LM2759SD

• Up to 1A output current
• 解决方案领域 2
• No inductance required
• 90% peak efficiency
• Adaptive 1x, 1.5x and 2x maximum efficiency
• The load is disconnected at the shutdown
• The precise input current is controlled in the gain conversion
• Flash timeout
• The TX input pin ensures synchronization with the RF power amplifier pulses
• Torch, Flash and indicator modes
• Enable the strobe input pin via the external flash
• Strobe input disables through I 2 comet
• Programmable flash pulse duration and pass through me torch and flash current 2 C compatible interface
• Operates at a fixed frequency of 1MHz
• Low Profile 12-Pin LLP (3 × 3 × 0.8 mm)

illustrate

The LM2759 is an integrated, low-noise, high-current switching capacitor DC/DC converter with regulated current source. The unit requires only four small ceramic capacitors in the overall solution area of more than 22 mm or less 2 and height less than 1 mm. The LM2759 drives loads from a single lithium-ion battery with a capacity of 1A. Achieve maximum efficiency Actively select the basis for the positive voltage and current requirements of the LED for the appropriate gain over the input voltage range.

LED currents can be programmed up to 1A through one I 2 C-compatible interface, and 8 selectable flash timeout durations. The high-current flash LED can be driven in either high-power flash mode or low-power flashlight mode. The gating pin allows the module's signal to be switched from the camera flash to a single flash. The flash LED current flare on the TX input pin limits the flash LED current flare at a pulse current level in an RF power amplifier, reducing the high load on the battery. The internal soft-start circuit limits the amount of inrush current at start-up.

The LM2759 is available in a small 12-pin thermally enhanced LLP package.

apply

• Flash on the cellular phone camera