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Monolithic Power Systems Inc. MP3351DQ-LF-Z
- Part No.:
- MP3351DQ-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
MP3351DQ-LF-Z.pdf
- Description:
- IC LED DRIVER RGLTR 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,362
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Product details
Overview
MP3351DQ-LF-Z from Monolithic Power Systems is a 60V, 2A integrated photo-flash charger IC with built-in IGBT driver for xenon flash circuits in portable imaging systems. It features a 200mΩ internal power switch, programmable peak current (300mA–2A via external resistor), ±3% charge voltage accuracy, and operates from 3–6V single/dual-cell Li+ batteries. Used in digital still cameras to rapidly charge flash capacitors to ~300V.
For engineers reviewing the MP3351DQ-LF-Z datasheet, MP3351DQ-LF-Z pinout, MP3351DQ-LF-Z application, or MP3351DQ-LF-Z equivalent, key selection criteria include peak current programming resolution, IGBT gate drive timing (45ns propagation delay), critical conduction mode (DCM) boundary control, and thermal shutdown at 150°C with 15°C hysteresis.
Technical Context
The MP3351DQ-LF-Z implements a fixed-frequency flyback controller operating up to 400kHz in critical conduction mode, using an internal 200mΩ 60V MOSFET switch and external transformer. Peak primary current is set by current sourced from the ISET pin, scaled 5×10⁴:1 into internal comparator threshold.
Its feedback loop monitors divided output voltage at FB (trip point 1.20V ±2%), while DCM detection uses a 25mV offset comparator to manage minimum off-time (400ns after VOUT >16V). The integrated IGBT driver supplies 4Ω pull-up/pull-down gate drive referenced to VIN, with 60ns rise/70ns fall times into 6500pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VSW Max | 60V - Enables lower-turn-ratio transformers, reducing leakage inductance losses in xenon flash flyback stages. |
| IPEAK Range | 0.3–2A - Programmable via external RSET; supports flexible flash energy tuning across camera platforms. |
| Charge Accuracy | ±3% - Achieved via external resistive divider and 1.20V FB reference, ensuring repeatable flash capacitor voltage targeting. |
| IGBT Drive Prop Delay | 45ns - Minimizes dead-time uncertainty between flash trigger and IGBT turn-on, critical for precise flash timing. |
| TON-MAX | 50–120µs - Prevents excessive current draw from weak battery sources during charging faults or low-VIN conditions. |
| Thermal Shutdown | 150°C / 15°C hysteresis - Protects internal switch and IGBT driver under sustained high-power flash cycling. |
| FSW Max | 400kHz - Balances transformer size reduction against switching loss in compact camera modules. |
Pinout & Package
MP3351DQ-LF-Z is housed in a thermally enhanced 16-pin QFN package (3mm × 3mm, 0.5mm pitch) with exposed power pad (PGND) for efficient heat dissipation in space-constrained camera modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 ISET | Peak current programming input | Sinks current proportional to programmed IPEAK; sets flyback primary current limit via external resistor to GND. |
| 2,4 GND | Analog ground reference | Provides low-noise return path for FB, RDYB, CHARGE logic; must tie directly to local analog ground plane. |
| 3,6 VIN | Main supply input | Accepts 3–6V Li+ battery input; requires ≥0.1µF ceramic bypass capacitor to GND for stability. |
| 5 IGBTOUT | IGBT gate drive output | Drives IGBT gate with 4Ω pull-up/pull-down; delivers fast edge control (60ns rise/70ns fall) into 6500pF load. |
| 7,8 PGND / Exposed Pad | Power ground return | Carries high-current switch return path; exposed pad must be soldered to PCB thermal pad for θJA = 50°C/W. |
| 9 CHARGE | Enable/control logic input | Active-high enables charging cycle; toggling restarts charge; low forces shutdown and disables all power delivery. |
| 12,13 SW | Internal switch drain node | Connects to transformer primary; switches up to 60V with 200mΩ RDS(on) to minimize conduction loss. |
