Datasheet A80602, A80602-1 (Allegro) - 2

A80602 and High Power LED Driver with Pre-Emptive Boost A80602-1 for Ultra-High Dimming Ratio and Low Output Ripple DESCRIPTION (continued)
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 (See Fault Table section for details).
SELECTION GUIDE [1] Part Number Fault Handling LED Driver Package Packing
A80602KESJSR One-Out-Continue 6 × 140 mA 24-pin 4 × 4 mm wettable flank QFN with exposed thermal pad and sidewall plating 6000 pieces per reel A80602KESJSR-1 One-Out-All-Out [1] Contact Allegro for additional packing options.
ABSOLUTE MAXIMUM RATINGS [2] Characteristic Symbol Notes Rating Unit
LEDx Pin VLEDx x = 1..6 –0.3 to 40 V OVP pin VOVP –0.3 to 40 V VIN VIN –0.3 to 40 V Higher of –0.3 VSENSE, GATE VSENSE, V and (VIN – 7.4) to V GATE VIN +0.4 VDRV, GDRV VDRV, VGDRV –1.0 to 7.5 V CS VCS –0.3 to 7 V EN/PWM, FAULT, ADIM, COMP, DITH, PEB, FSET, ISET, VDD External input signals must not be higher than VIN + 0.4 V –0.3 to 5.5 V Operating Ambient Temperature TA Range K –40 to 125 °C Maximum Junction Temperature TJ(max) 150 °C Storage Temperature Tstg –55 to 150 °C [2] Stresses beyond those listed in this table may cause permanent damage to the device. The absolute maximum ratings are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the Electrical Characteristics table is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
THERMAL CHARACTERISTICS:
May require derating at maximum conditions; see application information
Characteristic Symbol Test Conditions [4] Value Unit
Package Thermal Resistance RθJA ES package measured on 4-layer PCB based on JEDEC standard 37 °C/W [4] Additional thermal information available on the Allegro website. Allegro MicroSystems, LLC 2 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Document Outline Features and Benefits Description Applications Package Selection Guide Absolute Maximum Ratings Thermal Characteristics Typical Application – SEPIC Functional Block Diagram Pinout Diagram and Terminal List Electrical Characteristics Functional Description Enabling the IC Powering Up: LED Detection Phase Powering Up: Boost Output Undervoltage Soft Start Function Frequency Selection Synchronization Loss of External Sync Signal Switching Frequency Dithering LED Current Setting PWM Dimming Pre-Emptive Boost (PEB) Analog Dimming ADIM Mode APWM Mode Extending LED Dimming Ratio Analog Dimming with External Voltage VDD VDRV Shutdown Fault Detection and Protection FAULT Status LED String Partial-Short Detect Overvoltage Protection Boost Switch Overcurrent Protection Input Overcurrent Protection and Disconnect Switch Setting the Input Current Sense Resistor Input UVLO Fault Protection During Operation Package Outline Drawing Appendix: External MOSFET Selection Guide