Overview
Higher output amplification of the car stereo has been generally dependent on boosting voltage of the power supply. The STK4067 supports low-load impedance and is designed for up to 60 W of high output without the need for a power supply voltage booster circuit.

Features
• Superior heat sink capacity using IMST (insulated metal substrate technology)
• Designed for high output while supporting low-load impedance
   ① RL = 1Ω 60 W typ. (EIAJ) 100 W (max.)
   ➁ RL = 2Ω 40 W typ. (EIAJ) 70 W (max.)
   ③ RL = 4Ω 23 W typ. (EIAJ) 40 W (max.)
• Supports sufficient amplifier configurations for high power output
• Low-load impedance driver Supports independent or parallel speaker connections for low-load impedance driving.
• Low distortion
THD = 0.025% typ. (VCC = 13.2 V, RL = 2Ω, Po = 10 W, f = 1 kHz)
Compared with a monolithic IC, with a base frequency of 100 Hz, the following is established: secondary high frequency harmonics switches to –58 dB, with third-order switching to –20 dB, fourth-order to –45 dB, and fifth-order to –18 dB.
• High temperature operation
Provides guaranteed high output to the passenger compartments protected interior even when operating in excessive heat
• Compact heat sink mounting
Supports compact total-set packaging, occupying 1/3 the heat sink area compared of monolithic ICs, and equipped with an 85°C temperature range and 110°C guaranteed case temperature rating
• Low operating power supply voltage range (9 V to 16 V)
• Built-in muting circuit
Short attack time with muting quickly enabled
• Built-in protection circuits
Built-in thermal shutdown and overvoltage protector

Applications
• Power amplifier for car stereos
• Home karaoke systems
• Radio-cassette players