A80602: High Power LED Driver with Pre-Emptive Boost for Ultra-High Dimming Ratio and Low Output Ripple

The A80602 is a multi-output LED driver for automotive applications such as exterior lighting, heads-up display, and mid-size LCD backlighting. It implements a current-mode boost/ SEPIC converter with gate driver for external N-MOSFET. This allows greater output power even at minimum supply voltage.

The A80602 provides 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. The IC operates from single power supply from 4.5 to 40 V; once started, it can continue to operate down to 4 V. This allows it to withstand stop/start, cold crank, and load dump conditions encountered in automotive systems.

The A80602 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. A higher ratio of 150,000:1 is possible when using a combination of PWM and analog dimming.

Switching frequency can be externally synchronized or programmed between 200 kHz and 2.3 MHz. This allows operation either above or below the AM band. A programmable dithering feature further reduces EMI.

The A80602 provides protection against output short, overvoltage, open- or shorted-LED pin, and overtemperature. A cycle-by-cycle current limit protects the external boost switch against high current overloads. An external P-MOSFET can optionally be used to disconnect input supply in case of output to ground short fault. The A80602-1 is similar to A80602 except it adopts ‘One-Out-All-Out’ fault handling.

 

Featured Applications include:

  • Automotive infotainment backlighting
  • Automotive heads-up display
  • Automotive interior and exterior lighting
DATASHEETS
SAMPLE & BUY
Arrow Electronics (Distributor, Allegro & Sanken Semiconductors)
25 Hub Drive
Melville, NY 11747
Phone: 1-800-777-2776 for local distributor
Web: www.arrow.com

If this is not your local representative, find your local sales rep here.

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  • 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
A80601-2-3 Package
 
 
 
 
 
 
 
 

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Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
APEK80602KES-01-MH DEMO BOARD -20°C to 85°C No -- New Contact your
local sales rep
Check Stock
APEK80602KES-01-MH-1 DEMO BOARD -20°C to 85°C No -- New Contact your
local sales rep
Check Stock
A80602KESJSR 24-lead QFN -40°C to 125°C Yes View Data New Contact your
local sales rep
Check Stock
A80602KESJSR-1 24-lead QFN -40°C to 125°C Yes View Data New Contact your
local sales rep
Check Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

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