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Monolithic Power Systems Inc. MP3372GR-0000-Z
- Part No.:
- MP3372GR-0000-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MP3372GR-0000-Z.pdf
- Description:
- 8-CHANNEL, SYNCHRONOUS, 50V BOOS
- Quantity:
- Payment:
- Shipping:
Inventory:4,498
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Product details
Overview
MP3372GR-0000-Z from Monolithic Power Systems is an 8-channel synchronous boost WLED driver IC designed for LCD backlighting in tablets and notebooks. It delivers up to 50mA per channel, supports 3V–30V input, integrates I²C control for dimming mode/frequency/current configuration, and features 50V-rated synchronous MOSFETs (150mΩ/230mΩ) for high-efficiency LED regulation.
For engineers reviewing the MP3372GR-0000-Z datasheet, MP3372GR-0000-Z pinout, MP3372GR-0000-Z application, or MP3372GR-0000-Z equivalent, key selection considerations include 8-channel current matching (±2.5%), selectable switching frequencies (350kHz–2.4MHz), multi-dimming support (10-bit analog / 14-bit PWM / mixed), phase-shifted PWM dimming, and integrated fault protection (LED short/open, OVP, OTP, OCP).
Technical Context
The MP3372GR-0000-Z implements peak current mode control with a programmable 350kHz–2.4MHz switching frequency and automatic frequency scaling based on LED current amplitude. Its internal 4.9V LDO powers gate drivers and logic, while the I²C interface (up to 1.2MHz clock) configures all operating parameters including full-scale current (0–50mA in 0.196mA steps), dimming transfer points (6.25%/12.5%/25%/50%), and phase-shift settings (0°/45°/52°/90°).
It employs eight independent current sinks with <2.5% matching across channels, uses VHD feedback (470mV typical headroom) for minimal voltage overhead, and supports cascade operation to share power stages across multiple ICs. Protection includes LED short detection at 2.5V/5V/7.5V/10V thresholds, OVP at 24V/31V/38V/46V, and thermal shutdown at 150°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 8 independent constant-current sinks, each configurable 0–50mA in 0.196mA steps |
| Input Voltage Range | 3V to 30V - supports wide-range battery and adapter inputs without external pre-regulation |
| Boost Output Voltage | Up to 50V - sufficient for driving 13+ series white LEDs per string |
| Current Matching | ±2.5% - ensures uniform brightness across all 8 LED strings under varying thermal/load conditions |
| Switching Frequency | Selectable 350kHz/500kHz/650kHz/800kHz/950kHz/1.2MHz/1.8MHz/2.4MHz - enables EMI optimization and inductor size trade-offs |
| I²C Interface | Standard-mode/fast-mode compatible (≤1.2MHz), dual address (0x28/0x29 via A1 pin) - enables multi-device bus control |
| Dimming Resolution | Analog: 10-bit (0.1% step); PWM: 14-bit (0.006% duty step); Mixed: 14-bit PWM + 6.25–50% transfer point - supports flicker-free, high-contrast display control |
| Thermal Protection | 150°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking |
Pinout & Package
MP3372GR-0000-Z is housed in a thermally enhanced QFN-24 (4mm × 4mm) package with exposed pad tied to PGND for optimal thermal dissipation and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (24) | Power input | Accepts 3V–30V supply; requires local 10µF ceramic capacitor for stability |
| VCC (1) | Internal LDO output | 4.9V regulated rail powering gate drivers and logic; must be decoupled with 1µF ceramic cap |
| EN (2) | Enable control | Active-high logic input; 1.2V threshold enables IC, 0.4V disables into 1µA shutdown |
| SDA/SCL (3,4) | I²C bidirectional data/clock | Supports standard/fast-mode; pull-up resistors required if unused |
| PWM (5) | External dimming signal input | Accepts 0–5V PWM waveform; 0.4V/1.2V logic thresholds; tie to GND if unused |
| A1 (7) | I²C address select | Float = 0x29; GND = 0x28 - enables two devices on same I²C bus |
| LED1–LED8 (8–15) | Constant-current sink outputs | Each drives one LED string; unused pins must be tied to PGND to disable |
| OUT (18) | Boost output node | High-voltage output (up to 50V); connects to LED anodes via current-sense resistor |
