Boomer |
| 中文描述： | 3V的，1W的，細看布瑪 |
| 文件頁數： | 4/18頁 |
| 文件大?。?/td> | 1063K |
| 代理商： | LQA28A |
Electrical Characteristics V
DD
= 3.0V
(Notes 1, 2) (Continued)
The following specifications apply for V
= 3.0V, A
V-BTL
= 26dB, R
L
= 8
, C
B
= 1.0μF, R
1
= 51.1k
, R
2
= 15k
unless other-
wise specified. Limits apply for T
A
= 25C.
Symbol
Parameter
Conditions
LM4805
Units
(Limits)
Typical
(Note 6)
1.23
Limit
(Notes 7, 8)
1.205
1.255
V
FB
Feedback Pin Reference Voltage
(Note 11)
V (max)
V (min)
Note 1:
All voltages are measured with respect to the GND pin, unless otherwise specified.
Note 2:
Absolute Maximum Ratings
indicate limits beyond which damage to the device may occur.
Operating Ratings
indicate conditions for which the device is
functional, but do not guarantee specific performance limits.
Electrical Characteristics
state DC andAC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit
is given, however, the typical value is a good indication of device performance.
Note 3:
The maximum power dissipation must be derated at elevated temperatures and is dictated by T
JMAX
,
θ
JA
, and the ambient temperature, T
A
. The maximum
allowable power dissipation is P
DMAX
= (T
JMAX
T
A
) /
θ
JA
or the given in Absolute Maximum Ratings, whichever is lower.
Note 4:
Human body model, 100pF discharged through a 1.5k
resistor.
Note 5:
Machine Model, 220pF–240pF discharged through all pins.
Note 6:
Typicals are measured at 25C and represent the parametric norm.
Note 7:
Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 9:
Shutdown current is measured at an ambient temperature of 25C. The Shutdown pin should be driven as close as possible to GND for minimum shutdown
current.
Note 10:
Shutdown current is measured with components R1 and R2 removed.
Note 11:
Feedback pin reference voltage is measured with theAudioAmplifier’s V1 (pin 26) floating and no addition load connected to the cathode of D1 (see Figure
1).
L
www.national.com
4
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