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Microchip Technology MIC2871YMK-T5
- Part No.:
- MIC2871YMK-T5
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
MIC2871YMK-T5.pdf
- Description:
- IC LED DRVR RGLTR SGL WR 14LDFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC2871YMK-T5 from Microchip Technology is a 1.2A synchronous boost flash LED driver IC with single-wire serial interface and dual hardware enable pins (FEN1/FEN2), operating from 2.7V to 5.5V input, delivering ±5% LED current accuracy and true load disconnect for smartphone camera flashlight applications.
For engineers reviewing the MIC2871YMK-T5 datasheet, MIC2871YMK-T5 pinout, MIC2871YMK-T5 application, or MIC2871YMK-T5 equivalent, key selection criteria include flash/torch mode programmability, 2 MHz switching frequency enabling compact 1 µH inductor use, configurable safety timer, OVP/short-circuit protection, and 14-pin 3 mm × 2 mm LDFN thermal performance.
Technical Context
The MIC2871YMK-T5 integrates a current-mode PWM boost converter running at 2 MHz with internal synchronous MOSFETs and a precision LED current sink. It supports two independent control paths: hardware-triggered Flash mode via FEN1/FEN2 logic-OR inputs and register-based Flash/Torch control via its robust single-wire serial interface (DC pin).
Its functional architecture includes dedicated safety circuitry - configurable safety timer (1.25 µs default duration), overvoltage protection (5.37 V typical threshold), LED short detection (1.7 V VOUT–VLED threshold), and thermal shutdown (155°C trip). The FRSET pin sets maximum Flash current (up to 1.2 A) with 17 kΩ–60 kΩ resistor range, while Torch current defaults to 25% of Flash current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max LED Current | 1.2 A Flash mode - enables high-brightness image capture in low-light mobile cameras. |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion/Li-poly battery systems across smartphones and portable devices. |
| Switching Frequency | 2 MHz - allows use of ultra-small 1 µH inductors and reduces EMI footprint in space-constrained PCB layouts. |
| LED Current Accuracy | ±5% - ensures consistent flash brightness and color rendering across temperature and supply variations. |
| Shutdown Current | 1 µA - minimizes battery drain during standby in always-on camera subsystems. |
| OVP Threshold | 5.37 V typical - protects internal circuitry and external LEDs from overvoltage stress during boost regulation. |
| Safety Timer Duration | Configurable default 1.25 µs - prevents thermal damage by limiting flash duration when current exceeds threshold. |
| Junction Temp Range | –40°C to +125°C - supports reliable operation in automotive-grade and industrial handheld environments. |
Pinout & Package
Package: 14-pin 3 mm × 2 mm LDFN (MK suffix), ePAD exposed thermal pad requiring PCB ground connection for optimal thermal dissipation (θJA = 65.83°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, AGND1 | Analog Ground (LED return) | Provides dedicated low-noise return path for LED current sink; must be separated from power ground loops. |
| 2, DC | Single-wire serial I/O / Enable | Multi-function pin: hardware enable (logic-high) or serial command interface (pulse-edge encoded data). |
| 3, LED | LED Cathode Sink | Current sink node for white LED cathode; connects to LED anode via OUT pin for boost-driven current path. |
| 4, FEN1 | Flash Enable #1 | Hardware trigger for Flash mode; logic-OR with FEN2; internally pulled down (1 µA) if floating. |
| 5, AGND2 | Analog Reference Ground | Reference for FRSET bias and internal control circuitry; connects directly to ePAD and AGND1 at single point. |
| 6, VIN | Main Power Input | 2.7–5.5 V supply input; requires ≥2.2 µF ceramic capacitor to AGND2 for stable gate drive and regulation. |
| 7, PGND1 | Power Ground (inductor return) | High-current return for boost inductor; must be routed with minimal loop area to reduce EMI. |
| 8, OUT | Boost Output / LED Anode | Regulated high-side output driving LED anode; requires ≥4.7 µF ceramic capacitor to PGND1. |
| 10, SW | Switch Node | Internal MOSFET connection point; carries high di/dt switching current; requires tight layout away from sensitive analog traces. |
| 11, FEN2 | Flash Enable #2 | Redundant hardware Flash trigger; identical function and pull-down behavior as FEN1. |
