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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Monolithic Power Systems Inc. MP3204DJ-LF-Z

Name: MP3204DJ-LF-Z
Brand: Monolithic Power Systems Inc.
SKU: MP3204DJ-LF-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP3204DJ-LF-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: LED Drivers

Package:: SOT-23-6 Thin, TSOT-23-6

Datasheet:: MP3204DJ-LF-Z.pdf

Description:: IC LED DRVR RGLTR PWM TSOT23-6

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MP3204DJ-LF-Z from Monolithic Power Systems is a fixed-frequency (1.3 MHz) boost-type white LED driver IC designed to drive up to 5 series-connected white LEDs from a single-cell Li-ion battery (2.5 V to 6 V input). It features 104 mV feedback voltage, open-LED protection via OV pin (28 V threshold), and integrated MOSFET in TSOT23-6 package. Used in compact portable displays requiring high efficiency (up to 87%) and PWM/DC dimming.

For engineers reviewing the MP3204DJ-LF-Z datasheet, MP3204DJ-LF-Z pinout, MP3204DJ-LF-Z application, or MP3204DJ-LF-Z equivalent, key selection criteria include its 1.3 MHz switching frequency, 104 mV FB reference, 28 V open-load shutdown threshold, internal current limit (350 mA), and thermal shutdown at 160 °C - all critical for battery-powered LED backlighting design.

Technical Context

The MP3204DJ-LF-Z implements constant-frequency peak-current-mode control with a 1.3 MHz oscillator and built-in slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its error amplifier regulates LED current by comparing FB voltage against a precise 104 mV internal reference.

Open-circuit protection is implemented via dedicated OV pin monitoring output voltage; shutdown occurs at 28 V with automatic latch-off until power recycle. Soft-start ramps current limit over 120 µs (in 40 µs steps), limiting inrush and output overshoot during startup.

Key Specifications

Parameter	Value and Actual Design Meaning
Switching Frequency	1.3 MHz fixed - enables use of small external inductors (e.g., 22 µH) and ceramic capacitors, reducing board area.
Feedback Voltage	104 mV typ - minimizes I²R loss across sense resistor, improving efficiency especially at low LED currents.
Open-Load Shutdown	28 V on OV pin - protects system from overvoltage failure when LED string opens; latches off until power cycle.
Input Voltage Range	2.5 V to 6 V - supports single-cell Li-ion (3.0–4.2 V) and regulated 5 V rails without external LDO.
Current Limit	350 mA - sets maximum switch conduction current; limits power dissipation during short-circuit or overload.
Thermal Shutdown	160 °C - halts operation to prevent permanent damage under sustained overload or poor PCB thermal design.
Enable Threshold	1.0–1.35 V rising - allows direct connection to microcontroller GPIO or logic-level control with 90 mV hysteresis.

Pinout & Package

MP3204DJ-LF-Z is housed in a thermally enhanced TSOT23-6 package (2.9 mm × 1.6 mm × 0.85 mm), optimized for space-constrained portable applications. The package supports θ_JA = 220 °C/W on 1"² 1 oz copper.

Pin/Terminal	Circuit Role	Design Meaning
1 SW	Switch Node Output	Drain of internal N-channel MOSFET; connects to inductor and rectifier diode; swings from GND to ~25 V.
2 GND	Power & Signal Ground	Common return path for switch, feedback, enable, and OV circuits; must be low-impedance and adjacent to SW/GND loop.
3 FB	Current Sense Input	Regulates LED current by sensing voltage across external sense resistor; target = 104 mV.
4 EN	Enable Control Input	Active-high digital control; <1 µA bias current; requires pull-up or MCU drive; cannot float.
5 OV	Over-Voltage Monitor	Monitors LED string anode voltage; triggers shutdown if >28 V (open-LED condition).
6 IN	Input Supply	Connects to battery or DC source; requires local 1 µF ceramic bypass capacitor near pin.

Key Features

Feature	Design Value
Integrated Power MOSFET	Eliminates external high-side switch; reduces BOM count and layout complexity for boost LED drivers.
Soft-Start Function	120 µs controlled ramp of current limit prevents input inrush and output voltage overshoot at startup.
PWM & Analog Dimming Support	EN pin accepts ≤1 kHz PWM for digital dimming; FB pin accepts DC injection for analog dimming (0–20 mA range).
Low Quiescent Current	690 µA typical operating supply current - extends battery life in always-on display standby modes.
Full Protection Suite	Includes UVLO (2.45 V turn-on), thermal shutdown (160 °C), overcurrent, and open-LED detection.

Applications

Cell Phones

Digital Still Cameras

Use Scenario: Backlighting for 2.4"–3.2" OLED or TFT LCD panels in legacy smartphone designs.

IC Role / Device Role / Timing Role: Constant-current boost controller regulating 3–5 white LEDs in series from 3.6 V Li-ion battery.

Use Value: Delivers stable 20 mA LED current with <±3% regulation across battery discharge (3.0–4.2 V), enabling consistent brightness.

Use Scenario: Flash illumination and rear-panel LCD backlight in compact digital cameras.

IC Role / Device Role / Timing Role: High-efficiency LED driver supporting both steady-state display backlight and pulsed flash mode via EN pin control.

Use Value: 87% peak efficiency minimizes heat generation in sealed camera enclosures; soft-start avoids flash-trigger timing jitter.

Handheld PDAs

Small LCD Displays

Use Scenario: Monochrome or color STN/TFT display backlight in industrial handheld terminals and medical PDAs.

