Arques announces Dual-channel Current-regulated White LED Drivers - FAQ, advises, how-to, reviews, selections, online sales

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Arques announces Dual-channel Current-regulated White LED Drivers Arques Technology introduces new members to its expanding family of white LED drivers; the AQ9132A, AQ9132B, AQ9133A, AQ9133B, AQ9142A, and AQ9142B. These two channel, adaptable dual-gain 1X - 1.5X charge pump current regulators are ideal for white LED backlighting for small LCD displays or photo flash applications. The channel drivers are arranged in 3+2 (AQ9132) 3+3 (AQ9133) or 4+2 (AQ9142).They drive parallel white LEDs, with up to 120 mA total of programmable output current. Each LED’s driver current is matched to within 2% for uniform LED intensity and color. They operate over the Li-Ion input voltage range of 2.7V to 6.0V, with undervoltage lockout. They feature a fixed 650 kHz frequency. In full shutdown mode, they draw only 10 uA.

They feature an efficient, inductor-less, 1.5X charge-pump circuit that uses only a few ceramic capacitors, allowing a compact, low profile design. Each channel has independent enables, plus a system enable. The LED brightness in each channel can be adjusted by applying a PWM signal to the channel. The B series offers independent LED current programming for each channel via the ISET1 and ISET2 pins. The A series programs both channels with a single resistor.

They offer unique performance advantages over previously available devices, allowing the highest level of efficiency. Proprietary design architecture (patent pending) automatically selects the most efficient charge-pump ratio to maintain high efficiency over a broad input voltage range. Internal over-temperature and over-current management provides short circuit protection.

They are packaged in a small MLP-16, with optional Green (halogen-free, Pb-free) packaging.

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