MP3309C
New
2.7V-5.5Vin, 1.5A, Synchronous Boost WLED Driver with I2C Interface 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.
Product Features
- 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
- Default I2C Interface
Parametrics
- Isw Limit (A)1.5
- Ishutdown (µA)1
- Vin (min) (V)2.7
- Vin (max) (V)5.5
- Channels1
- fsw (min) (kHz)300
- fsw (max) (kHz)1200
- Vout (max) (V)35
- Vfb (V)0.2
- GradeCatalog
- Rds(on) (mΩ)300
- PackageQFN-10 (1.4x1.8)
- Power MOSFETIntegrated
- TopologyBoost
- Dimming (Output)P-Dim, A-Dim
- Iq (mA)0.42
- Typical LCD Screen SizesSmall (<10")
- Other FeaturesCABC, I2C, Sync Rectification
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