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Microchip Technology EMC2112-BP-TR
- Part No.:
- EMC2112-BP-TR
- Manufacturer:
- Microchip Technology
- Category:
- Thermal Management
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
EMC2112-BP-TR.pdf
- Description:
- IC RPM FAN CTRLR 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,621
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Product details
Overview
EMC2112-BP-TR from SMSC is an SMBus/I²C-compatible, RPM-based linear fan controller with integrated high-side fan driver (600mA @ 5V), hardware thermal shutdown (1°C programmable trip point), and triple-zone remote temperature monitoring (±1°C accuracy, 0.125°C resolution) using Beta Compensation and Resistance Error Correction. It serves as a closed-loop thermal management IC in CPU cooling subsystems.
For engineers reviewing the EMC2112-BP-TR datasheet, EMC2112-BP-TR pinout, EMC2112-BP-TR application, or EMC2112-BP-TR equivalent, this page delivers verified specifications including RPM control accuracy (1% with external clock), thermal diode compatibility (45nm/65nm/90nm CPU substrates), SMBus 2.0 compliance, and QFN-20 package details - all critical for fan control firmware integration and PCB layout validation.
Technical Context
The EMC2112-BP-TR implements a closed-loop RPM feedback control algorithm with configurable spin-up routine, ramp rate control, and aging fan detection. Its tachometer input supports stall and invalid drive detection via programmable minimum edge count and valid TACH count thresholds.
Thermal monitoring uses dynamic and digital averaging, Beta Compensation (for BJT-model diodes), and Resistance Error Correction to eliminate PCB trace resistance offset. Hardware thermal shutdown is fully independent of software, triggered by analog comparator logic tied to TRIP_SET and SHDN_SEL pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0–3.6V core; 5V fan driver & reset generator - enables dual-rail operation without level shifters |
| Fan Drive Capability | 600mA high-side linear driver - sufficient for 12V/50mm axial fans at full speed with minimal thermal derating |
| RPM Control Accuracy | 1% with external clock; 3% with internal oscillator - determines closed-loop stability margin in noise-sensitive systems |
| Temperature Resolution | 0.125°C - supports fine-grained thermal throttling steps in CPU/GPU thermal management |
| Remote Diode Channels | 3 independent zones - allows simultaneous monitoring of CPU die, VRM, and chipset thermal diodes |
| SMBus/I²C Interface | SMBus 2.0 compliant with block read/write - ensures interoperability with standard system management controllers |
| Hardware Shutdown | 1°C incremental trip point (via TRIP_SET resistor); non-software-disableable - provides fail-safe thermal protection |
Pinout & Package
EMC2112-BP-TR is housed in a 20-pin, 4mm × 4mm lead-free RoHS-compliant QFN package with exposed thermal pad (EP). The package supports reflow soldering and provides low thermal resistance to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core supply input | 3.0–3.6V power for logic and ADC; decoupling required within 5mm |
| VDDFAN | Fan driver supply | 5V input for high-side driver; separate from VDD to isolate noise |
| GND | Ground reference | Common return for analog/digital circuits; connects to EP for thermal conduction |
| SCL | SMBus clock | Open-drain input compatible with 100kHz/400kHz I²C timing |
| SDA | SMBus data | Open-drain bidirectional line; requires pull-up to VDD |
| TACH | Fan tachometer input | Active-low pulse input; supports 2–8 pulses per revolution |
| TRIP_SET | Hardware shutdown threshold | Analog voltage input setting thermal trip point in 1°C increments via resistor divider |
| SHDN_SEL | Shutdown configuration strap | Logic-level input selecting one of three HW shutdown modes (Table 5.3) |
| RESET | 5V power-good output | Open-drain active-low signal asserting when VDDFAN < 4.5V |
| ADDR_SEL | I²C address select | Pull-up/pull-down sets SMBus address to 0x2E or 0x2F |
Key Features
| Feature | Design Value |
|---|---|
| Closed-loop RPM control | Enables precise fan speed regulation independent of voltage fluctuations or fan aging |
| Beta Compensation + REC | Corrects for ideality factor drift and PCB trace resistance, ensuring ±1°C accuracy across process nodes |
| Stall & aging fan detection | Reduces system failure risk by identifying degraded or seized fans before thermal runaway |
| Independent hardware shutdown | Guarantees thermal safety even during firmware hang or communication loss |
| 5V power-good reset | Provides reliable system initialization trigger when main 5V rail stabilizes |
Applications
| Notebook Computers | Desktop Computers |
|---|---|
Use Scenario: Thermal management of dual-core CPU and GPU in space-constrained clamshell chassis. IC Role / Device Role / Timing Role: Closed-loop RPM controller coordinating fan speed with CPU substrate diode readings and VRM temperature. Use Value: Maintains acoustic noise < 28 dBA while preventing thermal throttling during sustained multi-threaded workloads. | Use Scenario: Multi-zone cooling control for LGA1151 platform with discrete GPU and M.2 SSD heatsink. IC Role / Device Role / Timing Role: Simultaneous monitoring of CPU, chipset, and GPU thermal diodes with independent fan drive output. Use Value: Eliminates need for discrete thermal sensors and reduces BOM count by integrating trip logic and reset generation. |
| Embedded Industrial PCs | Server Blade Management |
Use Scenario: Fan control in fanless-to-fanned transition industrial HMIs operating at -40°C to +85°C ambient. IC Role / Device Role / Timing Role: Hardware thermal shutdown backup for main BMC; operates autonomously during boot or firmware update. Use Value: Ensures continuous thermal protection without BMC dependency - critical for unattended operation. | Use Scenario: Per-blade thermal supervision in 1U chassis with shared airflow and variable fan loading. IC Role / Device Role / Timing Role: RPM-based control with dynamic averaging to reject airflow turbulence noise in dense blade stacks. Use Value: Reduces false stall alarms by 92% compared to basic tachometer counting methods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RPM-based fan control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EMC2102-BP-TR | Single remote diode channel; no REC or Beta Compensation; 300mA fan drive | Limited to basic CPU-only thermal monitoring; unsuitable for multi-zone or precision AMD diode applications | Select when cost sensitivity outweighs multi-zone accuracy requirements |
| ADM1032ARMZ-REEL | No integrated fan driver; SMBus temp sensor only; ±2°C accuracy; no hardware shutdown | Requires external fan controller IC and discrete shutdown circuitry - increases layout complexity | Select when fan control is handled elsewhere and only precision local/remote sensing is needed |
Compared with EMC2102-BP-TR and ADM1032ARMZ-REEL, the EMC2112-BP-TR uniquely integrates hardware thermal shutdown, triple-diode monitoring with compensation, and 600mA drive - enabling single-chip thermal management where reliability, accuracy, and space constraints are critical.
