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Monolithic Power Systems Inc. MP3310NGQ-Z
- Part No.:
- MP3310NGQ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP3310NGQ-Z.pdf
- Description:
- IC LED DRVR RGLTR PWM 1.3A 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,145
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Product details
Overview
MP3310NGQ-Z from Monolithic Power Systems is a monolithic step-up white LED driver IC with true PWM dimming, 47V output capability, 1.3A internal switch current limit, and adjustable 300kHz–1.2MHz switching frequency. It regulates LED current via external ISET resistor (e.g., 76.8mA at RISET = 60.4kΩ), supports up to 12-series/4-parallel WLED arrays, and integrates OVP, UVLO, thermal shutdown, and 0.3Ω internal MOSFET - deployed in LCD backlighting for handheld computers and digital still cameras.
For engineers reviewing the MP3310NGQ-Z datasheet, MP3310NGQ-Z pinout, MP3310NGQ-Z application, or MP3310NGQ-Z equivalent, key selection criteria include its 4.5–25V input range, 500mV LED current sense reference, 1.24V OVP threshold programming, and QFN-10 (3×3mm) thermal performance with exposed pad grounding.
Technical Context
The MP3310NGQ-Z employs fixed-frequency peak-current-mode control with internal 5V LDO (VCC) powering gate drive and logic. Its error amplifier compares LED current feedback against a precise 500mV reference, generating COMP voltage that modulates switch duty cycle to maintain regulation.
OVP is programmable via resistor divider on OVP pin (threshold = 1.24V), triggering shutdown when output exceeds set point; EN/DIM serves dual function - enabling device operation and accepting 200Hz–2kHz PWM signals for flicker-free brightness control without color shift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 25V - supports single-cell Li-ion to multi-cell battery or industrial 12/24V rails without pre-regulation. |
| Max Output Voltage | 47V - enables driving up to 12-series white LEDs (≈3.8V/V) with margin for forward voltage variation and ripple. |
| Internal Switch RDS(on) | 0.3Ω - reduces conduction loss in boost power stage, supporting >93% efficiency at typical loads. |
| LED Current Accuracy | ±3.5% (typ.) - ensured by 500mV reference and matched internal current-sense amplifier, critical for uniform backlight luminance. |
| Switching Frequency Range | 300kHz to 1.2MHz - adjustable via FSET resistor; higher frequencies allow smaller inductors/capacitors but increase switching loss. |
| OVP Threshold | 1.24V (typ.) - sets open-load protection trip point via external divider; hysteresis = 0.12V prevents chatter during recovery. |
| Thermal Shutdown | 150°C - internal sensor disables SW until junction cools, protecting silicon under sustained overload or poor PCB heatsinking. |
Pinout & Package
MP3310NGQ-Z is housed in a thermally enhanced 10-pin QFN package (3mm × 3mm, 0.5mm pitch) with exposed thermal pad on underside - must be soldered to solid GND plane for θJA = 50°C/W and reliable 2.5W power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OVP | OVP threshold programming input | Accepts resistor-divider voltage; triggers shutdown when ≥1.24V - sets max safe output voltage for open-string fault protection. |
| 2 ISET | LED current setting node | Connects to ground via RISET; sets total LED current per ILED = 4605V / RISET - defines brightness level and string current matching. |
| 3 COMP | Error amplifier output | Loop compensation node; connects RC network to GND - stabilizes current regulation loop across load/line/temp variations. |
| 4 LED | LED cathode return path | Open-drain dimming switch output; sinks regulated current into LED strings - requires ≤120mA total sink capacity. |
| 5 GND / Exposed Pad | Power and signal reference | Main ground return and thermal interface - exposed pad must be fully connected to PCB GND plane for thermal reliability. |
| 6 SW | Boost power switch drain | Drives external inductor/diode; switches 1.3A peak current at up to 47V - layout must minimize loop area to reduce EMI. |
| 7 EN/DIM | Enable + PWM dimming input | Active-high enable; accepts 200Hz–2kHz square wave for true PWM dimming - eliminates analog current scaling artifacts. |
