The LM3559 is a 2MHz fixed-frequency synchronous boost converter with two 900 mA constant current drivers for high-current white LEDs. The dual high-side current sources allow for grounded cathode LED operation and can be tied together for providing flash currents of up to 1.8A. An adaptive regulation method ensures the current for each LED remains in regulation and maximizes efficiency.
The LM3559 is controlled via an I2C-compatible interface. Features include: an internal 4-bit ADC to monitor the LED voltage, independent LED current control, a hardware flash enable allowing a logic input to trigger the flash pulse, dual TX inputs which force the flash pulse into a low-current torch mode allowing for synchronization to RF power amplifier events or other high-current conditions, an integrated comparator designed to monitor an NTC thermistor and provide an interrupt to the LED current, an input voltage monitor to monitor low battery conditions, and a flash current scale-back feature that actively monitors the battery voltage and optimizes the flash current during low battery voltage conditions. Additionally, an active high HWEN input provides a hardware shutdown during system software failures.
The 2MHz switching frequency, over-voltage protection and adjustable current limit allow for the use of tiny, low profile (1 µH or 2.2 µH) inductors and (10 µF) ceramic capacitors. The device is available in a ultra-small 16-bump DSBGA package and operates over the -40°C to +85°C temperature range.
产品特性- Dual High-Side Current Sources Allow for Grounded Cathode LED Operation
- Accurate and Programmable LED Current from 28.125 mA to 1.8 A
- Optimized Flash Current During Low Battery Conditions
- Independent LED Current Source Programmability
- >90% Efficiency
- Ultra-Small (Total) Solution Size: <26mm2
- Four Operating Modes: Torch, Flash, Privacy Indicate, and Message Indicator
- 4-Bit ADC for VLED Monitoring
- Battery Voltage Sensing and Current Scale-Back
- LED Thermal Sensing and Current Scale-Back
- Hardware Flash and Torch Enable
- Dual Synchronization Inputs for RF Power Amplifier Pulse Events
- LED and Output Disconnect During Shutdown
- Open and Short LED Detection
- 400-kHz I2C-Compatible Interface
- Active-Low Hardware Reset
- 16-Bump DSBGA
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MUSES01 DIP8
MUSES02 DIP8 双极输入
MUSES03 DIP8 J-FET输入
MUSES8820 DIP8/SOP8 双极输入MUSES8832 SOP8/SSOP8/DFN8双极输入轨至轨输出
MUSES8920 DIP8/SOP8/DFN8J-FET输入
NJM8801 SOP8/SSOP8 双极输入
NJM8901 SOP8
功放/耳机放大器 -音频放大器 全系列JRC日本无线 原厂渠道 可接受订货 价格优势
NJU72065 电子音量控制单端/差分输入 MSOP10/SSOP20
NJM2070 低工作电压 DIP8/DMP8
NJM2073 低工作电压 DIP8/DMP8
NJM2076 低工作电压 DIP8/DMP8
NJM2096 低工作电压 DIP8/DMP8
NJM2113 低工作电压 DIP8/DMP8/SOP8/SIP8/SSOP8/MSOP8
NJM2128 低工作电压电路 DMP16
NJM2135 低工作电压 DIP8/DMP8/SIP8/SSOP8/MSOP8
NJM2149 低工作电压 DIP8/DMP8/SSOP8/MSOP8/
NJM2151A 电子音量控制立体声耳机放大器 DMP20/SSOP20
NJM2166 电子音量控制立体声耳机放大器 SSOP14/MSOP10
NJM2768B 有 固定增益.DMP8/MSOP8
NJM2769B 有 固定增益 DMP8/MSOP8
NJM2770 低工作电压 MSOP8/MSOP8
NJM2775A DMP16
NJM2776 低工作电压 MSOP10(TVSP10)
NJM2777 有 DC電圧制御电子音量控制 DIP14/DMP14/SSOP14
NJM386 DIP8/SIP8/DMP8
NJM386B DIP8/DMP8/SIP8
NJU7082B DMP8/SSOP8
NJU7084 MSOP8
NJU7085 环绕声功能 PCSP32-F7/SSOP32
NJU7086 3输入选择器电子音量控制 LQFP48-R3
NJU7089 低工作电压/单端/差分输入 DFN8/SSOP20/MSOP8/HTSSOP24
NJU72040 无输出电容对应单端输入/差分输入增益 SSOP14
NJW1105 DIP16
NJW1109 有 I2C BUS控制电子音量控制 DIP14/DMP14/SSOP14
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NJM7805S
NJM7808S
NJM7812S
NJM7815S
NJM7824S 正电压类型 TO-252-3 宽温度范围 (-40°C to +125°C)
NJM78L02
NJM78L03
NJM78L05
NJM78L06
NJM78L07
NJM78L08
NJM78L09
NJM78L10
NJM78L12
NJM78L15
NJM78L18
NJM78L20 SOT-89-3/
SOP8 正电压类型
NJM78L24
NJM78LR05 有复位功能 DIP8/DMP8/SIP8/SOT-89-5
深圳市凌晔科技有限公司
广东省深圳市福田区华强广场C座13L
Tel：13544017528
qq：869030400
E-mail：869030400@qq.com
