Datasheet Allegro A80602 — Datenblatt

A80602 and A80602-1
High Power LED Driver with Pre-Emptive Boost
for Ultra-High Dimming Ratio and Low Output Ripple
FEATURES AND BENEFITS DESCRIPTION • Automotive AEC-Q100 qualified
• Enhanced fault handling for ASIL B system compliance
• Wide input voltage range of 4.5 to 40 V for start/stop,
cold crank, and load dump requirements
• Operate in Boost or SEPIC mode for flexible output
• Gate driver for external NMOS to deliver higher output power
• Six integrated LED current sinks, up to 140 mA each
• Boost switching frequency synced externally or
programmed from 200 kHz to 2.3 MHz
• Programmable boost frequency dithering to reduce EMI
• Advanced control allows minimum PWM on-time down
to 0.3 µs, and avoids MLCC audible noises
• LED contrast ratio: 15,000:1 at 200 Hz using PWM
dimming alone, 150,000:1 when combining PWM and
analog dimming
• Excellent input voltage transient response even at lowest
PWM duty cycle
• Gate driver for optional PMOS input disconnect switch
• Extensive fault protection features The A80602 is a multi-output LED driver for automotive
applications such as exterior lighting, heads-up display, and midsize LCD backlighting. It implements a current-mode boost/ …