1.2a Dual Flash Led Driver System With I2c Compatible - National Semiconductor

The LM3553 is a fixed frequency, current mode Step-up DC/ DC converter with two regulated current sinks. The device is capable of driving loads up to 1.2A from a single-cell Li-Ion battery. One or more high current Flash LEDs CAN be driven in series either in a high power Flash mode or a lower power Torch mode controlled by either an internal Register or the FEN pin. Additionally a low current (20mA) indicator mode and a fixed output voltage mode are also available. The LM3553 has 128 current levels and 16 Flash safety Timer durations that are user adjustable via an I2C compatible in- terface. Internal soft-start eliminates large inrush currents at start-up. Over-voltage protection circuitry and 1.2MHz switch- ing frequency allow for the use of small, low-cost output capacitors with lower voltage ratings. The LM3553 includes a TX pin that forces Torch mode during a Flash event allowing for synchronization between the RF power Amplifier and Flash Torch modes. It also includes a multi-function pin (M/F) that CAN serve as a GPIO and a hard- ware RESET pin. The LM3553 is available in National's 3mm by 3mm LLP12 package. By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
LM3553SDX/NOPB Texas Instruments 1.2A Dual Flash LED Driver System with I2C Compatible Interface 12-WSON -30 to 85
LM3553SD/NOPB Texas Instruments 1.2A Dual Flash LED Driver System with I2C Compatible Interface 12-WSON -30 to 85
LM3553 's PackagesLM3553 's pdf datasheet



LM3553 Pinout will be updated soon..., now you can download the pdf datasheet to check the pinouts !
LM3553 circuits will be updated soon..., now you can download the pdf datasheet to check the circuits!

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