LM3550SPX/NOPB
ActiveA FLASH LED DRIVER WITH AUTOMATIC VF AND ESR DETECTION FOR MOBILE CAMERA SYSTEMS
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LM3550SPX/NOPB
ActiveA FLASH LED DRIVER WITH AUTOMATIC VF AND ESR DETECTION FOR MOBILE CAMERA SYSTEMS
Technical Specifications
Parameters and characteristics for this part
| Specification | LM3550SPX/NOPB |
|---|---|
| Applications | Camera Flash |
| Current - Output / Channel | 5 A |
| Dimming | I2C |
| Frequency | 1 MHz |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -30 °C |
| Package / Case | 20-UFQFN Exposed Pad |
| Supplier Device Package | 20-UQFN (3x2.5) |
| Topology | Switched Capacitor (Charge Pump) |
| Type | DC DC Controller |
| Voltage - Output | 5.3 V |
| Voltage - Supply (Max) | 5.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 4500 | $ 0.84 | |
| 9000 | $ 0.81 | |||
| Texas Instruments | LARGE T&R | 1 | $ 1.38 | |
| 100 | $ 1.14 | |||
| 250 | $ 0.82 | |||
| 1000 | $ 0.62 | |||
Description
General part information
LM3550 Series
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. TheEOCpin 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.
