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Microchip Technology MIC2287C-34YML-TR
- Part No.:
- MIC2287C-34YML-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-VFDFN Exposed Pad, 8-MLF®
- Datasheet:
-
MIC2287C-34YML-TR.pdf
- Description:
- IC LED DRVR RGLTR PWM 750MA 8MLF
- Quantity:
- Payment:
- Shipping:
Inventory:3,559
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Product details
Overview
MIC2287C-34YML-TR from Micrel is a 1.2MHz PWM white LED driver IC optimized for constant-current backlighting of up to six series-connected LEDs. It features 34V overvoltage protection (OVP), 95mV feedback reference, 2.5–10V input range, >500mA switch current, and operates in an 8-lead 2mm × 2mm MLF™ package. It is used in portable consumer devices requiring compact, high-efficiency LED biasing with open-circuit protection.
For engineers reviewing the MIC2287C-34YML-TR datasheet, MIC2287C-34YML-TR pinout, MIC2287C-34YML-TR application, or MIC2287C-34YML-TR equivalent, this page delivers verified technical context, exact pin functions, real-world dimming methods (PWM and analog), OVP-level-specific design implications, and validated alternative options for 34V-OVP LED boost drivers.
Technical Context
The MIC2287C-34YML-TR implements a constant-frequency, current-mode PWM boost topology with internal bipolar switch and gm error amplifier. Its 1.2MHz oscillator enables small external inductors (e.g., 10µH) and capacitors (e.g., 0.22µF), reducing board area while minimizing input ripple and EMI compared to variable-frequency alternatives.
OVP functionality is implemented via dedicated OVP pin (Pin 1) tied to output voltage, triggering shutdown when output exceeds 32–37V (typ. 34V). The 95mV FB reference minimizes I²R loss in current-sense resistors, directly improving battery runtime in single-cell Li-ion systems (2.5–4.2V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.2 MHz ±15% - Enables use of 10 µH inductors and 0.22 µF ceramic output capacitors, reducing solution size by >40% vs. 500 kHz designs. |
| Feedback Voltage | 95 mV ±10% - Sets LED current as ILED = 95 mV / RFB; low reference reduces power loss in sense resistor and extends battery life. |
| OVP Threshold | 34 V (min 32 V, max 37 V) - Clamps output during LED open-circuit fault; matches 6-series white LED string (≈21–24 V nominal) with safety margin. |
| Input Voltage Range | 2.5 V to 10 V - Supports single-cell Li-ion (2.7–4.2 V), Li-polymer, and 3.3 V/5 V rail inputs without pre-regulation. |
| Switch Current Limit | 750 mA (typ.) - Sustains >500 mA continuous switch current, sufficient to drive 20 mA per LED across 6-series strings at >90% efficiency. |
| Junction Temp Range | –40°C to +105°C - Qualified for operation in handheld enclosures under sustained brightness and ambient temperature stress. |
| Package | 8-pin 2 mm × 2 mm MLF™ with exposed pad - Provides 93°C/W θJA, enabling 600 mW dissipation at 105°C ambient without forced airflow. |
Pinout & Package
Package: 8-lead 2 mm × 2 mm MLF™ (Moisture-Sensitive Level 3, Pb-free, RoHS-compliant). Exposed thermal pad (EP) must be soldered to PCB ground plane for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OVP) | Overvoltage protection monitor input | Connected directly to boost output node; triggers shutdown if voltage exceeds 34 V threshold - critical for open-LED fault safety. |
| 2 (VIN) | Power supply input | Accepts 2.5–10 V; powers internal circuitry and gate drive; requires local 1 µF ceramic bypass near pin. |
| 3 (EN) | Enable control input | Logic-high (>1.5 V) enables switching; logic-low (<0.4 V) disables regulator and reduces quiescent current to ≤1 µA. |
| 4 (GND) | Analog ground reference | Reference for FB and OVP comparators; must be routed separately from power ground to avoid noise coupling. |
| 5 (SW) | Switch node output | Drives external inductor; connects to collector of internal bipolar transistor; handles peak currents >750 mA. |
| 6 (FB) | Current-sense feedback input | Monitors voltage across external RFB; regulates LED current to 95 mV / RFB; high-impedance input (±450 nA bias). |
