MP4057AGK LED Driver IC - Equivalent & Substitute Parts

Part Overview

The MP4057AGK is an AC DC offline switcher LED driver IC manufactured by Monolithic Power Systems Inc., designed for LED lighting applications. This single-output power management IC integrates PWM dimming control with internal switching capability, supporting supply voltages from 4V to 25V across an operating temperature range of -40°C to 125°C. The device is currently in active product status with 1058 units in stock.

Substitute parts become necessary when the MP4057AGK reaches end-of-life, experiences supply constraints, or when design requirements necessitate alternative dimming topologies or package configurations. The parts listed below maintain functional equivalence within defined electrical and mechanical parameters.

Substiute Parts

MP4057AGK

Monolithic Power Systems Inc.In Stock: 1097MP4057AGK Datasheet

Current PartRFQ

AL1692S-13

Diodes IncorporatedIn Stock: 120128AL1692S-13 Datasheet

MFR RecommendedRFQ

TPS92001DR

Texas InstrumentsIn Stock: 878TPS92001DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MP4057AGK is determined by the following criteria:

Functional Requirements:

• Single output configuration
• AC DC offline switcher topology
• LED lighting application support
• Surface mount packaging

Electrical Compatibility:

• Supply voltage range overlap or containment within 4V to 25V
• Operating temperature range of -40°C minimum
• Dimming capability (PWM or Triac acceptable)

Regulatory & Compliance:

• ROHS3 compliance
• REACH unaffected status
• EAR99 classification

The substitute parts AL1692S-13 and TPS92001DR meet these criteria with the following considerations: AL1692S-13 operates within a narrower supply voltage range (8.5V to 20V) and uses Triac dimming instead of PWM. TPS92001DR has a maximum supply voltage of 21V and operates at a higher frequency (100kHz) with Triac dimming, and carries a Last Time Buy product status.

Parameter Comparison

Engineering Selection Recommendations

MP4057AGK (Primary Selection): Recommended for new designs and applications requiring PWM dimming control. Active product status ensures long-term availability. The integrated internal switch and extended supply voltage range (4V to 25V) provide design flexibility. Superior operating temperature range (-40°C to 125°C) supports demanding thermal environments.

AL1692S-13 (Secondary Substitute): Acceptable substitute when Triac dimming topology is compatible with system requirements. Narrower supply voltage range (8.5V to 20V) requires design verification. Active product status and high inventory availability (120,100 units) support production continuity. Package change from 10-MSOP to 8-SOIC requires PCB layout modification.

TPS92001DR (Limited Substitute): Suitable only for applications with fixed 5V output requirements and Triac dimming compatibility. Last Time Buy status indicates limited future availability; not recommended for new designs. Maximum supply voltage of 21V falls below the MP4057AGK specification. Use only for legacy system maintenance or when supply constraints necessitate immediate substitution.

Frequently Asked Questions (FAQ)

Q: Can AL1692S-13 directly replace MP4057AGK without circuit modification?

A: No. AL1692S-13 requires circuit redesign due to: (1) different package (8-SOIC vs. 10-MSOP), (2) absence of internal switch, (3) Triac dimming instead of PWM, and (4) narrower supply voltage range (8.5V to 20V vs. 4V to 25V).

Q: What is the primary difference between PWM and Triac dimming in these parts?

A: MP4057AGK uses PWM (Pulse Width Modulation) dimming, which controls LED brightness by varying the duty cycle at a fixed frequency. AL1692S-13 and TPS92001DR use Triac dimming, which controls brightness through phase-angle modulation of the AC input. System compatibility depends on the dimming interface and control circuitry.

Q: Why does TPS92001DR have Last Time Buy status?

A: Last Time Buy status indicates Texas Instruments has discontinued this product line. Existing inventory (855 units) represents the final available stock. This part should not be selected for new designs due to unavailability after current stock depletion.

Q: Are all three parts ROHS3 compliant?

A: Yes. MP4057AGK, AL1692S-13, and TPS92001DR are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the impact of the lower maximum operating temperature in substitute parts?

A: AL1692S-13 and TPS92001DR operate to 105°C maximum (junction or ambient), compared to MP4057AGK at 125°C. Applications requiring operation above 105°C require MP4057AGK or alternative parts with higher temperature ratings.

Q: Can the package size difference affect circuit performance?

A: Yes. The 10-MSOP package (0.118" width) differs from the 8-SOIC package (0.154" width) in pin pitch, thermal characteristics, and PCB footprint. Layout redesign is mandatory for substitution, and thermal performance may differ due to package construction variations.