2.7V-5.5Vin, 1.5A, Synchronous Boost WLED Driver for Tablet and Smart Phone
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The MP3309 is a WLED step-up converter for 2.7V-to-5.5V input that uses peak-current mode to regulate the LED current sensed through an external, low-side resistor. The 200mV feedback voltage and synchronous rectification reduces power loss and reduces PCB space requirements. For non-synchronous mode, setting an internal register can disable the rectifier MOSFET to save driver losses.
The MP3309 features a programmable switching frequency to optimize efficiency. It supports both analog and PWM dimming.
In addition, the MP3309 has LED open protection, cycle-by-cycle current limit protection, Under voltage protection and thermal shutdown protection -. The I2C interface can set the protection indication bits and over-voltage protection point.
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- 2.7V-to-5.5V Input Voltage
- Analog and PWM Dimming
- Selectable Synchronous or Non-synchronous Mode
- 400kHz I2C-Compatible Interface
- Digitally-Set LED Current
- Programmable Switching Frequency
- Programmable Over VoltageProtection Point
- Low 200mV Feedback Voltage with ±1%
- Software- or Hardware-Enable Function
- Internal Soft Start
- UVLO, Thermal Shutdown, OCP
- Available in a 1.4mm ×1.8mm QFN-10 package
- MP3309—Default Analog Dimming (PWMH) by external PWM signal input
- MP3309C—Default I2C Interface
EV3309-QG-00A Evaluation Kit 40mA, Synchronous Boost White LED Driver with I2 C Interface Evaluation Board
The EV3309-QG-00A is designed for the MP3309, a WLED driver. The device has a 2.7V to 5.5V input voltage range and uses peak current mode control to regulate the LED current sensed through an external, low-side resistor. Synchronous rectification and the 200mV feedback voltage reduce power loss and PCB size. To save driver losses, select non-synchronous mode by using an internal register to disable the rectifier MOSFET.
The MP3309 features a configurable switching frequency to optimize efficiency. It supports both analog and PWM dimming. In addition, the MP3309 has LED open protection, cycle-by-cycle current limit protection, under-voltage protection (UVP), and thermal shutdown protection.
The I2C interface can set the protection indication bits and the over-voltage protection (OVP) threshold.
The MP3309 is available in a QFN-10 (1.4mmx1.8mm) package