LM2754SQ/NOPB
Active800MA SWITCHED CAPACITOR FLASH LED DRIVER WITH TIME-OUT PROTECTION
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LM2754SQ/NOPB
Active800MA SWITCHED CAPACITOR FLASH LED DRIVER WITH TIME-OUT PROTECTION
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Technical Specifications
Parameters and characteristics for this part
| Specification | LM2754SQ/NOPB |
|---|---|
| Applications | Camera Flash |
| Current - Output / Channel | 200 mA |
| Frequency | 1 MHz |
| Internal Switch(s) | True |
| Mounting Type | Surface Mount |
| Number of Outputs | 4 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 24-WFQFN Exposed Pad |
| Supplier Device Package | 24-WQFN (4x4) |
| Topology | Switched Capacitor (Charge Pump) |
| Type | DC DC Regulator |
| Voltage - Output [Max] | 5.1 V |
| Voltage - Output [Min] | 4.7 V |
| Voltage - Supply (Max) | 5.5 V |
| Voltage - Supply (Min) [Min] | 2.8 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 1.97 | |
| 10 | $ 1.77 | |||
| 25 | $ 1.67 | |||
| 100 | $ 1.42 | |||
| 250 | $ 1.33 | |||
| 500 | $ 1.17 | |||
| Digi-Reel® | 1 | $ 1.97 | ||
| 10 | $ 1.77 | |||
| 25 | $ 1.67 | |||
| 100 | $ 1.42 | |||
| 250 | $ 1.33 | |||
| 500 | $ 1.17 | |||
| Tape & Reel (TR) | 1000 | $ 0.82 | ||
| Texas Instruments | SMALL T&R | 1 | $ 1.48 | |
| 100 | $ 1.22 | |||
| 250 | $ 0.88 | |||
| 1000 | $ 0.66 | |||
Description
General part information
LM2754 Series
The LM2754 is an integrated low noise, high current switched capacitor DC/DC converter with four regulated current sinks. The device is optimized for driving 1 to 4 high power white LEDs in parallel with a maximum current of 800mA. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage and current requirements.
Two external low power resistors set the desired current for Torch and Flash modes. The TX pin allows the device to be forced into Torch mode during a Flash pulse, allowing for synchronization between the RF power amplifier pulse and Flash/Torch modes. To protect the device and Flash LEDs, internal Time-Out circuitry turns off the LM2754 in case of a faulty prolonged Flash mode. Internal soft-start circuitry limits the amount of inrush current during start-up.
The LM2754 is available in a small 24-pin thermally enhanced WQFN package.