Description
   The SKY81298 is a high-efficiency, high-current boost converter with three independently programmable constant current outputs. The device is optimized for LED flash applications implementing tri-tone flash LED color compensation, or dual rear LED flash plus single front LED flash to support “selfie” pictures taken from the front-facing camera. The SKY81298 uses a single DC/DC boost and only one inductor to support all three LED outputs, and all LED outputs may be enabled simultaneously to support up to a total of 2.4 A total LED current.

FEATUREs
• Input voltage range: 2.5 V to 5.5 V
• Each channel can program up to 1.5 A with 12 mA step size;
   up to 2.4 A total combined output current
• > 90% LED efficiency at 250 mA (3.3 V < VIN < 3.6 V,
   VF = 3.3 V);
   > 85% LED efficiency at 1 A (3.4 V< VIN < 3.9 V, VF = 3.3 V)
• 2.75 MHz switching frequency
• Soft-start and input current limit
• Separate flash enable/flash inhibit
• Programmable blinking LED notification
• Industry standard 1 MHz I2C programming
   – Flash and Movie mode current
   – Input voltage monitor with programmable thresholds
   – Current read-back in input voltage monitor operation
   – Programmable safety timer
   – Fault read back
• Fault protection
   – Integrated safety timer
   – Over-voltage (open LED, open circuit)
   – Short circuit
   – Over-temperature protection
   – Flash mode input voltage monitor
   – Open-drain fault output
• Temperature range: −40 °C to +85 °C
• Small WLCSP (16-bump, 1.903 x 1.903 x 0.605 mm, 0.4 mm
   pitch) package (MSL1, 260 °C per JEDEC J-STD-020)