Infineon Technologies CDM10V3XTSA1

Overview

CDM10V3XTSA1 from Infineon is a fully integrated 0–10 V dimming interface IC in SOT-23-6 package, converting analog voltage input (0–10 V) into a precise 1 kHz, 5 mA PWM current output for driving optocouplers in LED drivers. It features 200 µA dimmer bias current, 1% minimum duty cycle, ±3% dimming accuracy, and operates across 11–25 V_VCC. Used in commercial luminaires, troffers, and downlights requiring compact, low-variation dimming control.

For engineers reviewing the CDM10V3XTSA1 datasheet, CDM10V3XTSA1 pinout, CDM10V3XTSA1 application, or CDM10V3XTSA1 equivalent, this page delivers verified electrical specs, validated pin functions, real-world lighting use cases, and confirmed alternative parts with documented functional differences for reliable 0–10 V dimming system design.

Technical Context

The CDM10V3XTSA1 implements embedded digital signal processing to linearize the 0–10 V input into a proportional 1–100% PWM current output at fixed 1 kHz frequency. Its Rdim+ pin senses external dimmer voltage while sourcing 200 µA bias current, enabling direct connection to potentiometers or 0–10 V controllers without external biasing components.

It drives optocouplers via a regulated 5 mA I_OUT sink with <±3% dimming accuracy over temperature and unit-to-unit variation. The device includes internal protection against overvoltage on Rdim+ (max V_CC + 0.5 V), wake-up time of 40 µs, and supports ambient temperatures up to +105 °C.

Key Specifications

Pinout & Package

CDM10V3XTSA1 is housed in a thermally optimized SOT-23-6 package with exposed pad for enhanced thermal dissipation, suitable for high-density LED driver PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UCC27511DR and NCL30160DR2G, CDM10V3XTSA1 uniquely combines Rdim+ bias sourcing, 5 mA optocoupler drive, and digital dimming linearity in one SOT-23-6 chip-reducing component count by ≥7 parts where isolation and analog dimmer compatibility are mandatory.

Availability

CDM10V3XTSA1 is available at Aetrix Electronics and suitable for commercial troffers, office downlights, and undercabinet lighting requiring stable component supply, tight dimming accuracy, and compact PCB integration.

Supply support for CDM10V3XTSA1 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, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949 and IECQ QC 080000.

CDM10V3XTSA1 belongs to Infineon's Lighting Interface Solutions product line, engineered specifically to replace multi-component 0–10 V dimming circuits in space-constrained LED driver designs while maintaining ±3% accuracy and 1 kHz timing stability.

FAQ

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

The Rdim+ pin is rated for −0.5 V to V_CC + 0.5 V. Exceeding V_CC + 0.5 V risks permanent damage, even if V_CC is unpowered. A Schottky diode (e.g., MMSD301T1G) is recommended when active dimming sources may exceed this limit. This specification is defined in Table 3 of the official Infineon datasheet Rev. V1.0 (2017-07-04).

Can CDM10V3XTSA1 drive optocouplers directly without external components?

Yes - CDM10V3XTSA1 sources a regulated 5 mA PWM current from IOUT, sufficient to drive common PC817- or TLP18x-series optocouplers directly. No series resistor or current-setting components are required, provided the optocoupler forward voltage remains ≤3.63 V at 5 mA (per Absolute Maximum Ratings).

Does CDM10V3XTSA1 require an external capacitor on the Rdim+ pin?

A 2.2–10 nF capacitor (typically 4.7 nF) is recommended between Rdim+ and GND to suppress coupled noise. Smaller values preserve signal edge speed; larger values improve noise immunity. This is specified in Figure 2 and Section 3 of the datasheet, and omission may cause erratic dimming in EMI-prone environments.

What thermal considerations apply to CDM10V3XTSA1 in continuous 100% duty-cycle operation?

At 100% duty cycle and 25 V_VCC, power dissipation reaches 160 mW. Figure 3 in the datasheet mandates a minimum copper cooling area (e.g., ≥25 mm² on inner layer) to maintain junction temperature ≤135 °C at +105 °C ambient. Thermal vias to internal ground planes are strongly advised for sustained full-brightness operation.