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Microchip Technology MSL3088-IU
- Part No.:
- MSL3088-IU
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MSL3088-IU.pdf
- Description:
- IC LED DRVR CTRL PWM 60MA 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,628
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Product details
Overview
MSL3088-IU from Microchip Technology (formerly Atmel) is an 8-channel LED driver IC with integrated boost controller, designed for LCD backlighting in small TVs and industrial displays. It delivers up to 60mA per string across 8 parallel channels, supports true 12-bit (4095:1) phase-shifted PWM dimming at 120Hz, and features ±3% current accuracy, string open/short fault detection, and I²C/SMBus (1MHz) programmability.
For engineers reviewing the MSL3088-IU datasheet, MSL3088-IU pinout, MSL3088-IU application, or MSL3088-IU equivalent, key selection considerations include its dual-input PWM/SYNC interface for independent frequency/duty control, integrated Efficiency Optimizer for dynamic VLED regulation, and 24-pin VQFN package optimized for EMI reduction via automatic string phasing.
Technical Context
The MSL3088-IU implements a current-mode boost regulator controller with external MOSFET drive (GATE), cycle-by-cycle current limiting (CS input, 100mV threshold), and feedback regulation via FB (2.5V reference). Its eight matched current sinks (STR0–STR7) operate with ≤0.5V headroom and support automatic phase shifting to reduce input ripple and EMI.
Unlike the MSL3086, the MSL3088-IU separates dimming control: SYNC sets PWM frequency (20Hz–50kHz), while PWM pin controls duty cycle (0–100%). Internal registers accessible via I²C allow optional software-controlled dimming, fault reporting, and short-circuit threshold configuration - eliminating need for external logic in standalone applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED strings | 8 independent current sinks (STR0–STR7), each sinking up to 60mA peak |
| Dimming resolution | 4095:1 (12-bit) via phase-shifted PWM, synchronized to LCD refresh or external SYNC signal |
| Current accuracy | ±3% matching between strings; set by single ILED resistor (RILED) |
| Boost controller | External MOSFET drive (GATE), 569–762kHz switching frequency, 2.5V FB reference |
| I²C interface | 1MHz SMBus-compatible serial interface for register access, fault readback, and dimming control |
| Fault protection | Detects and latches string open/short, boost over-voltage, and die over-temperature (>135°C) |
| Operating range | −40°C to +85°C ambient; 4.5V–5.5V VIN/PVIN supply; up to 40V VSTR tolerance |
Pinout & Package
MSL3088-IU is housed in a 24-pin, 4mm × 4mm × 0.75mm lead-free, halogen-free, RoHS-compliant VQFN package with exposed thermal paddle (EP).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| STR0–STR7 | LED string current sink outputs | Cathode connections for up to 8 LED strings; each regulates current to 60mA with ≤0.5V headroom |
| PWM | PWM dimming duty cycle input | Accepts 20Hz–50kHz signal (0–100% duty); sets brightness when SYNC defines frequency |
| SYNC | PWM synchronization frequency input | Separate 20Hz–50kHz input defining dimming frequency - enables independent control vs. MSL3086 |
| ILED | Full-scale current programming input | Resistor-to-GND sets all string currents; 100kΩ yields 60mA typical (±3% matching) |
| GATE | External MOSFET gate driver output | Drives high-side N-channel switch in boost stage; supports >1A peak current |
| FB | Boost output voltage feedback | Connects to resistive divider from VLED; regulates to 2.5V reference for stable output |
| CS | Boost current sense input | Monitors external sense resistor; triggers cycle-by-cycle limit at 100mV threshold |
| FLTB | Open-drain fault output | Sinks current on fault (latched except boost OV); cleared by toggling EN or I²C command |
| SDA/SCL | I²C bidirectional data/clock | 1MHz interface for reading faults, configuring dimming, and adjusting short-circuit thresholds |
| EN | Enable input | Active-high logic input; powers up device and resets latched faults when toggled |
Key Features
| Feature | Design Value |
|---|---|
| Phase-shifted PWM dimming | Reduces input supply ripple and system-level EMI by staggering turn-on of 8 LED strings |
| Efficiency Optimizer (EO) | Dynamically adjusts VLED to minimum required level per string, minimizing power loss in current sinks |
| Auto-handling fault detection | Identifies and latches string open/short, boost over-voltage, and die over-temperature without MCU intervention |
| Independent SYNC/PWM control | Enables precise timing alignment with LCD panel refresh while decoupling brightness (duty) from flicker (frequency) |
| Single-resistor current setting | Eliminates per-string calibration; achieves ±3% inter-string current match using one ILED resistor |
Applications
| Small LCD TV Backlighting | Industrial Panel Display Lighting |
|---|---|
|
Use Scenario: Driving 8 parallel white LED strings behind a 10–24 inch LCD panel with variable brightness and low EMI requirements. IC Role / Device Role / Timing Role: LED current sink + boost controller; provides synchronized, phase-shifted PWM dimming aligned to panel refresh rate via SYNC input. Use Value: Enables flicker-free 12-bit dimming while reducing conducted emissions by >15dB through automatic string phasing. |
Use Scenario: Backlighting ruggedized HMI displays in factory automation equipment operating continuously at −40°C to +85°C. IC Role / Device Role / Timing Role: Standalone LED driver with auto-fault handling; operates without host MCU using EN-triggered reset and FLTB status monitoring. Use Value: Eliminates need for external supervision circuitry - detects and latches string opens/shorts, then signals via FLTB for maintenance alert. |
| Automotive Infotainment Displays | Medical Diagnostic Monitor Lighting |
|
Use Scenario: Powering LED backlights in automotive center-stack displays requiring AEC-Q200-aligned reliability and EMC robustness. IC Role / Device Role / Timing Role: High-accuracy current regulator with ±3% matching; uses I²C to log fault history and adjust short-circuit thresholds per vehicle calibration. Use Value: Supports ASIL-B–aligned diagnostics via register-accessible fault flags and temperature telemetry, reducing BOM count vs. discrete solutions. |
Use Scenario: Illuminating high-contrast grayscale medical imaging panels where consistent luminance and zero flicker are critical for diagnosis. IC Role / Device Role / Timing Role: Precision LED driver with 4095:1 dimming resolution; synchronizes PWM to frame rate via SYNC to eliminate visible scanning artifacts. Use Value: Delivers clinically acceptable grayscale fidelity (ΔE < 2) across full brightness range due to stable current regulation and phase-shifted drive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSL3086-IU | Single PWM input (no SYNC); shares same 8×60mA current sinks, boost controller, and I²C interface | Better suited for cost-sensitive monitor designs where dimming frequency is fixed or derived from internal oscillator | Select MSL3086-IU when external frequency synchronization is unnecessary and PCB layout simplicity is prioritized |
| MSL3041-IU | 4-string version with SYNC/PWM inputs; identical dimming architecture but half the channel count and higher per-string current (120mA) | Targeted at smaller displays (e.g., 7–12 inch) with fewer LEDs or higher-brightness requirements per string | Choose MSL3041-IU when display size or optical design reduces required string count and increases per-string current demand |
Compared with MSL3086-IU and MSL3041-IU, the MSL3088-IU uniquely balances 8-string scalability with independent dimming control - making it optimal for mid-size LCDs needing both high channel count and precise timing alignment without added microcontroller overhead.
