MP1528

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2.7V-36Vin, 36Vout Boost WLED Driver



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产品描述

The MP1528 is a step up converter designed for driving up to nine (9) series White LEDs (LED) from a single cell Lithium-Ion battery. It regulates the LED current and includes an analog input for varying the LED brightness. The MP1528 uses current limited, variable frequency architecture to regulate the LED current while maintaining high efficiency. The BIAS pin measures the output voltage and turns off the converter if an over voltage condition is present to prevent damage due to an open circuit condition. The LED current is measured with an external current sense resistor. The low 0.4V full-scale regulation threshold and 0.63Ω power switch minimize power loss. The MP1528 is available in an 8 pin MSOP and a tiny 6 pin 3mm x 3mm QFN packages.

产品特性

  • Drives up to 9 Series White LEDs
  • Integrated 0.63Ω Power MOSFET
  • Low 0.4V Full-Scale Current Sense Threshold
  • Over 20mA Output Current Capacity
  • Analog and Digital PWM Brightness Control
  • Open Load Shutdown
  • Soft Start
  • Internal Current Limit
  • Under Voltage Lockout
  • Thermal Shutdown
  • Available in 8 Pin MSOP and Tiny 3mm x 3mm 6 Pin QFN Packages

技术参数

  • Isw Limit (A)0.95
  • Ishutdown (µA)1
  • 最小输入电压2.7
  • Vin (max) (V)36
  • Channels1
  • fsw (min) (kHz)100
  • fsw (max) (kHz)1000
  • Vout (max) (V)36
  • Vfb (V)0.4
  • GradeCatalog
  • Rds(on) (mΩ)630
  • PackageMSOP-8, QFN-6 (3x3), QFN-8 (2x2)
  • Power MOSFETIntegrated
  • TopologyBoost
  • Dimming (Output)P-Dim, A-Dim
  • Iq (mA)0.65
  • Typical LCD Screen SizesSmall (<10")

9 Lamp, 20mA Precision WLED Driver Evaluation Board

The EV1528DQ-00A evaluation board is designed for driving up to nine (9) series WLEDs from a single cell Lithium Ion battery. The board is set up to obtain 20mA LED current. The current can be adjusted by varying the resistor R1.

The MP1528 uses current limited, variable frequency architecture to regulate the LED current while maintaining high efficiency. The BIAS pin measures the output voltage and turns off the converter if an over voltage condition is present to prevent damage due to an open circuit condition. The LED current is measured with an external current sense resistor. The low 0.4V full-scale regulation threshold and 0.4Ω power switch minimize power loss to improve efficiency. Either a DC voltage or a PWM signal at the BRT input can control the LED brightness.

US$ 25.00 + tax