| 14 IGBTIN | IGBT gate logic input | Accepts 0.6V/2.4V logic thresholds; controls IGBTOUT state synchronously with CHARGE command. |
| 15 RDYB | Open-drain ready indicator | Pulled low when FB reaches 1.20V, signaling flash capacitor charged to target voltage (e.g., 300V). |
| 16 FB | Voltage feedback input | Monitors scaled output voltage; internal 1.20V comparator triggers charge termination and RDYB assertion. |
Key Features
| Feature | Design Value |
|---|---|
| Critical Conduction Mode (DCM) Control | Uses 25mV DCM comparator offset to dynamically adjust minimum off-time (400ns → 20µs), enabling stable operation across full charge curve. |
| Integrated IGBT Driver | Delivers matched 4Ω pull-up/pull-down with <70ns transition times, eliminating need for discrete gate drivers in xenon flash circuits. |
| Programmable Peak Current | Set from 0.3A to 2A using single external resistor on ISET pin, enabling one IC to support multiple flash energy levels. |
| Thermal Protection with Hysteresis | Shuts down at 150°C and remains off until junction cools to 135°C, preventing thermal runaway during repeated flash bursts. |
| Low Quiescent Current | 50µA typical when FB = 1.3V and CHARGE = high, minimizing battery drain during standby in always-on camera modules. |
Applications
| Digital Still Cameras | Mobile Phones With Camera |
|---|---|
Use Scenario: Rapid charging of 100–470µF xenon flash capacitors to 300V within 2–4 seconds for high-intensity still capture. IC Role / Device Role / Timing Role: Primary flyback controller and IGBT gate driver; manages energy transfer, voltage regulation, and flash trigger timing. Use Value: Enables consistent flash brightness and minimal recharge latency using single/dual-cell Li+ battery without external power switches or drivers. | Use Scenario: Compact flash charging in ultra-thin smartphone modules where board area and thermal budget are constrained. IC Role / Device Role / Timing Role: Integrated charger + driver reduces BOM count and PCB footprint versus discrete solutions; RDYB signal synchronizes flash firing. Use Value: Eliminates two external components (MOSFET + gate driver), saving ≥3.5mm² layout area and simplifying EMI filtering. |
| Optical Film Cameras | PDAs With Camera |
Use Scenario: Reliable flash charging in legacy film cameras with mechanical shutter timing and variable battery voltage (3–6V). IC Role / Device Role / Timing Role: Regulates output voltage despite input sag; TON-MAX prevents brownout during flash burst. Use Value: Maintains ±3% charge accuracy across battery discharge curve, ensuring repeatable flash exposure regardless of cell aging. | Use Scenario: Flash support in handheld PDAs with limited battery capacity and intermittent usage patterns. IC Role / Device Role / Timing Role: Low 50µA quiescent current extends standby time; CHARGE pin enables software-controlled flash activation. Use Value: Reduces average system current by >90% versus always-on charge controllers, extending PDA runtime between charges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar photo-flash charger applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8620Y | 40V max SW voltage; no integrated IGBT driver; requires external MOSFET and gate driver. | Limited to ≤250V flash outputs; higher component count increases layout complexity and EMI risk. | Select when lower output voltage (<250V) and cost sensitivity outweigh integration benefits. |
| TPS65552A | 2.5A peak current; 30V max SW voltage; integrated boost converter (not flyback); no IGBT driver. | Designed for LED flash, not xenon; unsuitable for high-voltage capacitor charging above 30V. | Only viable for LED-based illumination; incompatible with xenon flash transformer topologies. |
Compared with MAX8620Y and TPS65552A, MP3351DQ-LF-Z uniquely combines 60V flyback switching, 2A programmable current, and integrated IGBT drive-enabling complete xenon flash power stage in one 3×3mm QFN, with no external high-voltage switches or drivers required.