Availability
MSL3088-IU is available at Aetrix Electronics and suitable for small LCD TV backlighting, industrial HMI displays, automotive infotainment systems, and medical diagnostic monitors requiring stable component supply and long-term production continuity.
Supply support for MSL3088-IU 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
Microchip Technology acquired Atmel in 2016 and maintains full technical support, manufacturing, and documentation for the MSL3088-IU family.
The MSL3088-IU belongs to Microchip's high-integration LED driver product line, engineered specifically for energy-efficient, low-EMI LCD backlighting in space-constrained consumer and industrial displays.
FAQ
What is the maximum number of LED strings the MSL3088-IU can drive simultaneously?
The MSL3088-IU drives up to 8 independent LED strings concurrently, with each STR0–STR7 output capable of sinking up to 60mA peak current. All strings share a common current-setting resistor (ILED), ensuring ±3% matching across channels. The device supports up to 10 series white LEDs per string at typical forward voltages, enabling configurations up to ~40V total string voltage.
How does the MSL3088-IU differ from the MSL3086-IU in terms of PWM control?
The MSL3088-IU features two dedicated inputs - PWM for duty cycle and SYNC for frequency - enabling independent adjustment of brightness and flicker characteristics. In contrast, the MSL3086-IU uses a single PWM input to define both parameters. This separation allows the MSL3088-IU to lock dimming frequency precisely to LCD panel refresh rates while varying brightness dynamically, a key advantage in small-TV and medical display applications.
Does the MSL3088-IU require an external microcontroller to operate?
No - the MSL3088-IU supports fully autonomous operation using only external passive components and control signals. With EN high, PWM and SYNC inputs active, and proper ILED/FB/CS resistor networks configured, it delivers regulated LED current and handles faults (open/short strings, over-temperature) without firmware. An MCU is optional and used only for advanced features like I²C-based diagnostics or dynamic threshold adjustment.
What thermal management provisions does the MSL3088-IU include?
The MSL3088-IU uses a 4mm × 4mm VQFN package with an exposed die-attach paddle (EP) that serves as the primary thermal path. EP must be soldered to a large copper ground plane and connected to CGND, PGND, and system ground. Thermal resistance is θJA = 29°C/W (4-layer board), supporting 1850mW continuous dissipation. Die over-temperature shutdown activates at 135°C with 10°C hysteresis, protecting the MSL3088-IU under sustained overload.
Can the MSL3088-IU drive LED strings with different forward voltages?
Yes - the MSL3088-IU's integrated boost controller dynamically adjusts VLED to meet the highest-string requirement, while the Efficiency Optimizer minimizes excess headroom for other strings. Each STRx output regulates current independently, so strings with mismatched VF (e.g., due to binning or aging) remain balanced within ±3%. However, all strings share the same VLED rail, so total string voltage must stay within the 40V absolute maximum rating of STR pins.
MSL3088-IU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- DC DC Controller
- Topology:
- Flyback, SEPIC, Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 40V
- Current - Output / Channel:
- 60mA
- Frequency:
- 665kHz
- Dimming:
- PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-VQFN (4x4)
MSL3088-IU FAQ
1.How can I place an order for MSL3088-IU through Aetrix?
Please submit a Request for Quotation (RFQ) for MSL3088-IU 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 MSL3088-IU reliable?
The price and inventory of MSL3088-IU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSL3088-IU is usually 5 days.
3.What payment methods are accepted for MSL3088-IU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSL3088-IU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSL3088-IU?
MSL3088-IU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSL3088-IU 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 MSL3088-IU?
For technical support, including MSL3088-IU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSL3088-IU requirements.
6.How does Aetrix verify that MSL3088-IU is sourced from the original manufacturer or authorized distributors?
All MSL3088-IU 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 MSL3088-IU meets industry standards.
7.What is the process for return or replacement of MSL3088-IU?
All MSL3088-IU units undergo pre-shipment inspection (PSI). If there is an issue with MSL3088-IU, 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 MSL3088-IU part is unused and in its original packaging.
Return procedure for MSL3088-IU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSL3088-IU Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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