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Monolithic Power Systems Inc. MP3371GR-0000-P
- Part No.:
- MP3371GR-0000-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MP3371GR-0000-P.pdf
- Description:
- IC LED DRIVER REG PWM 50MA 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
MP3371GR-0000-P from Monolithic Power Systems is an 8-channel synchronous boost WLED driver IC for LCD backlighting in tablets and notebooks. It delivers up to 50mA per channel, supports 3V–30V input, integrates I²C programmable dimming (14-bit PWM, 10-bit analog, mix modes), and features 50V output capability with 470mV LED regulation voltage at 20mA.
For engineers reviewing the MP3371GR-0000-P datasheet, MP3371GR-0000-P pinout, MP3371GR-0000-P application, or MP3371GR-0000-P equivalent, key selection criteria include channel count, I²C-configurable dimming resolution, synchronous FET on-resistance (155mΩ/235mΩ), thermal shutdown threshold (150°C), and LED short/open protection thresholds (2.5V–10V / 24V–45V).
Technical Context
The MP3371GR-0000-P implements peak current-mode control in a synchronous boost topology with integrated high-side and low-side MOSFETs (RDS(on) = 235mΩ/155mΩ). It uses an internal 10MHz clock to support high-resolution dimming and employs automatic VFB selection from the lowest active LEDx voltage to regulate output voltage precisely.
Its I²C interface (up to 1.2MHz SCL) configures all operational parameters-including switching frequency (350kHz–2.4MHz), full-scale current (0–50mA in 0.196mA steps), dimming mode, transfer points (6.25%–50%), and protection thresholds-enabling dynamic adaptation to varying LED string configurations and brightness requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 8 independent current sources, each configurable 0–50mA for parallel WLED strings |
| Input Voltage Range | 3V to 30V - supports wide-input industrial and battery-powered displays |
| Max Output Voltage | 50V - sufficient for driving up to 13-series white LEDs per string |
| LED Regulation Voltage | 470mV at 20mA - minimizes headroom loss and improves system efficiency |
| Current Matching | ±2.5% - ensures uniform brightness across all 8 channels without external calibration |
| Switching Frequency | Selectable 350kHz–2.4MHz - balances EMI, inductor size, and efficiency |
| I²C Interface Speed | Up to 1.2MHz - enables fast configuration updates during dynamic backlight control |
| Thermal Shutdown | 150°C with 20°C hysteresis - protects against sustained overloads in compact PCB layouts |
Pinout & Package
MP3371GR-0000-P is housed in a thermally enhanced QFN-24 (4mm × 4mm) package with exposed pad tied to PGND. The 24-pin layout supports full I²C control, 8 LED current outputs, synchronous boost operation (SW/BST/OUT), and comprehensive fault signaling (FT).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | Internal 5V LDO output | Powers gate driver and logic; requires local 1µF ceramic decoupling |
| 2 EN | Enable input | Active-high enable; <1µA shutdown current when pulled low |
| 3 SDA | I²C data line | Open-drain, supports standard/fast-mode I²C up to 1.2MHz |
| 4 SCL | I²C clock line | Input-only, 1.3V logic high threshold, 160ns setup/hold timing |
| 5 PWM | External dimming signal input | Accepts 0–100% duty cycle PWM; 550kΩ internal pull-down |
| 6 COMP | Error amplifier compensation node | Connect RC network to GND for loop stability across load/transient conditions |
| 7 A1 | I²C address select | Internally pulled high; sets second I²C address (0x33 or 0x32) |
| 8–15 LED1–LED8 | Constant-current LED sinks | Each drives one WLED string; unused pins must be tied to GND |
| 16 PGND | Power ground | High-current return path for LED strings and boost converter |
| 18 OUT | Boost output node | Connects to LED anodes; monitored for OVP and short-string detection |
| 20 SW | Switching node | Drives external inductor; rated –0.3V to +55V; 1µA leakage max |
| 21 BST | Bootstrap supply for HS-FET | Requires 100nF ceramic + 20Ω series resistor to SW for gate drive |
