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Monolithic Power Systems Inc. MP3361DK-LF
- Part No.:
- MP3361DK-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Specialized ICs
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MP3361DK-LF.pdf
- Description:
- IC XENON PHOTO FLSH CHRGR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,244
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Product details
Overview
MP3361DK-LF from Monolithic Power Systems is a 300V, 1A peak integrated photo-flash charger and IGBT driver for xenon flash systems in digital still cameras. It integrates a 60V/0.5Ω power switch, achieves ±3% output voltage accuracy via internal 300:1 feedback divider, and charges to 300V from 4.2V battery in ≤4 seconds. Its RDYB open-drain flag signals charge completion.
For engineers reviewing the MP3361DK-LF datasheet, MP3361DK-LF pinout, MP3361DK-LF application, or MP3361DK-LF equivalent, key selection criteria include peak charge current (1.0–1.2A), FB trip voltage (295V typ), shutdown current (<1µA), IGBTOUT drive strength (5Ω pull-up / 6Ω pull-down), and MSOP-10 thermal performance (θJA = 150°C/W).
Technical Context
The MP3361 operates in critical conduction mode with fixed 20µs TOFF below 20V output to limit inrush, then transitions to boundary-mode operation for faster charging above 20V. Internal 1.2V reference and 300:1 resistive divider set precise 300V charge threshold at FB pin.
It integrates dual-function circuitry: a flyback controller with current-mode regulation and overcurrent protection (ILIM), plus a dedicated IGBT gate driver with 1µs pulse width, 50ns propagation delay, and 130ns/180ns rise/fall times into 6800pF load. CHG pin enables/disables both functions synchronously.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.5V to 6V - supports single-cell Li-ion (3.0–4.2V) and regulated 3.3V/5V rails |
| Output Voltage Accuracy | ±3% - achieved via internal 300:1 FB divider and 1.2V reference, eliminating external resistor network |
| Peak Charge Current | 1.0–1.2A - enables rapid energy transfer to flash capacitor with minimal transformer size |
| Shutdown Current | <1µA - preserves battery life during standby in portable camera systems |
| IGBTOUT Drive Strength | 5Ω pull-up / 6Ω pull-down - delivers fast, low-loss gate switching for 400V-class IGBTs like FGR15N40A |
| RDYB Output | Open-drain, logic-low active - directly interfaces with microcontroller GPIO without level-shifting |
| Thermal Resistance θJA | 150°C/W - requires minimal PCB copper area for thermal management in compact DSC modules |
Pinout & Package
MP3361DK-LF is housed in a 3×3mm MSOP-10 package with exposed pad for thermal enhancement. Pin 1 is identified by half-circle marking per JEDEC MO-817 BA variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RDYB | Open-drain status output | Pulled low when FB ≥295V - provides direct system-level flash-ready signal |
| 2 SW | Switch node | Drain of internal 60V/0.5Ω MOSFET - connects to primary winding of flyback transformer |
| 3 IGBTOUT | IGBT gate driver output | Push-pull output capable of sourcing/sinking >100mA - drives gate capacitance of discrete IGBT |
| 4 IGBTIN | IGBT enable input | CMOS-compatible logic input - high = enable IGBT firing after charge completion |
| 5,9 N/C | No connect | Unbonded pins - must be left floating or tied to GND per layout guidelines |
| 6 VIN | Power supply input | Input for internal bias and gate drive - requires ≥0.1µF ceramic bypass to GND |
| 7 GND | Ground reference | Analog and power ground - shared return for charger and IGBT driver circuits |
| 8 CHG | Enable control input | Active-high logic input - high = start charge cycle, low = immediate shutdown |
| 10 FB | Feedback input | High-voltage sense node - internally divided 300:1 from flash capacitor positive terminal |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 60V/0.5Ω power switch | Reduces transformer turns ratio and leakage inductance losses - lowers EMI and improves efficiency vs. external switch solutions |
| Internal 300:1 feedback divider | Eliminates external HV resistors - improves voltage accuracy stability and reduces BOM count and board space |
| Programmable IGBT pulse width | Fixed 1µs gate drive pulse - ensures consistent xenon tube ionization without over-stressing IGBT or flash capacitor |
| Critical conduction + boundary mode control | Optimizes charge time across full voltage range - 20µs fixed TOFF at low VOUT prevents inrush; boundary mode accelerates high-VOUT charging |
| Thermal shutdown with 15°C hysteresis | Protects die under sustained overload or poor heatsinking - auto-recovery after cooldown avoids system lockup |
Applications
| Digital Still Cameras (DSC) | Optical Film Cameras |
|---|---|
Use Scenario: Compact DSLR or mirrorless camera requiring bright, repeatable xenon flash for low-light photography. IC Role / Device Role / Timing Role: Primary flash charger and IGBT trigger controller - manages energy transfer, voltage regulation, and synchronized flash discharge. Use Value: Enables 300V flash capacitor charging in ≤4 seconds from single Li-ion cell while maintaining ±3% voltage accuracy for consistent light output. | Use Scenario: Retro-style film camera with electronic flash module replacing mechanical flash sync. IC Role / Device Role / Timing Role: High-voltage charge manager and IGBT gate driver - replaces discrete oscillator/transformer/driver combinations. Use Value: Reduces component count by integrating charger, feedback, and driver - simplifies optical alignment and improves reliability over aging mechanical contacts. |
| PDA with Xenon Flash | Industrial Inspection Flash Units |
