LB11961-W-AH Equivalent & Substitute Parts

Part Overview

The LB11961-W-AH is a brushed DC motor driver IC manufactured by onsemi, designed for fan motor applications. This integrated power management device combines control and power stage functionality in a 14-HSSOP surface mount package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Manufacturer	onsemi
Category	Power Management (PMIC)
Motor Type	Brushed DC
Function	Driver - Fully Integrated, Control and Power Stage
Output Configuration	Half Bridge (2)
Interface	Parallel
Technology	Bipolar
Current - Output	1A
Voltage - Supply	4.5V ~ 16V
Voltage - Load	4.5V ~ 16V
Operating Temperature	-30°C ~ 90°C (TA)
Mounting Type	Surface Mount
Package / Case	14-LSSOP (0.173", 4.40mm Width) + 2 Heat Tabs
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution for the LB11961-W-AH is determined by the following critical parameters:

Parametric Equivalents: Parts that maintain identical electrical specifications and package compatibility. The LB11961-TLM-E qualifies as a parametric equivalent, sharing all key electrical characteristics: 1A output current, 4.5V–16V supply voltage range, half-bridge output configuration, parallel interface, bipolar technology, and identical thermal operating range. Both parts use the 14-HSSOP package with identical mechanical dimensions and heat tab configuration.

Manufacturer Recommended Substitute: The BD6995FV-GE2 from Rohm Semiconductor represents a manufacturer-recommended alternative. While this part differs in several specifications—including higher output current (1.2A), extended supply voltage range (4.3V–17V), wider operating temperature range (-40°C to 105°C), and different interface technology (PWM vs. Parallel)—it maintains the half-bridge output configuration and surface mount form factor. The BD6995FV-GE2 is classified as active product status, ensuring long-term availability.

Parameter Comparison

Parameter	LB11961-W-AH	LB11961-TLM-E	BD6995FV-GE2
Manufacturer	onsemi	onsemi	Rohm Semiconductor
Product Status	Obsolete	Obsolete	Active
Motor Type - AC, DC	Brushed DC	Brushed DC	Brushless DC (BLDC)
Output Configuration	Half Bridge (2)	Half Bridge (2)	Half Bridge (2)
Interface	Parallel	Parallel	PWM
Technology	Bipolar	Bipolar	Bi-CMOS
Current - Output	1A	1A	1.2A
Voltage - Supply	4.5V ~ 16V	4.5V ~ 16V	4.3V ~ 17V
Operating Temperature	-30°C ~ 90°C (TA)	-30°C ~ 90°C (TA)	-40°C ~ 105°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-LSSOP (0.173", 4.40mm Width) + 2 Heat Tabs	14-LSSOP (0.173", 4.40mm Width) + 2 Heat Tabs	16-LSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement: The LB11961-TLM-E provides the most direct substitution path. Both parts are onsemi products with identical electrical and mechanical specifications, ensuring pin-for-pin compatibility and functional equivalence. However, both parts carry obsolete product status, limiting long-term availability.

For Long-Term Availability: The BD6995FV-GE2 is the manufacturer-recommended substitute with active product status, ensuring continued supply. This part requires design evaluation due to differences in interface technology (PWM vs. Parallel), motor type support (BLDC vs. Brushed DC), and package pin count (16-pin vs. 14-pin). The extended operating temperature range (-40°C to 105°C) and improved moisture sensitivity rating (MSL 1) provide enhanced reliability margins. All three parts maintain ROHS3 compliance and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can the LB11961-TLM-E be used as a direct replacement for the LB11961-W-AH?

A: Yes. Both parts share identical electrical specifications, package dimensions, and pin configuration. The LB11961-TLM-E is a parametric equivalent requiring no circuit modifications.

Q: What are the key differences between the LB11961-W-AH and BD6995FV-GE2?

A: The BD6995FV-GE2 differs in interface technology (PWM vs. Parallel), motor type support (BLDC vs. Brushed DC), output current (1.2A vs. 1A), supply voltage range (4.3V–17V vs. 4.5V–16V), operating temperature range (-40°C to 105°C vs. -30°C to 90°C), and package pin count (16 vs. 14). Circuit redesign is required for substitution.

Q: Why is the BD6995FV-GE2 recommended despite these differences?

A: The BD6995FV-GE2 carries active product status, ensuring long-term availability and supply continuity. Both the LB11961-W-AH and LB11961-TLM-E are obsolete, making them unsuitable for new designs or long-term production support.

Q: Are all three parts RoHS compliant?

A: Yes. All three parts are ROHS3 compliant and REACH unaffected, meeting environmental regulatory requirements.

Q: What is the significance of the MSL rating difference?

A: The LB11961-W-AH and LB11961-TLM-E have MSL 3 (168-hour floor life), requiring controlled storage and handling. The BD6995FV-GE2 has MSL 1 (unlimited floor life), eliminating moisture sensitivity constraints and reducing handling complexity.

Q: Can the BD6995FV-GE2 drive brushed DC motors?

A: The BD6995FV-GE2 is specified for brushless DC (BLDC) motor applications. While the half-bridge output configuration is compatible with brushed DC motor topologies, application-specific evaluation is required to confirm functional suitability.

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