IS32LT3125

Status Sample
Vdd(V) 5~42
Dimming PWM & BCM
Channels 1
Document
IOUT(mA) 2501mA in Fault
Pkg-Pin(mm) SOP-8-EP
Sink Source Source
Product Family 32 = Automotive Analog and Mixed Signal
Part Number 3125 = 3125
Product Type LT = Lighting LED Driver
Package option blank = Tray or Tube

IS32LT3125 Features

  • Single channel, sources up to 250mA
  • External resister sets source current
  • Programmable VCC undervoltage lockout to match the LED stack for High Side PWM operation
  • Shared fault flag for multiple devices operation
  • Fault protection with flag output:
  • - LED string open/short - OUT pin short to VCC/GND - ISET pin open/short - Thermal shutdown - ICC set to 30mA under fault condition (IS32LT3125 only)
  • External CSTOR capacitor keeps fault status during start/stop operation
  • SOP-8-EP package
  • AEC-Q100 qualification in progress
  • Operating temperature range from -40°C ~ +125°C

Overview

The IS32LT3125/3125A is a linear programmable current regulator consisting of a single output channel capable of 250mA. It features an EN pin to enable and disable the output channel’s current source. It supports PWM dimming via EN pin or power supply modulation (PSM). The UV pin can be used to set external VCC undervoltage lockout threshold via a resistor divider. An external resistor programs the current level for the channel current source. In addition, IS32LT3125/3125A integrates fault protection for LED open/short, ISET pin open/short and over temperature condition for robust operation. Detection of these failures is reported by the FAULTB pin. When a fault is detected the device will disable itself and output an open drain low signal. Multiple devices can have their FAULTB pins connected to create a “one-fail-all-fail” condition. Under a fault condition, the IS32LT3125 will sink 30mA ICC current, while the IS32LT3125A will sink a lower 2mA (Max.) ICC. The IS32LT3125/3125A is targeted at the automotive market with end applications to include interior and exterior lighting. For 12V automotive applications the low dropout driver can support one to several LEDs on the output channel. Both devices are offered in a small thermally enhanced SOP-8-EP package.

 

Related Part Number(s)

Description Stock Qty Available Qty Description Stock Qty Available Qty
IS32LT3125-GRLA3-TR IS32LT3125A-GRLA3-TR
IS32LT3125A IS32LT3125A-TR