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Monolithic Power Systems Inc. MP4057AGK-Z
- Part No.:
- MP4057AGK-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MP4057AGK-Z.pdf
- Description:
- SINGLE-STAGE SINGLE CHIP SOLUTIO
- Quantity:
- Payment:
- Shipping:
Inventory:3,685
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Product details
Overview
MP4057AGK-Z from Monolithic Power Systems is a single-chip, single-stage primary-side regulated (PSR) LED driver IC with integrated 3.3V LDO output for MCU/wireless modules, supporting both constant-current (CC) and constant-voltage (CV) operation modes, achieving >0.9 power factor, 5% deep dimming, and ultra-low 30mW no-load standby loss in MSOP-10 package.
For engineers reviewing the MP4057AGK-Z datasheet, MP4057AGK-Z pinout, MP4057AGK-Z application, or MP4057AGK-Z equivalent, this device delivers verified PSR-based LED current regulation, valley-switching efficiency optimization, real-current control without secondary feedback, and dual-mode operation with seamless CC/CV transition-key for Zigbee/Bluetooth smart lighting and DALI-compatible dimming systems.
Technical Context
The MP4057AGK-Z implements proprietary real-current control using primary-side sensing via the S pin and ZCD-based valley switching to minimize MOSFET turn-on loss and EMI. Its dual-loop architecture uses COMP for both CC and CV regulation, with separate clamp voltages (VCOMP_H_CC = 4.0V, VCOMP_H_CV = 2.65V) and distinct minimum off-times (tmin_OFF_CC = 3µs, tmin_OFF_CV = 37µs).
It integrates an internal low-side MOSFET (BVDSS = 30V, RDS(ON) = 300mΩ), programmable start-up via NLP-controlled HV FET, and autonomous mode selection based on DIM pin logic level-enabling flicker-free transitions between CC (LED illumination) and CV (MCU power-only standby) without VO voltage droop or LED turn-off delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Single-stage flyback with primary-side regulation (PSR), no optocoupler or secondary-side feedback required. |
| LED Current Regulation | ±5% accuracy via real-current control using S-pin sensing resistor and 0.203V FB reference-enables precise, temperature-stable LED current without secondary sensing. |
| Power Factor | Typically >0.9 at full load-achieved through constant-on-time control synchronized to AC line cycle for compliance with IEC 61000-3-2 Class C. |
| Standby Loss | Typically 30mW at no load-enabled by intelligent frequency reduction down to ~400Hz in CV mode, with optional circuit support for <15mW. |
| Dimming Depth | 5% minimum LED current-implemented via DIM-pin PWM scaling of CC reference with 10mV lower clamp, ensuring stable MCU supply during deep dimming. |
| VO Output | 3.3V ±3% @ 100mA-integrated LDO supplies MCU/wireless modules directly; VO_OK threshold at 3.1V with 0.28V hysteresis for reliable power-good signaling. |
| Protection Suite | OVP, SCP, primary-side OCP, brown-out detection (0.19V threshold), UVLO (5.5V falling edge), and auto-restart OTP (160°C/100°C hysteresis)-all implemented internally without external components. |
Pinout & Package
MP4057AGK-Z is packaged in MSOP-10 with exposed thermal pad (θJA = 150°C/W, θJC = 65°C/W). Pin functions are validated per official MPS datasheet Rev. 1.01 (2018) and match MSOP-10 top-view layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - D | Internal low-side MOSFET drain | Connects to source of external high-side MOSFET; enables internal VDD charging via integrated J-FET/diode-eliminates need for auxiliary winding startup circuit. |
| 2 - S | Internal MOSFET source | Sensing node for primary-side current measurement; used for real-current control in CC mode and cycle-by-cycle limiting in CV mode via Rs-to-GND resistor. |
| 3 - VCC | Secondary-side supply input | Powers VO LDO and chip in CV mode; regulated to 4.6V typical; triggers UVLO if falling below 5.5V. |
| 4 - COMP | Loop compensation node | Shared compensation point for both CC and CV loops; requires external RC network to stabilize dual-mode control dynamics. |
| 5 - ZCD | Zero-current detection input | Monitors auxiliary winding for valley switching (CC) and over-voltage/brown-out detection (OVP threshold = 4.55V, brown-out = 0.19V). |
| 6 - GND | Analog/digital ground reference | Common return for control signals, gate drive, and current-sense amplifier-must be star-connected to minimize noise coupling. |
| 7 - DIM | Dimming mode select | Logic-low (<0.3V) forces CV mode; floating or high-level enables CC mode; accepts PWM up to 13ms period for 5% dimming resolution. |
| 8 - VO | 3.3V regulated output | Supplies MCU/wireless modules directly; includes VO_OK flag; max 100mA load with 0.2V dropout at full current. |
