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Microchip Technology EMC2103-1-KP-TR
- Part No.:
- EMC2103-1-KP-TR
- Manufacturer:
- Microchip Technology
- Category:
- Thermal Management
- Package:
- 12-VQFN Exposed Pad
- Datasheet:
-
EMC2103-1-KP-TR.pdf
- Description:
- IC RPM FAN CTRLR 12QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,931
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Product details
Overview
EMC2103-1-KP-TR from SMSC is a 12-pin QFN SMBus-compliant RPM-based fan controller with hardware thermal shutdown, internal temperature monitoring (±2°C accuracy), one external diode channel (±1°C accuracy), and high-frequency PWM fan drive. It delivers 2.5% RPM control accuracy from 500 to 16,000 RPM and supports thermal protection in notebook computers and graphics cards.
For engineers reviewing the EMC2103-1-KP-TR datasheet, EMC2103-1-KP-TR pinout, EMC2103-1-KP-TR application, or EMC2103-1-KP-TR equivalent, key selection criteria include hardware-programmable shutdown trip point (65–127°C), SMBus Alert compatibility, 3.3V operation, RPM-based closed-loop control, and support for 4-wire fans with tach feedback.
Technical Context
The EMC2103-1-KP-TR implements an analog multiplexer feeding an 11-bit ΣΔ ADC for temperature measurement, paired with dedicated tachometer input logic and a PWM driver stage. Its RPM-based control algorithm continuously compares measured fan speed against target RPM derived from either manual register settings or a programmable temperature lookup table.
Hardware thermal shutdown is implemented via a non-volatile TRIP_SET register that directly drives SYS_SHDN output-bypassing SMBus interface and firmware. The device operates exclusively from a 3.3V supply and uses SMBus 2.0 protocol with Alert response address support for system-level thermal event handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3V only; no internal regulator-requires clean, stable 3.3V rail with bypass capacitor. |
| RPM Accuracy | ±2.5% from 500 to 16,000 RPM; enables precise closed-loop fan speed regulation without external tach conditioning. |
| Temp Accuracy (Ext) | ±1°C over 60–125°C for external diode; includes series resistance and beta compensation for CPU thermal diodes. |
| Temp Accuracy (Int) | ±2°C internal sensor; monitors die temperature for self-protection and ambient reference. |
| Shutdown Range | 65–127°C hardware-trip range; set once via TRIP_SET register and immune to software corruption. |
| SMBus Compliance | SMBus 2.0 + Alert response; allows integration into host BMC or EC without custom interrupt handling. |
| PWM Frequency | High-frequency mode only (no low-frequency option); avoids audible noise in compact enclosures. |
Pinout & Package
EMC2103-1-KP-TR is housed in a 4mm × 4mm, 12-pin lead-free RoHS-compliant QFN package with exposed thermal pad. Pin 1 marked by dot; recommended PCB footprint matches Figure 4 in SMSC revision 0.93.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | 3.3V main supply; requires local 0.1µF ceramic bypass to GND. |
| GND | Ground reference | Analog/digital common return; connects to thermal pad for heat dissipation. |
| SMDATA | SMBus data line | Open-drain bidirectional bus line; pulled up externally to 3.3V. |
| SMCLK | SMBus clock line | Input-only clock; driven by host controller at ≤100 kHz. |
| TACH | Fan tachometer input | Edge-sensitive input for 2-pulse-per-revolution fan feedback. |
| PWM | Fan speed control output | High-frequency PWM signal (typ. 25 kHz); drives external MOSFET gate or fan PWM input. |
| DP1/DN1 | External diode sense pair | Differential input for single external thermal diode (e.g., CPU DTS). |
| ALERT | SMBus Alert output | Open-drain interrupt signal asserted on temp limit or fault condition. |
| SYS_SHDN | Hardware thermal shutdown | Active-low output directly tied to system power sequencer or reset controller. |
| SHDN_SEL | Shutdown enable select | Logic-high enables SYS_SHDN assertion; tied high internally if unused. |
