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Monolithic Power Systems Inc. MP4008GS-P
- Part No.:
- MP4008GS-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP4008GS-P.pdf
- Description:
- HIGH-BRIGHTNESS, HIGH-CURRENT AC
- Quantity:
- Payment:
- Shipping:
Inventory:1,912
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Product details
Overview
MP4008GS-P from Monolithic Power Systems is a constant-current, current-mode WLED controller for high-brightness LED backlighting and industrial lighting. It operates from 9V–28V input, drives external MOSFETs in boost or SEPIC topologies, regulates LED current via 280mV ±1.8% feedback voltage, fixes switching frequency at 180kHz, and supports fast PWM dimming with >1000:1 ratio. Used in LCD TV backlight systems requiring stable current accuracy under wide input and thermal variation.
For engineers reviewing the MP4008GS-P datasheet, MP4008GS-P pinout, MP4008GS-P application, or MP4008GS-P equivalent, key selection criteria include its 280mV precision FB threshold, SOIC-8 package compatibility, integrated short-LED/short-output/OTP protection, cycle-by-cycle OCP programmability via CS resistor, and soft-start behavior defined by 21µA COMP charging current.
Technical Context
The MP4008GS-P implements peak-current-mode control with integrated slope compensation to suppress sub-harmonic oscillation above 50% duty cycle. Its error amplifier features 440µA/V transconductance and 80µA max sourcing/sinking capability, with COMP pin serving dual roles: loop compensation (via RC network) and soft-start timing (21µA current-limited charge until FB reaches 80% of reference).
Protection architecture includes latched-off responses for short-LED (FB > 580mV for 1µs), short-circuit (OVP < 280mV + FB < 0.3×REF + COMP > 1V), and over-current (CS > 485mV for 7 consecutive cycles within 300ns blanking window). UVLO (8.6V rising, 600mV hysteresis) and OVP (2.75V threshold, 410mV hysteresis on OVP pin) are independently configurable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 9V–28V - Supports automotive battery rail (12V nominal) and industrial 24V systems without pre-regulation. |
| Feedback Voltage | 280mV ±1.8% - Enables precise LED current setting (e.g., 350mA with 0.8Ω RFB) with minimal drift across temperature. |
| Switching Frequency | 180kHz fixed - Balances EMI control and inductor size; avoids audible noise while enabling compact magnetics. |
| Current Sense Threshold | 485mV OCP trip - Sets cycle-by-cycle MOSFET current limit; determines peak inductor current and power stage stress. |
| Thermal Shutdown | 150°C junction - Latched-off response prevents permanent damage during sustained overload or poor heatsinking. |
| PWM Dimming Input | 0.8V low / 1.5V high thresholds - Compatible with standard logic-level microcontrollers; enables clean gate disable/enable transitions. |
| Gate Drive Rise/Fall Time | 40ns @ 1nF load - Ensures fast MOSFET switching to minimize conduction losses and improve efficiency at high current. |
Pinout & Package
MP4008GS-P is housed in a standard SOIC-8 package (5.0mm × 6.2mm, 1.27mm pitch), optimized for thermal dissipation (θJA = 96°C/W) and PCB layout simplicity in high-current LED driver applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Input supply rail | 9V–28V primary input; powers internal LDO and gate driver; requires local ceramic bypass (≥10µF X7R). |
| 2 GND | Power and signal ground | Common return for CS, FB, OVP, PWM, COMP; must be low-impedance star point to avoid sensing errors. |
| 3 CS | Cycle-by-cycle current sense input | Detects external MOSFET source current; integrates 200ns leading-edge blanking to reject switch-node noise. |
| 4 GATE | External N-channel MOSFET gate driver | 13.8V max output; 40ns rise/fall into 1nF; drives boost/SEPIC power FET directly without buffer. |
| 5 PWM | Brightness control interface | Logic-level input; disables GATE when low (open-drain compatible); synchronizes internal oscillator for jitter-free dimming. |
| 6 COMP | Loop compensation & soft-start node | Connects to RC network for stability; internal 21µA current source charges it during startup until FB reaches 80% of reference. |
