My Inquiry
My Account
Monolithic Power Systems Inc. MP3302DD-LF-Z
- Part No.:
- MP3302DD-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 8-TFDFN Exposed Pad
- Datasheet:
-
MP3302DD-LF-Z.pdf
- Description:
- IC LED DRVR RGLTR SGL WR 8QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,876
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP3302DD-LF-Z from Monolithic Power Systems is a 40V, 1.3A step-up white LED driver IC designed for single-cell Li-ion battery-powered LCD backlighting. It integrates a 0.5Ω internal MOSFET, regulates LED current via 200mV feedback voltage, operates at 1.3MHz fixed frequency, and supports single-wire analog/PWM dimming. Used in 5"–7" LCD panels with up to 10-series LED strings.
For engineers reviewing the MP3302DD-LF-Z datasheet, MP3302DD-LF-Z pinout, MP3302DD-LF-Z application, or MP3302DD-LF-Z equivalent, key selection criteria include open-load shutdown (42V threshold), 2.5–6V input range, thermal shutdown at 150°C, UVLO hysteresis of 92mV, and QFN8 (2mm × 3mm) package compatibility with high-density portable layouts.
Technical Context
The MP3302DD-LF-Z implements a constant-frequency peak-current-mode boost converter architecture with internal 1.3A switch and 200mV precision feedback reference. Its control loop uses a stabilizing ramp to suppress subharmonic oscillation above 50% duty cycle and regulates output current by comparing sensed resistor voltage against the 200mV reference.
Dimming is implemented through the EN pin: DC voltage (0.7–1.4V) enables analog dimming by scaling VFB linearly from 0–200mV; PWM signals (200Hz–1kHz, ≥1.5V amplitude) enable digital dimming. Open-circuit protection triggers shutdown when VSW exceeds 42V, preventing overvoltage damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6V - Supports single-cell Li-ion (3.3V–4.2V) with 0.5V headroom for dropout and ripple. |
| Switching Frequency | 1.3MHz (typ) - Enables use of small 4.7µH inductors and 0.47µF ceramic output capacitors. |
| Feedback Voltage | 200mV (typ) - Minimizes I²R loss across sense resistor, improving efficiency in high-current LED strings. |
| Current Limit | 1.33A (typ) - Limits peak inductor current to protect internal MOSFET during startup or overload. |
| Open-Load Threshold | 42V (typ) - Triggers automatic shutdown if LED string opens, preventing uncontrolled VOUT rise beyond safe level. |
| Thermal Shutdown | 150°C (typ) - Halts switching until junction cools, protecting die integrity under sustained high-power operation. |
| UVLO Threshold | 2.45V (rising) - Prevents erratic startup below minimum battery voltage; 92mV hysteresis avoids chatter near cutoff. |
Pinout & Package
MP3302DD-LF-Z is housed in an RoHS-compliant 8-pin QFN package (2mm × 3mm) with exposed thermal pad connected to GND. The compact footprint supports high-density PCB layouts in space-constrained handheld devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | GND / Exposed Pad | Primary ground return and thermal path; exposed pad must be soldered to solid GND plane for θJA = 80°C/W. |
| 2 | IN | Input power supply pin; requires local 10µF ceramic bypass capacitor to minimize high-frequency noise coupling. |
| 3 | NC | No-connect terminal; left floating per datasheet - no internal connection or function. |
| 4 | EN | Enable/dimming control input; accepts 0.6V ON / 0.4V OFF thresholds and 0.7–1.4V analog dimming range. |
| 6 | FB | Feedback input; senses voltage across external current-sense resistor to regulate LED current at 200mV. |
| 7 | SW | Switch node output; connects to inductor and Schottky diode anode; swings from GND to ≤36V. |
| 8 | GND | Dedicated signal ground pin - tied internally to pins 1 and 5, but routed separately for noise isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Single-wire dimming interface | EN pin supports both analog (DC voltage) and PWM (200Hz–1kHz) dimming without additional control lines. |
| Integrated 0.5Ω MOSFET | Eliminates need for external high-side switch, reducing BOM count and board area in portable backlight designs. |
| Open-load shutdown | Automatically disables switching when VSW > 42V, preventing destructive overvoltage during LED string failure. |
| Internal soft-start | Controls inrush current at startup, limiting VIN surge and minimizing output overshoot on cold start. |
| Thermal + UVLO + current limit protection | Three independent fault safeguards ensure robust operation across battery voltage sag, ambient temperature extremes, and load transients. |
Applications
| Handheld Computer Backlight | Digital Still Camera Display |
|---|---|
Use Scenario: Driving 9 parallel strings of 3-series white LEDs (27 total) from a 3.3–6V Li-ion source in a PDA. IC Role / Device Role / Timing Role: Step-up LED driver providing constant-current regulation and single-wire brightness control. Use Value: Achieves 87% efficiency at 180mA total output while maintaining <±3% current matching across strings using 200mV FB reference. | Use Scenario: Powering a 3×3 matrix of white LEDs for rear LCD preview screen in compact digital camera. IC Role / Device Role / Timing Role: Boost converter with integrated switch and analog dimming for seamless brightness adjustment during image review. Use Value: Enables flicker-free dimming down to 1% via EN pin DC voltage control, with no external DAC or PWM generator required. |
| 5"–7" LCD Panel Backlight | Small Industrial HMI Display |
Use Scenario: Supplying uniform backlighting for automotive-grade 6.5" TFT display operating from 4.2V nominal battery. IC Role / Device Role / Timing Role: High-voltage boost LED driver with open-circuit protection and thermal shutdown for safety-critical displays. Use Value: 42V open-load threshold prevents overvoltage failure if one LED string opens, ensuring system-level reliability without external supervision. | Use Scenario: Illuminating segmented OLED or monochrome LCD in factory-floor handheld terminals with wide-temp operation. IC Role / Device Role / Timing Role: LED current controller supporting –40°C to +85°C ambient and surviving repeated thermal cycling. Use Value: Guaranteed operation across full industrial temperature range with 150°C thermal shutdown and 92mV UVLO hysteresis preventing brownout restart oscillation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT9397BZSP | Fixed 1.2MHz frequency; 200mV FB; no integrated MOSFET - requires external 0.2Ω switch. | Lacks single-wire dimming - uses separate DIM pin and requires external PWM generator. | Choose when external MOSFET selection is needed for higher current or thermal partitioning. |
| LM3409QMYX/NOPB | Adjustable frequency (200kHz–2MHz); 210mV FB; external MOSFET; no integrated dimming control logic. | Requires external op-amp or microcontroller for analog dimming; lacks EN-based single-wire implementation. | Prefer when programmable frequency or higher output voltage (>40V) capability is required. |
Compared with RT9397BZSP and LM3409QMYX/NOPB, the MP3302DD-LF-Z uniquely integrates MOSFET, 200mV FB, and EN-based single-wire dimming in a 2mm × 3mm QFN, reducing component count and layout complexity for compact portable backlight systems.