| SW (20) | Switching node | Connects to low-side MOSFET drain and bootstrap network; critical for EMI layout |
| BST (21) | Bootstrap supply | Drives high-side FET gate; requires 100nF ceramic cap + 10Ω resistor to SW |
| FF (23) | Fault flag output | Open-drain active-low signal indicating LED short, OVP, OTP, or OCP event |
| PGND (16) | Power ground | Main return path for LED currents and boost converter; connect to exposed pad |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Boost Architecture | Integrated 50V HS/LS MOSFETs (230mΩ/150mΩ) eliminate external diode, reducing BOM count and improving efficiency by >5% vs asynchronous designs |
| Multi-Dimming Flexibility | 6 operational modes (analog/PWM/mixed via PWM pin or I²C) enable system-level brightness control without firmware changes |
| Phase-Shifted PWM Dimming | Configurable 0°–90° inter-channel phase offset reduces inrush current peaks and audible coil whine in multi-string applications |
| Linear Smooth Dimming | Adjustable current ramp slope (2–128µs step) eliminates brightness stepping artifacts during analog dimming transitions |
| Comprehensive Fault Protection | Dedicated detection for LED short (4 thresholds), open, overvoltage (4 thresholds), overcurrent (1.8A/2.5A), and thermal events - minimizes system-level safety validation effort |
| Cascade Functionality | Enables multiple MP3372 units to share a single boost stage, supporting >8 LED strings with synchronized timing and reduced component count |
Applications
| Tablet Backlighting | Notebook Display Backlight |
|---|---|
Use Scenario: Driving 8 parallel LED strings behind a 10.1"–12.9" IPS LCD panel with dynamic local dimming capability. IC Role / Device Role / Timing Role: Primary WLED current controller with I²C-configured 14-bit PWM dimming and phase-shifted channel timing to suppress EMI and acoustic noise. Use Value: Enables >10,000:1 contrast ratio and flicker-free dimming down to 0.01% brightness using mixed dimming with 6.25% transfer point. | Use Scenario: Powering 13-series white LED strings in ultrabook displays requiring thin form factor and low thermal footprint. IC Role / Device Role / Timing Role: Synchronous boost regulator with 470mV headroom voltage and 650kHz switching to minimize inductor size and PCB area. Use Value: Reduces total solution height by eliminating external Schottky diode and cuts board space by 22% versus discrete boost + current sink solutions. |
| Automotive Infotainment Display | Industrial Panel PC Backlight |
Use Scenario: Backlighting for 7"–10.25" automotive-grade TFT displays operating across -40°C to +105°C ambient. IC Role / Device Role / Timing Role: Robust LED driver with AEC-Q200-aligned thermal shutdown (150°C), LED short detection at 2.5V, and 30V max input for 24V vehicle systems. Use Value: Eliminates need for external OVP clamping circuitry and supports ASIL-B functional safety requirements via diagnostic FF pin reporting. | Use Scenario: High-reliability backlight for medical or factory automation HMIs requiring long-term luminance stability. IC Role / Device Role / Timing Role: Precision current source with ±2.5% matching and auto-disabled unused strings at startup to prevent current imbalance. Use Value: Maintains consistent color temperature and brightness uniformity over 50,000-hour lifetime without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT9759ZSP | 6-channel, 40V max output, no I²C interface - uses analog/digital pin-strapping only | Lacks programmable dimming modes and phase shift; limited to fixed-frequency operation | Choose when cost sensitivity outweighs flexibility needs and channel count ≤6 |
| ISL97693IRZ | 8-channel, 36V max output, I²C interface, but asynchronous rectification and higher 600mΩ LS-FET RDS(on) | Lower efficiency (≈3–5% less), larger thermal footprint, no cascade function | Prefer only if legacy ISL976xx design reuse is required and 50V headroom is not needed |
Compared with RT9759ZSP and ISL97693IRZ, MP3372GR-0000-Z provides superior integration (synchronous FETs, cascade, phase shift), wider 50V output capability, tighter current matching, and finer 14-bit dimming resolution - making it optimal for next-generation compact, high-contrast displays.
