My Inquiry
My Account
Microchip Technology MIC3263YML-TR
- Part No.:
- MIC3263YML-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 24-VFQFN Exposed Pad, 24-MLF®
- Datasheet:
-
MIC3263YML-TR.pdf
- Description:
- IC LED DRVR RGLTR PWM 30MA 24MLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,970
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC3263YML-TR from Micrel is a six-channel constant-current white LED driver IC optimized for LCD backlighting with flicker-free PWM dimming. It operates from 6V–40V input, delivers up to 30mA per channel with ±3% current matching, and supports programmable switching frequency (400kHz–1.8MHz) in a 24-pin 4mm × 4mm MLF® package for notebook and industrial display systems.
For engineers reviewing the MIC3263YML-TR datasheet, MIC3263YML-TR pinout, MIC3263YML-TR application, or MIC3263YML-TR equivalent, key selection criteria include its 6-channel WLED sink architecture, ±2% initial LED current accuracy, 16-level logarithmic dimming (1%–100%), integrated OVP/thermal protection, and support for both internal resistor-programmed and external PWM dimming control at the DRC pin.
Technical Context
The MIC3263YML-TR implements a peak current-mode boost controller with three nested control loops: fast current amplifier loop (for per-channel LED current regulation), medium-speed booster loop (regulating VOUT via CRV reference), and slow CRV loop (maintaining IO collector voltage at ~1.2V to minimize bipolar transistor power loss). This architecture enables stable operation across wide input voltage and temperature ranges while preserving tight current matching.
Dimming is implemented via duty-cycle-to-level conversion: the DRC pin accepts 100Hz–40kHz external PWM signals, whose duty cycle maps to one of 16 discrete logarithmic dimming ratios (±6.25% step, 2% hysteresis between levels) to match human eye sensitivity and eliminate flicker. Internal dimming mode uses MODE/DFS pins with RDFS to set 100Hz–20kHz frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 40V - supports direct connection to multi-cell Li-ion batteries or industrial 24V rails without pre-regulation. |
| LED Channel Count & Max per Channel | 6 independent channels, up to 10 WLEDs in series per channel - enables full HD or larger panel backlighting with uniform brightness. |
| Per-Channel Current Range | 15mA to 30mA, set by ISET resistor - allows precise brightness tuning and thermal management across varying LED forward voltages. |
| Current Matching Accuracy | ±3% across all six channels at 30mA - ensures consistent luminance across display area without visible banding or gradients. |
| Dimming Resolution | 16 logarithmic levels (1%–100%), 2% hysteresis - matches photopic response and prevents level skipping during low-duty transitions. |
| Switching Frequency Range | 400kHz to 1.8MHz, resistor-programmable via FS pin - permits optimization of inductor size, EMI, and efficiency for specific board layout constraints. |
| Efficiency | Up to 90% at 12V input, 6×8 LEDs @20mA - reduces thermal load and extends battery life in portable displays. |
| Junction Temperature Range | −40°C to +125°C - qualified for automotive infotainment, industrial HMI, and ruggedized computing environments. |
Pinout & Package
Package: 24-pin 4mm × 4mm MLF® (exposed pad), Pb-free, RoHS-compliant, θJA = 43°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FS | Switching Frequency Set | Resistor-to-GND sets boost oscillator frequency (400kHz–1.8MHz); critical for EMI filtering and inductor selection. |
| RS | Slope Compensation Adjust | Connects to internal slope compensation network; stabilizes peak current-mode control under light loads. |
| OV / OVP | Overvoltage Protection Input | Monitors boost output via resistor divider; trips shutdown if VOUT exceeds programmed threshold (e.g., open-LED fault). |
| MODE / DFS | Dimming Mode & Frequency Select | MODE = LOW: 100Hz–2kHz dimming; MODE = HIGH: 1.5kHz–20kHz; DFS resistor programs exact frequency. |
| DRC | Dimming Ratio Control | Accepts external PWM signal (100Hz–40kHz); duty cycle converted to 16-level logarithmic dimming ratio with hysteresis. |
| ISET | LED Current Set | Resistor-to-GND programs all six channels identically (2kΩ = 30mA, 3kΩ = 20mA); defines max thermal dissipation per channel. |
