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Monolithic Power Systems Inc. EVQ3369-R-00A
- Part No.:
- EVQ3369-R-00A
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Driver Evaluation Boards
- Package:
- Datasheet:
-
EVQ3369-R-00A.pdf
- Description:
- EVAL BOARD FOR MPQ3369
- Quantity:
- Payment:
- Shipping:
Inventory:4,220
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Product details
Overview
EVQ3369-R-00A from Monolithic Power Systems is a 6-channel boost white LED driver IC with I²C interface, peak-current-mode PWM control, 15000:1 PWM dimming ratio at ≤200Hz, ±2.5% inter-string current matching, and integrated 100mΩ/50V MOSFET - designed for LCD backlighting in tablets and notebooks.
For engineers reviewing the EVQ3369-R-00A datasheet, EVQ3369-R-00A pinout, EVQ3369-R-00A application, or EVQ3369-R-00A equivalent, key selection criteria include programmable switching frequency (up to 2.2MHz), phase-shifted multi-string PWM dimming, thermal foldback, and dual-package availability (QFN24/TSSOP28-EP) for EMI-sensitive display power designs.
Technical Context
The EVQ3369-R-00A implements a fixed-frequency peak-current-mode boost converter with six independent, cathode-connected current sinks. Each channel regulates LED current via external ISET resistor with 2.5% matching accuracy across strings and supports analog/PWM/mixed dimming modes selected via I²C or MIX/AD pin.
It integrates cycle-by-cycle overcurrent protection, programmable OVP and LED short thresholds, fault flag output (FF), and automatic LED current reduction above 85°C. Switching frequency is set by resistor, I²C register, or external clock sync input - enabling EMI optimization via frequency spread spectrum and phase-shifted channel timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V - supports wide-input industrial and automotive-grade DC supplies without pre-regulation. |
| Max Output Voltage | <50V - enables driving up to 12-series white LEDs per string at typical forward voltage (3.2V–3.6V). |
| LED Current per Channel | Up to 100mA - configurable via external ISET resistor; default 50mA/string in reference design. |
| PWM Dimming Ratio | 15000:1 at FPWM ≤200Hz - achieves deep black-level control in high-contrast displays. |
| Switching Frequency Range | 200kHz to 2.2MHz - adjustable for optimal efficiency/EMI trade-off; supports external sync and spread spectrum. |
| Current Matching Accuracy | ±2.5% between channels - ensures uniform brightness across 6 LED strings without per-channel calibration. |
| Thermal Foldback Threshold | 85°C - linearly reduces LED current above threshold to prevent thermal runaway during sustained operation. |
Pinout & Package
EVQ3369-R-00A is available in QFN24 (4mm × 4mm, 0.5mm pitch) and TSSOP28-EP packages. Pin functions are identical across both packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Boost converter input supply | Accepts 3.5–36V; powers internal circuitry and high-side switch. |
| SW | Switch node | Connects to boost inductor; high dv/dt node requiring careful layout and snubbing. |
| FB | Feedback input for boost regulation | Monitors output voltage via resistive divider to regulate VOUT <50V. |
| ISET | Current-setting reference input | Sets nominal LED current per channel via external resistor (e.g., 100Ω → 50mA). |
| EN | Enable control | Active-high logic input; disables all channels and enters ultra-low quiescent current mode. |
| PWM | Pulse-width modulation input | Directly controls dimming duty cycle; supports 100Hz–20kHz input for analog/mix/PWM modes. |
| SCL/SDA | I²C serial interface | Standard 100kHz/400kHz I²C bus for configuring dimming mode, OVP threshold, fault reporting. |
| FF | Fault flag output | Open-drain active-low signal indicating OCP, OVP, OTP, LED open/short, or inductor short. |
| MIX/AD | Dimming mode select | Hardware pin override: high = mix dimming, low = analog dimming; I²C can override this setting. |
| LED1–LED6 | LED string cathode outputs | Each drives one LED string sink; supports up to 100mA/channel with thermal derating. |
Key Features
| Feature | Design Value |
|---|---|
| Phase-shifted PWM dimming | Staggered channel timing eliminates beat-frequency noise and reduces input/output ripple current peaks. |
| Programmable LED short detection threshold | Configurable via I²C register to distinguish true short faults from transient inrush or layout parasitics. |
| Disconnect VOUT from VIN on shutdown | Internal switch isolates boost output when EN = low, preventing backfeed into LED strings. |
| Frequency spread spectrum (FSS) | Reduces EMI peak amplitude by modulating switching frequency ±100kHz around center value. |
| Cycle-by-cycle current limiting | Prevents MOSFET failure during startup, short-circuit, or inductor saturation events. |
Applications
| Tablet Backlighting | Notebook Display Panel |
|---|---|
|
Use Scenario: Driving 6 parallel strings of 12-series white LEDs in 10.1″–13.3″ LCD panels with dynamic contrast enhancement. IC Role / Device Role / Timing Role: Primary boost LED driver with I²C-configurable dimming mode and per-string current regulation. Use Value: 15000:1 dim ratio enables HDR-like local dimming simulation without additional hardware. |
Use Scenario: Powering slim-profile edge-lit backlight modules where thermal density and EMI must be minimized. IC Role / Device Role / Timing Role: High-efficiency, phase-shifted 6-channel current sink with integrated MOSFET and thermal foldback. Use Value: QFN24 package and FSS reduce PCB area and radiated emissions, easing EMC certification. |
| Automotive Infotainment Display | Industrial HMI Panel |
|
Use Scenario: Backlighting for 7″–10″ automotive-grade TFT displays operating across -40°C to +105°C ambient. IC Role / Device Role / Timing Role: Robust LED driver with OTP, OVP, LED open/short protection, and wide VIN range. Use Value: Programmable fault thresholds and FF pin enable fail-safe diagnostics compliant with ASIL-B requirements. |
Use Scenario: Long-life backlight solution for factory-floor HMIs exposed to vibration, dust, and temperature cycling. IC Role / Device Role / Timing Role: Industrial-grade boost WLED controller with lead-free/halogen-free packaging and 10-year lifecycle support. Use Value: Dual-package option (QFN24/TSSOP28-EP) allows layout flexibility for thermal or mechanical constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 6-channel boost WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ3369-AEC1 | Automotive-grade variant (AEC-Q100 Grade 1); identical electrical specs but qualified for -40°C to +125°C junction temp. | Required for automotive infotainment systems needing AEC-Q100 compliance; same pinout and register map. | Select when ASIL-B functional safety or extended temperature operation is mandatory. |
| RT9397BF | 6-channel boost WLED driver with 10000:1 dim ratio; no I²C interface - uses analog/PWM-only control and fixed 1.2MHz Fsw. | Lacks digital configuration and programmable protections; simpler BOM but less flexible in system integration. | Choose for cost-sensitive, non-I²C-based designs where dim ratio >10000:1 suffices and register-level fault reporting is unnecessary. |
Compared with MPQ3369-AEC1, EVQ3369-R-00A offers commercial-temperature qualification and evaluation board support; versus RT9397BF, it adds I²C configurability, phase shift, and programmable fault thresholds - critical for adaptive display systems.