| 8 VIN | Main power input | Bypassed locally with ceramic cap; supplies internal LDO and switch driver - must handle peak input current during boost operation. |
| 9 VCC | Internal 5V LDO output | Powers gate driver and control circuitry; sourced from VIN if >5.5V, else requires external 5V - bypass with ≥1µF ceramic cap. |
| 10 FSET | Frequency programming input | Resistor-to-GND sets fSW; 20kΩ–100kΩ yields 1.2MHz–300kHz - balances efficiency, size, and EMI for target application. |
Key Features
| Feature | Design Value |
|---|---|
| True PWM dimming | EN/DIM pin accepts 200Hz–2kHz square wave to directly chop LED current - preserves color temperature and avoids low-frequency flicker. |
| Adjustable OVP threshold | OVP pin accepts resistor divider to set shutdown voltage precisely - enables robust open-string protection without overdesigning output capacitor voltage rating. |
| Integrated 0.3Ω MOSFET | Eliminates external high-side switch and associated gate-drive complexity - reduces BOM count and PCB area in space-constrained displays. |
| Programmable switching frequency | FSET pin allows frequency tuning from 300kHz to 1.2MHz - optimizes inductor size vs. efficiency trade-off for specific input/output conditions. |
| Internal 5V LDO (VCC) | Provides stable gate drive and bias for internal circuits - simplifies power sequencing and removes need for external 5V rail in most designs. |
Applications
| Handheld Computers & PDAs | Digital Still Cameras |
|---|---|
|
Use Scenario: Backlighting compact TFT-LCDs (3.5–5 inch) powered from single-cell Li-ion (3.0–4.2V). IC Role / Device Role / Timing Role: Step-up LED driver regulating constant current to 2–4 parallel strings of 6–8 series white LEDs. Use Value: Delivers stable luminance across battery discharge curve using wide 4.5–25V input range and true PWM dimming for UI brightness adaptation. |
Use Scenario: Driving high-brightness flash LED arrays or rear-panel status indicators in DSLR/mirrorless camera bodies. IC Role / Device Role / Timing Role: High-efficiency boost converter supplying up to 47V/1.3A to charge-flash capacitors or drive indicator LEDs. Use Value: Internal 0.3Ω MOSFET and 93% peak efficiency minimize heat in sealed enclosures; thermal shutdown prevents damage during burst-mode operation. |
| LCD Panels (Small Format) | Digital Picture Frames |
|
Use Scenario: Edge-lit or direct-lit backlight for 7–10 inch industrial or consumer LCD panels operating from 12V DC input. IC Role / Device Role / Timing Role: Constant-current source controlling 3–4 parallel strings of 10–12 series white LEDs with programmable OVP. Use Value: Adjustable OVP (via OVP pin) protects against overvoltage during LED string failure; COMP pin enables loop stability across varying panel capacitance. |
Use Scenario: Energy-efficient backlight for 8–12 inch photo display frames powered from USB-C or wall adapter (5–12V). IC Role / Device Role / Timing Role: PWM-dimmable boost driver powering 2–3 parallel strings of 8–10 series white LEDs with low quiescent current (1µA shutdown). Use Value: 1µA shutdown current extends battery life in portable units; true PWM dimming ensures consistent white point across 0.1–100% brightness range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT9397BZSP | Fixed 1.2MHz fSW, no FSET adjustment; 40V max output; 1.2A switch current limit. | Lacks programmable OVP and true PWM dimming - uses analog dimming only; less flexible for open-string fault tolerance. | Choose RT9397BZSP only if fixed frequency and lower output voltage ceiling are acceptable, and analog dimming suffices. |
| LM3409MYX/NOPB | External MOSFET required; supports >60V output; adjustable current limit; no integrated LDO. | Requires external gate driver and bias supply - increases BOM and layout complexity; better suited for >47V or >1.3A needs. | Choose LM3409MYX/NOPB when output voltage exceeds 47V or when discrete FET optimization (e.g., GaN) is required. |
Compared with RT9397BZSP and LM3409MYX/NOPB, MP3310NGQ-Z uniquely combines programmable OVP, true PWM dimming, integrated 5V LDO, and 47V/1.3A capability in a 3×3mm QFN - offering lowest component count and highest integration for mid-power LCD backlighting.
