My Inquiry
My Account
Monolithic Power Systems Inc. MP1528DK-LF-P
- Part No.:
- MP1528DK-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MP1528DK-LF-P.pdf
- Description:
- IC LED DRV RGLTR PWM 950MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,611
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP1528DK-LF-P from Monolithic Power Systems is a precision white LED driver IC designed to drive up to nine series-connected white LEDs from a single-cell Li-ion battery (2.7V–36V BIAS input). It integrates a 0.63Ω power MOSFET, regulates LED current via 0.4V full-scale FB threshold, supports analog/PWM brightness control, and includes open-load shutdown triggered at 40V on BIAS. Used in compact portable displays requiring stable current regulation.
For engineers reviewing the MP1528DK-LF-P datasheet, MP1528DK-LF-P pinout, MP1528DK-LF-P application, or MP1528DK-LF-P equivalent, this page delivers verified electrical parameters, MSOP-8 package mapping, functional block context, real-world brightness control behavior, and validated alternative drivers for multi-LED portable lighting designs.
Technical Context
The MP1528DK-LF-P implements a constant off-time, current-limited, variable-frequency boost converter architecture. Its feedback loop regulates LED current by comparing FB voltage against a 0.4V threshold derived from BRT input (attenuated 1:3), enabling precise analog dimming from 0.27V–1.2V or PWM dimming at 100–400Hz.
Open-circuit protection is implemented via BIAS pin monitoring: when output voltage exceeds 40V, the device shuts down until EN is cycled. Internal thermal shutdown activates at 160°C, and under-voltage lockout engages below 2.1V on BIAS with 100mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Drive Capability | Up to 9 series white LEDs, supporting ≥36V output with 20mA max per string. |
| FB Regulation Threshold | 0.40V ±20mV - sets LED current via external sense resistor (e.g., 20Ω → 20mA). |
| Integrated Power Switch RON | 0.63Ω - minimizes conduction loss in boost switch path at high current. |
| BRT Input Range (Analog) | 0.27V–1.2V - linearly controls LED current; 1.2V yields full-scale 20mA output. |
| Open-Load Shutdown Threshold | 40V on BIAS pin - disables switching if LED string opens, preventing overvoltage damage. |
| UVLO Threshold | 2.65V rising, with 100mV hysteresis - ensures reliable startup only above minimum BIAS supply. |
| Thermal Shutdown | 160°C junction temperature - protects die during sustained overload or poor PCB thermal design. |
Pinout & Package
MP1528DK-LF-P is packaged in an 8-pin MSOP (3mm × 3mm body, 0.65mm pitch) with exposed thermal pad on underside. Pin 1 is marked by a dot or beveled corner; pins are numbered counterclockwise.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | FB | Feedback input referenced to GND; connects to bottom of LED string/sense resistor to regulate current at 0.4V. |
| 2 | GND | Power and signal ground reference; must be low-impedance connection to minimize noise coupling into FB. |
| 3 | SW | Drain of internal 0.63Ω MOSFET; connects to inductor and Schottky rectifier; swings from GND to ≥42V. |
| 4 | BIAS | Internal bias supply and open-circuit monitor; connect to top of LED string for 40V fault detection. |
| 5 | EN | Enable control: logic-high (>1.2V) enables operation; <0.4V disables with 1µA shutdown current. |
| 6 | BRT | Brightness control: analog DC (0.27–1.2V) or PWM (100–400Hz, low <0.18V, high >1.2V). |
| 7, 8 | NC | No-connect pins; must remain unconnected per datasheet layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 0.63Ω MOSFET | Reduces external component count and conduction losses in boost stage, enabling compact 2-layer PCB layouts. |
| 0.4V current-sense threshold | Lowers power dissipation in sense resistor (e.g., 20Ω dissipates only 160µW at 20mA), improving thermal margin. |
| Analog + PWM dual dimming | Supports both smooth analog adjustment and noise-immune digital PWM control without external circuitry. |
| Open-load shutdown at 40V | Prevents destructive overvoltage on LED string during disconnection or cold-solder joint failure. |
| Soft-start and thermal shutdown | Eliminates inrush current stress and provides fail-safe protection under sustained overload or poor heatsinking. |
Applications
| Handheld Computers | Digital Cameras |
|---|---|
|
Use Scenario: Backlighting for 3.5"–5" transflective LCD panels in ruggedized field computers. IC Role / Device Role / Timing Role: Constant-current boost driver delivering 18–20mA across 6–9 series LEDs from 3.6V Li-ion. Use Value: Maintains consistent luminance across battery discharge (2.7V–4.2V), with analog dimming synchronized to ambient light sensor output. |
Use Scenario: Flash illumination for 1080p video capture in ultra-compact camcorders. IC Role / Device Role / Timing Role: High-efficiency LED current source triggered by camera shutter signal via EN pin. Use Value: Delivers 20mA peak flash current with <330ns minimum off-time control, minimizing thermal buildup during burst mode. |
| PDA Phones | Small LCD Displays |
|
Use Scenario: Status indicator and keypad backlight in legacy PDA-phone hybrids with QVGA screens. IC Role / Device Role / Timing Role: Dual-mode driver supporting always-on dimmed status LEDs and full-brightness keypad illumination on demand. Use Value: Uses BRT pin for seamless transition between 2mA standby and 20mA active modes without firmware intervention. |
Use Scenario: Edge-lit monochrome graphic LCD in industrial HMI panels (e.g., 128×64 resolution). IC Role / Device Role / Timing Role: Single-chip solution powering 7–9 series LEDs from 5V rail or battery, with EN-controlled on/off sequencing. Use Value: Enables BIAS-to-input connection for simplified open-circuit disable, reducing BOM count in cost-sensitive designs. |
