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LM3528

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具有 128 指数调光阶跃的高效、多显示 LED 驱动器

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LM3528

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产品详情

Number of channels 2 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 22 Type Inductive Switching frequency (max) (kHz) 1250 Duty cycle (max) (%) 90 LED current per channel (mA) 20 Peak efficiency (%) 88 Topology Boost Features OVP Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 2 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 22 Type Inductive Switching frequency (max) (kHz) 1250 Duty cycle (max) (%) 90 LED current per channel (mA) 20 Peak efficiency (%) 88 Topology Boost Features OVP Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YFQ) 12 2.52000000000000018 mm² 1.8 x 1.4000000000000001
  • 128 Exponential Dimming Steps
  • Programmable Auto-Dimming Function
  • Up to 90% Efficient
  • Low Profile 12 Bump DSBGA Package (1.2mm x 1.6mm x 0.6mm)
  • Integrated OLED Display Power Supply and LED Driver
  • Programmable Pattern Generator Output for LED Indicator Function
  • Drives up to 12 LED’s at 20mA
  • Drives up to 5 LED’s at 20mA and delivers 18V at 40mA
  • 1% Accurate Current Matching Between Strings
  • Internal Soft-Start Limits Inrush Current
  • True Shutdown Isolation for LED’s
  • Wide 2.5V to 5.5V Input Voltage Range
  • 22V Over-Voltage Protection
  • 1.25MHz Fixed Frequency Operation
  • Dedicated Programmable General Purpose I/O
  • Active Low Hardware Reset

All trademarks are the property of their respective owners.

  • 128 Exponential Dimming Steps
  • Programmable Auto-Dimming Function
  • Up to 90% Efficient
  • Low Profile 12 Bump DSBGA Package (1.2mm x 1.6mm x 0.6mm)
  • Integrated OLED Display Power Supply and LED Driver
  • Programmable Pattern Generator Output for LED Indicator Function
  • Drives up to 12 LED’s at 20mA
  • Drives up to 5 LED’s at 20mA and delivers 18V at 40mA
  • 1% Accurate Current Matching Between Strings
  • Internal Soft-Start Limits Inrush Current
  • True Shutdown Isolation for LED’s
  • Wide 2.5V to 5.5V Input Voltage Range
  • 22V Over-Voltage Protection
  • 1.25MHz Fixed Frequency Operation
  • Dedicated Programmable General Purpose I/O
  • Active Low Hardware Reset

All trademarks are the property of their respective owners.

The LM3528 current mode boost converter offers two separate outputs. The first output (MAIN) is a constant current sink for driving series white LED’s. The second output (SUB/FB) is configurable as a constant current sink for series white LED bias, or as a feedback pin to set a constant output voltage for powering OLED panels.

As a dual output white LED bias supply, the LM3528 adaptively regulates the supply voltage of the LED strings to maximize efficiency and insure the current sinks remain in regulation. The maximum current per output is set via a single external low power resistor. An I2C compatible interface allows for independent adjustment of the LED current in either output from 0 to max current in 128 exponential steps. When configured as a white LED + OLED bias supply the LM3528 can independently and simultaneously drive a string of up to 6 white LED’s and deliver a constant output voltage of up to 21V for OLED panels.

Output over-voltage protection shuts down the device if VOUT rises above 22V allowing for the use of small sized low voltage output capacitors. Other features include a dedicated general purpose I/O (GPIO) and a multi-function pin (HWEN/PGEN/GPIO) which can be configured as a 32 bit pattern generator, a hardware enable input, or as a GPIO. When configured as a pattern generator, an arbitrary pattern is programmed via the I2C compatible interface and output at HWEN/PGEN/GPIO for indicator LED flashing or for external logic control. The LM3528 is offered in a tiny 12-bump DSBGA package and operates over the -40°C to +85°C temperature range.

The LM3528 current mode boost converter offers two separate outputs. The first output (MAIN) is a constant current sink for driving series white LED’s. The second output (SUB/FB) is configurable as a constant current sink for series white LED bias, or as a feedback pin to set a constant output voltage for powering OLED panels.

As a dual output white LED bias supply, the LM3528 adaptively regulates the supply voltage of the LED strings to maximize efficiency and insure the current sinks remain in regulation. The maximum current per output is set via a single external low power resistor. An I2C compatible interface allows for independent adjustment of the LED current in either output from 0 to max current in 128 exponential steps. When configured as a white LED + OLED bias supply the LM3528 can independently and simultaneously drive a string of up to 6 white LED’s and deliver a constant output voltage of up to 21V for OLED panels.

Output over-voltage protection shuts down the device if VOUT rises above 22V allowing for the use of small sized low voltage output capacitors. Other features include a dedicated general purpose I/O (GPIO) and a multi-function pin (HWEN/PGEN/GPIO) which can be configured as a 32 bit pattern generator, a hardware enable input, or as a GPIO. When configured as a pattern generator, an arbitrary pattern is programmed via the I2C compatible interface and output at HWEN/PGEN/GPIO for indicator LED flashing or for external logic control. The LM3528 is offered in a tiny 12-bump DSBGA package and operates over the -40°C to +85°C temperature range.
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类型 标题 下载最新的英语版本 日期
* 数据表 LM3528 HE, Multi-dsplay LED Drvr w/128 Exp Dim Steps & OLED PS 数据表 (Rev. B) 2013年 5月 3日
白皮书 常见 LED 功能和 LED 驱动器设计注意事项 英语版 2020年 9月 21日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
应用手册 Analog PWM Dimming in White-LED Drivers 2016年 12月 21日
EVM 用户指南 AN-1823 LM3528 Evaluation Board (Rev. A) 2013年 4月 30日

设计和开发

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评估模块 (EVM) 用 GUI

SNVC047 — LM3528 Graphical User Interface

支持的产品和硬件

支持的产品和硬件

产品
背光 LED 驱动器
LM3528 — 具有 128 指数调光阶跃的高效、多显示 LED 驱动器
硬件开发
评估板
LM3528TMEV — LM3528TM 评估板
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包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
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  • 制造厂地点
  • 封装厂地点

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