Analog Devices Inc. ADP8140CP-EVALZ

Overview

ADP8140CP-EVALZ from Analog Devices is an evaluation platform designed to demonstrate the ADP8140 4-channel, high-current LED driver IC in LFCSP package. It supports 3-LED (8–30 V) and 6-LED (15–30 V) configurations, delivers up to 350 mA per channel, and enables analog/PWM dimming, temperature-based current scaling via VT pin, and fault monitoring - used for automotive lighting, industrial signage, and high-brightness display prototyping.

For engineers reviewing the ADP8140CP-EVALZ datasheet, ADP8140CP-EVALZ pinout, ADP8140CP-EVALZ application, or ADP8140CP-EVALZ equivalent, this board provides hands-on validation of LED current sink control, feedback-driven external PMOS regulation, jumper-configurable DIM/VT/MODE logic, thermal derating using NTC, and fast-pulse response testing with sub-millisecond ISINK transitions.

Technical Context

The ADP8140CP-EVALZ integrates the ADP8140ACPZ-2-R7 IC with a discrete IRF9530N PMOS regulator stage and ADP8140 LED-EVALZ (24× XLamp neutral white LEDs, 6 per string). It implements closed-loop current regulation across four independent sinks, where each channel's output is scaled by ISET resistor, DIM voltage or PWM duty cycle, and VT input voltage or NTC-derived feedback.

Jumper-selectable modes define functional behavior at power-up: MODE sets DIM as analog (0–2 V) or PWM (140 Hz–40 kHz); MIN configures VT for linear scaling or pulse control; VT and DIM jumpers route signals to internal comparators or regulators, enabling simultaneous dimming and thermal protection without firmware.

Key Specifications

Availability

ADP8140CP-EVALZ is available at Aetrix Electronics and suitable for automotive headlight prototyping, industrial panel backlight validation, and high-reliability display system development requiring stable component supply and traceable evaluation hardware.

Supply support for ADP8140CP-EVALZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and communications systems.

The ADP8140 product line targets high-current, multi-string LED applications demanding tight current matching, robust thermal derating, and flexible dimming - optimized for automotive exterior lighting and architectural illumination where safety-critical current regulation is mandatory.

FAQ

What is the primary function of the ADP8140CP-EVALZ?

The ADP8140CP-EVALZ is an evaluation kit that demonstrates the ADP8140 4-channel LED driver IC. It allows engineers to validate current sink performance, dimming behavior (analog/PWM), thermal scaling via VT pin, and feedback-controlled external PMOS regulation. The ADP8140CP-EVALZ includes both the driver board (ADP8140EB-EVALZ) and LED load board (ADP8140 LED-EVALZ) for complete system-level testing.

How does the ADP8140CP-EVALZ support thermal derating of LED current?

The ADP8140CP-EVALZ uses an NTC thermistor (CP18WF104D03RB) on the ADP8140 LED-EVALZ board. When the VT jumper is configured for linear scaling (center pin to Pin 3), rising temperature lowers the NTC resistance, reducing the voltage divider output at the VT pin. This causes the ADP8140 to proportionally scale down all four channel currents - a hardware-based, firmware-free thermal protection mechanism implemented directly on the ADP8140CP-EVALZ platform.

Can the ADP8140CP-EVALZ drive both 3-LED and 6-LED strings, and what are the voltage requirements?

Yes, the ADP8140CP-EVALZ supports two configurations: 3-LED strings require 8 V to 30 V input, while 6-LED strings require 15 V to 30 V. This is enforced by the PMOS regulation stage and LED string topology on the ADP8140 LED-EVALZ board. The ADP8140CP-EVALZ user guide specifies these ranges based on forward voltage headroom needed for stable current regulation - confirmed in UG-1476 Table 1 and General Description section.

What are the key jumper functions on the ADP8140CP-EVALZ, and how do they affect operation?

The ADP8140CP-EVALZ features five configurable jumpers: MODE selects DIM as PWM or analog input; EN enables/disables the driver; MIN sets VT for pulsing or linear scaling; VT routes VT pin to VREG or NTC divider; DIM floats or connects DIM to potentiometer. Each jumper must be set before power-up, as configuration is latched during UVLO crossing - a hardware-defined behavior documented in UG-1476 Table 1 and Quick Start Procedures.

Does the ADP8140CP-EVALZ include the ADP8140 IC, and what is its package type?

Yes, the ADP8140CP-EVALZ includes the ADP8140ACPZ-2-R7 IC mounted on the ADP8140EB-EVALZ board. This variant uses a 20-lead LFCSP (Lead Frame Chip Scale Package), as explicitly stated in the UG-1476 General Description: "The ADP8140CP-EVALZ demonstrates the functionality of the ADP8140 lead frame chip scale package (LFCSP) current sink LED driver." No other package variants are present on this evaluation platform.