| IO1–IO6 | LED Channel Sinks | Open-collector NPN outputs; each sinks up to 30mA with matched VCE(sat) to maintain ±3% current accuracy. |
| EN | Enable Control | Active-high logic input; <0.4V disables IC, reducing quiescent current to <20μA - essential for system-level power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Flicker-Free Dimming | Logarithmic 16-level PWM mapping with 2% hysteresis eliminates perceptible flicker and avoids eye fatigue in continuous-view applications. |
| Wide Input Voltage Range | 6V–40V operation accommodates 2–10 cell Li-ion packs and unregulated 24V industrial supplies without external DC/DC pre-regulation. |
| Accurate Multi-Channel Current Matching | ±3% matching across six channels ensures uniform screen brightness even with varying LED VF and thermal gradients. |
| Integrated Fault Protection | Detects open/short LED faults per channel and triggers individual channel shutdown; OVP and thermal shutdown prevent catastrophic failure. |
| Flexible Dimming Interface | Supports both resistor-programmed internal dimming (via MODE/DFS) and direct external PWM (DRC pin), enabling compatibility with MCU GPIO or dedicated timing controllers. |
| High Efficiency Boost Architecture | Peak current-mode control with programmable frequency achieves >90% efficiency, minimizing heat generation in space-constrained display bezels. |
Applications
| Notebook LCD Backlighting | Industrial HMI Display |
|---|---|
Use Scenario: Driving 6 parallel strings of 8 white LEDs in a 15.6-inch notebook display with dynamic brightness control. IC Role / Device Role / Timing Role: Constant-current WLED sink driver with integrated boost converter and flicker-free PWM dimming controller. Use Value: Enables seamless 1%–100% brightness adjustment across ambient light conditions while maintaining color consistency and eliminating visible PWM artifacts. | Use Scenario: Backlighting a 10.1-inch ruggedized HMI panel operating in −40°C to +85°C industrial environments. IC Role / Device Role / Timing Role: Six-channel LED driver with −40°C to +125°C junction rating and OVP/thermal fault protection for reliable long-term operation. Use Value: Delivers stable luminance over extreme temperature swings and survives voltage transients on 24V factory-floor power rails. |
| Automotive Infotainment Display | Gaming Console UI Panel |
Use Scenario: Powering dual-zone backlight in a 7-inch automotive center-stack display with CAN-controlled dimming profiles. IC Role / Device Role / Timing Role: High-voltage WLED driver supporting 12V/24V vehicle battery inputs and synchronized dimming via external PWM from microcontroller. Use Value: Meets automotive EMC requirements via programmable 400kHz–1.8MHz switching frequency and provides robust open-LED fault detection for safety-critical UIs. | Use Scenario: Backlighting high-refresh-rate OLED UI overlay in a handheld gaming device requiring ultra-low latency dimming response. IC Role / Device Role / Timing Role: Low-latency DRC-input PWM dimming controller with 100Hz–40kHz input support and sub-millisecond transient response. Use Value: Eliminates motion blur during rapid brightness transitions and maintains visual fidelity during fast-paced gameplay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar six-channel WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409MYX/NOPB | Single-channel buck-boost WLED driver; requires external MOSFETs and current sense resistors per channel. | Lacks integrated multi-channel current sinks; demands more board area and design effort for 6-string implementation. | Select when higher efficiency (>92%) at high current or discrete FET selection flexibility is prioritized over integration and footprint. |
| TPS61165DRVR | Single-channel boost WLED driver with I²C interface; no native 6-channel configuration or MLF package. | Requires six separate ICs and external multiplexing for equivalent functionality; lacks per-channel fault isolation. | Choose for designs needing digital dimming control or where space allows distributed drivers with independent thermal management. |
Compared with LM3409MYX/NOPB and TPS61165DRVR, the MIC3263YML-TR offers monolithic six-channel integration in a compact 4mm × 4mm package, eliminating external FETs, sense resistors, and inter-channel routing - reducing BOM count by >50% and simplifying thermal design for display backlighting.
