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Monolithic Power Systems Inc. MP3314GC-Z
- Part No.:
- MP3314GC-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 20-UFBGA, CSPBGA
- Datasheet:
-
MP3314GC-Z.pdf
- Description:
- 6-CHANNEL, 60MA, 50V, BOOST WLED
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
MP3314GC-Z from Monolithic Power Systems is a 6-channel, 60mA/channel boost white LED driver with integrated 50V/150mΩ low-side MOSFET, I²C interface, and PWM/analog/mix dimming control. It regulates up to 43V output for driving 6 independent WLED strings in LCD backlighting systems, achieving ±2% LED current accuracy at 20mA and supporting phase-shifted channel operation to reduce EMI in tablet and notebook displays.
For engineers reviewing the MP3314GC-Z datasheet, MP3314GC-Z pinout, MP3314GC-Z application, or MP3314GC-Z equivalent, key selection criteria include its 3–30V input range, configurable 312/625/1250kHz switching frequency, 187.5mV LED regulation voltage, OTP memory for default register settings, and dual protection architecture (LED open/short, OVP, OCP, thermal shutdown) in CSP-20 packaging.
Technical Context
The MP3314GC-Z implements peak current mode control with adaptive VOUT regulation-dynamically adjusting output voltage based on the lowest active LED string voltage (VLEDx_MIN) and programmable headroom thresholds (HEADR[2:0], CPHYST[1:0]). Its internal 20MHz clock enables high-resolution dimming, while auto-selected fSW optimizes efficiency across load conditions by comparing brightness code MSBs against HILED/LILED thresholds.
It integrates six matched current sources with 1.5% matching (QFN) or 3% (CSP), I²C-configurable dimming modes (analog/PWM/mix), frequency spread spectrum (FSS) with 1/10 fSW jitter range, and digital dithering to extend effective dimming resolution. The device supports external PWM input (75Hz–25kHz), I²C register-based brightness control, and one-time programmable (OTP) memory for persistent configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 30V - supports wide-input industrial and portable power rails without external pre-regulation. |
| Max Output Voltage | 43V - sufficient to drive up to 10-series white LEDs (≈4V each) per channel under worst-case forward voltage variation. | LED Current Accuracy | ±2% at 20mA - ensures consistent luminance across display zones and minimizes visual banding in backlight uniformity-critical applications. |
| Switching Frequency | Selectable 312/625/1250kHz - higher frequencies enable smaller inductors and reduced EMI filtering footprint; auto-selection improves light-load efficiency. |
| I²C Interface Speed | 10–1000kHz - compatible with standard-mode and fast-mode controllers; supports real-time dimming updates and fault status polling during operation. |
| Thermal Shutdown | 150°C with 20°C hysteresis - prevents permanent damage during transient overloads or poor PCB thermal design while enabling safe recovery. |
| Package | CSP-20 (2.4mm × 1.74mm) - ultra-compact footprint ideal for space-constrained mobile display modules with minimal board area impact. |
Pinout & Package
The MP3314GC-Z is housed in a 20-pin Chip-Scale Package (CSP-20) measuring 2.4mm × 1.74mm with an exposed thermal pad connected to GND. This package delivers superior thermal performance (θJA = 50°C/W) and high-density mounting for thin-profile LCD backlight modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 (A1, B1) | SW | Drain of integrated 50V/150mΩ low-side MOSFET - connects to boost inductor and power diode anode; requires low-inductance layout for EMI control. |
| 3, 4 (A2, B2) | PGND | Power ground return for high-current switching path - must be routed separately from signal GND and tied to exposed pad for thermal and noise integrity. |
| 5 (A3) | SDA | I²C bidirectional data line - requires pull-up resistor (typically 2.2kΩ to VCC); supports multi-device bus sharing with address configuration. |
| 6 (A4) | SCL | I²C clock input - synchronized with master controller; timing compliant with standard-mode (100kHz) and fast-mode (400kHz) specifications. |
| 7 (B4) | EN | Enable control with 1.2V logic-high threshold - RC filter recommended for noise immunity; asserts soft-start sequence upon activation. |
| 8 | FF | Open-drain fault flag - pulled low during LED open/short, OVP, OCP, or thermal events; enables system-level fault logging and graceful shutdown. |
| 9 (B3) | PWM | External PWM brightness control input - accepts 75Hz–25kHz signals; low-state >70ms triggers standby mode to reduce quiescent current. |
| 10, 11, 15, 24 (D3, D4, C4, E3) | GND | Signal ground reference for analog and digital blocks - must be star-connected to PGND at single point near exposed pad to avoid ground bounce. |
| 12–18 (E4, D4, C4, E3, E2, E1) | LED1–LED6 | Current-sink outputs for individual WLED strings - each provides precise, matched current up to 60mA; cathodes connect directly to these pins. |
