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Microchip Technology MIC2287C-24BML-TR
- Part No.:
- MIC2287C-24BML-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-VFDFN Exposed Pad, 8-MLF®
- Datasheet:
-
MIC2287C-24BML-TR.pdf
- Description:
- IC LED DRVR RGLTR PWM 750MA 8MLF
- Quantity:
- Payment:
- Shipping:
Inventory:3,520
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Product details
Overview
MIC2287C-24BML-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 24V 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 LCD backlighting for GPS systems and digital cameras.
For engineers reviewing the MIC2287C-24BML-TR datasheet, MIC2287C-24BML-TR pinout, MIC2287C-24BML-TR application, or MIC2287C-24BML-TR equivalent, key selection criteria include OVP threshold accuracy, 95mV FB tolerance, thermal shutdown behavior at +105°C, and compatibility with 10µH/0.22µF external component sets for 6-LED strings.
Technical Context
The MIC2287C-24BML-TR implements a constant-frequency, current-mode PWM boost regulator with internal bipolar switch and slope-compensated control loop. Its 1.2MHz oscillator enables compact 10µH inductors and 0.22µF output capacitors while minimizing input ripple injection into Li-ion battery sources.
It uses a 95mV precision feedback reference to set LED current via external resistor (ILED = 95mV/RFB) and integrates dedicated OVP monitoring on Pin 1 (OVP) that clamps output at 19–26V (typical 24V). The device includes UVLO (2.1V typ), thermal shutdown at 150°C, and –40°C to +105°C junction operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.2 MHz ±125 kHz - enables use of small 10 µH inductors and 0.22 µF ceramic output capacitors. |
| Feedback Voltage | 95 mV ±10 mV - sets LED current with minimal power loss in sense resistor; ILED = 95 mV / RFB. |
| OVP Threshold | 24 V (19–26 V range) - protects against open-circuit LED failure by clamping output voltage at safe level. |
| Input Voltage Range | 2.5 V to 10 V - supports single-cell Li-ion (3.0–4.2 V) and multi-cell alkaline/NiMH inputs. |
| Switch Current Limit | 750 mA - sustains >500 mA continuous switch current for driving 6-series white LEDs at ~20 mA each. |
| Junction Temp Range | –40°C to +105°C - ensures reliable operation in handheld consumer devices under sustained brightness. |
| Quiescent Current | 2.5–5 mA - minimizes standby drain during active regulation; drops to 0.1–1 µA in shutdown mode. |
Pinout & Package
The MIC2287C-24BML-TR is housed in an 8-lead 2mm × 2mm MLF™ package with exposed thermal pad (EP). Pin 1 is OVP; Pin 2 is VIN; Pin 3 is EN; Pin 4 is GND; Pin 5 is SW; Pin 6 is FB; Pin 7 is AGND; Pin 8 is PGND. The EP pad must be soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OVP (Pin 1) | OVP monitor input | Connects directly to output node; triggers clamp when voltage exceeds 24 V threshold. |
| VIN (Pin 2) | Main supply input | Accepts 2.5–10 V; powers internal circuitry and bias networks; requires local 1 µF bypass capacitor. |
| EN (Pin 3) | Enable control | Logic-high (>1.5 V) enables switching; logic-low (<0.4 V) disables regulator and reduces IIN to <1 µA. |
| GND (Pin 4) | Analog ground reference | Reference for FB and OVP comparators; separate from power ground to reduce noise coupling. |
| SW (Pin 5) | Switch node | Internal bipolar collector output; connects to inductor and Schottky diode anode; handles >500 mA peak current. |
| FB (Pin 6) | Current-sense feedback | 95 mV reference point; cathode of LED string connects here; sets ILED via RFB to ground. |
| AGND (Pin 7) | Analog ground | Dedicated analog return path; must be routed separately from PGND and tied at single point near IC. |
| PGND (Pin 8) | Power ground | High-current return for SW node and internal switch; connects to EP pad and output capacitor ground. |
Key Features
| Feature | Design Value |
|---|---|
| 1.2 MHz fixed-frequency PWM | Enables use of miniature 10 µH inductors and 0.22 µF ceramic capacitors-reducing board area by >40% vs. 500 kHz designs. |
| 24 V OVP with dedicated pin | Prevents destructive overvoltage during LED open-circuit faults without requiring external zener or divider networks. |
| 95 mV feedback reference | Reduces power dissipation in current-sense resistor by ~5× versus 1 V references, extending battery life in portable devices. |
| –40°C to +105°C operation | Validated across full industrial temperature range; no derating required for handheld GPS or camera backlighting applications. |
| Integrated bipolar switch | Eliminates need for external MOSFET or BJT; simplifies layout and improves reliability in space-constrained SMT designs. |
Applications
| Cell Phone Backlighting | GPS System Display |
|---|---|
Use Scenario: Driving 3–4 white LEDs in series for main LCD backlight in slim mobile handsets powered by single-cell Li-ion. IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED string current at 15–20 mA with PWM dimming via EN pin. Use Value: 95 mV FB reference minimizes heat in current-set resistor; 1.2 MHz switching avoids audible noise and allows ultra-thin PCB stackup. | Use Scenario: Powering 6-series white LED backlight for outdoor-readable color LCD in automotive-grade GPS units. IC Role / Device Role / Timing Role: High-voltage boost driver with 24 V OVP ensuring fault tolerance during vibration-induced LED disconnection. Use Value: 24 V OVP threshold matches typical 6-LED forward voltage (~18–21 V), preventing false trips while guarding against catastrophic overvoltage. |
| Digital Camera LCD | MP3 Player Interface |