Availability
MP3302DD-LF-Z is available at Aetrix Electronics and suitable for handheld computers, digital still cameras, and 5"–7" LCD panels requiring stable component supply, RoHS compliance, and production-ready lead times.
Supply support for MP3302DD-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, with design centers in the US, China, and Taiwan.
The MP3302 product line targets portable backlighting applications, delivering integrated boost LED drivers with minimal external components, high efficiency, and robust protection for battery-powered displays.
FAQ
What input voltage range does MP3302DD-LF-Z support?
The MP3302DD-LF-Z operates from 2.5V to 6V input, optimized for single-cell Li-ion batteries (3.3V–4.2V nominal). Its 2.45V UVLO rising threshold and 92mV hysteresis ensure clean startup and prevent oscillation during battery discharge near end-of-life.
How is LED current set and regulated?
LED current is set by an external sense resistor between FB and GND, using ILED = 200mV / RSENSE. The IC regulates the voltage across this resistor to 200mV (±15mV) via its internal error amplifier and current-mode control loop, achieving tight current accuracy across temperature and input voltage.
Can MP3302DD-LF-Z drive more than 10 series LEDs?
No - the datasheet specifies "drives up to 10 series white LEDs" based on its 40V absolute maximum SW pin rating and typical 36V operational limit. Driving >10 WLEDs (≈30–33V forward drop) risks exceeding safe SW voltage swing and triggering open-load shutdown at 42V.
What thermal performance can be expected in QFN8 package?
In the 2mm × 3mm QFN8 package with exposed pad soldered to a 1-in² 1oz copper GND plane, θJA is 80°C/W. At 1.3A switch current and 87% efficiency, power dissipation is ~180mW, resulting in ~14°C junction-to-ambient rise - well within the –40°C to +125°C operating range.
Does MP3302DD-LF-Z support PWM dimming above 1kHz?
Yes - high-frequency PWM dimming (>1kHz) is supported using an external RC filter on the EN pin, as shown in Figure 3 of the datasheet. A 20kΩ resistor and 100nF capacitor (cutoff ≈10× PWM frequency) converts PWM into a DC voltage that scales LED current linearly from 0–100%.
Is there a minimum recommended output capacitor value?
Yes - the datasheet specifies 0.47µF as sufficient for most applications. This value ensures stable loop response and limits output ripple under transient load conditions while remaining compatible with small 0603/0805 ceramic capacitors in portable designs.
What protection features are built into MP3302DD-LF-Z?
The IC includes under-voltage lockout (UVLO), internal 1.33A current limit, thermal shutdown at 150°C, and open-load shutdown at 42V. All protections are fully integrated and require no external components - they operate autonomously to prevent damage during fault conditions.
MP3302DD-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-TFDFN 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):
- 2.5V
- Voltage - Supply (Max):
- 6V
- Voltage - Output:
- 36V
- Current - Output / Channel:
- 1.33A (Switch)
- Frequency:
- 1.3MHz
- Dimming:
- Single-Wire
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-QFN (2x3)
MP3302DD-LF-Z FAQ
1.How can I place an order for MP3302DD-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3302DD-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 MP3302DD-LF-Z reliable?
The price and inventory of MP3302DD-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 MP3302DD-LF-Z is usually 5 days.
3.What payment methods are accepted for MP3302DD-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3302DD-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3302DD-LF-Z?
MP3302DD-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3302DD-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 MP3302DD-LF-Z?
For technical support, including MP3302DD-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3302DD-LF-Z requirements.
6.How does Aetrix verify that MP3302DD-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP3302DD-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 MP3302DD-LF-Z meets industry standards.
7.What is the process for return or replacement of MP3302DD-LF-Z?
All MP3302DD-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3302DD-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 MP3302DD-LF-Z part is unused and in its original packaging.
Return procedure for MP3302DD-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP3302DD-LF-Z Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
