Linear LED driver — four 500 mA channels with analog and PWM dimming
The Analog Devices ADP8140ACPZ-2-R7 is a linear LED driver built for backlight and general-lighting applications that need four independently controlled channels, each rated for 500 mA. It integrates the current-setting switches on-chip, so no external MOSFETs are needed per channel — just the LED strings and a current-set resistor. The driver accepts a wide input supply from 3 V up to 30 V, which covers automotive battery rails, industrial 24 V buses, and standard 5 V or 12 V logic supplies. Dimming is handled either by an analog control voltage or by a PWM signal, giving the firmware engineer flexibility to trade off color temperature against brightness linearity.
500 mA per channel — thermal and current-matching budget
Each of the four outputs is rated for 500 mA continuous. The linear topology dissipates heat as the voltage drop across the pass element.
Pin-compatible sibling — ADP8140ACPZ-1-R7
The closest functional second-source is the ADP8140ACPZ-1-R7. Both are linear LED drivers in the same 16-LFCSP package with the same 4-output, 500 mA per-channel architecture, the same 3 V to 30 V supply range, and the same analog-plus-PWM dimming capability. The -1 and -2 suffix likely denotes a factory-programmed current-set or a minor trim variant — the datasheet should confirm whether the external resistor value differs. For dual-sourcing or a drop-in alternate during allocation, the -1 variant is the first candidate to qualify.