| 19 (D1) | VCC | 5V LDO output - powers internal logic and gate driver; requires 1μF ceramic capacitor placed within 2mm for stable operation. |
| 20 (C2) | VOUT | Output voltage sense node - connects to boost diode cathode; used for adaptive regulation and over-voltage protection monitoring. |
| 21 (C3) | FSET | Switching and PWM frequency setting - resistor-to-GND configures fSW/fPWM; disabled via I²C for register-based frequency selection. |
| 22 (C1) | VIN | Main input supply - accepts 3–30V; requires local 10μF low-ESR ceramic capacitor for ripple suppression and transient response. |
| 23 (D2) | ISET | LED current reference - external resistor sets full-scale current (e.g., 60kΩ → 20mA); enables precise calibration across temperature and unit variance. |
Key Features
| Feature | Design Value |
|---|---|
| Phase-shift function | Staggered channel switching reduces peak input current and conducted EMI by distributing switching harmonics across time domain. |
| Configurable slew rate | SRSW[1:0] controls MOSFET gate drive strength - weaker drive lowers dv/dt and radiated emissions but increases conduction loss. |
| Digital dithering | 3-bit dither extends effective dimming resolution beyond native 12-bit ILED[11:0] register, improving low-brightness smoothness. |
| OTP memory | Stores default I²C register values (e.g., dimming mode, fSW, protection thresholds) - eliminates boot-time configuration overhead in production firmware. |
| Adaptive VOUT regulation | Headroom optimization algorithm tracks minimum VLEDx and adjusts VOUT in discrete steps - maximizes efficiency while maintaining regulation margin. |
Applications
| Tablet Backlighting | Notebook Display |
|---|---|
Use Scenario: Driving 6 parallel WLED strings behind 10.1-inch IPS LCD panel with dynamic dimming for battery life extension. IC Role / Device Role / Timing Role: Primary boost LED driver with I²C-configured mix dimming (25% transfer point) and phase-shifted channel timing to suppress audible coil whine. Use Value: Enables >10,000:1 contrast ratio via precise 12-bit current control and eliminates visible PWM flicker through dither-enhanced low-duty smoothing. | Use Scenario: Compact 13.3-inch FHD display module requiring minimal PCB area and thermal dissipation in clamshell form factor. IC Role / Device Role / Timing Role: Integrated WLED controller with CSP-20 package and adaptive VOUT regulation - dynamically scales output voltage to match LED forward voltage drift over temperature. Use Value: Reduces total solution size by 35% vs. QFN-24 alternative and maintains ±2% luminance uniformity across -20°C to +70°C operating range. |
| Small-Size LCD Displays | Industrial Human-Machine Interface |
Use Scenario: 7-inch medical-grade display with stringent EMI compliance (CISPR-32 Class B) and zero-flicker requirements. IC Role / Device Role / Timing Role: EMI-optimized LED driver using FSS (1/10 fSW jitter), configurable slew rate, and phase-shifted channels to meet radiated emission limits. Use Value: Achieves 15dB lower peak emissions at 1250kHz fundamental versus fixed-frequency competitors, eliminating need for ferrite beads or shielding cans. | Use Scenario: Ruggedized 5.7-inch HMI panel deployed in factory automation with extended temperature cycling and vibration exposure. IC Role / Device Role / Timing Role: Fault-resilient backlight controller with comprehensive protection suite (LED open/short, OVP, OCP, thermal) and FF pin reporting. Use Value: Prevents catastrophic failure during LED string degradation; enables predictive maintenance via I²C-read fault history registers and FF pin state logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 6-channel WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP3314GR-Z | Same die, QFN-24 (4mm×4mm) package with θJA = 42°C/W - 19% lower thermal resistance than CSP-20. | Better suited for thermally constrained designs where PCB copper area allows larger footprint and higher power dissipation. | Select when thermal margin is critical and board space permits 4×4mm package; retains identical register map and feature set. |
| RT9397BF | 6-channel, 50mA/channel, no I²C interface - uses analog/PWM-only control; lacks OTP, FSS, and phase-shift functions. | Limited to basic dimming applications without dynamic headroom optimization or EMI reduction features. | Choose only if I²C configuration is unnecessary and cost sensitivity outweighs advanced functionality and efficiency gains. |
Compared with MP3314GR-Z, the MP3314GC-Z trades 8% higher thermal resistance for 42% smaller footprint and improved high-frequency EMI performance due to shorter bond wires; versus RT9397BF, it adds I²C configurability, adaptive regulation, and integrated fault diagnostics at modest BOM cost increase.