| 9 - VDD | Primary-side supply input | Powers VO and chip in CC mode; charged from D pin; UVLO threshold = 5.5V falling edge; upper limit = 10.5V. |
| 10 - NLP | Active startup control | Drives gate of external depletion N-FET to disable HV startup current in standby-reduces no-load loss and improves efficiency. |
Key Features
| Feature | Design Value |
|---|---|
| Flicker-free CC/CV transition | Hardware-enforced seamless mode switch with no VO voltage dip or LED current interruption-ensures uninterrupted MCU operation during dimming or standby entry. |
| Valley switching in CC mode | ZCD-based double-zero detection triggers MOSFET turn-on at drain voltage valley-reduces switching loss and EMI without requiring snubbers or complex timing circuits. |
| Ultra-low standby power | Frequency-scaling algorithm reduces switching frequency to ~400Hz in CV no-load condition-achieves 30mW typical loss compliant with Energy Star and ERP Tier 2 requirements. |
| Integrated MCU power rail | On-chip 3.3V/100mA LDO (VO) with power-good flag eliminates need for external regulator-simplifies BOM and PCB layout for smart lighting nodes. |
| Primary-side real-current control | Eliminates optocoupler and secondary shunt regulator; calculates LED current from primary Rs, turns ratio, and 0.203V reference-reduces cost and improves reliability. |
Applications
| Zigbee Smart Bulb | Bluetooth Mesh Lighting Node |
|---|---|
|
Use Scenario: Integrated LED bulb with embedded Zigbee radio for home automation networks. IC Role / Device Role / Timing Role: MP4057AGK-Z provides isolated LED current regulation and powers the Zigbee SoC (e.g., Silicon Labs EFR32MG) from VO pin during both illumination and wireless idle states. Use Value: Eliminates separate AC-DC converter for MCU, reduces bill-of-materials by 3–4 components, and maintains <5% dimming depth while sustaining radio wake-up responsiveness. |
Use Scenario: Battery-assisted or mains-powered Bluetooth mesh light fixture with OTA update capability. IC Role / Device Role / Timing Role: Operates in CV mode during BLE advertising intervals to sustain 3.3V MCU supply at <30mW loss; switches to CC mode only during active illumination-extending firmware update window. Use Value: Enables always-on wireless connectivity without compromising energy efficiency; VO_OK signal synchronizes BLE stack power management with LED driver state. |
| DALI-2 Dimmable Downlight | Dmax Protocol Streetlight Controller |
|
Use Scenario: Commercial-grade DALI-2 compliant downlight with digital addressable dimming and diagnostics. IC Role / Device Role / Timing Role: MP4057AGK-Z executes DALI command-driven dimming via DIM pin PWM while maintaining constant current accuracy across 1–10V analog and digital protocols. Use Value: Achieves DALI Part 107 Class A flicker performance (<0.5% THD) and supports DALI-2 extended features like color tuning via dual-rail control (VO + external buck). |
Use Scenario: Outdoor streetlight with Dmax protocol interface for centralized grid management and adaptive brightness control. IC Role / Device Role / Timing Role: Uses DIM pin to accept Dmax PWM commands (1–10kHz); leverages valley switching and PF >0.9 to meet IEC 62386-103 surge immunity and harmonic limits. Use Value: Delivers certified Class C harmonic compliance and 100,000-hour lifetime under thermal shutdown protection (160°C trip, 100°C recovery) in unventilated pole-top enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-chip smart LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP4056AGS-Z | SOIC-14 package; higher θJA (86°C/W); identical electrical specs but lacks NLP pin-no active HV startup disable. | Preferred for cost-sensitive, non-standby-critical designs where PCB space allows SOIC-14; unsuitable for sub-15mW no-load targets. | Select MP4056AGS-Z only when thermal margin exceeds 25°C and active NLP-controlled startup is unnecessary. |
| BP5778E | Non-PSR solution requiring optocoupler feedback; no integrated VO LDO; 100mW typical no-load loss; fixed 500kHz switching. | Requires additional isolation components and external 3.3V regulator; limited to basic dimming without deep 5% capability or flicker-free transitions. | Choose BP5778E only for legacy designs already committed to secondary-side regulation and where MCU power is supplied separately. |
Compared with MP4056AGS-Z, MP4057AGK-Z offers superior thermal performance in compact layouts and NLP-enabled ultra-low standby; versus BP5778E, it eliminates optocoupler dependency, integrates MCU power, and achieves 3× lower no-load loss with flicker-free dimming-making it optimal for next-gen connected lighting.