Availability
EVQ3369-R-00A is available at Aetrix Electronics and suitable for tablet backlighting, notebook display panels, and industrial HMI applications requiring stable component supply, long-term lifecycle assurance, and full evaluation board access.
Supply support for EVQ3369-R-00A 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
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, including DC/DC converters, LED drivers, motor drivers, and battery management solutions.
The MPQ3369 product line targets high-brightness, multi-string LCD backlighting with emphasis on dimming fidelity, thermal robustness, and EMI control - specifically engineered for space-constrained portable and automotive displays.
FAQ
What is the function of the MIX/AD pin on EVQ3369-R-00A?
The MIX/AD pin selects dimming mode when not overridden by I²C: high = mix dimming (PWM + analog), low = analog dimming only. It provides hardware fallback for systems where I²C may be unavailable during boot or fault recovery, ensuring basic dimming functionality remains active.
Does EVQ3369-R-00A support synchronization to an external clock?
Yes - the EVQ3369-R-00A accepts an external clock signal on the SYNC pin to lock switching frequency. This enables precise EMI frequency placement, multi-phase interleaving with other converters, and deterministic timing for synchronized PWM dimming across multiple display zones.
How does the phase-shift function improve system performance?
Phase shifting staggers the PWM dimming timing across the six LED channels by fixed intervals (e.g., 60° per channel), reducing peak input current demand and minimizing beat-frequency artifacts in the visible spectrum - directly improving display uniformity and lowering conducted EMI.
What protection features are implemented in hardware versus firmware?
OCP, OVP, OTP, LED open/short, and inductor short protections are fully hardware-based with immediate response (<1µs). Fault reporting (FF pin assertion) and threshold programming (OVP, LED short) are configurable via I²C registers - enabling system-level adaptation without hardware change.
Can EVQ3369-R-00A drive more than 12 LEDs per string?
No - the maximum output voltage is specified as <50V, and typical white LED forward voltage is ≥3.2V. At 12 LEDs × 3.6V = 43.2V, headroom is marginal; exceeding 12 LEDs risks regulation loss or OVP triggering under temperature/voltage variation.
Is the EVQ3369-R-00A evaluation board RoHS-compliant?
Yes - the EVQ3369-R-00A evaluation board uses only RoHS-compliant, halogen-free, lead-free components per MPS green policy, including GRM and C1608 series MLCCs, WSCD24H Schottky diodes, and D104C-919AS-220M inductors.
What is the minimum PWM dimming frequency supported for 15000:1 ratio?
The 15000:1 dimming ratio is guaranteed only at PWM frequencies ≤200Hz. At higher frequencies (e.g., 20kHz), the effective ratio drops to 200:1 due to finite current-sink bandwidth and settling time limitations in analog dimming mode.
EVQ3369-R-00A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Current - Output / Channel:
- 50mA
- Outputs and Type:
- 6 Non-Isolated Outputs
- Voltage - Output:
- -
- Features:
- Dimmable
- Voltage - Input:
- 3.5V ~ 36V
- Contents:
- Board(s)
- Utilized IC / Part:
- MPQ3369
EVQ3369-R-00A FAQ
1.How can I place an order for EVQ3369-R-00A through Aetrix?
Please submit a Request for Quotation (RFQ) for EVQ3369-R-00A 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 EVQ3369-R-00A reliable?
The price and inventory of EVQ3369-R-00A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EVQ3369-R-00A is usually 5 days.
3.What payment methods are accepted for EVQ3369-R-00A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EVQ3369-R-00A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EVQ3369-R-00A?
EVQ3369-R-00A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EVQ3369-R-00A 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 EVQ3369-R-00A?
For technical support, including EVQ3369-R-00A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EVQ3369-R-00A requirements.
6.How does Aetrix verify that EVQ3369-R-00A is sourced from the original manufacturer or authorized distributors?
All EVQ3369-R-00A 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 EVQ3369-R-00A meets industry standards.
7.What is the process for return or replacement of EVQ3369-R-00A?
All EVQ3369-R-00A units undergo pre-shipment inspection (PSI). If there is an issue with EVQ3369-R-00A, 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 EVQ3369-R-00A part is unused and in its original packaging.
Return procedure for EVQ3369-R-00A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
EVQ3369-R-00A Tags
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