The Intersil ISL54004 device is an integrated audio power amplifier system that combines a mono BTL amplifier and stereo headphone amplifiers in a single device. It can operate from a single +2.7V to +5V power supply and is offered in a 20 Ld 4x4 TQFN package. Targeted applications include handheld equipment such as cell-phones, MP3 players, and games/toys.
The Intersil ISL54004 integrates a mono bridge‑tied‑load (BTL) speaker amplifier and two stereo headphone amplifiers in a 20 L × 4 × 4 TQFN package. It operates from a single +2.7 V to +5.5 V supply and is targeted at battery‑powered handheld equipment such as cell phones, MP3 players, and toys.
Key features include programmable four‑level gain, headphone‑sense detection, low‑power shutdown, thermal overload protection, and click‑and‑pop suppression. The datasheet provides pin‑out details, absolute maximum ratings, electrical specifications for 5 V, 3.6 V and 2.7 V supplies, typical application circuits, PCB layout guidance, and performance curves.
| Supply Voltage Range | +2.7 V to +5.5 V |
|---|---|
| Package | 20 L × 4 × 4 TQFN |
| BTL Output Power (5 V) | 800 mW typ, 0.4 % THD+N |
| Headphone Output Power (5 V) | 50 mW typ, 0.3 % THD+N |
| Programmable Gain Levels | 1 V/V, 1.2 V/V, 2 V/V, 4 V/V |
| Low Power Shutdown Current | 26 µA typ |
It operates from a single +2.7 V to +5.5 V supply.
At a 5 V supply it can deliver 800 mW typical output with 0.4 % THD+N.
Yes, the headphone‑sense input circuitry detects jack insertion and switches the audio path automatically.
The ISL54004 provides low‑power shutdown, thermal overload protection, and click‑and‑pop suppression circuitry.