IC Role / Device Role / Timing Role: Single-chip solution providing regulated LED current and open-circuit fault detection for field-replaceable displays.

Use Value: OV pin monitoring ensures immediate shutdown upon LED failure-preventing overvoltage damage to display driver ICs.

Use Scenario: Front-lit or edge-lit character/graphic LCD modules in test equipment, POS terminals, and instrumentation.

IC Role / Device Role / Timing Role: Compact LED driver interfacing directly with microcontroller GPIOs for brightness control and status reporting.

Use Value: TSOT23-6 footprint fits within 5 mm × 5 mm board area; 1.3 MHz switching avoids audible noise in sensitive measurement environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar white LED driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
RT9397BZSP	Fixed 1.2 MHz frequency; 100 mV FB voltage; no dedicated OV pin - relies on overvoltage clamp at SW node.	Lacks explicit open-LED detection; requires external circuitry for reliable lamp-failure response.	Prefer MP3204DJ-LF-Z where guaranteed open-circuit shutdown is required per safety or reliability spec.
AP3012KTR-G1	1.0 MHz switching; 100 mV FB; includes soft-start but no thermal shutdown or OV protection.	Requires external thermal monitoring and OV sensing for full protection coverage.	MP3204DJ-LF-Z offers superior integration for space-constrained, fully protected designs.

Compared with RT9397BZSP and AP3012KTR-G1, MP3204DJ-LF-Z provides uniquely integrated open-LED protection (28 V OV threshold), thermal shutdown, and 104 mV low-dropout FB reference - delivering higher functional safety and reduced external component count in portable LED systems.

Availability

MP3204DJ-LF-Z is available at Aetrix Electronics and suitable for cell phones, digital still cameras, and handheld PDAs requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for MP3204DJ-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 core expertise in DC/DC conversion, LED drivers, and motor control solutions.

The MP3204 belongs to MPS's white LED driver product line, engineered specifically for ultra-compact, battery-powered visual interfaces demanding high efficiency, robust fault protection, and minimal external components.

FAQ

What is the minimum input voltage required for MP3204DJ-LF-Z to start switching?

The MP3204DJ-LF-Z incorporates under-voltage lockout (UVLO) with a rising threshold of 2.45 V and hysteresis of 92 mV. It begins switching only when the IN pin voltage exceeds 2.45 V, ensuring stable operation above the brownout point of most single-cell Li-ion batteries.

Can MP3204DJ-LF-Z drive more than 5 white LEDs?

No - the device is rated for up to 5 series white LEDs (typical forward voltage ~3.2 V each), resulting in a maximum output voltage of ~16 V. Its absolute maximum OV pin rating is 28 V, but efficiency and regulation degrade significantly beyond 5 LEDs due to increased duty cycle and internal switch losses.

How is LED current set, and what tolerance applies?

LED current is set by an external sense resistor (R_SENSE) between FB and GND: I_LED = 104 mV / R_SENSE. The FB voltage has ±10 mV tolerance (94–114 mV), so total current accuracy depends on both resistor tolerance and FB specification - typical error is ±12% with 1% R_SENSE.

Does MP3204DJ-LF-Z support analog dimming without external transistors?

Yes - analog dimming is supported by injecting current into the FB pin using a resistive divider from a DC control voltage (e.g., 0–2 V). As described in Figure 6 of the datasheet, this method directly modulates the feedback loop without requiring external active devices.

What is the recommended inductor value and type for optimal efficiency?

A 22 µH shielded power inductor with low DCR (<200 mΩ) is recommended. Shielded construction minimizes EMI; low DCR reduces conduction loss. Inductor saturation current must exceed 350 mA to avoid core saturation under peak-switch conditions.

Is the TSOT23-6 package lead-free and RoHS-compliant?

Yes - the "-LF" suffix in MP3204DJ-LF-Z explicitly denotes lead-free and RoHS-compliant packaging per EU Directive 2011/65/EU, verified through MPS's material declarations and third-party testing reports.

What happens during an open-LED event, and how is recovery handled?

When an LED opens, the OV pin detects >28 V and forces immediate shutdown. The device remains latched off - no switching occurs - until the input supply is cycled (power removed and reapplied). This prevents uncontrolled voltage rise and potential damage to downstream components.

MP3204DJ-LF-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: SOT-23-6 Thin, TSOT-23-6

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:: 21V

Current - Output / Channel:: 350mA (Switch)

Frequency:: 1.3MHz

Dimming:: Analog, PWM

Applications:: Backlight

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TSOT-23-6

MP3204DJ-LF-Z FAQ

1.How can I place an order for MP3204DJ-LF-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP3204DJ-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 MP3204DJ-LF-Z reliable?

The price and inventory of MP3204DJ-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 MP3204DJ-LF-Z is usually 5 days.

3.What payment methods are accepted for MP3204DJ-LF-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3204DJ-LF-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP3204DJ-LF-Z?

MP3204DJ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP3204DJ-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 MP3204DJ-LF-Z?

For technical support, including MP3204DJ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3204DJ-LF-Z requirements.

6.How does Aetrix verify that MP3204DJ-LF-Z is sourced from the original manufacturer or authorized distributors?

All MP3204DJ-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 MP3204DJ-LF-Z meets industry standards.

7.What is the process for return or replacement of MP3204DJ-LF-Z?

All MP3204DJ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3204DJ-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 MP3204DJ-LF-Z part is unused and in its original packaging.

Return procedure for MP3204DJ-LF-Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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