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The A80602 and A80605 are multi-output LED drivers for automotive applications such as exterior lighting, heads-up display, and mid-size LCD backlighting. They implement a current-mode boost/ SEPIC converter with gate driver for external N-MOSFET. This allows greater output power even at minimum supply voltage.
These devices provide six integrated current sinks driving up to 140 mA per string. Multiple sinks can be paralleled together to achieve higher LED currents up to 840 mA. These ICs operate from single power supply from 4.5 to 40 V; once started, they can continue to operate down to 4 V. This allows them to withstand stop/start, cold crank, and load dump conditions encountered in automotive systems.
The A80602 and A80605 can control LED brightness through external PWM signal. By using the patented Pre-Emptive Boost control, an LED brightness contrast ratio of 15,000:1 can be achieved using PWM dimming at 200 Hz.
The A80605 offers a modified programming range for PEB control, optimized for lower boost switching frequencies (e.g., 400kHz).