MSL3163BT LED Driver IC Equivalent & Substitute Parts

Part Overview

The MSL3163BT 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 within a 4.75V to 5.5V supply range and is packaged in a 40-TQFN (6x6) form factor. The MSL3163BT carries an Obsolete product status, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	MSL3163BT
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Type	Linear
Number of Outputs	16
Voltage - Supply (Min)	4.75V
Voltage - Supply (Max)	5.5V
Current - Output / Channel	100mA
Dimming	PWM
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	40-WFQFN Exposed Pad
Supplier Device Package	40-TQFN (6x6)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute parts for the MSL3163BT are identified based on the following critical parameters that determine functional equivalence:

Number of Outputs: 16 channels (primary functional requirement)
Operating Temperature Range: -40°C ~ 85°C (TA) (environmental compatibility)
Dimming Capability: PWM or Analog PWM support (control interface compatibility)
Supply Voltage Overlap: Minimum 4.75V to 5.5V operating range
Package Compatibility: Surface mount form factors suitable for backlight applications
RoHS3 Compliance: Regulatory requirement for equivalent parts
Current Output Capability: Minimum 100mA per channel (or higher for margin)

The identified substitutes meet these criteria with varying trade-offs in topology, package form factor, and current output specifications.

Parameter Comparison

Parameter	MSL3163BT (Main)	ATMSL3162BT	TLC59284DBQ
Manufacturer	Microchip Technology	Microchip Technology	Texas Instruments
Type	Linear	AC DC Offline Switcher	Linear
Number of Outputs	16	16	16
Voltage - Supply (Min)	4.75V	4.5V	3V
Voltage - Supply (Max)	5.5V	5.5V	5.5V
Current - Output / Channel	100mA	105mA	45mA
Dimming	PWM	Analog, PWM	—
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	40-WFQFN Exposed Pad	40-WFQFN Exposed Pad	24-SSOP (0.154", 3.90mm Width)
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	2 (1 Year)

Engineering Selection Recommendations

ATMSL3162BT is the primary recommended substitute for the MSL3163BT. Both devices are manufactured by Microchip Technology, share identical 40-TQFN (6x6) packaging, maintain the same operating temperature range, and support 16 output channels. The ATMSL3162BT provides 105mA per channel output, exceeding the MSL3163BT specification of 100mA. The ATMSL3162BT carries Active product status, ensuring long-term availability and supply chain continuity. Both parts maintain ROHS3 compliance and identical MSL ratings. The ATMSL3162BT supports both Analog and PWM dimming modes, providing enhanced control flexibility compared to the PWM-only MSL3163BT.

TLC59284DBQ is a secondary substitute option for applications where package form factor constraints permit a 24-SSOP package. This Texas Instruments device maintains 16 output channels, identical operating temperature range, and ROHS3 compliance. However, the TLC59284DBQ provides 45mA per channel output, which is below the MSL3163BT specification. The TLC59284DBQ does not specify dimming capability in the provided parameters. The device features improved MSL rating (2 versus 3) and broader supply voltage range (3V minimum). This substitute is suitable only for applications with reduced current requirements per channel.

Frequently Asked Questions (FAQ)

Q: Can the ATMSL3162BT directly replace the MSL3163BT in existing designs?

A: The ATMSL3162BT shares identical package form factor (40-TQFN 6x6), pin count (40), operating temperature range (-40°C ~ 85°C), and supply voltage range (4.75V to 5.5V overlap). Both devices support 16 output channels. Pin-level compatibility requires verification against detailed pinout documentation. The ATMSL3162BT's higher current output (105mA versus 100mA) and additional Analog dimming mode provide functional enhancement without degradation.

Q: Why is the TLC59284DBQ listed as a substitute if it provides only 45mA per channel?

A: The TLC59284DBQ meets the core functional criteria of 16-output LED driver operation within the -40°C to 85°C temperature range with ROHS3 compliance. The 45mA per channel specification represents a trade-off suitable for applications with reduced current requirements. This substitute is applicable only when design requirements permit lower per-channel current output.

Q: What is the significance of the package difference between the MSL3163BT and TLC59284DBQ?

A: The MSL3163BT uses a 40-TQFN (6x6) package, while the TLC59284DBQ uses a 24-SSOP package. These are physically distinct form factors requiring different PCB layout and footprint designs. The 24-SSOP package is smaller but accommodates fewer pins. Substitution requires PCB redesign and is not a direct pin-for-pin replacement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. Both the ATMSL3162BT and TLC59284DBQ carry ROHS3 Compliant status, matching the MSL3163BT specification. All three devices meet current regulatory requirements for hazardous substance restrictions.

Q: What is the difference in Moisture Sensitivity Level (MSL) between these devices?

A: The MSL3163BT and ATMSL3162BT both carry MSL 3 rating (168 hours), indicating identical moisture sensitivity and handling requirements. The TLC59284DBQ carries MSL 2 rating (1 year), indicating superior moisture resistance and more relaxed storage and handling conditions. MSL 2 provides operational advantage in humid environments and extended storage scenarios.

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