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Part: BA3571FS
Category:
Multimedia
-> Audio
-> Amplifiers
-> Preamplifiers
-> Audio PreAmp/Amp
Description: Headphone Driver For Portable CD Players
Company: ROHM Electronics
Datasheet: Download BA3571FS datasheet File size : 98 kB
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Datasheet text preview:
BA3571F
Audio ICs
Headphone driver for portable CD players
BA3571F
The BA3571F is headphone drivers designed for portable CD players. An oscillation damper is not needed at the headphone output, minimizing external components. Includes a bass boost circuit which enables setting of the bass boost with external components.
!Applications Portable CD players
!Features 1) An external oscillation damper is not needed. 2) Includes a bass boost circuit making it possible to set the bass boost with attached components.
!Absolute maximum ratings (Ta = 25°C)
Parameter Power supply voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 5.5 550 *1 -25~+75 -55~+125 Unit V mW °C °C
*1 Reduced by 5.5mW for each increase in Ta of 1°C over 25°C.
!Recommended operating conditions (Ta = 25°C)
Parameter Power supply voltage Symbol VCC Min. 2.0 Typ. Max. 5.5 Unit V
BA3571F
Audio ICs
!Block diagram
11
VCC
GND
Vcc 1
10 9 8 BB SW 6 7 5 4 2 3 1
Power GND
Out 1
12
Out 2
Vcc 2
13
14
NC
BB SW
NC
15
BB SW
Ripple Filter
RF1
16
17
50k
LP Out
NC
39k
LP NF
IN 1
18
IN 2
Bias in
19
VCC
LP IN
Bias out
Pre GND
20
Pre GND
BA3571F
Audio ICs
!Electrical characteristics _ (unless otherwise noted, Ta = 25°C, VCC = 3V, RL = 16, and f = 1kHz; measurement circuit shown in Fig.1)
Parameter Quiescent current Voltage gain 1 Voltage gain 2 Rated output power Total harmonic distortion Channel balance Output noise voltage 1 Output noise voltage 2 Input resistance Ripple rejection Boost Channel separation
* Not designed for radiation resistance.
Symbol IQ GV1 GV2 POUT THD CB VNO1 VNO2 RIN RR BB CS
Min. 13.5 11.5 20 -1.5 10.8 23 4 52
Typ. 9 15 13 30 0.15 0 -92 -88 13.5 36 6 62
Max. 18 16.5 14.5 1.0 1.5 -88 -84 16.2 8 -
Unit mA dB dB mW % dB dBm dBm k dB dB dB VIN = 0Vrms BB = OFF BB = ON THD = 10%
Conditions
VO = -16dBm VO = -16dBm BB = OFF, IHF - A BB = ON, IHF - A f RR = 100Hz, VRR = -30dBm, BB = OFF f = 100Hz, VIN = -36dBm f = 1kHz, BB = OFF
!Measurement circuit
10k 1µ ~ + 1 2 SW5 A 47 33µ
20
VCC
1 2 SW1 1 2
13k +
19 18
SW3 12
17
+
16
33µ
15 14 13 12
220µ +
11
16 V ~ THD
SW2
RF1 VCC VCC
+ 220µ
50k
Pre GND
39k GND BB SW
THD
8 9 10
1
2
3
4
12 100k 13k 100k 0.1µ ~ + 1µ 10k 1 2 SW6 SW3
5 6 + SW4 2.2µ 5.1k 0.1µ 12
7
+ 0.22µ + 220µ
V ~ 16 1 2 ~ GND
Units Resistors : (±1%) Capacitors : F (±1%) Capacitors (electrolytic) : F (±5%)
Fig. 1
BA3571F
Audio ICs
!Application example
+ LINE OUT 1µ 4.7k
10k
VCC
+ 33µ + 33µ 220µ +
20
19
18
17
16
15
14
13
12
11
RF1 VCC VCC
50k
GND BB SW 1 2 3 4
+ 2.2µ
Pre
39k GND
5
0.1µ
6
+
7
0.22µ
8
9
+ 220µ
10
100k
0.1µ 1µ 4.7k +
100k 5.1k
GND
LINE OUT
10k
Units Resistors : (±5%) Capacitors : F (±10%) Capacitors (electrolytic) : F (±20%)
Fig. 2
!Electrical characteristic curve
!External dimensions (Units: mm)
BA3571F
(dB) VOLTAGE GAIN : GV
30
20 BB OFF BB ON 10
7.8±0.3
20 12.5±0.2 11
0
5.4±0.2
100
1k
10k
FREQUENCY : f (Hz)
1.8±0.1
-10
1
10
0.11
1.27
0.4±0.1
0.3Min. 0.15
Fig. 3 Voltage gain vs. frequency
SOP20
0.15±0.1
Others parts begin by ba
BA-1 BA-2 BA-3 BA-4 BA-5 BA-6 BA-7 BA-8 BA-9 BA-10 BA-11 BA-12 BA-13 BA-14 BA-15 BA-16 BA-17 BA-18
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