MAX1575 White LED 1x/1.5x Charge Pump For Main And Sub-Displays

The MAX1575 Charge Pump drives up to four white LEDs in the main Display and up to two white LEDs in the sub-display with regulated constant current for uniform intensity. By utilizing adaptive 1x/1.5x charge-pump modes and very-low-dropout current Regulators it achieves high efficiency over the full 1-cell lithium-battery input voltage range. A 1MHz fixed-frequency switching allows for tiny external components, and the regulation scheme is optimized to ensure low EMI and low input ripple.
The MAX1575 uses an external resistor to set the full-scale 100% LED current. Two enable inputs, ENM and ENS, are used for simple on/off controls for the main and sub-displays, respectively. By repeatedly pulsing either enable input, the LEDs CAN be dimmed in multiple steps down to 5%. Once the desired brightness is set, the MAX1575 maintains that brightness setting as long as the enable input is kept high. If an enable input is kept low for more than 2ms, the LED current for the respective Display is set to zero. If both enable inputs are kept low for more than 2ms, the MAX1575 enters shutdown.
The MAX1575 is available in a 16-pin 4mm x 4mm thin QFN package (0.8mm max height).
By Maxim Integrated Products
MAX1575 's PackagesMAX1575 's pdf datasheet
MAX1575ETET QFN
MAX1575ETE QFN
MAX1575ETE-T QFN




MAX1575 Pinout, Pinouts
MAX1575 pinout,Pin out
This is one package pinout of MAX1575,If you need more pinouts please download MAX1575's pdf datasheet.

MAX1575 Application circuits
MAX1575 circuits
This is one application circuit of MAX1575,If you need more circuits,please download MAX1575's pdf datasheet.


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