My Inquiry
My Account
Microchip Technology MIC2287-34BML-TR
- Part No.:
- MIC2287-34BML-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-VFDFN Exposed Pad, 8-MLF®
- Datasheet:
-
MIC2287-34BML-TR.pdf
- Description:
- IC LED DRVR RGLTR PWM 750MA 8MLF
- Quantity:
- Payment:
- Shipping:
Inventory:1,940
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC2287-34BML-TR from Micrel is a 1.2MHz PWM white LED driver IC optimized for constant-current boost operation, featuring 34V overvoltage protection (OVP), 95mV feedback reference, and 500mA switch current capability. It drives up to 6-series white LEDs from a 2.5V–10V input, targeting compact portable backlighting applications with minimal external components.
For engineers reviewing the MIC2287-34BML-TR datasheet, MIC2287-34BML-TR pinout, MIC2287-34BML-TR application, or MIC2287-34BML-TR equivalent, key selection criteria include OVP threshold accuracy, 95mV FB voltage tolerance, thermal shutdown behavior at 150°C, and compatibility with 2mm × 2mm MLF™-8 layout constraints.
Technical Context
The MIC2287-34BML-TR implements constant-frequency current-mode PWM control using an internal 1.2MHz oscillator, slope-compensated current amplifier, and gm error amplifier. Its 95mV feedback reference minimizes power loss in the current-sense resistor while enabling precise LED current regulation via ILED = 95mV / RFB.
OVP functionality is implemented via dedicated OVP pin monitoring output voltage against a factory-trimmed 34V threshold, triggering shutdown if exceeded. The device integrates bipolar switching transistor, UVLO (2.1V typ), and thermal shutdown with 10°C hysteresis - all operating across –40°C to +125°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.2 MHz ±12.5% - enables use of small 10µH inductors and 0.22µF output capacitors to minimize PCB area. |
| Feedback Voltage | 95 mV ±5% - sets LED current with high precision while reducing sense-resistor power dissipation. |
| OVP Threshold | 32 V to 34 V - clamps output during open-circuit LED failure, protecting SW node from exceeding 34V absolute max rating. |
| Input Voltage Range | 2.5 V to 10 V - supports single-cell Li-ion (3.0–4.2V) and multi-cell alkaline/NiMH inputs without external regulators. |
| Switch Current Limit | 750 mA typ - sustains >500mA continuous conduction for driving 6-series white LEDs at 20mA each. |
| Shutdown Current | ≤1 µA at VEN = 0V - preserves battery life in portable devices during display-off states. |
| Junction Temp Range | –40°C to +125°C - ensures reliable operation in handheld enclosures with limited airflow and thermal mass. |
Pinout & Package
Package: 8-pin 2mm × 2mm MLF™ (MicroLeadFrame) with exposed thermal pad (EP), standard lead finish, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OVP) | Overvoltage protection monitor input | Connects directly to boost output node; triggers shutdown when voltage exceeds 34V threshold. |
| 2 (GND) | Analog ground reference | Provides low-noise return path for FB and OVP comparators; separate from power ground. |
| 3 (FB) | Current-sense feedback input | Accepts cathode-side voltage drop across external RFB; regulates LED current to 95mV / RFB. |
| 4 (EN) | Enable logic input | Active-high control: ≥1.5V enables switching; ≤0.4V disables regulator and reduces IQ to <1µA. |
| 5 (NC) | No-connect terminal | Internally unconnected; must be left floating or tied to GND per layout best practices. |
| 6 (VIN) | Main supply input | Accepts 2.5–10V input; powers internal circuitry and bias networks; requires local 1µF ceramic decoupling. |
| 7 (SW) | Switch node output | Drives external inductor; connects to internal bipolar transistor collector; rated for –0.3V to 34V. |
| 8 (PGND) | Power ground return | High-current return path for switch node; must be routed separately from AGND and tied at single point under EP. |
| EP | Exposed thermal pad | Primary thermal path to PCB; must be soldered to solid copper pour for θJA = 93°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| 34V integrated OVP | Prevents destructive overvoltage during LED string open-circuit faults without requiring external zener clamp. |
| 95mV precision FB reference | Reduces sense-resistor power loss by >50% vs. typical 200mV references, extending battery runtime. |
| 1.2MHz fixed-frequency PWM | Enables use of sub-1206 inductors and 0402/0603 capacitors, cutting solution size by ~40% vs. 500kHz designs. |
| Thermal shutdown with hysteresis | Shuts down at 150°C and re-enables at 140°C, preventing thermal runaway in sealed enclosures. |
| UVLO with 2.1V threshold | Blocks operation below safe Li-ion discharge voltage, avoiding brownout-induced instability. |
Applications
| Cell Phone Backlighting | Digital Camera Flash |
|---|---|
Use Scenario: Driving 4–6 white LEDs in series for LCD backlight in slim smartphone form factors with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED string current via 95mV FB reference and 1.2MHz PWM switching. Use Value: Eliminates ballast resistors, reduces total BOM count by 3–5 passive components, and maintains uniform brightness across temperature. |
Use Scenario: Providing short-duration, high-intensity flash illumination for mobile digital cameras using 3–4 white LEDs. IC Role / Device Role / Timing Role: High-efficiency boost driver delivering pulsed 20–30mA LED current with fast enable/disable response (<10µs). Use Value: Achieves >82% efficiency at 3.6V input and 6-series load, minimizing heat generation during burst-mode flash operation. |
| GPS System Display | MP3 Player UI Lighting |
Use Scenario: Powering always-on monochrome or color TFT backlight in automotive-grade GPS units operating from 12V DC-DC converted to 3.3V. IC Role / Device Role / Timing Role: OVP-protected LED driver maintaining stable current despite wide input voltage transients and ambient temperature swings. Use Value: 34V OVP prevents damage during load-dump events; –40°C to +125°C rating ensures reliability in vehicle cabin environments. |