| 7 FB | LED current sense feedback | 280mV reference; connects to current-sense resistor (RFB) from LED cathode to GND; triggers latch-off if >580mV for 1µs. |
| 8 OVP | Programmable over-voltage protection input | Resistor-divider input; trips at 2.75V; recovers when voltage drops 410mV below threshold; sets output voltage safety margin. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-current regulation | 280mV ±1.8% FB reference ensures LED current accuracy remains within ±2% over line, load, and temperature. |
| Integrated protection suite | Latched-off responses for UVLO, OVP, short-LED, short-output, short-inductor/diode, and OTP eliminate need for external fault management circuitry. |
| Fast PWM dimming | Supports >1000:1 dimming ratio with synchronized oscillator-enables flicker-free, high-contrast LCD backlight control. |
| Leading-edge blanking | 200ns programmable blanking on CS pin rejects gate-drive-induced noise, enabling reliable current sensing in noisy boost environments. |
| Soft-start control | 21µA COMP charging current limits inrush; prevents overshoot and stabilizes LED current ramp-up without external components. |
Applications
| LCD TV Backlighting | Industrial LED Lighting |
|---|---|
|
Use Scenario: Driving 12–24 series white LEDs in edge-lit LCD TVs with 70V output and 350mA current. IC Role / Device Role / Timing Role: Constant-current WLED controller implementing boost topology with 180kHz switching and fast PWM dimming. Use Value: Maintains uniform brightness across large panels using 280mV ±1.8% current regulation, minimizing luminance variance between zones. |
Use Scenario: High-reliability LED fixtures for factory floor lighting operating from 24V DC industrial rails. IC Role / Device Role / Timing Role: Primary LED current regulator in SEPIC configuration supporting wide input (9–28V) and output voltage variations. Use Value: Integrated short-LED and OTP protection ensures continuous operation in dusty, thermally demanding environments without field failures. |
| Automotive Interior Lighting | Commercial Signage Illumination |
|
Use Scenario: RGBW ambient lighting modules powered from 12V vehicle battery with transient tolerance up to 28V. IC Role / Device Role / Timing Role: Current controller for white LED strings with UVLO (8.6V) and OVP (programmable via OVP pin) for battery voltage fluctuations. Use Value: 600mV UVLO hysteresis prevents cycling during cranking; 150°C thermal shutdown protects against enclosed fixture overheating. |
Use Scenario: Outdoor digital signage requiring high-brightness LED arrays with dimming control and surge resilience. IC Role / Device Role / Timing Role: High-current WLED driver in boost configuration delivering up to 70V output with fast PWM for dynamic content rendering. Use Value: 485mV OCP threshold enables precise MOSFET current limiting; leading-edge blanking ensures stable operation amid ESD and conducted noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar WLED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409MH/NOPB | Adjustable FB reference (0.21V), 1.25MHz switching, no integrated OVP pin - requires external divider and protection IC. | Higher-frequency operation suits smaller inductors but increases EMI filtering complexity; lacks latch-off short-LED protection. | Prefer when board space is critical and system-level OVP can be implemented externally; not drop-in for MP4008GS-P's integrated safety features. |
| TPS61165DRVR | Fixed 1.2MHz frequency, 200mV FB, integrated 40V switch - no external MOSFET support; limited to ≤38V output. | Single-chip solution eliminates external FET but restricts topology to boost only and caps output voltage below MP4008GS-P's 70V capability. | Select when cost-sensitive, low-power (<500mA) LED strings are used and external MOSFET drive is unnecessary. |
Compared with LM3409MH/NOPB and TPS61165DRVR, MP4008GS-P uniquely combines external MOSFET drive, programmable OVP, latch-off short-LED protection, and 280mV precision current sensing - making it optimal for high-reliability, high-voltage LED systems where safety and accuracy are non-negotiable.
