Datasheet A80603, A80603-1 (Allegro) - 2

A80603 and LED Driver with Pre-Emptive Boost A80603-1 for Ultra-High Dimming Ratio and Low Output Ripple FEATURES AND BENEFITS (continued) APPLICATIONS
• Excellent input voltage transient response even at lowest • Automotive infotainment backlighting PWM duty cycle • Automotive cluster • Gate driver for optional PMOS input disconnect switch • Automotive center stack • Extensive protection against: • Automotive exterior lighting □ Shorted boost switch, inductor or output capacitor □ Shorted FSET or ISET resistor □ Open or shorted LED pins and LED strings □ Open boost Schottky diode □ Overtemperature
SELECTION GUIDE [1] Part Number Soft Start Timer Package Packing Leadframe Plating
A80603KESJSR 8 ms 24-pin 4 × 4 mm wettable flank QFN with exposed thermal pad and sidewall plating 6000 pieces per reel 100% matte tin A80603KESJSR-1 [2] 16 ms [1] Contact Allegro for additional packing options. [2] Contact Allegro factory for availability of A80603KESJSR-1.
ABSOLUTE MAXIMUM RATINGS [3] Characteristic Symbol Notes Rating Unit
LEDx Pin VLEDx x = 1..4 –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 Continuous –0.6 to 50 V SW VSW t < 50 ns (repetitious, <2.5 MHz) –1.0 to 54 V Single-event in case of Fault [4] –1.5 to 60 V FAULT VFAULT –0.3 to 40 V APWM, EN, PWM, CLKOUT, COMP, DITH, FSET, ISET, VDD, PEB –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 [3] 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. [4] SW DMOS is self-protecting and will conduct when VSW exceeds 60 V.
THERMAL CHARACTERISTICS:
May require derating at maximum conditions; see application information
Characteristic Symbol Test Conditions [5] Value Unit
Package Thermal Resistance RθJA ES package measured on 4-layer PCB based on JEDEC standard 37 °C/W [5] 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 Clock Out Function LED Current Setting PWM Dimming Pre-Emptive Boost (PEB) Analog Dimming with APWM Pin Extending LED Dimming Ratio Analog Dimming with External Voltage VDD Shutdown Fault Detection and Protection LED String Partial-Short Detect Overvoltage Protection Boost Switch Overcurrent Protection Input Overcurrent Protection and Disconnect Switch Setting the Current Sense Resistor Input UVLO Fault Protection During Operation Fault Recovery Mechanism Package Outline Drawing