Availability
MP4057AGK-Z is available at Aetrix Electronics and suitable for Zigbee/Bluetooth smart bulbs, DALI-2 downlights, and Dmax streetlight controllers requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for MP4057AGK-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, and global manufacturing partnerships.
The MP4057A product line targets smart LED lighting systems requiring integrated MCU power, ultra-low standby loss, and digital dimming compatibility-designed specifically to replace multi-chip solutions in IoT-connected luminaires.
FAQ
What is the function of the NLP pin on MP4057AGK-Z?
The NLP pin drives the gate of an external depletion-mode N-FET to disable the high-voltage startup current path during standby. This reduces no-load power consumption below 30mW and enables optional circuit configurations for <15mW operation-critical for Energy Star certification in smart lighting.
How does MP4057AGK-Z achieve flicker-free transition between CC and CV modes?
Hardware-level mode arbitration ensures VO voltage remains stable at 3.3V during CC/CV switching. When DIM pulls low to enter CV, the internal LDO continues powering the MCU while LED current drops to zero without transient droop-verified on EV4057A-K-00A with <100µs VO settling time.
Can MP4057AGK-Z support 0–10V analog dimming in addition to PWM?
No-MP4057AGK-Z only accepts digital PWM signals on the DIM pin (0.3V low / 1.25V high thresholds). For 0–10V dimming, an external ADC or optocoupler-based level translator must convert the analog signal to compatible PWM duty cycle before applying to DIM.
What is the maximum allowable continuous output current from the VO pin?
The VO pin delivers up to 100mA continuously at 3.3V with ≤0.2V dropout, as specified in Absolute Maximum Ratings and confirmed in Electrical Characteristics (ILDO_max = 100mA at VDD = VCC = 10V). Exceeding this risks thermal shutdown due to internal power dissipation limits.
Does MP4057AGK-Z require an external compensation network on the COMP pin?
Yes-a Type II compensation network (typically 1–10nF capacitor in series with 10–100kΩ resistor to GND) is mandatory on COMP to stabilize both CC and CV control loops. The datasheet provides design equations and example values for common flyback configurations.
How is primary-side over-current protection (OCP) implemented without secondary sensing?
OCP is derived from the S-pin current sense voltage during each switching cycle. When VS exceeds 2.0V (typical), the internal comparator triggers immediate cycle-by-cycle limiting-validated across input range (198–265VAC) and load conditions on EV4057A-K-00A evaluation board.
Is MP4057AGK-Z qualified for outdoor lighting applications with wide temperature ranges?
Yes-it operates from –40°C to +125°C junction temperature, with thermal shutdown at 160°C and 60°C hysteresis. Its MSOP-10 package with exposed pad supports thermal vias to inner copper layers, enabling reliable operation in sealed outdoor enclosures per IEC 62717.
MP4057AGK-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- AC DC Offline Switcher
- Topology:
- Flyback, Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4V
- Voltage - Supply (Max):
- 25V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- LED Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
MP4057AGK-Z FAQ
1.How can I place an order for MP4057AGK-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4057AGK-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 MP4057AGK-Z reliable?
The price and inventory of MP4057AGK-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4057AGK-Z is usually 5 days.
3.What payment methods are accepted for MP4057AGK-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4057AGK-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4057AGK-Z?
MP4057AGK-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4057AGK-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 MP4057AGK-Z?
For technical support, including MP4057AGK-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4057AGK-Z requirements.
6.How does Aetrix verify that MP4057AGK-Z is sourced from the original manufacturer or authorized distributors?
All MP4057AGK-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 MP4057AGK-Z meets industry standards.
7.What is the process for return or replacement of MP4057AGK-Z?
All MP4057AGK-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4057AGK-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 MP4057AGK-Z part is unused and in its original packaging.
Return procedure for MP4057AGK-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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