| TRIP_SET | Hardware trip point config | 3-bit input setting shutdown threshold (65°C to 127°C in 8°C steps). |
Key Features
| Feature | Design Value |
|---|---|
| RPM-based closed-loop control | Maintains exact fan speed under varying load/aging without manual recalibration or PID tuning. |
| Hardware thermal shutdown | Guarantees fail-safe system halt at critical temperature-even during firmware crash or SMBus lockup. |
| Single external diode support | Optimized for CPU thermal monitoring using standard substrate diode; eliminates need for multi-channel sensing. |
| High-frequency PWM drive | Enables silent fan operation in space-constrained devices like ultrabooks and embedded GPUs. |
| SMBus Alert compatibility | Reduces host polling overhead and enables real-time thermal event notification in managed systems. |
Applications
| Notebook Thermal Management | Graphics Card Cooling |
|---|---|
Use Scenario: Real-time CPU and GPU temperature tracking with adaptive fan speed in thin-and-light notebooks. IC Role / Device Role / Timing Role: Primary fan controller interfacing with CPU thermal diode and 4-wire cooling fan via TACH and PWM. Use Value: Maintains acoustic comfort and thermal safety using hardware-enforced shutdown and ±1°C external sensing. | Use Scenario: Compact dual-fan cooling solution on discrete GPU PCBs with limited routing area. IC Role / Device Role / Timing Role: Dedicated fan speed manager for VRM and GPU die cooling, using internal sensor for board ambient reference. Use Value: Eliminates need for external tach conditioners and provides deterministic shutdown at 105°C without host intervention. |
| Industrial Embedded Controller | Network Switch Fan Control |
Use Scenario: Fan regulation in fan-cooled industrial PLCs operating across -20°C to 70°C ambient. IC Role / Device Role / Timing Role: Standalone thermal supervisor with SMBus Alert for remote monitoring and hardware-initiated shutdown. Use Value: Ensures long-term reliability via resistance error correction and 0.125°C resolution for gradual thermal drift detection. | Use Scenario: Multi-fan airflow management in 1U network switches with dense port layout. IC Role / Device Role / Timing Role: Centralized fan controller receiving DTS data from switch ASIC and driving multiple PWM fans. Use Value: Achieves 2.5% RPM accuracy across 500–16k RPM range, enabling precise airflow matching to ASIC thermal load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fan control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EMC2103-2-AP-TR | 16-pin QFN; supports up to three external diodes and two GPIOs; includes EEPROM load disable. | Required when monitoring GPU + CPU + chipset temperatures simultaneously. | Select EMC2103-2-AP-TR only if multi-diode sensing or GPIO expansion is needed-EMC2103-1-KP-TR suffices for single-CPU use cases. |
| ADM1032ARQZ-REEL | Analog Devices part; dual-channel temp monitor + fan control; no hardware shutdown output; SMBus 1.1 only. | Lacks dedicated SYS_SHDN pin and TRIP_SET hardware programming-relies on software polling and alert interrupts. | Choose ADM1032ARQZ-REEL only if legacy SMBus 1.1 compatibility is required and hardware shutdown is not mandatory. |
Compared with EMC2103-2-AP-TR and ADM1032ARQZ-REEL, the EMC2103-1-KP-TR uniquely combines single-diode optimization, hardware-enforced thermal shutdown, and high-frequency PWM in a minimal 12-pin footprint-making it ideal for cost- and space-constrained CPU-only thermal designs.
Availability
EMC2103-1-KP-TR is available at Aetrix Electronics and suitable for notebook computers, graphics cards, and industrial embedded controllers requiring stable component supply, RoHS compliance, and long-lifecycle availability.
Supply support for EMC2103-1-KP-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) was a fabless semiconductor company specializing in connectivity, timing, and thermal management ICs before its acquisition by Microchip Technology in 2012.