Use Scenario: Legacy PDA with integrated camera needing burst-capable flash for barcode scanning or document capture. IC Role / Device Role / Timing Role: Dual-function analog power IC - performs DC-DC conversion and high-voltage switching control in ultra-thin form factor. Use Value: Delivers 1A peak current in 3×3mm MSOP-10 package - meets strict height constraints (<0.95mm) while supporting rapid recharge cycles. | Use Scenario: Machine vision system requiring precisely timed, high-intensity flash pulses for high-speed object inspection. IC Role / Device Role / Timing Role: Precision timing and energy delivery controller - coordinates flash charge completion (RDYB) with image sensor exposure window. Use Value: 50ns IGBTIN-to-IGBTOUT propagation delay and 1µs pulse width ensure sub-microsecond flash timing accuracy - critical for motion-blur-free imaging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar photo-flash charger and IGBT driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8630Y | Lacks integrated IGBT driver; requires external gate driver and separate HV feedback network | Better suited for LED flash systems; not designed for xenon tube triggering | Select when LED-based illumination is preferred over xenon for lower power and longer lifetime |
| LT3494 | Higher 400V output capability but no integrated IGBT driver; uses external sense resistor for current limiting | Targeted at industrial strobe lighting with longer flash duration requirements | Select when >300V output or programmable current limit is required, and IGBT driver can be added externally |
Compared with MAX8630Y and LT3494, MP3361DK-LF uniquely integrates both precision 300V charging and IGBT drive in one MSOP-10 package - reducing system BOM, PCB area, and timing skew between charge completion and flash trigger.
Availability
MP3361DK-LF is available at Aetrix Electronics and suitable for digital still cameras, optical film cameras, PDAs with xenon flash, and industrial inspection flash units requiring stable component supply and RoHS-compliant packaging.
Supply support for MP3361DK-LF 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, with design centers in the US, China, and Taiwan.
The MP3361 belongs to MPS's photo-flash power management product line, engineered specifically for compact, battery-powered xenon flash systems demanding high integration, tight voltage accuracy, and reliable IGBT triggering.
FAQ
What is the maximum recommended flash capacitor value for MP3361DK-LF?
The MP3361DK-LF is optimized for 100–220µF flash capacitors. Larger values increase charge time beyond the 4-second specification and may exceed peak current limits during initial inrush. The internal 1A peak current limit and 70µs maximum TON timer protect against overstress, but design margin is best preserved within the 100–220µF range specified in typical applications.
Can MP3361DK-LF operate from a 3.3V supply instead of 4.2V?
Yes - MP3361DK-LF supports VIN from 2.5V to 6V, including regulated 3.3V supplies. At 3.3V input, charge time to 300V increases to approximately 5.2 seconds due to reduced energy transfer per switching cycle, but all protections (UVLO, thermal shutdown, max TON) remain fully functional.
How does the RDYB pin interface with a microcontroller?
RDYB is an open-drain output referenced to GND. It requires an external pull-up resistor (typically 10kΩ to 3.3V or 5V) to generate a logic-high signal when inactive. When FB reaches 295V, RDYB pulls low, providing a clean, debounced interrupt source for MCU GPIO without additional conditioning circuitry.
Is the internal 300:1 feedback divider adjustable?
No - the 300:1 resistive divider is laser-trimmed and permanently integrated. It sets a fixed 300V charge threshold (1.2V × 300) at the FB pin. For different output voltages, external resistor dividers must be used with alternative controllers such as LT3494 or MAX8630Y.
What is the purpose of the N/C pins (5 and 9) in MSOP-10 layout?
Pins 5 and 9 are unconnected and unbonded. They must be left floating - do not tie to GND or VIN. Their presence maintains mechanical symmetry and thermal balance in the MSOP-10 package; grounding them may cause unpredictable thermal or electrical behavior per MPS layout guidelines.
Does MP3361DK-LF support automatic recharging after flash discharge?
No - MP3361DK-LF requires external logic to re-enable charging. After RDYB goes low and flash fires, the part remains in shutdown until CHG is toggled high again. This allows host MCU full control over flash timing, preventing unintended recharge during sensor readout or image processing windows.
MP3361DK-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Type:
- Xenon Photo Flash Charger
- Applications:
- Digital Still Cameras, Optical Film Cameras, PDAs
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
- Grade:
- -
- Qualification:
- -
MP3361DK-LF FAQ
1.How can I place an order for MP3361DK-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3361DK-LF 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 MP3361DK-LF reliable?
The price and inventory of MP3361DK-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3361DK-LF is usually 5 days.
3.What payment methods are accepted for MP3361DK-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3361DK-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3361DK-LF?
MP3361DK-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3361DK-LF 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 MP3361DK-LF?
For technical support, including MP3361DK-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3361DK-LF requirements.
6.How does Aetrix verify that MP3361DK-LF is sourced from the original manufacturer or authorized distributors?
All MP3361DK-LF 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 MP3361DK-LF meets industry standards.
7.What is the process for return or replacement of MP3361DK-LF?
All MP3361DK-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP3361DK-LF, 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 MP3361DK-LF part is unused and in its original packaging.
Return procedure for MP3361DK-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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