| 7 (AGND) | Analog ground | Dedicated ground for precision analog blocks (error amp, OVP comparator); ties to GND pin externally. |
| 8 (PGND) | Power ground return | Low-impedance return path for switch current; must connect to exposed pad and minimize loop area with SW and VIN paths. |
Key Features
| Feature | Design Value |
|---|---|
| 34 V OVP with dedicated pin | Hardware-enforced output clamping prevents SW node overvoltage during LED string disconnection - eliminates need for external zener clamp in MLF™ layout. |
| 95 mV precision feedback reference | Reduces sense-resistor power loss by ~50% vs. 200 mV references, directly extending battery runtime in portable Li-ion applications. |
| 1.2 MHz fixed-frequency PWM | Enables full LED current regulation using 10 µH inductors and 0.22 µF X5R/X7R ceramics - cuts BOM cost and footprint vs. lower-frequency alternatives. |
| Two dimming modes | Supports both PWM EN-pin dimming (100 Hz–10 kHz) and analog FB-pin dimming (DAC or filtered PWM) - gives system designers flexibility in EMI and flicker trade-offs. |
| –40°C to +105°C operation | Validated performance across industrial temperature range ensures reliability in sealed handheld enclosures under sustained brightness load. |
Applications
| Cell Phone Backlighting | PDA Display Illumination |
|---|---|
Use Scenario: Driving 3–6 white LEDs in series for main LCD backlight in GSM/UMTS smartphones with single-cell Li-ion battery (3.0–4.2 V). IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED string current to 15–25 mA with 1.2 MHz PWM dimming synchronized to display frame rate. Use Value: 34 V OVP protects against open-circuit failure during drop events; 95 mV FB reference improves runtime by 8–12% versus 200 mV competitors. |
Use Scenario: Powering QVGA or VGA transflective LCD backlights in enterprise PDAs operating across –20°C to +60°C ambient. IC Role / Device Role / Timing Role: High-efficiency current source delivering stable 20 mA per LED despite battery voltage sag from 4.2 V to 3.2 V. Use Value: 2 mm × 2 mm MLF™ package fits tight board space; –40°C to +105°C rating ensures startup and regulation at cold storage temperatures. |
| Digital Camera Flash/Backlight | GPS Handheld Display |
Use Scenario: Dual-role support: steady backlight for preview mode and pulsed flash assist (via EN pin PWM) in compact digital cameras. IC Role / Device Role / Timing Role: Switches between 20 mA continuous (backlight) and 100–200 mA pulsed (flash assist) using same external components. Use Value: Single IC replaces discrete boost + linear driver; 1.2 MHz operation avoids audible coil whine during video recording. |
Use Scenario: Driving 4-series white LED backlight in ruggedized GPS units exposed to automotive cabin temperatures (–30°C to +85°C). IC Role / Device Role / Timing Role: Regulates LED current independent of 12 V vehicle supply fluctuations via buck-boost front-end or direct 3.3 V LDO rail. Use Value: 34 V OVP accommodates transient surges on automotive rails; MLF™ thermal pad maintains <105°C junction under continuous 25 mA load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1910EEE+ | 2.5–5.5 V input; 28 V OVP; 1.2 MHz; 900 mA switch; 8-pin µMAX | Limited to ≤5-series LEDs due to 28 V OVP; no dedicated OVP pin - requires external sensing network. | Prefer for cost-sensitive 4-LED designs where 34 V headroom is unnecessary and µMAX footprint is acceptable. |
| TPS61160DRVR | 2.7–5.5 V input; 38 V OVP; 1.2 MHz; 400 mA switch; 6-pin WSON | Lower switch current limits max LED current to 15 mA per string; no analog dimming via FB pin. | Choose when 38 V OVP margin is required and system uses only PWM dimming; smaller 2 × 2 mm WSON saves area but lacks AGND/PGND separation. |
Compared with MIC2287C-34YML-TR, MAX1910EEE+ offers higher switch current but lacks dedicated OVP pin and 34 V threshold, while TPS61160DRVR provides higher OVP headroom but restricts LED current capability and removes analog dimming flexibility - MIC2287C-34YML-TR uniquely balances 34 V OVP, 750 mA switch, dual-dimming, and MLF™ thermal performance.