Availability
MP3351DQ-LF-Z is available at Aetrix Electronics and suitable for digital still cameras, mobile phones with camera, and optical film cameras requiring stable component supply and long-term production continuity.
Supply support for MP3351DQ-LF-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 analog and power ICs, headquartered in Kirkland, WA, with global design and support operations.
The MP3351 belongs to MPS's photo-flash power management product line, engineered specifically for compact, high-efficiency xenon flash charging in battery-powered imaging devices with stringent size and thermal constraints.
FAQ
What is the maximum allowable input voltage for MP3351DQ-LF-Z?
The absolute maximum VIN to GND rating is 6V. Operation above this voltage risks permanent damage to internal circuitry. The recommended operating range is 3.0V to 6.0V, optimized for single- or dual-cell Li+ batteries. Input overvoltage protection is not integrated; external clamping or regulation is required if source exceeds 6V.
How is peak charge current programmed on the ISET pin?
Peak current is set by connecting an external resistor RSET from ISET (Pin 1) to GND. The relationship is IPEAK(A) = 50 / RSET(kΩ). For 2A, RSET = 24.9kΩ (1% tolerance). The ISET pin sinks current proportional to IPEAK, and its internal scaling ratio is fixed at 5×10⁴:1.
Does MP3351DQ-LF-Z support automatic recharging after flash discharge?
No. MP3351DQ-LF-Z does not auto-recharge. After RDYB asserts (indicating target voltage reached), the device stops switching and enters low-power ready state. Recharging requires a low-to-high toggle on the CHARGE pin. This allows host processor control over flash timing and energy management.
What is the purpose of the DCM comparator and how does it affect operation?
The DCM comparator detects zero-current crossing in the flyback transformer primary by comparing FB voltage to a 25mV offset. When active, it enforces a minimum off-time (20µs initially, reduced to 400ns after VOUT >16V) to maintain critical conduction mode, improving efficiency and reducing EMI across the full charging cycle.
Can MP3351DQ-LF-Z drive IGBTs other than those specified in the typical application?
Yes - the IGBT driver is designed for standard N-channel IGBTs with gate thresholds ≤2.4V and gate charge ≤100nC. It delivers 4Ω pull-up/pull-down into 6500pF load, supporting gate drive for common small-signal IGBTs used in xenon flash circuits. Gate resistor selection must ensure safe dV/dt and avoid shoot-through in half-bridge configurations.
Is the exposed thermal pad (Pin 7/8) electrically connected to GND or PGND?
The exposed pad is electrically connected to PGND (power ground), not analog GND. It must be soldered to a dedicated PGND copper pour on the PCB to ensure proper thermal dissipation (θJA = 50°C/W) and low-impedance return path for the 2A switch current. Connecting it to AGND creates ground loops and compromises noise performance.
MP3351DQ-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- DC DC Regulator
- Topology:
- Flyback
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 6V
- Voltage - Output:
- 60V
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- -
- Applications:
- Camera Flash
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN-3-EP
MP3351DQ-LF-Z FAQ
1.How can I place an order for MP3351DQ-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3351DQ-LF-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 MP3351DQ-LF-Z reliable?
The price and inventory of MP3351DQ-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3351DQ-LF-Z is usually 5 days.
3.What payment methods are accepted for MP3351DQ-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3351DQ-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3351DQ-LF-Z?
MP3351DQ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3351DQ-LF-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 MP3351DQ-LF-Z?
For technical support, including MP3351DQ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3351DQ-LF-Z requirements.
6.How does Aetrix verify that MP3351DQ-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP3351DQ-LF-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 MP3351DQ-LF-Z meets industry standards.
7.What is the process for return or replacement of MP3351DQ-LF-Z?
All MP3351DQ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3351DQ-LF-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 MP3351DQ-LF-Z part is unused and in its original packaging.
Return procedure for MP3351DQ-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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