| 23 FT | Fault transistor gate driver | Pulled low during normal operation to enable external PMOS input disconnect |
| 24 VIN | Main power input | 3V–30V supply; requires local 10µF ceramic capacitor for ripple suppression |
| EP | Exposed thermal pad | Must be soldered to solid PGND plane for θJA = 46°C/W thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel synchronous boost architecture | Integrates 155mΩ LS-FET and 235mΩ HS-FET - eliminates external diode, reduces BOM cost and footprint |
| I²C-programmable dimming | Supports analog (10-bit), PWM (14-bit), and mixed dimming with selectable transfer points - enables seamless fade-in/out and high-contrast display control |
| Linear current ramp control | Adjustable step-slope (2µs–128µs) - ensures flicker-free transitions during brightness changes |
| Comprehensive fault protection | Detects LED open/short, overvoltage (24V–45V), overcurrent (1.8A–2.5A), OTP (150°C), and inductor/diode shorts - prevents system damage under fault conditions |
| Cascade power-sharing capability | Enables multiple MP3371 units to share a single boost stage - scales current capacity beyond 50mA/channel while maintaining synchronization |
| Low-headroom LED regulation | 470mV VHD at 20mA - maximizes efficiency by minimizing voltage drop across current sources |
Applications
| Tablet Backlight System | Notebook Display Driver |
|---|---|
|
Use Scenario: Driving 8 parallel strings of 10–13-series white LEDs in a 10.1-inch tablet display with dynamic local dimming. IC Role / Device Role / Timing Role: Primary WLED current controller with I²C-configured per-string current and synchronized PWM dimming. Use Value: ±2.5% current matching ensures uniform luminance; 470mV headroom enables >90% system efficiency at 7V input. |
Use Scenario: High-brightness backlight for 14-inch notebook LCD with adaptive brightness control via ambient light sensor feedback. IC Role / Device Role / Timing Role: Constant-current LED driver with mixed dimming mode (25% transfer point) for smooth transition between analog and PWM regions. Use Value: 14-bit PWM resolution achieves 100:1 dimming ratio at 22.32kHz; cascade function allows dual-IC configuration for higher total current. |
| Automotive Infotainment Display | Industrial Panel PC Backlight |
|
Use Scenario: 7-inch automotive center-stack display operating across –40°C to +105°C ambient with ESD-hardened interface. IC Role / Device Role / Timing Role: Robust WLED driver with LED short/open protection and 2.5V–10V configurable short-detection thresholds. Use Value: Built-in 150°C thermal shutdown and ±2000V HBM ESD rating meet AEC-Q100 stress requirements for display modules. |
Use Scenario: Fanless industrial panel PC requiring silent operation and long-term reliability in factory environments. IC Role / Device Role / Timing Role: Synchronous boost LED driver with programmable 350kHz–1.2MHz switching frequency to avoid audible noise and EMI-sensitive bands. Use Value: QFN-24 (4mm×4mm) package with exposed pad enables conduction cooling; 3V–30V input accommodates 24V DC industrial rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT4801BZQW | 6-channel, 40V max output, no integrated HS-FET - requires external synchronous rectifier | Limited to ≤6 strings; lower integration increases BOM count and layout complexity | Choose when lower channel count suffices and external FET selection is preferred for thermal optimization |
| ISL97693IRTZ-T7A | 8-channel, 36V max output, analog-only dimming (no PWM/mix modes), 5% current matching | Lacks digital dimming flexibility; wider current mismatch impacts display uniformity | Choose only for cost-sensitive designs where 14-bit PWM dimming and tight matching are not required |
Compared with RT4801BZQW and ISL97693IRTZ-T7A, MP3371GR-0000-P provides superior integration (integrated 50V HS/LS FETs), tighter current matching (±2.5% vs. ±5%), and full I²C programmability of dimming modes - directly reducing design risk and validation time for high-end display systems.
