Infineon Technologies CHL8214-02CRT

Overview

CHL8214-02CRT from Infineon Technologies is a dual-output, 4+1-phase digital PWM buck controller for GPU voltage regulation, supporting independent loop switching frequencies up to 1.2 MHz, I²C-configurable VID selection (3-bit), and IR Adaptive Transient Algorithm (ATA) for bulk capacitor reduction. It integrates thermal protection (OTP), VRHOT# flag, and MTP memory for custom configuration.

For engineers reviewing the CHL8214-02CRT datasheet, CHL8214-02CRT pinout, CHL8214-02CRT application, or CHL8214-02CRT equivalent, key selection considerations include dual-loop phase control (4+1), I²C telemetry interface, programmable ICRITICAL signal, slow OCP for TDC compliance, and QFN-40 (6×6 mm) package compatibility with CHL8225 analog/power footprints.

Technical Context

The CHL8214 operates two independent synchronous buck control loops - primary loop supports up to 4 active phases plus 1 dedicated phase, secondary loop supports up to 1 phase - each configurable from 200 kHz to 1.2 MHz. Phase assignment and diode emulation are dynamically managed via IR Dynamic Phase Control (DPC).

It implements proprietary non-linear digital PWM algorithms enabling IR Adaptive Transient Algorithm (ATA), which reduces output voltage deviation during load transients and minimizes required bulk capacitance. Configuration and telemetry occur over a secure I²C bus with pin-programmable address and dedicated security enable pin.

Key Specifications

Pinout & Package

CHL8214-02CRT is housed in a 40-pin QFN package (6 mm × 6 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad. Pin functions are validated per Figure 1 (CHL8213/14 Package Top View) in the August 2013 datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output multi-phase buck controller applications.

Compared with ISL68127IRZ-T and MP2960GQ-Z, CHL8214-02CRT uniquely combines 4+1 phase scalability, hardware-enforced I²C security, VRHOT# signaling, and ATA-driven capacitor reduction - making it the only option qualified for flagship GPU reference designs requiring simultaneous core/memory rail coordination and thermal-aware power management.

Availability

CHL8214-02CRT is available at Aetrix Electronics and suitable for GPU voltage regulation, GDDR memory power delivery, and AI accelerator multi-rail designs requiring stable component supply, long-term lifecycle assurance, and design continuity across multiple generations.

Supply support for CHL8214-02CRT 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 leadership in digital power controllers and silicon carbide solutions.

The CHL82xx family was designed specifically for high-performance GPU and graphics memory voltage regulation, emphasizing digital adaptability, thermal intelligence, and layout simplicity in space-constrained PCB environments.

FAQ

What is the function of the ADDR/PROT/EN_L2 pin on CHL8214-02CRT?

This multifunction pin serves three roles: sets LSB of I²C address when pulled high/low, enables I²C security lock when held low during power-up, and acts as enable signal for the secondary (L2) control loop. Its state at POR determines whether the device boots into secure configuration mode or standard operation.

Does CHL8214-02CRT support automatic phase shedding below light load?

Yes - via IR Dynamic Phase Control (DPC), it automatically transitions from 4-phase to 1-phase operation and activates Active Diode Emulation when load drops below ~15% of full scale. This behavior is fully configurable via MTP registers and does not require host processor intervention.

Can CHL8214-02CRT be used without the I²C interface?

Yes - all critical functions operate using default MTP values and parallel VIDSEL lines. I²C is optional for advanced telemetry, dynamic reconfiguration, or security provisioning; basic voltage regulation remains fully functional with only VIDSEL0–2 and ENABLE asserted.

What thermal sensing method does CHL8214-02CRT use for VRHOT# generation?

It uses an external NTC thermistor connected to TSEN1/TSEN2 pins with internal biasing and ADC conversion. The measured temperature triggers VRHOT# assertion when exceeding user-defined thresholds stored in MTP, enabling direct coordination with GPU thermal management firmware without host CPU involvement.