AP2071AEN LED Driver IC Equivalent & Substitute Parts

Part Overview

The AP2071AEN is a 4-output LED driver IC manufactured by Asahi Kasei Microdevices (AKM) designed for camera flash applications. This device integrates a step-up (boost) DC-DC regulator with I2C-based dimming control, delivering up to 2A flash current from a 2.5V to 5.5V supply. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support.

Substiute Parts

AP2071AEN

Asahi Kasei Microdevices/AKMIn Stock: 1025AP2071AEN Datasheet

Current PartRFQ

BD93941FP-E2

Rohm SemiconductorIn Stock: 2871BD93941FP-E2 Datasheet

MFR RecommendedRFQ

BD9394FP-E2

Rohm SemiconductorIn Stock: 3150BD9394FP-E2 Datasheet

MFR RecommendedRFQ

LT3599HFE#PBF

Analog Devices Inc.In Stock: 2162LT3599HFE#PBF Datasheet

MFR RecommendedRFQ

MP3384LGQ-Z

Monolithic Power Systems Inc.In Stock: 6273MP3384LGQ-Z Datasheet

MFR RecommendedRFQ

TPS61194PWPR

Texas InstrumentsIn Stock: 1359TPS61194PWPR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP2071AEN is determined by the following critical parameters:

• Topology: Step-up (boost) DC-DC regulator with 4 outputs
• Internal Switch: Integrated power switch required
• Supply Voltage Range: Minimum 2.5V input capability preferred for battery-powered applications
• Output Current Capability: Flash current delivery (100mA to 2A per channel)
• Dimming Control Method: I2C or PWM-based control
• Package Type: Surface mount with thermal management
• Product Status: Active or not-for-new-designs parts acceptable for legacy support

The substitute parts listed below meet these core functional requirements while accommodating variations in package size, frequency, and dimming methodology. Substitutes are grouped by their suitability for camera flash versus backlight applications.

Parameter Comparison

Engineering Selection Recommendations

For Camera Flash Applications (Primary Use Case):

The AP2071AEN was specifically designed for camera flash with 2A per-channel capability and I2C dimming. Direct functional equivalents with comparable flash current are limited. The TPS61194PWPR (Texas Instruments) is the closest active substitute, offering 100mA per channel with PWM dimming and a wide supply voltage range (4.5V to 40V). This part requires firmware modification to replace I2C control with PWM-based dimming but maintains the 4-output topology and boost topology.

For Backlight Applications (Secondary Consideration):

If application requirements permit lower current operation, the BD9394FP-E2 (Rohm, Active status) provides 150mA per channel with analog/PWM dimming and is suitable for backlight-driven LED arrays. The LT3599HFE#PBF (Analog Devices, Active status) offers superior temperature range (-40°C to 150°C junction temperature) and flexible frequency control (200kHz to 2.1MHz), making it suitable for extended operating environments.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance. The BD9394FP-E2 and LT3599HFE#PBF carry Active product status, ensuring long-term availability and manufacturing support. The BD93941FP-E2 is classified as Not For New Designs but remains available for legacy system support.

Frequently Asked Questions (FAQ)

Q: Can the AP2071AEN be directly replaced with any of these substitutes without circuit modification?

A: No. The AP2071AEN uses I2C dimming control, while most substitutes employ PWM or analog dimming. Circuit modifications to the control interface are required. The TPS61194PWPR is the closest match in terms of topology and output count but requires PWM control implementation instead of I2C.

Q: What is the primary limitation when substituting for camera flash applications?

A: Current delivery per channel is significantly reduced in all substitutes. The AP2071AEN delivers 2A per channel for flash, while the TPS61194PWPR (best substitute) delivers only 100mA. Applications requiring full 2A flash current cannot be directly substituted and require alternative architecture or parallel channel configuration.

Q: Are package changes acceptable?

A: Package changes are acceptable if PCB layout can accommodate the new footprint. The AP2071AEN uses 24-HQFN (4x4), while substitutes range from 16-QFN (3x3) to 28-TSSOP-EP. Thermal performance and board space must be re-evaluated for each package variant.

Q: Which substitute offers the best temperature range?

A: The LT3599HFE#PBF provides the widest operating temperature range at -40°C to 150°C (junction temperature), compared to the AP2071AEN's -30°C to 85°C. This makes it suitable for automotive or industrial applications requiring extended thermal performance.

Q: What is the difference between MSL ratings, and does it affect substitution?

A: MSL (Moisture Sensitivity Level) indicates how long a component can be stored after moisture absorption. The AP2071AEN has MSL 1 (unlimited storage), while most substitutes have MSL 2 or 3 (1 year or 168 hours respectively). Higher MSL ratings require stricter moisture control during storage and assembly, potentially increasing manufacturing complexity.

Q: Can I use the MP3384LGQ-Z as a substitute?

A: The MP3384LGQ-Z is functionally compatible as a 4-output boost regulator with PWM dimming but delivers only 30mA per channel. It is suitable only for low-power backlight applications, not camera flash. Its smaller 16-QFN package also reduces board space requirements.