Description

  The VAS1086Q is a 10 ~ 400mA programable constant current sink provides cost-effective solution for automotive LED lighting application. 

  The device only needs two external components, a current setting resistor from SET to ground, and a ceramic bypass capacitor from VIN to ground, the monolithic solution lowers system level component counts and significantly improves current accuracy and reliability. The device can be connected in parallel to obtain higher power output. 

  The PWM Pin of the VAS1086Q is a functional reuse Pin, which can be tied to the high voltage, VBAT for example, or let it floating for normal operation, or connect to a micro-controller for PWM dimming.

  VAS1086Q will automatically reduce the output current when the die temperature reached 120¡ãC, this feature avoids LED blinking. The device also integrates over temperature protection. 

Application

• Automotive LED Lighting
• Dome Light£»Door Handles
• Reading Lamp£»Miscellaneous
• Automotive Rear Lamp
• Center High-Mounted£»Stop Lamp
• General-Purpose LED Driver Application

Features

• Qualified for Automotive Applications
• AEC-Q100 Qualified with the following items:
  • Temperature Grade 1: -40 to 125¡æ Ambient Operation Temperature Range
  • Device HBM ESD Class Level H2
  • Device CDM ESD Class Level C3B
  • HTOL Grade Level 1
  • PTC Grade Level 0: -40 ~150¡æ, Toggle Power on/off Every 5 minutes, 1000 cycles
• Max Input Voltage up to 40V
• Low Dropout Voltage (RSET Resistor Voltage Drop Included)
  • Maximum Dropout: 220 mV at 10 mA
  • Maximum Dropout: 340 mV at 70 mA
  • Maximum Dropout: 500 mV at 150 mA
  • Maximum Dropout: 600 mV at 300 mA
• Support up to 20KHz PWM dimming
• Current Roll off when Die temperature over 120¡æ
• Over Temperature Protection function