My Inquiry
My Account
Microchip Technology MIC2287-24BML-TR
- Part No.:
- MIC2287-24BML-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-VFDFN Exposed Pad, 8-MLF®
- Datasheet:
-
MIC2287-24BML-TR.pdf
- Description:
- IC LED DRVR RGLTR PWM 750MA 8MLF
- Quantity:
- Payment:
- Shipping:
Inventory:3,497
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC2287-24BML-TR from Micrel is a 1.2MHz PWM white LED driver IC optimized for constant-current backlighting of 3–6 series white LEDs, featuring 24V overvoltage protection (OVP), 95mV feedback reference, 2.5–10V input range, and 500mA switch current in an 8-lead 2mm × 2mm MLF™ package. It delivers uniform LED brightness in space-constrained portable devices.
For engineers reviewing the MIC2287-24BML-TR datasheet, MIC2287-24BML-TR pinout, MIC2287-24BML-TR application, or MIC2287-24BML-TR equivalent, key selection criteria include OVP threshold accuracy (21–24V), thermal shutdown at 150°C, 1.2MHz fixed-frequency operation for low EMI, and compatibility with standard 2mm × 2mm MLF™ land patterns.
Technical Context
The MIC2287-24BML-TR implements constant-frequency current-mode PWM control using an internal 1.2MHz oscillator, slope-compensated current amplifier, and gm error amplifier referenced to 95mV. Its bipolar output transistor supports up to 500mA switch current with 450mV saturation voltage at 0.5A.
OVP functionality is implemented via dedicated OVP pin tied to output voltage, triggering shutdown when sensed voltage exceeds 21–24V (typical 22.5V). The device integrates UVLO (2.1V turn-on), thermal shutdown (150°C), and <1µA shutdown current - 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 compact 10µH inductors and 0.22µF output capacitors, reducing board area. |
| Feedback Voltage | 95 mV ±5% - minimizes power loss in current-sense resistor and lowers total output voltage requirement. |
| OVP Threshold | 22.5 V (typ), 21–24 V (min–max) - clamps output to protect LEDs and external components in open-circuit failure. |
| 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 pre-regulation. |
| Switch Current Limit | 750 mA (min) - ensures robust drive for up to six 20mA white LEDs in series under worst-case conditions. |
| Shutdown Current | <1 µA - preserves battery life in portable devices during display-off states. |
| Junction Temp Range | –40°C to +125°C - validated for automotive cabin and industrial handheld environments. |
Pinout & Package
The MIC2287-24BML-TR is housed in an 8-lead 2mm × 2mm MLF™ (MicroLeadFrame) package with exposed thermal pad (EP) connected to GND. Pin 1 is SW, pin 2 is VIN, pin 3 is EN, pin 4 is GND, pin 5 is OVP, pin 6 is FB, pin 7 is AGND, pin 8 is PGND, and EP is internally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node | Internal bipolar collector output - connects to inductor and flyback diode anode; handles peak currents up to 2A. |
| VIN | Supply input | Power for internal circuitry (2.5–10V); bypassed with 1µF ceramic capacitor near pin. |
| EN | Enable control | Active-high logic input; drives internal bias circuits on/off - used for PWM dimming or system sleep control. |
| GND / AGND / PGND | Ground returns | Separate analog (AGND) and power (PGND) grounds minimize noise coupling into feedback path. |
| OVP | Overvoltage monitor | Direct connection to output node - triggers shutdown when voltage exceeds 22.5V threshold. |
| FB | Current sense input | 95mV reference point - LED current set by RFB = 95mV / ILED; high-impedance input (<450nA leakage). |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.2MHz PWM frequency | Reduces EMI and enables use of miniature passive components - no frequency variation with load or input. |
| Dedicated OVP pin (24V option) | Hardware-level protection against LED open-circuit failure - eliminates need for external zener clamp in MLF™ design. |
| 95mV feedback reference | Lowers power dissipation in current-sense resistor by >50% vs. conventional 200–300mV references. |
| Separate AGND and PGND pins | Prevents switching noise from corrupting current regulation accuracy - critical for <1% line/load regulation. |
| Thermal shutdown with 10°C hysteresis | Protects IC during sustained overload or poor PCB thermal design - auto-recovery avoids latch-up behavior. |
Applications
| Cell Phone Backlight | PDA Display Driver |
|---|---|
Use Scenario: Driving 4–6 white LEDs in series for main LCD backlight in GSM/UMTS handsets with single Li-ion cell supply. IC Role / Device Role / Timing Role: Constant-current boost regulator with integrated OVP - regulates LED current independent of forward voltage drift and battery discharge. Use Value: Ensures consistent brightness over full battery range (4.2V → 3.0V) while protecting against LED string open-circuit failure via 24V OVP clamp. | Use Scenario: Powering QVGA or VGA transflective LCD backlights in enterprise PDAs operating across –20°C to +70°C ambient. IC Role / Device Role / Timing Role: High-efficiency PWM LED driver with thermal shutdown - maintains regulated current despite temperature-induced LED VF shift. Use Value: Delivers >80% efficiency at 20mA per LED (3.6V input) and survives junction temperatures up to +125°C during extended operation. |
| Digital Camera Flash | GPS Handheld Backlight |
Use Scenario: Providing short-duration, high-brightness flash illumination using 3–4 white LEDs driven at 100–200mA pulse current. IC Role / Device Role / Timing Role: Fast-response boost controller with enable-pin PWM dimming - synchronizes LED flash timing with image capture sequence. Use Value: Achieves <10µs enable-to-output rise time and supports 1kHz–10kHz PWM dimming without efficiency penalty. | Use Scenario: Illuminating outdoor-readable monochrome or color LCDs in GPS navigation units powered by replaceable AA/AAA batteries. IC Role / Device Role / Timing Role: Low-quiescent-current LED driver with UVLO - extends battery life by disabling output below 2.1V input threshold. Use Value: Draws only 0.1µA in shutdown mode and maintains <1% load regulation across 5–20mA LED current range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3407MMX/NOPB | 1.6MHz switching frequency; 200mV feedback; no integrated OVP pin - requires external protection circuit. | Targeted at lower-cost consumer displays where OVP is implemented externally; lacks dedicated OVP pin like MIC2287-24BML-TR. | Select when board space allows external zener clamp and higher switching frequency is acceptable for smaller passives. |
| TPS61061DRVR | 1.2MHz operation; 200mV feedback; integrated 28V OVP; 600mA switch current; 2.7–5.5V input range only. | Battery voltage range limited to Li-ion nominal (2.7–5.5V); wider OVP tolerance (±5%) vs. MIC2287-24BML-TR's ±1.5V spec. | Choose for designs strictly using 3.0–4.2V Li-ion with need for higher switch current and tighter OVP accuracy. |
Compared with LM3407MMX/NOPB and TPS61061DRVR, the MIC2287-24BML-TR uniquely combines 24V OVP with 95mV feedback and full 2.5–10V input support - enabling robust, efficient LED drive across diverse battery chemistries without external protection components.
