LA4742

Ordering number : ENN7043 Monolithic Linear IC LA4742 45 W Four-Channel (Bridge Circuit) Power Amplifier Overview The LA4742 is a 45 W 4-channel power amplifier IC for car stereo systems. It features a built-in bridge circuit and the ability to radically reduce the number of external components required. Package Dimensions unit: mm 3236-HZIP25 [LA4742] 29.2 25.6 4.5 Features Maximum output power: 45 W × 4 channels (VCC = 14.4 V, 4 Ω load, 1 kHz) 40 W × 4 channels (VCC = 13.7 V, 4 Ω load, 1 kHz) Requires only seven external components and does not require an oscillation prevention RC circuit, a noise filter, or a BS capacitor. R1.7 14.4 17.4 3.3 10.2 0.4 4.0 4.0 Functions Output offset detection function (DDL) Warning tone (beep) generation function Muting function Built-in standby switch Full complement of built-in protection circuits, including protection from shorting to VCC, shorting to ground, load shorting, overvoltages, and overheating. Maximum supply voltage before damage in the open ground state: 16 V 2.60 2.0 (1.0) 2.0 0.53 SANYO: HZIP25 Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Package thermal resistance Symbol VCC max1 VCC max2 IOpeak Pd max Topr Tstg θjc With an arbitrarily large heat sink Signal present No signal (for 1 minute) Conditions Ratings 18 26 4.5/ch 50 –40 to +85 –40 to +150 1 Unit V V A W °C °C °...