NJU8790 データシートの表示（PDF） - Japan Radio Corporation
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NJU8790 Datasheet PDF : 15 Pages
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NJU8790
ABSOLUTE MAXIMUM RATING (Ta=25°C)
PARAMETER
SYMBOL
RATING
UNIT
Power Supply Voltage
V+
+7
V
Power Dissipation*1)
Maximum Input Voltage
PD2
PD4
VIMAX
1200
mW
1700
mW
0 to V+ *2)
V
Operating Temperature Range
Topr
-40 to +85
°C
Storage Temperature Range
Tstg
-40 to +125
°C
Load Impedance
RLMIN
>3.6
Ω
*1) Power Dissipation
EIA/JEDEC STANDARD Test board (2layer or 4layer) mounting.
The class-D amplifiers operate with high power efficiency and low dissipation power compared to general analog-amplifiers. In
theory, the NJU8790 actualize quite high output-power such as 2.7W/channel at 5V operation into 4 ohms load, and total power
is supposed to be 5.4W. For this reason, it looks as if the NJU8790 exceeds the absolute maximum rating of the power
dissipation. However, in practice, the effective output-power of usual music sound is only about 1/5 to 1/10 of its maximum
output power, thus it may never exceed the absolute maximum rating.
*2) Don’t apply the input voltage that exceeds supply voltage.
ELECTRICAL RECOMMENDED OPERATING CONDITION (Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
Operating Voltage
V+
MIN.
2.7
TYP.
5.0
MAX.
5.5
UNIT
V
ELECTRICAL CHARACTERISTICS
♦DC CHARACTERISTICS1 (Ta=25°C, V+=5.0V, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITION
Operating Current
Reference Voltage
UVLO Detecting Voltage
IDD1
IDD2
VREF
VDDDET
No Signal, Active
No Signal, Standby
No signal
MIN.
-
-
1.47
2.0
TYP.
10.0
0.1
1.67
2.2
MAX.
15.0
1.0
1.87
2.4
UNIT
mA
µA
V
V
-3-
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