Infineon Technologies CDM10VXTSA1

Overview

CDM10VXTSA1 from Infineon is a fully integrated 0–10 V dimming interface IC in SOT-23-6 package, converting analog dimmer voltage (0–10 V) into a 5 mA PWM current signal for optocoupler-driven LED controllers. It supports programmable minimum duty cycle (1–10%), PWM frequency (200 Hz–2 kHz), bias current (50–500 µA), and Dim-to-Off enable/disable. Used in troffer and downlight drivers requiring precise, low-variation dimming control.

For engineers reviewing the CDM10VXTSA1 datasheet, CDM10VXTSA1 pinout, CDM10VXTSA1 application, or CDM10VXTSA1 equivalent, this page delivers verified electrical parameters, functional configuration options, transparent PWM mode behavior, thermal cooling guidance, and real-world dimming characteristic curves - all critical for lighting BOM optimization and analog-to-PWM interface validation.

Technical Context

The CDM10VXTSA1 implements embedded digital signal processing to minimize unit-to-unit variation in PWM output timing and amplitude. Its internal architecture includes a voltage-sensing front-end on Rdim+, a programmable PWM generator with configurable frequency and min-duty logic, and a 5 mA constant-current sink driver on Iout.

It operates across 11–25 V VCC, supports both standard dimming (1–9 V input → 0–100% PWM) and transparent mode (Rdim+ PWM passed directly to Iout when DIM2OFF fused and f_PWM = 2 kHz), with propagation delay ≤8.8 µs and edge times ≤1.8 µs - enabling high-fidelity signal replication in noise-sensitive lighting systems.

Key Specifications

Pinout & Package

SOT-23-6 package: 2.9 mm × 1.6 mm footprint, 1.1 mm height, thermally enhanced pad (exposed drain), suitable for compact LED driver PCBs with minimal layout area.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 0–10 V to PWM dimming interface applications.

Compared with UCC27531DR and NCP7804, CDM10VXTSA1 uniquely integrates voltage sensing, digital PWM generation, programmable timing, and Dim-to-Off in a single SOT-23-6 chip - reducing BOM count by ≥7 components and eliminating firmware development for standard 0–10 V dimming.

Availability

CDM10VXTSA1 is available at Aetrix Electronics and suitable for commercial troffers, office downlights, and architectural signage requiring stable component supply, long-lifecycle availability, and consistent dimming performance across production batches.

Supply support for CDM10VXTSA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and industrial control solutions, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

CDM10VXTSA1 belongs to Infineon's Lighting Interface product line, designed specifically to replace discrete 0–10 V dimming circuits with integrated, programmable, and thermally optimized ICs for LED driver manufacturers.

FAQ

What is the maximum allowable voltage on the Rdim+ pin?

The Rdim+ pin is clamped to VCC + 0.5 V internally. Exceeding this voltage risks damage or latch-up. In typical operation, Rdim+ accepts 0–9 V for linear dimming; above 9 V, the output remains fully on. A Schottky diode (e.g., MMSD301T1G) is recommended for overvoltage protection when active dimming sources are used.

How is the CDM10VXTSA1 programmed, and can it be reprogrammed in-circuit?

Programming is performed once at factory using eFuse technology via RxD and VFSS pins with 4.1 V programming voltage. After fusing, configuration is permanent and irreversible. RxD and VFSS must be tied to GND during normal operation - no in-circuit reprogramming capability exists.

Does the CDM10VXTSA1 require an external capacitor on Rdim+, and what value is recommended?

Yes - a capacitor (2.2–10 nF, typically 4.7 nF) is required between Rdim+ and GND to filter coupled noise. Smaller values preserve fast dimming response edges; larger values improve noise immunity. This capacitor is mandatory per Infineon's application guidance to ensure stable dimming across EMI-prone environments like commercial buildings.

Can the CDM10VXTSA1 drive an optocoupler directly without additional components?

Yes - the 5 mA constant-current Iout pin drives standard optocoupler LEDs (e.g., PC817, TLP185) directly. No external current-limiting resistor or transistor is needed. The internal current sink ensures accurate PWM amplitude across temperature and supply variations, simplifying interface design and improving reliability.