The MAX1698EUB+ is a high-efficiency step-up current regulator for LEDs in 10 pin μMAX package. It is an efficient driver for white or colour LEDs. It is ideal for large LED backlit displays in PDAs and laptop computers. Numerous benefits include greater simplicity, lower cost, higher efficiency, longer bulb life and greater reliability when compared to fluorescent (CCFL) and electroluminescent (EL) lamps. The MAX1698 is a switch-mode boost controllers in which LED current, rather than output voltage is regulated. The device drives series-connected LEDs with a controlled current that is measured with a typically 15ohm sense resistor, not an expensive fractional-ohm value. LED current control and dimming are accomplished with an adjust input (ADJ). For larger light output, multiple LED banks can be connected in parallel with up to 5W total output power.
- Supply voltage range is 2.7V to 5.5V
- Operating temperature range from -40°C to 85°C
- Lossless, adjustable LED brightness
- Over 90% efficiency
- CS trip current is 2.4A
- Quiescent supply current is 260μA
- Losses are minimized by a low 300mV current-sense threshold
电源管理, 便携式器材
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