TA7368P

TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA7368P,TA7368F TA7368P / F Audio Power Amplifier The TA7368P and TA7368F are suitable for the audio power amplifier of portable cassette tape recorder and radio. Features · Very few external parts (only three capacitors) · Low quiescent current: ICCQ = 6.6mA (typ.) (VCC = 6V) · Output power TA7368P : Pout = 720mW (typ.) (VCC = 6V, RL = 4Ω, THD = 10%) TA7368P / F : Pout = 450mW (typ.) (VCC = 6V, RL = 8Ω, THD = 10%) · Voltage gain: GV = 40dB (typ.) · Operating supply voltage range: VCC = 2~10V (Ta = 25°C) Block Diagram Vin 1/4 Weight SIP9−P−2.54A : 0.92g (typ.) SSOP10−P−225−1.00 : 0.09g (typ.) RIPPLE 2/5 9/2 RIPPLE FILTER + - 7/10 + +- VCC Pout 3/6 + NF 4/7 PHASE 5/8 6/9 PRE-GND PW-GND RL / : TA7368P / TA7368F 1 2002-10-30 TA7368P / F Precaution For Use And Application 1. Input stage The input stage of power amplifier (equivalent circuit) is comprised of a PNP differential pair (Q2 and Q3) preceded by a PNP emitter follower (Q1) which allows DC referencing of the source signal to ground. This eliminated the need for an input coupling capacitor. However, in case the brush noise of volume becomes a problem, provide serially a coupling capacitor to the input side. / : TA7368P / TA7368F 9/2 Q2 Q3 FROM PIN 7 / 10 R5 R1 27kΩ R4 2. Adjustment of voltage gain The voltage gain is fixed at GV≒40dB by the resistors (R4 and R5) in IC, however, its reduction is possible through adding Rf as shown in F...