Texas Instruments LM3550
The LM3550 device is a low-noise, switchedcapacitor DC-DC converter designed to operate as a current-limited and adjustable (up to 5.3 V) supercapacitor charger. The LM3550 features userselectable 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.| Part No. | LM3550 |
|---|---|
| Datasheet | LM3550 Download |
| Manufacturer |  Texas Instruments |
| Description | 5-A Super-Capacitor Flash LED Driver |
| Buy | Stock & Price |
FEATURES
●1 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) 2
APPLICATIONS
● Digital Still Camera● Voltage Rail Management
● Fire Alarm Notification
● Emergency Strobe Lighting
● Intruder Alert Notification
● Barcode Scanner
● Handheld Data Terminal 3
DESCRIPTION
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 a...