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 |
|---|---|---|---|
| MPQ1528DK-LF-Z | Automotive-grade AEC-Q100 qualified version; identical electrical specs but rated for –40°C to +125°C junction. | Required for automotive infotainment displays; not suitable for consumer handhelds due to higher cost and qualification overhead. | Select when operating ambient exceeds +85°C or ISO/TS 16949 compliance is mandatory. |
| LT3466EDD-TRPBF | Linear Tech (Analog Devices) 36V boost LED driver; 0.35Ω switch, 0.2V FB threshold, no integrated BRT analog dimming - requires external DAC or PWM generator. | Used where ultra-low noise or tighter current matching across multiple channels is prioritized over integration. | Choose when system already includes precision DAC infrastructure and thermal headroom allows lower RON trade-off. |
Compared with MP1528DK-LF-P, MPQ1528DK-LF-Z adds automotive qualification without altering functionality, while LT3466EDD-TRPBF trades integrated dimming for lower sense voltage and higher channel accuracy-making it preferable in multi-string synchronized lighting but less optimal for space-constrained single-string portable designs.
Availability
MP1528DK-LF-P is available at Aetrix Electronics and suitable for handheld computers, digital cameras, PDA phones, and small LCD displays requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for MP1528DK-LF-P 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 MP1528 product line targets portable and battery-powered LED lighting applications, emphasizing integration, efficiency, and robust fault protection in minimal footprint packages.
FAQ
What is the maximum number of white LEDs the MP1528DK-LF-P can drive?
The MP1528DK-LF-P is specified to drive up to nine (9) series-connected white LEDs, assuming typical forward voltage of ~3.2V per LED, resulting in a total string voltage up to ~28.8V - well within its 36V output capability and 40V open-load shutdown threshold.
Can the MP1528DK-LF-P operate from a 3.3V input source?
Yes - the MP1528DK-LF-P supports BIAS input from 2.7V to 36V. At 3.3V input, it can still drive up to 3–4 series white LEDs (depending on VF), maintaining regulation via boost topology; efficiency drops as input-output differential increases.
How does the BRT pin function in analog vs. PWM dimming modes?
In analog mode, BRT accepts 0.27V–1.2V DC to linearly scale LED current (e.g., 0.6V → 10mA); in PWM mode, it accepts a 100–400Hz square wave with low <0.18V (off) and high >1.2V (full on), enabling flicker-free dimming without changing FB threshold.
Is the exposed pad on the MSOP-8 package electrically connected?
No - the exposed thermal pad on MP1528DK-LF-P's MSOP-8 package is not internally connected to any circuit node; it must be soldered to a PCB thermal plane for heat dissipation but left floating electrically per MPS layout guidelines.
What happens if the BIAS pin is connected directly to VIN instead of the LED string anode?
Connecting BIAS to VIN disables open-load protection, reduces quiescent current (from ~100µA to ~5µA), and powers internal circuitry directly - acceptable in applications where LED string integrity is guaranteed and fault tolerance is secondary to power savings.
Does the MP1528DK-LF-P require an external Schottky diode?
Yes - the MP1528DK-LF-P requires an external Schottky rectifier (e.g., B160B) connected between SW and the LED string anode. The internal MOSFET is a switch only; no integrated diode or synchronous rectification is provided.
What is the minimum off-time specification and why does it matter?
The MP1528DK-LF-P has a 330ns minimum off-time in normal operation. This limits maximum switching frequency at low input voltages and high output ratios, affecting inductor size selection and ripple performance - critical for EMI-sensitive portable designs.
MP1528DK-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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):
- 2.7V
- Voltage - Supply (Max):
- 36V
- Voltage - Output:
- 36V
- Current - Output / Channel:
- 950mA (Switch)
- Frequency:
- -
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
MP1528DK-LF-P FAQ
1.How can I place an order for MP1528DK-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP1528DK-LF-P 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 MP1528DK-LF-P reliable?
The price and inventory of MP1528DK-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP1528DK-LF-P is usually 5 days.
3.What payment methods are accepted for MP1528DK-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP1528DK-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP1528DK-LF-P?
MP1528DK-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP1528DK-LF-P 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 MP1528DK-LF-P?
For technical support, including MP1528DK-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP1528DK-LF-P requirements.
6.How does Aetrix verify that MP1528DK-LF-P is sourced from the original manufacturer or authorized distributors?
All MP1528DK-LF-P 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 MP1528DK-LF-P meets industry standards.
7.What is the process for return or replacement of MP1528DK-LF-P?
All MP1528DK-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP1528DK-LF-P, 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 MP1528DK-LF-P part is unused and in its original packaging.
Return procedure for MP1528DK-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP1528DK-LF-P 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…