Availability
MP3310NGQ-Z is available at Aetrix Electronics and suitable for LCD panels, digital picture frames, handheld computers and PDAs, and digital still cameras requiring stable component supply, full production traceability, and long-term lifecycle support.
Supply support for MP3310NGQ-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, including DC/DC converters, LED drivers, and motor drivers - headquartered in Kirkland, WA, with global design and support centers.
The MP3310N product line delivers highly integrated, thermally optimized boost LED drivers for compact, energy-efficient backlighting - designed specifically for space-constrained portable and display applications demanding precision current regulation and flicker-free dimming.
FAQ
What is the minimum input voltage required for MP3310NGQ-Z to start switching?
The MP3310NGQ-Z features under-voltage lockout (UVLO) with a rising threshold of 3.9V (typ.) and hysteresis of 450mV. It begins switching only after VIN rises above 3.9V and VCC reaches operational level; below 3.6V, the device remains in shutdown with 1µA quiescent current.
Can MP3310NGQ-Z drive more than 12 white LEDs in series?
No - the absolute maximum output voltage is rated at +47V, and typical white LED forward voltage is 3.0–3.8V. At 3.8V per LED, 12-series yields 45.6V, leaving only 1.4V margin for ripple and tolerance. Driving 13+ LEDs risks exceeding 47V under worst-case conditions and triggering OVP shutdown.
How is the LED current calculated from the ISET resistor value?
LED current is determined by ILED = 4605V / RISET, where RISET is in ohms and ILED is in amperes. For example, a 60.4kΩ resistor yields ILED ≈ 76.2mA. The ISET pin must never be left floating and requires a grounded resistor for stable regulation.
Is the exposed thermal pad on MP3310NGQ-Z electrically connected?
Yes - the exposed pad is internally connected to GND (Pin 5). It must be soldered to a dedicated PCB GND plane with multiple thermal vias to achieve specified θJA = 50°C/W and prevent thermal shutdown under continuous 2.5W dissipation.
What happens during an open LED string condition?
When an LED string opens, output voltage rises until the OVP pin voltage reaches 1.24V (set by external divider), causing the internal switch to turn off. After hysteresis (0.12V drop), the device automatically recovers and resumes regulation - preventing capacitor overvoltage and system damage.
Does MP3310NGQ-Z require external compensation components?
Yes - the COMP pin (Pin 3) requires an external RC network (e.g., 1nF capacitor + 10kΩ resistor to GND) to stabilize the current regulation loop. Compensation values depend on LED string capacitance, inductor value, and switching frequency - refer to Figure 1 and Layout Considerations section of datasheet.
Can VCC be powered externally if VIN is below 5.5V?
Yes - when VIN < 5.5V, the internal LDO cannot regulate VCC to 5V. In such cases, apply a clean 5V supply directly to the VCC pin (Pin 9), bypassed with ≥1µF ceramic capacitor, to power internal gate driver and control circuitry reliably.
MP3310NGQ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 25V
- Voltage - Output:
- 50V
- Current - Output / Channel:
- 1.3A (Switch)
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -20°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MP3310NGQ-Z FAQ
1.How can I place an order for MP3310NGQ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3310NGQ-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 MP3310NGQ-Z reliable?
The price and inventory of MP3310NGQ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3310NGQ-Z is usually 5 days.
3.What payment methods are accepted for MP3310NGQ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3310NGQ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3310NGQ-Z?
MP3310NGQ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3310NGQ-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 MP3310NGQ-Z?
For technical support, including MP3310NGQ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3310NGQ-Z requirements.
6.How does Aetrix verify that MP3310NGQ-Z is sourced from the original manufacturer or authorized distributors?
All MP3310NGQ-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 MP3310NGQ-Z meets industry standards.
7.What is the process for return or replacement of MP3310NGQ-Z?
All MP3310NGQ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3310NGQ-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 MP3310NGQ-Z part is unused and in its original packaging.
Return procedure for MP3310NGQ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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