Infineon Technologies CHL8214-05CRT

Overview

CHL8214-05CRT from Infineon Technologies is a dual-output digital multi-phase buck controller supporting 4+1-phase configuration per loop, featuring I²C programmability, IR Adaptive Transient Algorithm (ATA), Dynamic Phase Control (DPC), and thermal protection with VRHOT# flag. It operates from 3.3V ±10%/−15%, supports 200kHz–1.2MHz per-phase switching, and targets GPU voltage regulation in high-performance graphics systems.

For engineers reviewing the CHL8214-05CRT datasheet, CHL8214-05CRT pinout, CHL8214-05CRT application, or CHL8214-05CRT equivalent, key selection criteria include dual-loop independent frequency control, I²C address programmability, VID-select line count, IR Efficiency Shaping implementation, and MTP-based configuration storage for VRD compliance and overclocking support.

Technical Context

The CHL8214-05CRT implements two independent digital PWM control loops-Loop 1 (4-phase) and Loop 2 (1-phase)-each with configurable switching frequency (200kHz–1.2MHz), per-loop OVP/UVP/OCP, and dedicated thermal sensing via TSEN1/TSEN2 inputs. It uses proprietary non-linear digital PWM algorithms to execute IR's Adaptive Transient Algorithm (ATA), reducing bulk capacitor requirements.

Configuration is stored in on-chip multiple-time programmable (MTP) memory and accessed via I²C interface with pin-programmable address (ADDR/PROT/EN_L2), SMB_DAT/SMB_CLK pins, and security enable functionality. The device supports slow OCP for Thermal Design Current (TDC) protection and ICRITICAL signal programming for precise current threshold setting.

Key Specifications

Pinout & Package

CHL8214-05CRT is housed in a 40-pin 6×6 mm QFN package 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-loop multi-phase buck controller applications.

Compared with CHL8213-00CRT, CHL8214-05CRT adds VRHOT# and TSEN2 for enhanced thermal safety in overclocked GPUs; versus ISL6377IRZ, it delivers superior transient response via ATA and eliminates external configuration components through integrated MTP.

Availability

CHL8214-05CRT is available at Aetrix Electronics and suitable for GPU core regulation, GDDR memory power delivery, and VRD13.0-compliant graphics reference designs requiring stable component supply, long-term lifecycle support, and verified thermal performance.

Supply support for CHL8214-05CRT 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 controller innovation since 2005.

The CHL82xx family was designed specifically for GPU voltage regulation under VRD13.0 and later specifications, emphasizing digital adaptability, thermal safety, and minimal external component count in space-constrained graphics PCBs.

FAQ

What is the function of the ICRITICAL signal on CHL8214-05CRT?

The ICRITICAL signal is a programmable current threshold output that asserts when sensed phase current exceeds a user-defined limit stored in MTP memory. It serves as a hardware-fast interrupt for external PMICs or FPGA-based system monitors to initiate immediate phase shedding or throttling - critical for preventing thermal runaway during GPU boost states.

Does CHL8214-05CRT support both synchronous and asynchronous rectification modes?

No. CHL8214-05CRT exclusively supports synchronous rectification using external high-side and low-side MOSFETs driven by its PWM outputs. It does not implement diode emulation in the traditional sense but uses Active Diode Emulation mode - a digitally controlled low-side FET gate timing technique that mimics diode conduction during light-load discontinuous conduction mode.

Can CHL8214-05CRT be configured without the IR Digital Power Design Center (DPDC) GUI?

Yes - all registers are accessible via standard I²C commands using any compatible master (e.g., microcontroller, FPGA, or host CPU). While DPDC simplifies initial setup and validation, raw register maps and bit definitions are published in the datasheet, enabling full custom firmware integration without dependency on Infineon tools.

How does the VRHOT# flag interact with the TSEN inputs?

VRHOT# is an open-drain output asserted when die temperature exceeds the threshold defined in MTP memory. It is derived solely from internal die sensing and is independent of TSEN1/TSEN2, which monitor external board-level temperatures. Both signals can trigger system-level thermal shutdown, but VRHOT# provides faster reaction to junction overheating during transient overload conditions.