LM3555TLX/NOPB
ActiveSYNCHRONOUS BOOST CONVERTER WITH 500 MA HIGH SIDE LED DRIVER AND DUAL-MODE CONTROL INTERFACE
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LM3555TLX/NOPB
ActiveSYNCHRONOUS BOOST CONVERTER WITH 500 MA HIGH SIDE LED DRIVER AND DUAL-MODE CONTROL INTERFACE
Technical Specifications
Parameters and characteristics for this part
| Specification | LM3555TLX/NOPB |
|---|---|
| Applications | Camera Flash |
| Current - Output / Channel | 500 mA |
| Dimming | I2C |
| Frequency | 2 MHz |
| Internal Switch(s) | True |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -30 °C |
| Package / Case | 12-WFBGA |
| Supplier Device Package | 12-DSBGA |
| Topology | Step-Up (Boost) |
| Type | DC DC Regulator |
| Voltage - Output | 9.96 V |
| Voltage - Supply (Max) | 5.5 V |
| Voltage - Supply (Min) [Min] | 2.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Bulk | 675 | $ 0.44 | |
| Cut Tape (CT) | 1 | $ 1.03 | ||
| 10 | $ 0.92 | |||
| 25 | $ 0.87 | |||
| 100 | $ 0.72 | |||
| 250 | $ 0.67 | |||
| 500 | $ 0.59 | |||
| 1000 | $ 0.47 | |||
| Digi-Reel® | 1 | $ 1.03 | ||
| 10 | $ 0.92 | |||
| 25 | $ 0.87 | |||
| 100 | $ 0.72 | |||
| 250 | $ 0.67 | |||
| 500 | $ 0.59 | |||
| 1000 | $ 0.47 | |||
| Tape & Reel (TR) | 3000 | $ 0.44 | ||
| 6000 | $ 0.41 | |||
| 15000 | $ 0.40 | |||
| Texas Instruments | LARGE T&R | 1 | $ 0.76 | |
| 100 | $ 0.58 | |||
| 250 | $ 0.43 | |||
| 1000 | $ 0.31 | |||
Description
General part information
LM3555 Series
The LM3555 is a 2-MHz fixed-frequency, current-mode synchronous boost converter designed to drive either a single flash LED at 500 mA or two series flash LEDs at 400 mA. A high-voltage current source allows the LEDs to be terminated to the GND plane eliminating the need for an additional return trace back to the device.
A dual-mode control interface allows the user to configure the LM3555 with a general-purpose interface using two enable pins for control or an I2C allowing a higher level of control. Both interfaces allow access to the indicator, assist light, and flash modes. A dedicated STROBE pin provides a direct interface to trigger the flash event, while an external TORCH pin provides an additional method for enabling the LEDs in a constant current mode.
The LM3555 can adaptively scale the maximum flash level delivered to the LEDs based upon the flash configuration, whether it be a single LED or two LEDs in series.