The LM27964 is a charge-pump-based white-LED driver designed for mobile phone display backlighting. It can drive up to 6 LEDs in two independently controlled groups (4 for main display, 2 for sub display) plus a dedicated keypad LED driver capable of powering up to 16 LEDs. It features an adaptive 1x/1.5x charge pump and an I2C compatible interface for brightness control.
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Texas Instruments LM27964 technical specifications.
| Input Voltage Range | 2.7 to 5.5V |
| Peak Efficiency | 87% |
| Max Total Output Current | 180mA |
| Max Current per Display LED | 30mA |
| Keypad Driver Current | 80mA |
| Switching Frequency | 700kHz |
| LED PWM Frequency (LM27964SQ-I) | 10kHz |
| LED PWM Frequency (LM27964SQ-C) | 23kHz |
| Current Matching | 0.2% |
| RoHS | Compliant |
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