LA4743B

Ordering number : ENN6630 Monolithic Linear IC LA4743B 45 W Four-Channel (Bridge Circuit) Power Amplifier Overview The LA4743B 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. It is also pin compatible with the LA4743A, which differs in the amount of gain provided. Package Dimensions unit: mm 3236-HZIP25 [LA4743B] 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 2.60 2.0 (1.0) 2.0 0.53 Functions 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. 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 °C/W Any and all SANYO products described or contained herei...