Use Scenario: Bright, flicker-free backlight for high-resolution rear LCD in compact digital cameras with limited battery capacity. IC Role / Device Role / Timing Role: Efficiency-optimized LED driver supporting both PWM and analog dimming modes via EN and FB pins. Use Value: >80% efficiency at 3.6 V input and 20 mA load (6-LED string) extends playback time; thermal shutdown prevents overheating during extended video review. | Use Scenario: Low-profile backlight for OLED or TFT display in pocket-sized MP3 players using coin-cell or Li-poly battery. IC Role / Device Role / Timing Role: Compact white LED driver in 2 mm × 2 mm MLF™ package enabling <0.8 mm profile PCB designs. Use Value: 2mm × 2mm MLF™ footprint saves >60% board area vs. SOT-23-5; exposed pad ensures thermal stability at full brightness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16832ATA+T | 40V OVP, 2.1–28V input, 1.3 MHz, but uses external MOSFET and requires higher gate drive overhead. | Targets higher-output industrial LED arrays; not optimized for sub-10 mm² portable footprints. | Select when >34 V OVP or programmable frequency is required; avoid if board space or BOM count are critical. |
| TPS61165DRVR | 2.7–6.5V input, 38V OVP, integrated 1.6A FET, but lacks dedicated OVP pin and uses 1.2V FB reference. | Better suited for single-cell Li-ion with tight input range; less tolerant of open-circuit faults without external OVP network. | Choose for cost-sensitive designs where external OVP components are acceptable; not drop-in for MIC2287C-24BML-TR's 24V OVP assurance. |
Compared with MAX16832ATA+T and TPS61165DRVR, the MIC2287C-24BML-TR delivers tighter OVP accuracy (±1.5 V), lower FB voltage (95 mV vs. 1.2 V), and smaller 2 mm × 2 mm footprint-making it optimal for space-constrained, battery-powered 6-LED backlighting where fault resilience and efficiency are prioritized.
Availability
MIC2287C-24BML-TR is available at Aetrix Electronics and suitable for cell phone backlighting, GPS display illumination, and digital camera LCD applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC2287C-24BML-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 semiconductor company specializing in analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC2287C product line was designed specifically for high-efficiency, compact white LED backlighting in portable consumer electronics-emphasizing low quiescent current, integrated protection, and minimal external component count.
FAQ
What is the exact overvoltage protection threshold for MIC2287C-24BML-TR?
The MIC2287C-24BML-TR has a nominal OVP threshold of 24 V, with guaranteed operating range of 19 V to 26 V at TJ = 25°C. This threshold is factory-trimmed and applies specifically to the "SLB" marked variant in the 8-pin MLF™ package. The OVP function activates only when the voltage at Pin 1 (OVP) exceeds this threshold, clamping output to prevent damage during LED open-circuit faults.
Can MIC2287C-24BML-TR drive six white LEDs from a 3.6 V Li-ion source?
Yes, the MIC2287C-24BML-TR is validated to drive six series white LEDs (total VF ≈ 18–21 V) from a 3.6 V input using a 10 µH inductor and 0.22 µF output capacitor. Efficiency exceeds 80% under these conditions, and the 24 V OVP provides headroom for transient overvoltage while avoiding false triggering during normal operation.
Does MIC2287C-24BML-TR require an external zener diode for overvoltage protection?
No, the MIC2287C-24BML-TR integrates dedicated OVP circuitry accessible via Pin 1 (OVP) and does not require an external zener diode. Unlike the SOT-23-5 variants (e.g., MIC2287CBD5), the MLF™-8 package provides a dedicated OVP pin with factory-set 24 V threshold-eliminating external components and improving fault response time.
What is the recommended inductor value for MIC2287C-24BML-TR in a 6-LED configuration?
The recommended inductor value for MIC2287C-24BML-TR driving six white LEDs is 10 µH, with saturation current rating ≥750 mA. Murata LQH43MN100K21 and TDK NLC453232T-100K are validated options. This value balances peak current ripple, efficiency (>80%), and physical size in the 2 mm × 2 mm MLF™ layout.
How does the 95 mV feedback voltage improve system efficiency in MIC2287C-24BML-TR?
The 95 mV feedback voltage in MIC2287C-24BML-TR reduces power dissipation in the current-sense resistor by approximately 12× compared to a 1.2 V reference, directly extending battery runtime. For a 20 mA LED current, RFB = 4.75 Ω dissipates only 38 µW-versus 480 µW with a 1.2 V reference-while maintaining precise current regulation.
MIC2287C-24BML-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:
- -
- 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-24BML-TR FAQ
1.How can I place an order for MIC2287C-24BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2287C-24BML-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-24BML-TR reliable?
The price and inventory of MIC2287C-24BML-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-24BML-TR is usually 5 days.
3.What payment methods are accepted for MIC2287C-24BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2287C-24BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2287C-24BML-TR?
MIC2287C-24BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2287C-24BML-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-24BML-TR?
For technical support, including MIC2287C-24BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2287C-24BML-TR requirements.
6.How does Aetrix verify that MIC2287C-24BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2287C-24BML-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-24BML-TR meets industry standards.
7.What is the process for return or replacement of MIC2287C-24BML-TR?
All MIC2287C-24BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2287C-24BML-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-24BML-TR part is unused and in its original packaging.
Return procedure for MIC2287C-24BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2287C-24BML-TR Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
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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
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BCR421UFD-7
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