| 13, PGND2 | Secondary Power Ground | Internally connected to PGND1; provides additional low-impedance path for high-frequency return currents. |
| 14, FRSET | Flash Current Programming | Resistor-to-AGND2 sets max Flash current (1.2 A @ 17 kΩ); grounded for 1 A default; no float allowed. |
| ePAD | Exposed Thermal Pad | Must be soldered to solid PCB ground plane for thermal management and electrical reference integrity. |
Key Features
| Feature | Design Value |
|---|---|
| True Load Disconnect | Completely isolates LED from boost output during shutdown - eliminates leakage-induced dim glow and preserves battery life. |
| Configurable Safety Timer | Programmable duration and current threshold (via registers Addr 3 & 5) - enables precise thermal management for varying LED thermal mass and ambient conditions. |
| LED Short Detection | Active pre-flash test (2 mA, 200 µs) measuring VOUT–VLED; aborts Flash/Torch if <1.7 V - prevents damage from shorted LED strings or PCB faults. |
| Low-Battery Voltage Detection | Adjustable LBVD threshold (default 3.6 V, ±50 mV accuracy) - disables LED driver before battery sag compromises system stability or image quality. |
| Single-Wire Serial Interface | Robust address/data framing with latch timeout (TLAT) and end timeout (TEND) - tolerates low-cost MCU oscillators and rejects noise-induced spurious writes. |
| Overvoltage Protection | 5.37 V typical OVP with 60 mV hysteresis - latches off on overvoltage event; cleared only by power cycle or DC pin assertion - prevents catastrophic failure under fault conditions. |
Applications
| Smartphone Camera Flash | Auto-Focus Assist Light |
|---|---|
Use Scenario: High-intensity burst illumination during still image capture in low-light conditions on modern smartphones. IC Role / Device Role / Timing Role: Flash LED driver providing precisely timed 1.2 A current pulses with <1.25 µs safety-limited duration and ±5% accuracy. Use Value: Enables consistent exposure and white balance across varying battery voltage and temperature without manual calibration. | Use Scenario: Low-power continuous illumination during phase-detection auto-focus sequence prior to image capture. IC Role / Device Role / Timing Role: Torch mode LED driver delivering adjustable current up to 300 mA (25% of Flash max) with register-controlled duration. Use Value: Provides sufficient visible light for focus sensors while minimizing power draw and thermal buildup during multi-frame AF routines. |
| White Balance Calibration | Video Torch Lighting |
Use Scenario: Controlled spectral illumination during real-time white balance calculation in video recording mode. IC Role / Device Role / Timing Role: Precision current source maintaining stable LED flux across input voltage variation using FRSET-programmed accuracy. Use Value: Delivers repeatable chromaticity for accurate RGB sensor response mapping, critical for professional-grade color fidelity. | Use Scenario: Steady, flicker-free illumination during HD/4K video capture on handheld devices. IC Role / Device Role / Timing Role: Constant-current LED driver operating in Torch mode with programmable brightness via single-wire interface. Use Value: Eliminates visible PWM artifacts in recorded video while supporting dynamic brightness adjustment synchronized with scene lighting changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61310DSQR | 1.5 A max flash current; 3.5 MHz switching; no integrated safety timer or LED short detection. | Lacks configurable safety timer and short-circuit test - requires external monitoring for thermal/short protection. | Choose when higher peak current and faster switching are prioritized over integrated protection features. |
| RT9397BZSP | 1.0 A max flash current; 1.5 MHz switching; single-wire interface; no FRSET programming or LBVD. | Fixed current levels only; no low-battery detection - less suitable for battery-voltage-sensitive mobile designs. | Choose for cost-sensitive applications where fixed 1 A flash and basic single-wire control suffice. |
Compared with TPS61310DSQR and RT9397BZSP, the MIC2871YMK-T5 uniquely combines 1.2 A programmable flash current, integrated safety timer with current threshold setting, LED short detection, and adjustable LBVD - making it optimal for robust, thermally managed smartphone camera subsystems requiring minimal external components.