Availability
EMC2112-BP-TR is available at Aetrix Electronics and suitable for notebook computers, desktop motherboards, and embedded industrial PCs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for EMC2112-BP-TR 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
SMSC (Standard Microsystems Corporation), now part of Microchip Technology, designs intelligent interface and system management ICs for PC, server, and embedded platforms.
The EMC2112-BP-TR belongs to SMSC's thermal management product line, engineered specifically for RPM-closed-loop fan control with hardware fail-safe shutdown in x86 computing and industrial embedded systems.
FAQ
What is the maximum fan current drive capability of the EMC2112-BP-TR?
The EMC2112-BP-TR provides a single high-side linear fan driver rated for up to 600mA from a 5V supply (VDDFAN). This supports common 12V DC brushless fans with typical startup currents under 500mA and steady-state loads up to 400mA, with thermal derating applied above 60°C ambient. The driver includes overcurrent limiting to protect against short-circuit faults.
Does the EMC2112-BP-TR support AMD thermal diodes?
Yes, the EMC2112-BP-TR supports AMD thermal diodes by allowing Beta Compensation and Resistance Error Correction (REC) to be disabled via configuration registers. This preserves measurement accuracy for AMD-specific diode characteristics, unlike Intel or generic BJT-model diodes where those features improve precision.
How is the hardware thermal shutdown trip point set on the EMC2112-BP-TR?
The hardware thermal shutdown trip point on the EMC2112-BP-TR is set by connecting a discrete resistor between the TRIP_SET pin and GND. The resistor value selects a trip temperature in 1°C increments from 60°C to 127°C (per Table 5.2). The SHDN_SEL pin configures the shutdown behavior mode (latch, pulse, or auto-restart), but does not affect the trip temperature itself.
Can the EMC2112-BP-TR operate without an external clock source?
Yes, the EMC2112-BP-TR includes an internal oscillator for RPM-based fan control, delivering 3% accuracy. An external clock (applied to CLKIN) improves RPM accuracy to ±1%, which is recommended for acoustic-sensitive or high-stability applications. The internal clock remains functional if CLKIN is left unconnected or grounded.
What is the function of the RESET pin on the EMC2112-BP-TR?
The RESET pin on the EMC2112-BP-TR is an open-drain output that asserts low when the 5V fan supply (VDDFAN) falls below 4.5V. It functions as a power-good indicator for system reset sequencing, providing a clean, glitch-free reset signal synchronized to the 5V rail stability - independent of the 3.3V core supply or SMBus communication status.
EMC2112-BP-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Fan Control, Temp Monitor
- Sensor Type:
- Internal and External
- Sensing Temperature:
- -
- Accuracy:
- ±2°C(Max)
- Topology:
- ADC (Sigma Delta), Comparator, Register Bank, Tach
- Output Type:
- 2-Wire SMBus
- Output Alarm:
- Yes
- Output Fan:
- Yes
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- 0°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x4)
EMC2112-BP-TR FAQ
1.How can I place an order for EMC2112-BP-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for EMC2112-BP-TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for EMC2112-BP-TR reliable?
The price and inventory of EMC2112-BP-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EMC2112-BP-TR is usually 5 days.
3.What payment methods are accepted for EMC2112-BP-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EMC2112-BP-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EMC2112-BP-TR?
EMC2112-BP-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EMC2112-BP-TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for EMC2112-BP-TR?
For technical support, including EMC2112-BP-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EMC2112-BP-TR requirements.
6.How does Aetrix verify that EMC2112-BP-TR is sourced from the original manufacturer or authorized distributors?
All EMC2112-BP-TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that EMC2112-BP-TR meets industry standards.
7.What is the process for return or replacement of EMC2112-BP-TR?
All EMC2112-BP-TR units undergo pre-shipment inspection (PSI). If there is an issue with EMC2112-BP-TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The EMC2112-BP-TR part is unused and in its original packaging.
Return procedure for EMC2112-BP-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
EMC2112-BP-TR Tags
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EMC2101-ACZL-TR
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MCP9844T-BE/MNY
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EMC2101-R-ACZL-TR
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MCP98244T-BE/MNY
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TC670ECHTR
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SE98ATP,547
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AMC6821SDBQR
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MAX6604AATA+T
Analog Devices Inc./Maxim Integrated
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onsemi
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MAX6643LBBAEE+
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MAX6684ESA+T
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MAX6639AEE+
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