AL9901S16-13 Equivalent & Substitute Parts

Part Overview

The AL9901S16-13 is an AC DC offline switcher LED driver IC manufactured by Diodes Incorporated, designed for applications requiring offline PWM dimming control. This single-output step-down (buck) topology device operates across a wide input voltage range of 15V to 500V and delivers 400mA output current at 7.5V. The device is actively produced and RoHS3 compliant, making it suitable for backlight, lighting, and signage applications. Substitute parts are identified when equivalent functional performance can be achieved within the specified electrical and mechanical parameters of this product category.

Substiute Parts

AL9901S16-13

Diodes IncorporatedIn Stock: 2413AL9901S16-13 Datasheet

Current PartRFQ

HV9801ANG-G

Microchip TechnologyIn Stock: 1909HV9801ANG-G Datasheet

MFR RecommendedRFQ

HV9922N8-G

Microchip TechnologyIn Stock: 25135HV9922N8-G Datasheet

MFR RecommendedRFQ

LM3445MM/NOPB

Texas InstrumentsIn Stock: 21141LM3445MM/NOPB Datasheet

MFR RecommendedRFQ

LNK420EG

Power IntegrationsIn Stock: 18277LNK420EG Datasheet

MFR RecommendedRFQ

TPS92411DDA

Texas InstrumentsIn Stock: 1805TPS92411DDA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AL9901S16-13 are grouped based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• AC DC offline switcher topology with single output
• Step-down (buck) converter configuration
• Surface mount packaging in 16-pin or compatible form factor
• Input voltage range compatibility (minimum 15V supply capability)
• Output voltage capability at 7.5V
• RoHS3 compliance and active product status

Substitution Logic: Parts are considered equivalent when they maintain the core offline switcher architecture and can operate within the specified voltage and current parameters. Variations in switching frequency, dimming method (PWM vs. Triac), internal switch configuration, and specific package dimensions are noted as design trade-offs that may affect circuit implementation but do not preclude functional substitution in applications where these parameters are acceptable.

Parameter Comparison

Engineering Selection Recommendations

HV9801ANG-G (Microchip Technology): Maintains identical input voltage range (15V to 450V) and output voltage (7.5V) as the AL9901S16-13. Both devices are RoHS3 compliant and actively produced. The 16-SOIC package matches the original part, enabling direct PCB compatibility. Primary design consideration is the absence of an internal switch and lower switching frequency (1.2kHz vs. 300kHz), which may affect EMI characteristics and component sizing.

HV9922N8-G (Microchip Technology): Operates within compatible input voltage range (20V to 400V) with RoHS3 compliance and active status. This part uses Triac dimming instead of PWM and is packaged in TO-243AA (SOT-89-3), requiring PCB layout modification. Output current is significantly lower at 50mA, limiting applicability to lower-power lighting circuits.

LM3445MM/NOPB (Texas Instruments): RoHS3 compliant and actively produced. Input voltage range (8V to 12V) is substantially narrower than the AL9901S16-13, restricting this part to low-voltage offline applications. Triac dimming control and 10-VSSOP package require circuit redesign. This part is suitable only for applications with fixed low-voltage input specifications.

LNK420EG (Power Integrations): Operates across a wide input voltage range (36V to 725V) with RoHS compliance and active production status. Flyback topology differs from the buck converter of the original part. Through-hole eSIP-7C package requires different PCB footprint and assembly process. Higher output current capability (4.9A) and extended temperature range (-40°C to 150°C) provide performance advantages in specific high-power applications.

TPS92411DDA (Texas Instruments): RoHS3 compliant and actively produced with extended temperature range (-40°C to 150°C). Supports multiple topologies (Flyback, Buck, Boost) and operates across 7.5V to 100V input range. MSL rating of 2 (1 Year) requires moisture control during storage and assembly. 8-PowerSOIC package differs from the original 16-SOIC, necessitating PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can HV9801ANG-G directly replace AL9901S16-13 on the same PCB?

A: The HV9801ANG-G shares the 16-SOIC package and identical input/output voltage specifications with AL9901S16-13, enabling direct footprint compatibility. However, the absence of an internal switch and lower switching frequency (1.2kHz) may require validation of EMI performance and external component values in the specific application circuit.

Q: What is the primary difference between PWM and Triac dimming control?

A: PWM dimming modulates the duty cycle of the switching signal at a fixed frequency, while Triac dimming responds to phase-angle control signals from AC line dimmers. HV9922N8-G and LM3445MM/NOPB use Triac dimming, making them suitable for applications requiring compatibility with standard wall-mounted dimmers. AL9901S16-13 supports both PWM and analog dimming, offering greater flexibility.

Q: Why does LNK420EG use through-hole packaging instead of surface mount?

A: The LNK420EG employs eSIP-7C through-hole packaging, which is characteristic of Power Integrations' LinkSwitch-PH series. This packaging style provides robust thermal management and simplified assembly in certain manufacturing environments. PCB layout and assembly process modifications are required for integration.

Q: Is LM3445MM/NOPB suitable for the same applications as AL9901S16-13?

A: LM3445MM/NOPB is limited to applications with 8V to 12V input voltage, whereas AL9901S16-13 operates from 15V to 500V. This narrow input range restricts LM3445MM/NOPB to low-voltage offline converter designs and is not suitable for high-voltage applications such as mains-powered lighting systems.

Q: What does MSL rating mean for TPS92411DDA?

A: MSL (Moisture Sensitivity Level) 2 indicates the component requires protection from moisture exposure for up to 1 year after packaging. TPS92411DDA must be stored in dry conditions and processed within the specified timeframe to prevent moisture absorption, which could cause solder joint failures during reflow assembly.

Q: Can multiple substitute parts be used interchangeably in production?

A: No. Each substitute part has distinct electrical characteristics, package configurations, and dimming control methods. Production designs must select a single part number and validate it through complete circuit testing. Switching between substitute parts requires design review and re-qualification.

Q: Which substitute offers the widest input voltage range?

A: LNK420EG provides the widest input voltage range at 36V to 725V, exceeding AL9901S16-13's 15V to 500V range. However, its Flyback topology and through-hole packaging require significant circuit redesign compared to the original buck converter architecture.