The LM3633 is a high-efficiency 11-bit LED driver designed for smartphone handsets. It features a high-voltage inductive boost converter with an integrated 1-A, 40-V MOSFET to power up to three parallel LED strings for display and keypad lighting. Additionally, it integrates a charge pump to bias six low-voltage current sinks (LVLED1-LVLED6) for indicator LEDs with internal pattern generation. The device supports PWM input for content adjustable brightness control (CABC) and is fully programmable via an I2C-compatible interface.
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| Number of channels | 3 |
| Vin (min) | 2.7V |
| Vin (max) | 5.5V |
| Vout (max) | 41V |
| LED current per channel | 30mA |
| Switching frequency (max) | 1100kHz |
| Peak efficiency | 90% |
| Operating temperature range | -40 to 85°C |
| OVP Thresholds | 16, 24, 32, 40V |
| RoHS | Yes |
| REACH | Yes |
Download the complete datasheet for Texas Instruments LM3633 to view detailed technical specifications.
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