AP3608EM-G1 Equivalent & Substitute Parts

Part Overview

The AP3608EM-G1 is a linear LED driver IC manufactured by Diodes Incorporated, designed for 8-output PWM dimming applications with 100mA per-channel output capability. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The AP3608EM-G1 operates across a 4.2V to 5.5V supply range and is optimized for backlight applications requiring linear PWM control.

Substiute Parts

AP3608EM-G1

Diodes IncorporatedIn Stock: 30483AP3608EM-G1 Datasheet

Current PartRFQ

TLC5917IPW

Texas InstrumentsIn Stock: 3715TLC5917IPW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AP3608EM-G1 is determined by the following critical parameters:

• Number of Outputs: Must equal 8 channels
• Current - Output / Channel: Minimum 100mA per channel
• Voltage - Supply Range: Must encompass or exceed 4.2V to 5.5V
• Dimming Capability: PWM or equivalent control method
• Package Type: Surface mount configuration
• Compliance: ROHS3 and REACH compliance maintained

The TLC5917IPW from Texas Instruments meets these substitution criteria. While it operates across a wider supply range (3V to 5.5V) and provides higher per-channel current (120mA), it maintains 8-output configuration and surface-mount packaging. The shift-register topology and higher frequency capability (30MHz) represent functional enhancements suitable for backlight and signage applications.

Parameter Comparison

Engineering Selection Recommendations

The TLC5917IPW is an active-status substitute for the obsolete AP3608EM-G1. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity. The TLC5917IPW provides extended temperature operation (-40°C to 125°C versus -40°C to 85°C) and increased per-channel current capacity (120mA versus 100mA), making it suitable for designs requiring enhanced thermal performance or higher output current margins.

Package transition from 20-SOIC to 16-TSSOP requires PCB layout modification. The TLC5917IPW's lower minimum supply voltage (3V versus 4.2V) expands operational flexibility for battery-powered or low-voltage applications.

Frequently Asked Questions (FAQ)

Q: Can the TLC5917IPW directly replace the AP3608EM-G1 without design changes?

A: Pin-to-pin compatibility is not guaranteed due to different package types (20-SOIC versus 16-TSSOP) and pin counts. PCB layout redesign is required. Functional compatibility exists for 8-output LED driving applications within the specified voltage and current parameters.

Q: What are the key differences in topology between these devices?

A: The AP3608EM-G1 uses linear PWM dimming control, while the TLC5917IPW employs a shift-register topology with 30MHz frequency capability. Both architectures support 8-channel LED driving; the shift-register approach offers additional control flexibility for cascaded applications.

Q: Does the TLC5917IPW support PWM dimming like the AP3608EM-G1?

A: The TLC5917IPW does not specify PWM dimming in its provided parameters. Dimming capability should be verified against the device datasheet for specific application requirements.

Q: Are there thermal or reliability advantages to the TLC5917IPW?

A: The TLC5917IPW supports extended operating temperature range (-40°C to 125°C) compared to the AP3608EM-G1 (-40°C to 85°C), providing improved thermal margin for high-temperature environments. Both devices maintain MSL 1 (Unlimited) moisture sensitivity rating.

Q: What supply voltage considerations apply when switching from AP3608EM-G1 to TLC5917IPW?

A: The TLC5917IPW minimum supply voltage is 3V, lower than the AP3608EM-G1 requirement of 4.2V. Both devices support 5.5V maximum. Existing 4.2V to 5.5V designs are compatible; designs operating below 4.2V require verification of TLC5917IPW performance at lower voltages.