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LM3550

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具有自動 Vf 和 ESR 檢測功能的 LED 閃光燈驅(qū)動器，適用于移動攝像機(jī)系統(tǒng)

產(chǎn)品詳情

Input voltage type Linear Topology Charge pump Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (max) (V) 5.3 Vout (min) (V) 4.5 Iout (max) (A) 5 Iq (typ) (mA) 0.168 Features OVP Operating temperature range (°C) -30 to 85 Dimming method Analog, PWM Number of channels 1 Rating Catalog
Input voltage type Linear Topology Charge pump Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (max) (V) 5.3 Vout (min) (V) 4.5 Iout (max) (A) 5 Iq (typ) (mA) 0.168 Features OVP Operating temperature range (°C) -30 to 85 Dimming method Analog, PWM Number of channels 1 Rating Catalog
UQFN (NHU) 20 7.5 mm2 3 x 2.5
  • Up to 5 A Flash Current
  • 4 Selectable Super-Capacitor Charge Voltage Levels (4.5 V, 5 V, 5.3 V, Optimized)
  • Adjustable Torch Current (60 mA to 200 mA)
  • Ambient Light or LED Thermal Sensing With Current Scaleback
  • Dedicated Indicator LED Current Source
  • No Inductor Required
  • Programmable Flash Pulse Duration, and Torch and Flash Currents via I2C-Compatible Interface
  • True Shutdown (LED Disconnect)
  • Flash Timeout Protection
  • Low Profile 20-Pin UQFN Package
    (3 mm × 2.5 mm × 0.8 mm)
  • Up to 5 A Flash Current
  • 4 Selectable Super-Capacitor Charge Voltage Levels (4.5 V, 5 V, 5.3 V, Optimized)
  • Adjustable Torch Current (60 mA to 200 mA)
  • Ambient Light or LED Thermal Sensing With Current Scaleback
  • Dedicated Indicator LED Current Source
  • No Inductor Required
  • Programmable Flash Pulse Duration, and Torch and Flash Currents via I2C-Compatible Interface
  • True Shutdown (LED Disconnect)
  • Flash Timeout Protection
  • Low Profile 20-Pin UQFN Package
    (3 mm × 2.5 mm × 0.8 mm)

The LM3550 device is a low-noise, switched-capacitor DC-DC converter designed to operate as a current-limited and adjustable (up to 5.3 V) super-capacitor charger. The LM3550 features user-selectable termination voltages and provides one adjustable constant current output (up to 200 mA) and one NFET controller ideal for driving one or more high-current LEDs in a high-power flash mode or a low-power torch mode.

The LED current and flash pulse duration of the LM3550 can be programmed via an I2C-compatible interface. The STROBE pin allows the flash to be toggled via a flash-enable signal from a controller or camera module. The EOC pin sinks current when the output voltage reaches 95% of the final value.

The ALD/TEMP input pin allows either a light sensor to adjust the flash-current level based on the ambient light conditions, or it allows for over-temperature detection and protection of the LED during high-power operation or high ambient-temperature conditions.

For all available packages, see the orderable addendum at the end of the data sheet.

The LM3550 device is a low-noise, switched-capacitor DC-DC converter designed to operate as a current-limited and adjustable (up to 5.3 V) super-capacitor charger. The LM3550 features user-selectable termination voltages and provides one adjustable constant current output (up to 200 mA) and one NFET controller ideal for driving one or more high-current LEDs in a high-power flash mode or a low-power torch mode.

The LED current and flash pulse duration of the LM3550 can be programmed via an I2C-compatible interface. The STROBE pin allows the flash to be toggled via a flash-enable signal from a controller or camera module. The EOC pin sinks current when the output voltage reaches 95% of the final value.

The ALD/TEMP input pin allows either a light sensor to adjust the flash-current level based on the ambient light conditions, or it allows for over-temperature detection and protection of the LED during high-power operation or high ambient-temperature conditions.

For all available packages, see the orderable addendum at the end of the data sheet.
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類型 標(biāo)題 下載最新的英語版本 日期
* 數(shù)據(jù)表 LM3550 5-A Super-Capacitor Flash LED Driver 數(shù)據(jù)表 (Rev. C) PDF | HTML 2016年 10月 19日
白皮書 常見 LED 功能和 LED 驅(qū)動器設(shè)計(jì)注意事項(xiàng) 英語版 2020年 9月 21日
選擇指南 電源管理指南 2018 (Rev. K) 2018年 7月 31日
選擇指南 電源管理指南 2018 (Rev. R) 2018年 6月 25日

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參考設(shè)計(jì)

TIDA-00376 — 壓電式揚(yáng)聲器頻閃燈通知參考設(shè)計(jì)

TIDA-00376 使用我們的工業(yè)壓電式驅(qū)動器、閃光燈 LED 驅(qū)動器和超低功耗 FRAM 微控制器 (MCU) 來演示聽覺和視覺通知子系統(tǒng)的實(shí)現(xiàn)方式，這些子系統(tǒng)主要應(yīng)用于火災(zāi)警報(bào)終端設(shè)備系統(tǒng)。該參考設(shè)計(jì)展示了通過單個(gè)壓電傳感器和一個(gè)低輸入電流和高光輸出 LED 頻閃燈生成的多警報(bào)音頻率輸出。
用戶指南: PDF
原理圖: PDF
英語版 (Rev.A): PDF
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UQFN (NHU) 20 Ultra Librarian

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  • 引腳鍍層/焊球材料
  • MSL 等級/回流焊峰值溫度
  • MTBF/時(shí)基故障估算
  • 材料成分
  • 鑒定摘要
  • 持續(xù)可靠性監(jiān)測
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