Availability
MIC2871YMK-T5 is available at Aetrix Electronics and suitable for smartphone camera modules, portable medical imaging devices, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability.
Supply support for MIC2871YMK-T5 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
Microchip Technology is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs for embedded, automotive, and industrial markets.
The MIC2871YMK-T5 belongs to Microchip's high-efficiency LED driver product line, designed specifically for space-constrained, battery-powered mobile imaging systems requiring precision flash/torch control and comprehensive fault protection.
FAQ
What is the maximum LED current supported by the MIC2871YMK-T5?
The MIC2871YMK-T5 supports up to 1.2 A of LED current in Flash mode, programmable via the FRSET pin using a resistor between 17 kΩ and 60 kΩ. At 17 kΩ, the device delivers its full 1.2 A rating; grounding FRSET yields a default 1.0 A. Torch mode current is fixed at 25% of the configured Flash current, ensuring predictable scaling between illumination modes in the MIC2871YMK-T5.
How does the single-wire serial interface on the MIC2871YMK-T5 work?
The MIC2871YMK-T5 uses its DC pin for both hardware enable and serial communication via pulse-edge encoding: rising edges increment an internal counter, and inactivity > TLAT (97–324 µs) latches data. Address/data frames require strict timing (TON/TOFF < TLAT, >TEND for stop) to prevent erroneous writes. This design enables robust control with minimal GPIO usage while maintaining register persistence in Idle mode - a core capability of the MIC2871YMK-T5.
Does the MIC2871YMK-T5 provide protection against LED short circuits?
Yes, the MIC2871YMK-T5 performs an automatic LED short-circuit test before each Flash or Torch activation: it sources 2 mA for 200 µs and measures VOUT–VLED; if <1.7 V, the LED is flagged as shorted and the mode is disabled. This test runs independently per activation and is not latched - ensuring continuous fault awareness without false lockouts. This behavior is intrinsic to the MIC2871YMK-T5's safety architecture.
What is the purpose of the FRSET pin on the MIC2871YMK-T5?
The FRSET pin on the MIC2871YMK-T5 sets the maximum Flash mode LED current via an external resistor to AGND2, using the formula IFLASH(MAX) = 20500 / RFRSET (kΩ). It accepts 17–60 kΩ for 1.2–0.34 A range; grounding selects 1.0 A default. The pin must never float and benefits from ≤0.1% resistor tolerance for best accuracy - a defining configuration element of the MIC2871YMK-T5's precision flash control.
Can the MIC2871YMK-T5 operate without the single-wire interface?
Yes, the MIC2871YMK-T5 fully supports standalone hardware operation using FEN1 and FEN2 pins for Flash mode triggering and DC pin as simple enable/disable - no serial interface required. Torch mode can also be activated via FEN1/FEN2 with register defaults. All protection features (OVP, short detect, thermal shutdown, safety timer) remain active regardless of interface usage, preserving system safety in the MIC2871YMK-T5's hardware-first design.
MIC2871YMK-T5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 1.2A (Flash)
- Frequency:
- 2MHz
- Dimming:
- Single-Wire
- Applications:
- Camera Flash
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-LDFN (3x2)
MIC2871YMK-T5 FAQ
1.How can I place an order for MIC2871YMK-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2871YMK-T5 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 MIC2871YMK-T5 reliable?
The price and inventory of MIC2871YMK-T5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2871YMK-T5 is usually 5 days.
3.What payment methods are accepted for MIC2871YMK-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2871YMK-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2871YMK-T5?
MIC2871YMK-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2871YMK-T5 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 MIC2871YMK-T5?
For technical support, including MIC2871YMK-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2871YMK-T5 requirements.
6.How does Aetrix verify that MIC2871YMK-T5 is sourced from the original manufacturer or authorized distributors?
All MIC2871YMK-T5 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 MIC2871YMK-T5 meets industry standards.
7.What is the process for return or replacement of MIC2871YMK-T5?
All MIC2871YMK-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC2871YMK-T5, 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 MIC2871YMK-T5 part is unused and in its original packaging.
Return procedure for MIC2871YMK-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2871YMK-T5 Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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BCR421UW6-7
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
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