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Lumissil IS32LT3961 LED Lighting Driver

Lumissil IS32LT3961 LED Lighting Driver integrates an N-channel MOSFET to operate in a buck configuration. This lighting driver works in a fixed frequency mode during switching. The external resistor connects the VCC and TON pins to configure the on-time (switching frequency). The RIS, an external high-side resistor, sets a constant LED output current, allowing the output voltage to be automatically adjusted for various LED configurations. This IS32LT3961 driver is available in an eTSSOP-16 package with an exposed pad for enhanced thermal dissipation and is AEC-Q100 qualified. The LED brightness is proportional to the voltage level of the analog signal or the duty cycle of the PWM signal.

This IS32LT3961ZLA3TR LED lighting driver features a cycle-by-cycle current limit, integrated high-side MOSFET switch, and analog dimming for LED binning or thermal roll-off protection. The IS32LT3961ZLA3TR LED lighting driver operates at 5V to 60V input voltage supply, -40°C to 150°C operating temperature range, and 2A output current. This IS32LT3961ZLA3TR LED lighting driver is ideally used in matrix headlights,
daytime running lights, and motorcycle headlights.

Features

  • High-side current sensing with LED string cathode connected directly to GND
  • Cycle-by-cycle current limit
  • Integrated high-side MOSFET switch
  • PWM dimming capability
  • Analog dimming for LED binning or thermal roll-off protection
  • Internal control loop compensation
  • Under Voltage Lockout (UVLO)
  • Spread spectrum to optimize EMI
  • Support an output current monitor signal
  • Robust fault protection and reporting function:
    • Single LED short detect
    • LED string open/short
    • LED over temperature thermal roll-off
    • Pin-to-GND short
    • Component open/short faults
    • Adjacent pin-to-pin short
    • Thermal shutdown
  • AEC-Q100 qualified

Specifications

  • 5V to 60V input voltage range
  • 2A output current
  • 6V output voltage
  • 150°C junction temperature
  • 2.74W power dissipation
  • -40°C to 150°C operating temperature range
  • -65°C to 150°C storage temperature range

Applications

  • Matrix headlight
  • Daytime running lights
  • Turn/stop lights
  • Front and rear fog lights
  • Map light
  • Motorcycle headlight

Block Diagram

Block Diagram - Lumissil IS32LT3961 LED Lighting Driver

Typical Application Circuit Diagram

Application Circuit Diagram - Lumissil IS32LT3961 LED Lighting Driver
公開: 2023-05-11 | 更新済み: 2023-06-05