Use Scenario: Illuminating OLED or segment LCD user interface in portable audio players powered by 2xAA or Li-poly batteries. IC Role / Device Role / Timing Role: Low-quiescent-current (≤1µA shutdown) LED driver supporting PWM dimming via EN pin for adjustable brightness. Use Value: Extends playback time by >15% vs. non-shutdown drivers during UI-inactive periods, verified at 3.0V input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1910ETE+ | 2.5–5.5V input range; 28V OVP; 1.3MHz switching; uses external MOSFET instead of integrated bipolar switch. | Requires external high-side N-MOSFET and gate driver; less suitable for space-constrained layouts. | Select when higher efficiency (>85%) at light loads is required and board area allows discrete FET placement. |
| TPS61160DRVR | 2.7–5.5V input; 28V OVP; 1.2MHz; integrated 1.5A MOSFET; 1.24V FB reference (not 95mV). | Higher FB voltage increases sense-resistor power loss; lacks dedicated OVP pin (uses FB-based detection). | Choose for higher peak current capability (1.5A) in flash applications where 34V OVP is not mandatory. |
Compared with MIC2287-34BML-TR, MAX1910ETE+ offers wider efficiency optimization but adds layout complexity, while TPS61160DRVR provides higher switch current but sacrifices OVP precision and increases sense-resistor thermal load due to 1.24V reference.
Availability
MIC2287-34BML-TR is available at Aetrix Electronics and suitable for cell phone backlighting, digital camera flash, GPS system displays, MP3 player UI lighting, and portable medical device indicators requiring stable component supply and long-term lifecycle support.
Supply support for MIC2287-34BML-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, Inc. was a U.S.-based analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015. It specialized in power management, timing, and interface ICs for portable and industrial markets.
The MIC2287 product line was designed specifically for space-constrained, battery-powered white LED backlighting and flash applications, emphasizing high-frequency operation, low-feedback-voltage precision, and integrated fault protection.
FAQ
What is the exact overvoltage protection threshold for MIC2287-34BML-TR?
The MIC2287-34BML-TR features a factory-trimmed overvoltage protection threshold of 34V, with guaranteed limits of 30V minimum and 34V maximum across –40°C to +125°C. This value is specific to the SLC marking variant and is implemented via a dedicated OVP pin that monitors the boost output directly.
Can MIC2287-34BML-TR drive 8 white LEDs in series?
No - the MIC2287-34BML-TR is rated for up to 6-series white LEDs, as confirmed by its 34V OVP limit and typical forward voltage assumptions (3.2V × 6 = 19.2V). Driving 8 LEDs would require ≥25.6V output, risking OVP activation under normal operation and violating design intent stated in the datasheet.
What package type does MIC2287-34BML-TR use, and is thermal pad connection required?
MIC2287-34BML-TR uses the 8-pin 2mm × 2mm MLF™ package with exposed thermal pad (EP). Yes - the EP must be soldered to a PCB copper pour to achieve the specified θJA of 93°C/W; omitting this connection degrades thermal performance and risks premature thermal shutdown.
How does MIC2287-34BML-TR implement PWM dimming?
MIC2287-34BML-TR supports PWM dimming via its EN pin: applying a logic-high signal (≥1.5V) enables switching, while logic-low (≤0.4V) shuts down the regulator completely. This method achieves high efficiency because both the IC and LEDs draw near-zero current during off cycles, with recommended PWM frequencies between 100Hz and 10kHz.
Is the 95mV feedback voltage on MIC2287-34BML-TR adjustable or fixed?
The 95mV feedback voltage on MIC2287-34BML-TR is a fixed, factory-trimmed internal reference with ±5% tolerance (90–100mV). It is not adjustable; LED current is set externally by selecting RFB using ILED = 95mV / RFB, and no external compensation or trimming is supported.
MIC2287-34BML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad, 8-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 34V
- Current - Output / Channel:
- 750mA (Switch)
- Frequency:
- 1.2MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MLF® (2x2)
MIC2287-34BML-TR FAQ
1.How can I place an order for MIC2287-34BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2287-34BML-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 MIC2287-34BML-TR reliable?
The price and inventory of MIC2287-34BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2287-34BML-TR is usually 5 days.
3.What payment methods are accepted for MIC2287-34BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2287-34BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2287-34BML-TR?
MIC2287-34BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2287-34BML-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 MIC2287-34BML-TR?
For technical support, including MIC2287-34BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2287-34BML-TR requirements.
6.How does Aetrix verify that MIC2287-34BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2287-34BML-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 MIC2287-34BML-TR meets industry standards.
7.What is the process for return or replacement of MIC2287-34BML-TR?
All MIC2287-34BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2287-34BML-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 MIC2287-34BML-TR part is unused and in its original packaging.
Return procedure for MIC2287-34BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2287-34BML-TR Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
