EV3371-R-00A
8-Channel, Synchronous Boost WLED Driver with I2C Interface
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製品説明
The EV3371-R-00A is an evaluation board designed for the MP3371, a synchronous boost converter with eight current channels designed
to drive WLED arrays for LCD panels in tablets and notebook backlighting applications.
The MP3371 uses peak current mode and pulse-width modulation (PWM) control to regulate the boost converter. The MP3371 employs a standard I2C digital interface to set the operation mode, switching frequency, fullscale current for each channel, sync or nonsync mode, dimming mode and duty, and various protection thresholds.
The MP3371 features high efficiency due to low-headroom voltage for LED regulation and a small on resistance of the switching MOSFET. The synchronous rectifier saves PCB size and total BOM cost.
The MP3371 is available in a QFN-24 (4mmx4mm) package.
製品の特長
- 8 Channels with Maximum 50mA/Channel
- Synchronous Converter with 50V LS-FET/HS-FET with 155m/235mΩ On Resistance
- 3V to 30V Input Voltage Range
- 470mV LED Regulation Voltage at 20mA
- Max 2.5% Current Matching
- 350kHz, 500kHz, 650kHz, 800kHz, 950kHz, or 1.2MHz Selectable Switching Frequency
- A1 Pins for Two I2C Addresses
- 0mA to 50mA Full-Scale LED Current, 8-Bit, 0.196mA/Step
- Selectable Sync or Non-Sync Mode
- Multi-Dimming Operation Mode Including:
- Analog Dimming through External PWM Input or I2C Interface, 10-Bit Resolution
- PWM Dimming through External PWM Input or I2C Interface, 14-Bit Resolution
- Mixed Dimming Mode through External PWM Input or I2C Interface with 6.25%, 12.5%, 25%, or 50% Transfer Point, 14- Bit PWM Duty Resolution
- Linear Smooth Dimming with 2μs, 4μs, 8μs, 16μs, 32μs, 64μs, or 128μs Step-Slope Set
- LED Short/Open, OTP, OCP, Inductor or Diode Short Protection
- 2.5V, 5V, 7.5V, or 10V LED Short Threshold
- 24V, 31V, 37.5V, or 45V OVP Threshold
- 1.8A or 2.5A Current Limit
- Cascade Function to Share Power Stage
- Available in a QFN-24 (4mmx4mm) Package
パラメータ
8-Channel, Synchronous, 50V Boost WLED Driver with I2C Interface
The MP3371 is a synchronous boost converter with eight current channels designed to drive WLED arrays for LCD panels in tablets and notebook backlighting applications.
The MP3371 uses peak current control mode and pulse-width modulation (PWM) control to maintain boost converter regulation. The MP3371 employs a standard I2C digital interface to set the operation mode, switching frequency, full-scale current for each channel, sync or non-sync mode, dimming mode and duty, and various protection thresholds.
The MP3371 features high efficiency due to low-headroom voltage for LED regulation and a small on resistance of the switching MOSFET. The synchronous rectifier saves PCB size and total BOM cost.
The MP3371 is available in a QFN-24 (4mmx4mm) package.
Advantages Include:
- Highly integrated to save BOM cost and PCB size
- Variety of dimming methods and good dimming performance (10000:1 dimming ratio at 100Hz)
- LED open/short, inductor/diode short, OTP, adjacent pin short protections
- I2C for flexible application
- Phase shift to reduce audible noise
- Auto-switching function to boost the efficiency at light load (MP3372)
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