Availability
MIC2287-24BML-TR is available at Aetrix Electronics and suitable for cell phone backlighting, PDA display drivers, digital camera flash circuits, GPS handheld illumination, and industrial HMI panels requiring stable component supply and long-term lifecycle continuity.
Supply support for MIC2287-24BML-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 analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015. It specialized in power management, LED drivers, and timing solutions for portable and industrial markets.
The MIC2287 product line was designed specifically for high-efficiency, small-footprint white LED backlighting in battery-powered consumer electronics - emphasizing low quiescent current, integrated protection, and minimal external component count.
FAQ
What is the exact overvoltage protection threshold of the MIC2287-24BML-TR?
The MIC2287-24BML-TR has a guaranteed OVP threshold of 21V minimum and 24V maximum, with 22.5V typical. This value is factory-trimmed and specified across –40°C to +125°C junction temperature. The OVP function activates when the voltage applied to the OVP pin exceeds this threshold, forcing shutdown until the condition clears. This specification applies exclusively to the MIC2287-24BML-TR variant and is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of its official datasheet.
Can the MIC2287-24BML-TR drive eight white LEDs in series?
No - the MIC2287-24BML-TR is rated for up to six white LEDs in series due to its 24V OVP limit. While the base MIC2287 family supports up to eight LEDs with the 34V OVP variant (MIC2287-34BML), the MIC2287-24BML-TR's 24V clamp restricts safe operation to configurations where total LED forward voltage remains below ~21V (e.g., six 3.5V LEDs = 21V). Exceeding this risks premature OVP activation and unstable regulation. Always verify VF sum at operating current and temperature before finalizing LED count for MIC2287-24BML-TR.
Does the MIC2287-24BML-TR require an external soft-start capacitor?
No - the MIC2287-24BML-TR does not integrate soft-start circuitry and operates with inherent controlled start-up. However, an external soft-start network (e.g., 2200pF capacitor + 10kΩ resistor to FB) can be added to limit inrush current during cold start, especially when driving large output capacitance or high LED counts. This is optional and application-dependent; the MIC2287-24BML-TR functions correctly without it but may draw up to double nominal current briefly at turn-on.
What is the purpose of separate AGND and PGND pins on the MIC2287-24BML-TR?
The MIC2287-24BML-TR uses separate AGND (analog ground) and PGND (power ground) pins to isolate sensitive feedback circuitry from high-di/dt switching return paths. AGND carries only the low-current FB and OVP reference signals, while PGND handles the full switch-node return current. This separation prevents ground bounce from degrading current regulation accuracy - enabling the <1% line and load regulation performance specified for MIC2287-24BML-TR. Both pins must connect to the same system ground plane, ideally via low-inductance routes.
Is the MIC2287-24BML-TR RoHS-compliant and lead-free?
The MIC2287-24BML-TR is not lead-free; its ordering code "BML" indicates standard (SnPb) lead finish. For RoHS-compliant, lead-free alternatives, select the "YML" suffix variants such as MIC2287-24YML. The "BML" and "YML" versions share identical electrical specifications and package dimensions, differing only in surface finish and compliance status. Always verify material declarations and certificate of compliance for MIC2287-24BML-TR prior to high-reliability or export-controlled designs.
MIC2287-24BML-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:
- 24V
- 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)
MIC2287-24BML-TR FAQ
1.How can I place an order for MIC2287-24BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2287-24BML-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 MIC2287-24BML-TR reliable?
The price and inventory of MIC2287-24BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2287-24BML-TR is usually 5 days.
3.What payment methods are accepted for MIC2287-24BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2287-24BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2287-24BML-TR?
MIC2287-24BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2287-24BML-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 MIC2287-24BML-TR?
For technical support, including MIC2287-24BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2287-24BML-TR requirements.
6.How does Aetrix verify that MIC2287-24BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2287-24BML-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 MIC2287-24BML-TR meets industry standards.
7.What is the process for return or replacement of MIC2287-24BML-TR?
All MIC2287-24BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2287-24BML-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 MIC2287-24BML-TR part is unused and in its original packaging.
Return procedure for MIC2287-24BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2287-24BML-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…
