TPA3136D2PWPR Equivalent & Substitute Parts

Part Overview

The TPA3136D2PWPR is an active Class D stereo amplifier integrated circuit manufactured by Texas Instruments. This device delivers 10W per channel at 8Ω load across two independent channels, operating from a 4.5V to 14.4V supply. The component is housed in a 28-pin HTSSOP surface mount package and includes integrated protection features for depop, short-circuit, and thermal conditions. The part maintains Active product status with 45,200 units in current inventory. Equivalent and substitute parts are identified based on matching functional output specifications, electrical operating parameters, and mechanical compatibility within the Class D stereo amplifier category.

Key Parameters

Parameter	Value
Amplifier Type	Class D
Channel Configuration	2-Channel (Stereo)
Output Power per Channel @ 8Ω	10W
Supply Voltage Range	4.5V ~ 14.4V
Operating Temperature Range	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package Type	28-pin HTSSOP
Protection Features	Depop, Short-Circuit, Thermal
RoHS Compliance	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the TPA3136D2PWPR are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Amplifier topology: Class D configuration
Channel count: 2-Channel (Stereo) output
Output power specification: 10W per channel at 8Ω load
Operating temperature range: -40°C ~ 85°C (TA)
Surface mount technology
RoHS3 compliance and regulatory alignment

Secondary Compatibility Factors:

Supply voltage operating range (must support the application requirements)
Package form factor (different packages acceptable if pin-compatible or functionally equivalent)
Protection feature set (short-circuit protection required; depop and thermal protection enhance compatibility)
Moisture sensitivity level and storage requirements

The RT9118GQW qualifies as a substitute based on matching Class D stereo amplifier topology, identical 10W per channel output at 8Ω, matching operating temperature range, and equivalent regulatory compliance. Package differences (28-WQFN versus 28-HTSSOP) require PCB layout redesign but do not affect electrical functionality.

Parameter Comparison

Parameter	TPA3136D2PWPR	RT9118GQW	Compatibility
Manufacturer	Texas Instruments	Richtek USA Inc.	Different manufacturers
Amplifier Type	Class D	Class D	Matched
Channel Configuration	2-Channel (Stereo)	2-Channel (Stereo)	Matched
Output Power @ 8Ω	10W x 2	10W x 2	Matched
Supply Voltage Range	4.5V ~ 14.4V	8V ~ 17V	Partial overlap (8V ~ 14.4V)
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	Matched
Mounting Type	Surface Mount	Surface Mount	Matched
Package Type	28-HTSSOP	28-WQFN (4x5)	Different packages
Short-Circuit Protection	Yes	Yes	Matched
Thermal Protection	Yes	Not specified	TPA3136D2PWPR has additional feature
Depop Protection	Yes	Not specified	TPA3136D2PWPR has additional feature
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched
MSL Rating	3 (168 Hours)	3 (168 Hours)	Matched
Product Status	Active	Active	Matched

Engineering Selection Recommendations

TPA3136D2PWPR Selection Criteria:

Primary choice for applications requiring depop protection in addition to thermal and short-circuit protection
Preferred when supply voltage range extends below 8V (minimum 4.5V operation)
Recommended for designs already utilizing 28-HTSSOP package footprints
Suitable for high-volume production with 45,200 units in current inventory

RT9118GQW Selection Criteria:

Acceptable substitute when depop protection is not required by the application
Suitable for applications with supply voltage minimum of 8V or higher
Required when 28-WQFN (4x5) package footprint is specified or preferred
Alternative source when TPA3136D2PWPR availability is constrained (1,759 units in inventory)

Substitution Feasibility: Both parts maintain Active product status and ROHS3 compliance. Electrical substitution is valid when supply voltage specifications align with the RT9118GQW minimum of 8V. Package substitution requires PCB redesign due to different form factors (HTSSOP versus WQFN). The absence of specified depop and thermal protection features in the RT9118GQW datasheet parameters does not preclude substitution in applications where these protections are not mandatory.

Frequently Asked Questions (FAQ)

Q: Can the RT9118GQW directly replace the TPA3136D2PWPR on an existing PCB?

A: Direct PCB replacement is not possible due to different package types (28-HTSSOP versus 28-WQFN). The RT9118GQW requires PCB layout redesign and new footprint implementation. Electrical functionality is compatible when supply voltage specifications align.

Q: What is the minimum supply voltage difference between these parts?

A: The TPA3136D2PWPR operates from 4.5V minimum, while the RT9118GQW operates from 8V minimum. Applications requiring operation below 8V must use the TPA3136D2PWPR.

Q: Are both parts suitable for the same thermal management requirements?

A: The TPA3136D2PWPR includes specified thermal protection. The RT9118GQW thermal protection status is not specified in the provided parameters. Thermal design verification is necessary when substituting to the RT9118GQW.

Q: What protection features differ between these amplifiers?

A: The TPA3136D2PWPR includes depop, short-circuit, and thermal protection. The RT9118GQW specifies short-circuit protection. Depop and thermal protection features are not listed for the RT9118GQW in the provided data.

Q: Are both parts RoHS compliant?

A: Yes, both the TPA3136D2PWPR and RT9118GQW are ROHS3 compliant with matching MSL ratings of 3 (168 Hours).

Q: Which part should be selected for new designs?

A: Selection depends on specific application requirements. If depop protection or sub-8V operation is required, use TPA3136D2PWPR. If 28-WQFN package is mandated and supply voltage is 8V or higher, RT9118GQW is acceptable. Both parts maintain Active status and current inventory availability.

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