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LM3508

現行

同步磁性定電流白光 LED 驅動器

立即訂購
產品規格表

LM3508

現行
產品規格表 立即訂購

產品詳細資料

Number of channels 1 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 10 Vout (max) (V) 17.5 Type Inductive Switching frequency (max) (kHz) 850 Duty cycle (max) (%) 91 LED current per channel (mA) 30 Peak efficiency (%) 85 Topology Boost Features OVP Operating temperature range (°C) -30 to 85 Rating Catalog
Number of channels 1 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 10 Vout (max) (V) 17.5 Type Inductive Switching frequency (max) (kHz) 850 Duty cycle (max) (%) 91 LED current per channel (mA) 30 Peak efficiency (%) 85 Topology Boost Features OVP Operating temperature range (°C) -30 to 85 Rating Catalog
DSBGA (YZR) 9 3.0625 mm² 1.75 x 1.75
  • Drives 4 Series White LEDs with up to 30mA
  • >80% Peak Efficiency
  • Up to 100kHz PWM Brightness Control
  • Accurate ±5% LED Current Regulation across VIN range
  • Internal Synchronous PFET (No Schottky Diode Required)
  • True Shutdown Isolation
  • Output Short-Circuit Protection
  • 17.5V Over-Voltage Protection
  • Internal Soft-Start Eliminates Inrush Current
  • Wide Input Voltage Range: 2.7V to 5.5V
  • 850kHz Fixed Frequency Operation
  • Low Profile 9-Bump DSBGA Package (1.514mm x 1.514mm x 0.6mm)

All trademarks are the property of their respective owners.

  • Drives 4 Series White LEDs with up to 30mA
  • >80% Peak Efficiency
  • Up to 100kHz PWM Brightness Control
  • Accurate ±5% LED Current Regulation across VIN range
  • Internal Synchronous PFET (No Schottky Diode Required)
  • True Shutdown Isolation
  • Output Short-Circuit Protection
  • 17.5V Over-Voltage Protection
  • Internal Soft-Start Eliminates Inrush Current
  • Wide Input Voltage Range: 2.7V to 5.5V
  • 850kHz Fixed Frequency Operation
  • Low Profile 9-Bump DSBGA Package (1.514mm x 1.514mm x 0.6mm)

All trademarks are the property of their respective owners.

The LM3508 is a synchronous boost converter (no external Schottky diode required) that provides a constant current output. It is designed to drive up to 4 series white LEDs at 30mA from a single-cell Li-Ion battery. A single low power external resistor is used to set the maximum LED current. The LED current can be adjusted by applying a PWM signal of up to 100kHz to the DIM pin. Internal soft-start circuitry is designed to eliminate high in-rush current at start-up. For maximum safety, the device features an advanced short-circuit protection when the output is shorted to ground. Additionally, over-voltage protection and an 850kHz switching frequency allow for the use of small, low-cost output capacitors with lower voltage ratings. During shutdown, the output is disconnected from the input preventing a leakage current path through the LEDs to ground. The LM3508 is available in a tiny 9-bump chip-scale DSBGA package.

The LM3508 is a synchronous boost converter (no external Schottky diode required) that provides a constant current output. It is designed to drive up to 4 series white LEDs at 30mA from a single-cell Li-Ion battery. A single low power external resistor is used to set the maximum LED current. The LED current can be adjusted by applying a PWM signal of up to 100kHz to the DIM pin. Internal soft-start circuitry is designed to eliminate high in-rush current at start-up. For maximum safety, the device features an advanced short-circuit protection when the output is shorted to ground. Additionally, over-voltage protection and an 850kHz switching frequency allow for the use of small, low-cost output capacitors with lower voltage ratings. During shutdown, the output is disconnected from the input preventing a leakage current path through the LEDs to ground. The LM3508 is available in a tiny 9-bump chip-scale DSBGA package.
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類型 標題 日期
* Data sheet LM3508 Synchronous Magnetic Constant Current White LED Driver datasheet (Rev. C) 2013年 5月 3日
White paper Common LED Functions and LED Driver Design Considerations 2020年 9月 21日
Application note Analog PWM Dimming in White-LED Drivers 2016年 12月 21日

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