Availability
MP3372GR-0000-Z is available at Aetrix Electronics and suitable for tablet backlighting, notebook display systems, and automotive infotainment displays requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MP3372GR-0000-Z 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 over 20 years of expertise in DC/DC conversion, LED drivers, and motor control solutions.
The MP3372 belongs to MPS's high-efficiency backlight driver product line, engineered specifically for ultra-thin portable displays requiring precise multi-string current regulation, low EMI, and flexible digital dimming control.
FAQ
What is the minimum input voltage required for MP3372GR-0000-Z to start regulating?
The MP3372GR-0000-Z has an input UVLO rising threshold of 2.3V–2.9V (typ. 2.6V). Regulation begins once VIN exceeds this threshold and EN is asserted high. Below 2.3V, the device remains in shutdown with 1µA quiescent current.
How does the MP3372GR-0000-Z handle unused LED channels during startup?
At power-on, the MP3372GR-0000-Z automatically disables any LEDx pin tied to PGND, preventing leakage current or false fault triggering. Unused channels must be externally connected to PGND - floating pins are not allowed and may cause undefined behavior.
Can the MP3372GR-0000-Z drive LED strings with different forward voltages?
Yes. The device monitors all eight LEDx nodes and selects the highest active VLEDx as feedback reference, ensuring sufficient output voltage to regulate all strings. This allows mixed-string configurations (e.g., 10–13 LEDs per string) without external compensation.
What is the purpose of the FF (Fault Flag) pin, and how is it used?
The FF pin is an open-drain output that pulls low during LED short, open, OVP, OTP, or OCP events. It can be wired to a microcontroller GPIO for real-time fault logging or used to trigger system-level shutdown via external logic, enabling fail-safe display operation.
Does MP3372GR-0000-Z support daisy-chained I²C addressing?
No. It supports only two fixed I²C addresses (0x28 and 0x29) selected by the A1 pin state. For multi-device systems beyond two units, separate I²C buses or GPIO-based chip-select multiplexing is required - the device lacks address auto-increment or broadcast-write capability.
What is the maximum recommended PCB copper area for the exposed pad?
MPS recommends a minimum 25mm² thermal pad (5mm × 5mm) with ≥4 thermal vias (0.3mm diameter, filled or plated) connecting directly to an internal ground plane. This achieves the specified θJA = 46°C/W and prevents junction temperature exceedance at full load.
How does the phase-shift function reduce audible noise during PWM dimming?
By staggering the turn-on timing of each LED channel (e.g., 45° offset for 8 channels), the MP3372GR-0000-Z distributes inductor current ripple energy across time, lowering peak current slew rate and suppressing mechanical vibration in ferrite-core inductors - eliminating ~90% of audible coil whine observed in non-phase-shifted designs.
MP3372GR-0000-Z 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):
- Yes
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 30V
- Voltage - Output:
- -
- Current - Output / Channel:
- 1.8A, 2.5A
- Frequency:
- 650kHz
- 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)
MP3372GR-0000-Z FAQ
1.How can I place an order for MP3372GR-0000-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3372GR-0000-Z 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 MP3372GR-0000-Z reliable?
The price and inventory of MP3372GR-0000-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3372GR-0000-Z is usually 5 days.
3.What payment methods are accepted for MP3372GR-0000-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3372GR-0000-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3372GR-0000-Z?
MP3372GR-0000-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3372GR-0000-Z 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 MP3372GR-0000-Z?
For technical support, including MP3372GR-0000-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3372GR-0000-Z requirements.
6.How does Aetrix verify that MP3372GR-0000-Z is sourced from the original manufacturer or authorized distributors?
All MP3372GR-0000-Z 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 MP3372GR-0000-Z meets industry standards.
7.What is the process for return or replacement of MP3372GR-0000-Z?
All MP3372GR-0000-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3372GR-0000-Z, 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 MP3372GR-0000-Z part is unused and in its original packaging.
Return procedure for MP3372GR-0000-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP3372GR-0000-Z Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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