The LP8557 is a high-efficiency LED driver featuring an integrated DC-DC inductive boost converter and six high-precision current sinks. It is designed for tablet LCD backlight applications, supporting a input voltage range of 2.7 V to 5.5 V for single-cell Li-Ion battery use. The device includes adaptive boost voltage control to minimize power consumption and features a proprietary hybrid PWM plus current dimming mode for higher optical efficiency.
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Texas Instruments LP8557 technical specifications.
| Number of Channels | 6 |
| Input Voltage (Min) | 2.7V |
| Input Voltage (Max) | 5.5V |
| Output Voltage (Max) | 28V |
| LED Current per Channel | 25mA |
| Switching Frequency (Max) | 1000kHz |
| Peak Efficiency | 93% |
| Operating Temperature Range | -30 to 85°C |
| RoHS | Compliant |
| REACH | Compliant |
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