Availability
MIC2287C-34YML-TR is available at Aetrix Electronics and suitable for cell phone backlighting, PDA display illumination, digital camera LED drivers, and GPS handheld displays requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for MIC2287C-34YML-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
Micrel (acquired by Microchip in 2015) was a U.S.-based analog and mixed-signal IC designer specializing in power management, timing, and interface solutions for portable and industrial markets.
The MIC2287C family was designed specifically for high-efficiency, space-constrained white LED backlighting in battery-powered consumer electronics - emphasizing low quiescent current, integrated protection, and minimal external component count.
FAQ
What is the OVP threshold accuracy for MIC2287C-34YML-TR?
The MIC2287C-34YML-TR guarantees an OVP threshold of 32 V (min), 34 V (typ), and 37 V (max) across –40°C to +105°C. This 34 V nominal setting is factory-trimmed and tested per unit; it is not adjustable and applies only when the OVP pin is connected directly to the boost output node.
Can MIC2287C-34YML-TR drive more than six white LEDs?
No - MIC2287C-34YML-TR is characterized and specified for up to six series white LEDs (≈21–24 V nominal forward voltage). Attempting to drive seven or more LEDs risks exceeding the 34 V OVP threshold during startup or temperature drift, causing repeated shutdowns and potential instability.
Does MIC2287C-34YML-TR support analog dimming, and how is it implemented?
Yes - MIC2287C-34YML-TR supports analog dimming by applying a DC voltage (0–95 mV) to the FB pin through a series resistor. This overrides the internal 95 mV reference, proportionally reducing regulated LED current. A DAC or filtered PWM signal can serve as the control source, enabling flicker-free dimming above 10 kHz.
What is the purpose of separate AGND and PGND pins on MIC2287C-34YML-TR?
AGND (Pin 4) serves as the quiet reference for the FB and OVP comparators, while PGND (Pin 8) carries high di/dt switch return current. Separating them prevents noise coupling from power switching into the precision current-sense path - maintaining regulation accuracy and preventing false OVP trips during heavy load transients.
Is MIC2287C-34YML-TR pin-compatible with other MIC2287C variants like MIC2287C-24YML?
No - all MIC2287C-XXYML variants share identical 8-pin MLF™ pinout and mechanical footprint, but OVP threshold is factory-set and non-configurable. Swapping MIC2287C-34YML-TR for MIC2287C-24YML changes the protection level from 34 V to 24 V, which may cause premature shutdown in 6-LED applications.
MIC2287C-34YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad, 8-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.5V
- Voltage - Supply (Max):
- 10V
- Voltage - Output:
- -
- Current - Output / Channel:
- 750mA (Switch)
- Frequency:
- 1.2MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 105°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MLF® (2x2)
MIC2287C-34YML-TR FAQ
1.How can I place an order for MIC2287C-34YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2287C-34YML-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 MIC2287C-34YML-TR reliable?
The price and inventory of MIC2287C-34YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2287C-34YML-TR is usually 5 days.
3.What payment methods are accepted for MIC2287C-34YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2287C-34YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2287C-34YML-TR?
MIC2287C-34YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2287C-34YML-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 MIC2287C-34YML-TR?
For technical support, including MIC2287C-34YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2287C-34YML-TR requirements.
6.How does Aetrix verify that MIC2287C-34YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2287C-34YML-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 MIC2287C-34YML-TR meets industry standards.
7.What is the process for return or replacement of MIC2287C-34YML-TR?
All MIC2287C-34YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2287C-34YML-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 MIC2287C-34YML-TR part is unused and in its original packaging.
Return procedure for MIC2287C-34YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2287C-34YML-TR Tags
-
BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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