Infineon Technologies BCR410WH6327XTSA1

Overview

BCR410WH6327XTSA1 from Infineon Technologies is a bias controller IC designed to supply stable, temperature-compensated collector current for NPN transistors and FETs. It operates from 1.8 V minimum supply, delivers up to 20 mA output, maintains ≤110 mV voltage drop at 10 mA, and features SOT343-4 package with 4-pin sense-controlled architecture for precision biasing in automotive lighting drivers.

For engineers reviewing the BCR410WH6327XTSA1 datasheet, BCR410WH6327XTSA1 pinout, BCR410WH6327XTSA1 application, or BCR410WH6327XTSA1 equivalent, key selection criteria include low-voltage operation (1.8 V min), current stability over temperature (±0.15 %/K), supply sensitivity (±2 %/V), RoHS-compliant SOT343 packaging, and AEC-Q101 qualification for automotive bias control circuits.

Technical Context

The BCR410WH6327XTSA1 implements a two-terminal current source topology with integrated sense feedback, enabling stable bias current independent of transistor h_FE variation. Its internal reference and amplifier maintain regulation across input voltages from 1.8 V to 18 V and temperatures from −65 °C to +150 °C junction.

It functions as a constant-current sink with external resistor programming (R_ext), where output current I_C = V_ref/R_ext, and V_ref is internally stabilized. The Sense pin enables Kelvin sensing to reject PCB trace resistance effects, critical for high-accuracy LED driver biasing.

Key Specifications

Pinout & Package

SOT343-4 (SC-82AB) surface-mount package: 1.3 mm × 1.3 mm × 0.95 mm body, lead pitch 0.65 mm, gull-wing leads, RoHS-compliant matte tin plating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bias controller applications.

Compared with NSI45020AZT1G and LM334Z/NOPB, the BCR410WH6327XTSA1 uniquely combines AEC-Q101 qualification, 4-pin sense architecture, and 1.8 V start-up in a miniature SOT343 package-enabling robust, programmable biasing where h_FE variation, thermal drift, and automotive compliance are critical.

Availability

BCR410WH6327XTSA1 is available at Aetrix Electronics and suitable for automotive lighting systems, engine control unit sensor interfaces, and industrial proximity sensor front-ends requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for BCR410WH6327XTSA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification to ISO/TS 16949.

The BCR410W series belongs to Infineon's automotive-qualified bias controller product line, engineered specifically to replace discrete resistor-based bias networks in safety-critical NPN/FET driver stages.

FAQ

What is the minimum supply voltage required for stable operation?

The BCR410WH6327XTSA1 guarantees stable current regulation down to 1.8 V at room temperature, with functional operation verified to 2.0 V across the full −40 °C to +125 °C automotive temperature range. Below 1.8 V, output current drops nonlinearly and is not specified.

How does the Sense pin improve bias accuracy?

The Sense pin connects to the load-side terminal of the external R_ext resistor, allowing the IC to measure voltage directly at the transistor base node. This compensates for voltage drop across PCB traces and solder joints, reducing current error from typical ±5 % to ±1.5 % in production layouts.

Is this device suitable for driving MOSFET gates directly?

No. The BCR410WH6327XTSA1 is a current sink, not a gate driver. It can bias the source or emitter of a FET but cannot source/sink the peak gate charge current required for fast switching. It is intended for DC biasing of FETs operating in linear or saturation regions-not for PWM gate control.

Does the device require an external capacitor for stability?

No external capacitor is required for basic operation. The IC is internally compensated for stability with standard PCB layout practices. However, a 100 nF ceramic bypass capacitor between Vs and GND, placed within 2 mm of the pins, is recommended to suppress high-frequency supply noise in automotive environments.