| TYPE | DESCRIPTION |
|---|
| Mounting Style | Surface Mount |
| Frequency | 1 MHz |
| Number of Pins | 20 Pin |
| Case/Package | UQFN-20 |
| Number of Outputs | 1 Output |
| Output Voltage | 5.3 V |
| Output Current | 5 A |
| Supply Current | 168 µA |
| Quiescent Current | 168 µA |
| Number of Regulated Outputs | 1 Output |
| Switching Frequency | 1.00 MHz |
| Thermal Shutdown | Yes |
| Operating Temperature (Max) | 85 ℃ |
| Operating Temperature (Min) | -30 ℃ |
| TYPE | DESCRIPTION |
|---|
| Product Lifecycle Status | Active |
| Packaging | Tape & Reel (TR) |
| Operating Temperature | -30℃ ~ 85℃ (TA) |
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.
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