- 制造厂商:TI
- 产品类别:电源管理
- 技术类目:LED 驱动器 - 背光 LED 驱动器
- 功能描述:同步磁性恒流白光 LED 驱动器
- 点击这里打开及下载LM3508的技术文档资料
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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.
- 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.
- 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
- LED current per channel (mA)
- 30
- Peak efficiency (%)
- 85
- Topology
- Boost
- Features
- OVP
- Operating temperature range (C)
- -30 to 85
LM3508的完整型号有:LM3508TL/NOPB、LM3508TLX/NOPB,以下是这些产品的关键参数及官网采购报价:
LM3508TL/NOPB,工作温度:-30 to 85,封装:DSBGA (YZR)-9,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SNAGCU,TI官网LM3508TL/NOPB的批量USD价格:.386(1000+)
LM3508TLX/NOPB,工作温度:-30 to 85,封装:DSBGA (YZR)-9,包装数量MPQ:3000个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SNAGCU,TI官网LM3508TLX/NOPB的批量USD价格:.186(1000+)
LM3508TLEV — LM3508TL 评估板
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 (...)
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