Availability
MP3371GR-0000-P is available at Aetrix Electronics and suitable for tablet backlighting, notebook display drivers, automotive infotainment systems, and industrial panel PCs requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MP3371GR-0000-P 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, with expertise in DC/DC converters, LED drivers, and motor drivers for consumer, industrial, and automotive markets.
The MP3371 belongs to MPS's WLED backlight driver product line, engineered specifically for high-efficiency, multi-string LCD panel illumination with programmable digital control and robust fault protection.
FAQ
What is the maximum number of LEDs per string supported by MP3371GR-0000-P?
The MP3371GR-0000-P supports up to 13-series white LEDs per string, based on its 50V maximum output voltage and typical forward voltage of ~3.8V per LED at 20mA. This is confirmed in the Typical Application section (page 3) and validated by the 45V OVP threshold setting.
Does MP3371GR-0000-P require an external bootstrap capacitor?
Yes - a 100nF ceramic capacitor and 20Ω resistor in series must be connected between BST and SW pins to properly bias the internal high-side MOSFET gate driver. This configuration is explicitly specified in the PIN FUNCTIONS table (page 4) and Functional Block Diagram (page 11).
Can MP3371GR-0000-P operate without I²C configuration?
Yes - it powers up with default register values: 650kHz switching frequency, 50mA full-scale current, analog dimming mode, and 25% mix-dimming transfer point. However, I²C is required to change modes, set protection thresholds, or configure non-default parameters.
How does the MP3371GR-0000-P handle an open LED string during operation?
It detects open strings by monitoring LEDx pin voltage; if voltage drops below 80mV, the channel is marked off after OVP triggers at 45V. Remaining strings continue regulation using the highest active LEDx voltage as feedback, maintaining backlight functionality with graceful degradation.
What is the minimum recommended PWM dimming frequency for optimal deep-dimming performance?
The datasheet specifies that a PWM dimming frequency of 22.32kHz achieves a 100:1 dimming ratio in mix dimming mode. Lower frequencies (e.g., 200Hz) reduce the achievable ratio due to increased minimum on-time constraints and visible flicker risk.
Is the exposed thermal pad (EP) electrically connected internally?
No - the EP is internally connected only to PGND, as stated in the PACKAGE REFERENCE diagram (page 3) and PIN FUNCTIONS table (page 4). It must be soldered to a dedicated PGND copper pour for thermal and electrical integrity; floating or connecting to other nets violates the absolute maximum ratings.
Does MP3371GR-0000-P support synchronization between multiple ICs?
Yes - the SYNC bit in register control enables or disables internal synchronous rectification, and the cascade function (described on page 1) allows two or more MP3371 units to share a common boost stage and synchronize switching via external clock injection or daisy-chained FT signals.
MP3371GR-0000-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 30V
- Voltage - Output:
- 50V
- Current - Output / Channel:
- 50mA
- Frequency:
- 350kHz, 500kHz, 650kHz, 800kHz, 950kHz, 1.2MHz
- Dimming:
- Analog, I2C, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
MP3371GR-0000-P FAQ
1.How can I place an order for MP3371GR-0000-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3371GR-0000-P 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 MP3371GR-0000-P reliable?
The price and inventory of MP3371GR-0000-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3371GR-0000-P is usually 5 days.
3.What payment methods are accepted for MP3371GR-0000-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3371GR-0000-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3371GR-0000-P?
MP3371GR-0000-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3371GR-0000-P 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 MP3371GR-0000-P?
For technical support, including MP3371GR-0000-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3371GR-0000-P requirements.
6.How does Aetrix verify that MP3371GR-0000-P is sourced from the original manufacturer or authorized distributors?
All MP3371GR-0000-P 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 MP3371GR-0000-P meets industry standards.
7.What is the process for return or replacement of MP3371GR-0000-P?
All MP3371GR-0000-P units undergo pre-shipment inspection (PSI). If there is an issue with MP3371GR-0000-P, 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 MP3371GR-0000-P part is unused and in its original packaging.
Return procedure for MP3371GR-0000-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP3371GR-0000-P Tags
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BCR402RE6327HTSA1
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