The EMC2103 product line was designed specifically for intelligent, SMBus-based fan control in space-constrained computing platforms where hardware-level thermal safety and RPM accuracy are critical.
FAQ
What is the function of the TRIP_SET pins on the EMC2103-1-KP-TR?
The TRIP_SET pins (3-bit input) configure the hardware thermal shutdown threshold between 65°C and 127°C in 8°C increments. This setting is latched at power-up and cannot be altered via SMBus-ensuring fail-safe behavior even during firmware failure. The EMC2103-1-KP-TR asserts SYS_SHDN low when internal or external temperature exceeds this hard-coded limit.
Does the EMC2103-1-KP-TR support low-frequency PWM fan drive?
No. The EMC2103-1-KP-TR supports high-frequency PWM only-optimized to eliminate audible noise in consumer electronics. Unlike the EMC2103-2 variant, it does not include low-frequency PWM mode. The EMC2103-1-KP-TR's PWM output operates at a fixed high frequency suitable for direct fan input or external gate driver stages.
Can the EMC2103-1-KP-TR monitor more than one external temperature source?
No. The EMC2103-1-KP-TR supports exactly one external diode channel (DP1/DN1). Multi-diode capability (up to three channels) is exclusive to the EMC2103-2 and EMC2103-4 variants. The EMC2103-1-KP-TR is optimized for CPU-only thermal monitoring in cost-sensitive, single-sensor applications.
Is the internal temperature sensor in the EMC2103-1-KP-TR calibrated at production?
Yes. The internal temperature sensor is factory-calibrated to ±2°C accuracy across the operating range and provides 0.125°C resolution via the 11-bit ΣΔ ADC. This calibration is retained across power cycles and does not require host software initialization-the EMC2103-1-KP-TR reports valid internal temperature immediately after SMBus reset.
How does the EMC2103-1-KP-TR handle series resistance errors in external diode measurements?
The EMC2103-1-KP-TR applies automatic series resistance compensation using dual-current-source measurement on DP1/DN1. It calculates and subtracts offset caused by PCB trace resistance-critical for accurate CPU diode readings. This correction is enabled by default and requires no configuration; it is a core feature distinguishing the EMC2103-1-KP-TR from basic thermal monitors.
EMC2103-1-KP-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 12-VQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Fan Control, Temp Monitor
- Sensor Type:
- Internal and External
- Sensing Temperature:
- -
- Accuracy:
- ±2°C
- Topology:
- ADC (Sigma Delta), Multiplexer, Register Bank
- Output Type:
- SMBus
- Output Alarm:
- Yes
- Output Fan:
- Yes
- Voltage - Supply:
- 3.3V
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-QFN (4x4)
EMC2103-1-KP-TR FAQ
1.How can I place an order for EMC2103-1-KP-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for EMC2103-1-KP-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 EMC2103-1-KP-TR reliable?
The price and inventory of EMC2103-1-KP-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EMC2103-1-KP-TR is usually 5 days.
3.What payment methods are accepted for EMC2103-1-KP-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EMC2103-1-KP-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EMC2103-1-KP-TR?
EMC2103-1-KP-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EMC2103-1-KP-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 EMC2103-1-KP-TR?
For technical support, including EMC2103-1-KP-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EMC2103-1-KP-TR requirements.
6.How does Aetrix verify that EMC2103-1-KP-TR is sourced from the original manufacturer or authorized distributors?
All EMC2103-1-KP-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 EMC2103-1-KP-TR meets industry standards.
7.What is the process for return or replacement of EMC2103-1-KP-TR?
All EMC2103-1-KP-TR units undergo pre-shipment inspection (PSI). If there is an issue with EMC2103-1-KP-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 EMC2103-1-KP-TR part is unused and in its original packaging.
Return procedure for EMC2103-1-KP-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
EMC2103-1-KP-TR Tags
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EMC2101-ACZL-TR
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EMC2101-R-ACZL-TR
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