Availability
MP3314GC-Z is available at Aetrix Electronics and suitable for tablet backlighting, notebook display modules, and small-size LCD applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MP3314GC-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 two decades of expertise in DC/DC converters, LED drivers, and motor drivers.
The MP3314 product line targets compact, high-efficiency LCD backlight solutions for portable and industrial displays, emphasizing integration (6-channel current sinks, I²C, OTP), EMI mitigation (FSS, phase shift, slew control), and robust protection for field-reliable operation.
FAQ
What is the maximum number of LEDs per string that MP3314GC-Z can drive?
The MP3314GC-Z supports up to 43V output voltage. Assuming typical white LED forward voltage of 3.0–3.6V per diode at 20mA, it can reliably drive 10–14 LEDs in series per channel. At 25°C and 20mA, 10 LEDs (3.4V avg.) require 34V - well within the 43V limit and leaving 9V headroom for regulation margin and temperature drift.
Does MP3314GC-Z support both hardware PWM and I²C-based dimming simultaneously?
Yes - the MP3314GC-Z supports mixed-mode dimming (BRTM[1:0] = 11b), where external PWM input modulates internally generated PWM[15:0] duty cycle. This enables fine-grained brightness control: e.g., 10-bit external PWM combined with 16-bit internal register yields >26-bit effective resolution for flicker-free low-light operation.
How does the adaptive VOUT regulation improve efficiency compared to fixed-output designs?
Adaptive regulation continuously monitors the lowest active LED string voltage (VLEDx_MIN) and adjusts VOUT in discrete steps to maintain optimal headroom (e.g., 187.5mV at 20mA). This avoids excessive voltage overhead - reducing power loss in the current sinks and boosting converter - resulting in up to 8% higher system efficiency at partial brightness versus fixed-VOUT alternatives.
What protection features are implemented in hardware versus firmware?
All core protections - LED open/short, over-voltage (OVP), over-current (OCP), thermal shutdown, and inductor/diode short detection - are implemented in analog hardware with dedicated comparators and latches. The FF pin reflects these faults immediately (<1μs latency), independent of I²C communication or register access, ensuring fail-safe behavior even during firmware hangs or bus errors.
Can the MP3314GC-Z operate without an external I²C controller?
Yes - the MP3314GC-Z supports standalone operation using external PWM input and resistor-programmed settings (FSET, ISET). Default register values stored in OTP memory configure dimming mode, fSW, and protection thresholds at power-up, enabling full functionality without host processor intervention in simple applications.
What is the significance of the 187.5mV LED regulation voltage specification?
The 187.5mV value is the reference voltage used by the internal current-sense amplifier to regulate LED current. With a 20mA target, this corresponds to a 9.375Ω sense resistor (V = I × R). It defines the precision of current matching and accuracy - tighter tolerance on this reference enables ±2% ILED accuracy and <3% inter-channel mismatch at 20mA, critical for display uniformity.
MP3314GC-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 20-UFBGA, CSPBGA
- 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):
- 3V
- Voltage - Supply (Max):
- 30V
- Voltage - Output:
- 43V
- Current - Output / Channel:
- 60mA
- Frequency:
- 312kHz, 625kHz, 1.25MHz
- Dimming:
- Analog, I2C, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-CSP (2.45x1.7)
MP3314GC-Z FAQ
1.How can I place an order for MP3314GC-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3314GC-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 MP3314GC-Z reliable?
The price and inventory of MP3314GC-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3314GC-Z is usually 5 days.
3.What payment methods are accepted for MP3314GC-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3314GC-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3314GC-Z?
MP3314GC-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3314GC-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 MP3314GC-Z?
For technical support, including MP3314GC-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3314GC-Z requirements.
6.How does Aetrix verify that MP3314GC-Z is sourced from the original manufacturer or authorized distributors?
All MP3314GC-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 MP3314GC-Z meets industry standards.
7.What is the process for return or replacement of MP3314GC-Z?
All MP3314GC-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3314GC-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 MP3314GC-Z part is unused and in its original packaging.
Return procedure for MP3314GC-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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