Availability
MIC3263YML-TR is available at Aetrix Electronics and suitable for notebook backlighting, industrial HMI displays, automotive infotainment panels, and gaming console UIs requiring stable component supply across extended temperature and voltage ranges.
Supply support for MIC3263YML-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; known for high-reliability power management and timing solutions.
The MIC3263YML-TR belongs to Micrel's WLED backlight driver product line, designed specifically for flicker-free, high-accuracy multi-string LCD/OLED display illumination in portable and harsh-environment applications.
FAQ
What is the maximum number of white LEDs the MIC3263YML-TR can drive per channel?
The MIC3263YML-TR can drive up to ten white LEDs in series per channel, assuming typical forward voltage of 3.5V per LED and maximum boost output capability. At 30mA per channel, this supports configurations such as 6×8 LEDs for full HD notebook backlights. The actual count depends on total string VF, input voltage, and desired efficiency - verified in the Typical Application Schematic (Micrel M9999-012110, p.3).
How does the MIC3263YML-TR achieve flicker-free dimming?
The MIC3263YML-TR achieves flicker-free dimming through logarithmic 16-level PWM mapping with 2% hysteresis between adjacent levels, synchronized to human eye photopic response. Its DRC pin converts incoming PWM duty cycles into discrete dimming ratios (1%–100%), and internal circuitry filters jitter from the dimming control signal - eliminating visible flicker even at low brightness settings, as confirmed in Functional Characteristics (p.8–9) and Functional Description (p.12).
What protection features are integrated into the MIC3263YML-TR?
The MIC3263YML-TR integrates open-LED and short-LED fault detection per channel, overvoltage protection (OVP) on the boost output, thermal shutdown with 20°C hysteresis, and current limiting. Each IOx pin monitors collector voltage; <0.5V triggers open-LED shutdown, >7.5V indicates shorted LED, and OVP trips at 2.36V reference - all detailed in Fault Summary Table 1 (p.15) and Absolute Maximum Ratings (p.5).
Can the MIC3263YML-TR operate from a 12V automotive supply?
Yes, the MIC3263YML-TR supports 6V–40V input, making it compatible with nominal 12V automotive systems including cold-crank (down to ~6V) and load-dump (up to 40V) transients. Its −40°C to +125°C junction temperature range and integrated OVP/thermal protection ensure reliable operation in automotive infotainment displays, as specified in Operating Ratings (p.6) and Applications list (p.2).
What is the purpose of the CRV pin on the MIC3263YML-TR?
CRV (Capacitor Reference Voltage) is a feedback node that sets the reference for the boost converter's error amplifier. A 2.2µF capacitor connects CRV to GND, and the CRV loop dynamically charges/discharges this capacitor to maintain IOx collector voltage at ~1.2V - keeping the internal bipolar transistors in linear region for precise current regulation while minimizing power loss, as explained in Functional Description (p.12–13) and Pin Description (p.4).
MIC3263YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad, 24-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 6
- Voltage - Supply (Min):
- 6V
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- -
- Current - Output / Channel:
- 30mA
- Frequency:
- 1.2MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-MLF® (4x4)
MIC3263YML-TR FAQ
1.How can I place an order for MIC3263YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC3263YML-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 MIC3263YML-TR reliable?
The price and inventory of MIC3263YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC3263YML-TR is usually 5 days.
3.What payment methods are accepted for MIC3263YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC3263YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC3263YML-TR?
MIC3263YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC3263YML-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 MIC3263YML-TR?
For technical support, including MIC3263YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC3263YML-TR requirements.
6.How does Aetrix verify that MIC3263YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC3263YML-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 MIC3263YML-TR meets industry standards.
7.What is the process for return or replacement of MIC3263YML-TR?
All MIC3263YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC3263YML-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 MIC3263YML-TR part is unused and in its original packaging.
Return procedure for MIC3263YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC3263YML-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…
