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NJM2770RB1-TE1

P1-P3P4-P4
NJM2770
-1-
HIGH-POWER & LOW-VOLTAGE AUDIO POWER AMPLIFIER
■ GENERAL DESCRIPTION ■ PACKAGE OUTLINE
The NJM2770 is a high-power and low-voltage audio
power amplifier with standby function. No external
coupling capacitors required because of the differential
output type. Two external resistors adjust the closed
loop gain. The output power is 250mW typical at
3V-supply 8ohm-load, and 400mW typical at 4.5v-supply
16ohm-load. The standby current is only 0.1µA typical.
The package of the NJM2770 is MSOP8(VSP8)*, and
the NJM2770 is suitable for PCS, codeless telephone,
speaker amplifier for hands free system, and especially
cellular phone because of low operating current, low
standby current, and high power output.
■ FEATURS
● Operating Voltage +2-+4.5V
● Operating Current 2.0mA typ.,at V
+
=3V
● Low Power-Down Current 0.1µA typ
● High Power Otput 250mW typ. at V
+
=3V,R
L
=8Ω
400mW typ. V
+
=4.5V,R
L
=16Ω
● Gain Range at Voice Band Gv=0-43dB
● Load Impedance R
L
=4-200Ω
● Thermal Shut Down Function
● Bipolar Technology
● Package Outline MSOP8 (VSP8)* MSOP8 (TVSP8)**
*MEET JEDEC MO-187-DA **MEET JEDEC MO-187-DA / THIN TYPE
■ PIN CONFIGURATION & BLOCK DIAGRAM
BIAS
1
2
3
4
8
5
6
7
-V
IN
+V
IN
+V
REF
V
OUT
1
CD
GND
V
+
V
OUT
2
#A
#
B
TSD
40k
Ω
40k
Ω
50k
Ω
50k
Ω
145k
Ω
Pin Function
1.CD
2.+V
REF
3.+V
IN
4.-V
IN
5.V
OUT
1
6.V
+
7.GND
8.V
OUT
2
NJM2770RB1
MSOP8(TVSP8)
NJM2770R
MSOP8(VSP8)
NJM2770
- 2 -
■ ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER SYMBOL RATINGS UNIT
Supply Voltage V
+
+5 V
Power Dissipation P
D
(MSOP8 (VSP8),
MSOP8 (TVSP8)) 400
mW
Operating Temperature Range Topr -40 to +85
°C
Storage Temperature Range Tstg -40 to +150
°C
■ ELECTRICAL CHARACTERISTICS (V
+
=3.0V,R
L
=8Ω,f=1kHz,1pin=2V,Ta=25°C,unless otherwise specified)
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Operating Voltage Range V
+
2.0 - 4.5 V
Operating Current I
CC
R
L
=∞,no signal - 2.0 4.0 mA
Power Down Current I
CCD
R
L
=∞ 1pin=0.8V,no signal - 0.1 1.0
µA
Open Loop Gain A
V
1
Amp#A, f<100Hz
80 85 - dB
Closed Loop Gain A
V
2
Amp#B
-0.35 0 +0.35 dB
Output Power P
O
1 THD=10% 110 250 - mW
P
O
2
V
+
=4.5V, R
L
=16Ω, THD=10%
200 400 - mW
Total Harmonic Distortion THD1 P
O
=100mW, G
VD
=6dB - 0.1 0.5 %
THD2
V
+
=4.5V, R
L
=16Ω, P
O
=150mW, G
VD
=6dB
- 0.1 - %
Power Supply Rejection
Ratio
SVR1
C1=∞, C2=0.01µF, DC
50 - - dB
(V
+
=3.0V-4.5V) SVR2
C1=0.1µF, C2 =0
- 35 - dB
SVR3
C1=1.0µF, C2=4.7µF
- 70 - dB
Mute Attenuation MAT f =1kHz-20kHz, 1pin=0.8V - 80 - dB
Output Voltage V
O
1 0.95 1.10 1.25 V
(R
f
=20kΩ, DC)
V
O
2
V
+
=4.5V, R
L
=16Ω
- 1.85 - V
Output High Level V
OH
I
OUT
=-75mA, V
+
=2.0-4.5V - V
+
-1.0 - V
Output Low Level V
OL
I
OUT
=75mA, V
+
=2.0-4.5V - 0.21 - V
Output DC Offset
∆V
O
R
f
=20kΩ, 5pin-8pin
-30 0 +30 mV
Input Bias Current I
B
4pin -100 - 100 nA
Equivalent Resistance R
+IN
3pin 100 170 220
kΩ
R
REF
2pin 18 26 40
kΩ
CD Input Voltage H V
CDH
1pin 2.0 - V
+
V
CD Input Voltage L V
CDL
1pin 0.0 - 0.8 V
CD Input Resistance R
CD
V
+
=V
CD
=4.5V, 1pin 50 85 175
kΩ
■ CONTROL TERMINAL EXPLANATION
CHIP DISABLE CONTROL(CD PIN)
PARAMETER CONTROL SIGNAL STATUS
CD OFF H(=V
CDH
) IC is active.
CD ON L(=V
CDL
) IC is standby. (with Mute)
NJM2770
-
3
-
■ APPLICATION CURCUIT
BIAS
1
2
3
4
8
5
6
7
Ci Ri
C
2
CD(POWER DOWN)
10µF
V
+
=+3V
#A
#
B
4.7µF
INPUT
SPEAKER
8Ω/16Ω
Rf 20kΩ
0.1µF 20kΩ
C
1
1.0µF
TSD
50kΩ
50kΩ
145kΩ
note:1.The CD terminal(1pin) should connect High level(>2.0V), when NJM2770 is active.
The standby mode, when the CD terminal is Low level(<0.8V).
2.To add the C1 and C2 capacitor, the power-supply-rejection-ratio will be improved.
When C1 is large vaiue, C2 will be unnecessary.
3.The power-up time depend on the C1 and C2 capacitor.
4.The input current of CD terminal is as shown below figure.
V
+
1pin
72k
Ω
80k
Ω
GND
5.No connect oscillation-protect RC required.
To connect oscillation-protect RC, if the NJM2770 oscillate with PC board/stray capacitor/long speaker wire
and others condition.
P1-P3P4-P4

NJM2770RB1-TE1

Mfr. #:
Buy NJM2770RB1-TE1
Manufacturer:
NJR (New Japan Radio)
Description:
Audio Amplifiers High Pwr & Low V
Lifecycle:
New from this manufacturer.
Delivery:
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