MSL3164BT LED Driver IC Equivalent & Substitute Parts

Part Overview

The MSL3164BT is a 16-output linear LED driver IC manufactured by Microchip Technology, designed for backlight applications with PWM dimming capability. This device operates at 100mA per channel output with a 5V supply range (4.75V to 5.5V) in a 40-TQFN surface mount package. The MSL3164BT is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

MSL3164BT

Microchip TechnologyIn Stock: 2267MSL3164BT Datasheet

Current PartRFQ

ATMSL3162BT

Microchip TechnologyIn Stock: 860ATMSL3162BT Datasheet

MFR RecommendedRFQ

STP16DPP05TTR

STMicroelectronicsIn Stock: 9722STP16DPP05TTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MSL3164BT is determined by the following critical parameters: 16-output configuration, linear driver topology, PWM dimming capability, 100mA per-channel output current, 5V supply voltage range, surface mount packaging, and automotive-grade operating temperature range (-40°C to 85°C).

Two substitute parts are identified based on these criteria:

ATMSL3162BT (Microchip Technology): Maintains the same 16-output linear architecture, identical package form factor (40-TQFN), and compatible supply voltage range (4.5V to 5.5V). Output current is rated at 105mA per channel, exceeding the original 100mA specification. This part supports both analog and PWM dimming modes and is currently in active production status.

STP16DPP05TTR (STMicroelectronics): Provides 16-output linear driver functionality with shift register topology. Supply voltage range spans 3V to 5.5V, offering broader input compatibility. Output current is rated at 40mA per channel, which is lower than the original specification. Package form factor differs (24-TSSOP versus 40-TQFN), requiring PCB layout modification. This part is in active production status with extended operating temperature range (-40°C to 125°C).

Parameter Comparison

Engineering Selection Recommendations

ATMSL3162BT is the primary substitute for direct replacement applications. This part maintains identical package geometry (40-TQFN), matching supply voltage specifications, and equivalent operating temperature range. The 105mA per-channel output current exceeds the original 100mA requirement, providing design margin. Active production status ensures long-term availability and supply chain stability. No PCB layout modifications are required.

STP16DPP05TTR serves as an alternative for applications where package form factor change is acceptable. This part is in active production with extended temperature range capability (-40°C to 125°C). However, the 40mA per-channel output current is significantly lower than the original 100mA specification, limiting applicability to lower-power LED configurations. The 24-TSSOP package requires PCB redesign and layout changes compared to the original 40-TQFN footprint.

Both substitute parts maintain ROHS3 compliance and automotive-grade certifications consistent with the original MSL3164BT specifications.

Frequently Asked Questions (FAQ)

Q: Can ATMSL3162BT be used as a direct drop-in replacement for MSL3164BT?

A: Yes. ATMSL3162BT maintains the same 40-TQFN package footprint, supply voltage range (4.5V to 5.5V overlaps with 4.75V to 5.5V), and 16-output configuration. The 105mA per-channel output current exceeds the original 100mA specification. No PCB layout modifications are required.

Q: What are the limitations of STP16DPP05TTR as a substitute?

A: STP16DPP05TTR has two primary limitations: output current is rated at 40mA per channel, which is 60% lower than the original 100mA specification, and the package form factor is 24-TSSOP instead of 40-TQFN, requiring PCB redesign. This part is suitable only for applications with reduced LED current requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. Both ATMSL3162BT and STP16DPP05TTR are ROHS3 compliant, matching the original MSL3164BT compliance status.

Q: What is the key difference between linear and AC DC offline switcher topologies?

A: ATMSL3162BT is classified as an AC DC offline switcher with step-down and step-up capability, while MSL3164BT is a linear driver. Linear drivers dissipate excess voltage as heat, while switcher topologies use frequency conversion for efficiency. Both topologies support the required 16-output, PWM-dimming LED driver functionality.

Q: Does package change affect thermal performance?

A: Yes. The 40-TQFN package (6x6mm) has different thermal characteristics than the 24-TSSOP package. Thermal analysis is required if STP16DPP05TTR is selected as a substitute to ensure adequate heat dissipation for the application.

Q: Are dimming control methods compatible between substitutes?

A: MSL3164BT supports PWM dimming. ATMSL3162BT supports both analog and PWM dimming, providing backward compatibility. STP16DPP05TTR uses shift register control, which differs from PWM dimming and requires firmware or control circuit modification.