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LED driver chip boasts efficient backlighting

Edited by the Electronicstalk editorial team Sep 13, 2004

The FAN5607 is a constant current parallel LED driver that provides analogue and/or PWM brightness control for LCD backlighting in ultraportable applications.

The FAN5607 is a constant current parallel LED driver that provides analogue and/or PWM brightness control for LCD backlighting in ultraportable applications.

The FAN5607 has a three-mode charge pump and reaches industry-leading 93% peak efficiency.

Internal auto-sense circuitry maintains high efficiency, even when driving fewer than the maximum of four LEDs, and ensures very tight current matching over the full range of the LEDs' current.

In addition to providing very high peak efficiency, the internal circuitry of the FAN5607 saves space and simplifies designs when compared to competitive parts that require an external control signal to maintain efficiency when driving fewer than four LEDs.

To further reduce space in handheld designs, the FAN5607 is offered in one of the smallest packages available in the industry, a 4x4 MLP (moulded leadless package).

"The latest cellphones, handheld computers, PDAs and other ultraportable products demand high efficiency in increasingly smaller applications", said Tivadar Szabo, Marketing Manager of the Power Management Group.

"The FAN5607 LED driver addresses these design challenges by minimising power, providing 93% peak efficiency and saving board space with its MLP packaging".

"'Noise' - another important design concern in cellphones - is mitigated by the FAN5607's ability to decrease EMI and ripple problems".

The FAN5607 offers built-in overvoltage protection and features shutdown mode, soft-start and short-circuit protection.

Low ground current and shutdown mode extend battery life and increase reliability.

The packaging of the FAN5607 also complies with the industry's desire to manufacture more environmentally beneficial products.

This lead-free (Pb-free) product meets or exceeds the requirements of the joint IPC/JEDEC standard J-STD-020B and is compliant with the European Union requirements, which will take effect in 2005.