Availability
MP4008GS-P is available at Aetrix Electronics and suitable for LCD backlighting, industrial LED lighting, and automotive interior illumination requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MP4008GS-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP4008 product line targets high-current, high-accuracy LED lighting applications-designed specifically for robustness in automotive, industrial, and commercial backlight systems where thermal resilience and integrated protection are essential.
FAQ
What is the maximum output voltage supported by MP4008GS-P?
The MP4008GS-P itself does not impose a hard output voltage limit-it relies on external components. In typical boost applications, it supports up to 70V output (as validated in MPS datasheet Figure 6), constrained by MOSFET breakdown voltage, diode rating, and OVP divider setting. The OVP pin allows programming protection thresholds up to ~60V using standard resistor values.
Can MP4008GS-P operate in discontinuous conduction mode (DCM)?
Yes, MP4008GS-P supports both continuous and discontinuous conduction modes. Its current-mode architecture and integrated slope compensation ensure stable regulation in CCM, while DCM operation is permissible at light loads. However, compensation network design must account for right-half-plane zero elimination only in CCM; DCM simplifies loop stability but reduces efficiency at low currents.
How is the soft-start duration determined for MP4008GS-P?
Soft-start duration is set by the external capacitor on the COMP pin and the internal 21µA charging current. For example, with a 100nF capacitor, time to reach 0.3V (typical clamp level) is ~1.4ms. Full soft-start completes when FB voltage reaches 80% of the 280mV reference (~224mV), which depends on RFB, LED forward voltage, and inductor value.
Does MP4008GS-P support analog dimming in addition to PWM?
No-MP4008GS-P supports only PWM dimming via the dedicated PWM pin. It does not include an analog dimming interface (e.g., IADJ or CTRL pin). Analog dimming would require external circuitry to modulate the FB reference or current-sense resistor, compromising accuracy and violating the IC's specified operation.
What is the minimum recommended input capacitance for MP4008GS-P?
MPS recommends ≥10µF ceramic (X7R) at the VIN pin, placed within 5mm of pins 1 and 2. This minimizes input ripple and high-frequency noise coupling. For 24V/350mA applications, a 22µF/35V X7R capacitor with ≤10mΩ ESR meets ripple requirements (ΔVIN < 5%) and withstands surge currents during startup and PWM transitions.
Is MP4008GS-P qualified for automotive AEC-Q100 testing?
No-MP4008GS-P is not AEC-Q100 qualified. It is rated for industrial temperature range (–40°C to +125°C junction), but lacks automotive-specific qualification including HTOL, ESD, and vibration testing. For automotive applications, designers must perform system-level validation per ISO 16750 and conduct additional reliability screening.
How does the CS pin's leading-edge blanking interact with slope compensation?
The 200ns leading-edge blanking on CS occurs before slope compensation is applied, preventing false OCP triggering from switch-node ringing. Slope compensation then adds a ramp to the sensed current waveform during the remainder of the on-time, ensuring stable current-mode control when duty cycle exceeds 50%-critical for high-VOUT/VIN boost ratios.
MP4008GS-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- SEPIC, Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 9V
- Voltage - Supply (Max):
- 28V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 180kHz
- Dimming:
- PWM
- Applications:
- Backlight, Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MP4008GS-P FAQ
1.How can I place an order for MP4008GS-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4008GS-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 MP4008GS-P reliable?
The price and inventory of MP4008GS-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4008GS-P is usually 5 days.
3.What payment methods are accepted for MP4008GS-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4008GS-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4008GS-P?
MP4008GS-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4008GS-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 MP4008GS-P?
For technical support, including MP4008GS-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4008GS-P requirements.
6.How does Aetrix verify that MP4008GS-P is sourced from the original manufacturer or authorized distributors?
All MP4008GS-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 MP4008GS-P meets industry standards.
7.What is the process for return or replacement of MP4008GS-P?
All MP4008GS-P units undergo pre-shipment inspection (PSI). If there is an issue with MP4008GS-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 MP4008GS-P part is unused and in its original packaging.
Return procedure for MP4008GS-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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