LTV-3150-L-S Equivalent & Substitute Parts

Part Overview

The LTV-3150-L-S is a 1-channel gate driver optical coupler manufactured by Lite-On Inc., rated for 5000Vrms isolation voltage. This surface mount component operates across -40°C to 105°C and delivers 1A output current with 400ns maximum propagation delay. The part is active in production and ROHS3 compliant.

Substitute parts are identified when equivalent electrical performance can be achieved within the allowed parameter ranges for gate driver optical couplers, including isolation voltage, output current capability, propagation delay, and operating temperature specifications.

Key Parameters

Parameter	LTV-3150-L-S
Manufacturer	Lite-On Inc.
Technology	Optical Coupling
Number of Channels	1
Voltage - Isolation	5000Vrms
Common Mode Transient Immunity (Min)	15kV/µs
Propagation Delay tpLH / tpHL (Max)	400ns / 400ns
Pulse Width Distortion (Max)	120ns
Current - Output High, Low	1A / 1A
Current - Peak Output	1A
Voltage - Output Supply	10V ~ 30V
Operating Temperature	-40°C ~ 105°C
Mounting Type	Surface Mount
Package / Case	8-SMD, Gull Wing
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution logic for the LTV-3150-L-S is based on the following allowed parameters:

Isolation Voltage: Substitute parts must maintain minimum 3750Vrms isolation (lower than 5000Vrms is acceptable for reduced isolation requirements; higher is acceptable)
Output Current: Substitute parts with 2A or 3A peak output current are acceptable for applications requiring equal or greater drive capability
Propagation Delay: Maximum 500ns is acceptable (equal to or greater than the 400ns specification)
Operating Temperature Range: Minimum -40°C to 100°C is acceptable (the LTV-3150-L-S extends to 105°C)
Package Type: 8-SMD or 8-DIP Gull Wing surface mount packages are functionally equivalent
Technology: Optical coupling technology must be maintained
Single Channel: All substitutes must be 1-channel configurations
Compliance: ROHS3 compliance and active product status are required

Substitute parts are grouped into two categories: Broadcom ACPL series (3750Vrms isolation, 2A/2.5A output) and Fairchild/onsemi FOD series (5000Vrms isolation, 2A/3A output).

Parameter Comparison

Parameter	LTV-3150-L-S	ACPL-312U-300E	ACPL-3130-360E	ACPL-J313-500E	ACPL-T350-300E	ACPL-T350-500E	ACPL-T350-560E	FOD3120S	FOD3120SD	FOD3120SDV	FOD3120SV
Manufacturer	Lite-On Inc.	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Fairchild Semiconductor	onsemi	onsemi	Fairchild Semiconductor
Voltage - Isolation	5000Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Common Mode Transient Immunity (Min)	15kV/µs	25kV/µs	40kV/µs	40kV/µs	15kV/µs	15kV/µs	15kV/µs	35kV/µs	35kV/µs	35kV/µs	35kV/µs
Propagation Delay tpLH / tpHL (Max)	400ns / 400ns	500ns / 500ns	500ns / 500ns	500ns / 500ns	500ns / 500ns	500ns / 500ns	500ns / 500ns	400ns / 400ns	400ns / 400ns	400ns / 400ns	400ns / 400ns
Pulse Width Distortion (Max)	120ns	300ns	300ns	300ns	300ns	300ns	300ns	100ns	100ns	100ns	100ns
Current - Output High, Low	1A / 1A	2A / 2A	2A / 2A	2A / 2A	2A / 2A	2A / 2A	2A / 2A	2A / 2A	2A / 2A	2A / 2A	2A / 2A
Current - Peak Output	1A	2.5A	2.5A	2.5A	2.5A	2.5A	2.5A	3A	3A	3A	3A
Voltage - Output Supply	10V ~ 30V	15V ~ 30V	15V ~ 30V	15V ~ 30V	15V ~ 30V	15V ~ 30V	15V ~ 30V	15V ~ 30V	15V ~ 30V	15V ~ 30V	15V ~ 30V
Operating Temperature	-40°C ~ 105°C	-40°C ~ 125°C	-40°C ~ 100°C	-40°C ~ 100°C	-40°C ~ 100°C	-40°C ~ 100°C	-40°C ~ 100°C	-40°C ~ 100°C	-40°C ~ 100°C	-40°C ~ 100°C	-40°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	Not specified
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Broadcom ACPL Series (3750Vrms Isolation)

The ACPL-312U-300E, ACPL-3130-360E, ACPL-J313-500E, ACPL-T350-300E, ACPL-T350-500E, and ACPL-T350-560E are suitable substitutes where isolation voltage can be reduced from 5000Vrms to 3750Vrms. All ACPL variants are ROHS3 compliant and active products. The ACPL-312U-300E extends operating temperature to 125°C and includes AEC-Q100 automotive qualification. ACPL-T350 variants feature faster rise/fall times (15ns/20ns) compared to the LTV-3150-L-S (42ns/50ns). Output current capability increases to 2A/2.5A peak, exceeding the 1A specification of the LTV-3150-L-S. Propagation delay extends to 500ns maximum, acceptable for applications tolerating this increase.

Fairchild/onsemi FOD Series (5000Vrms Isolation)

The FOD3120S, FOD3120SD, FOD3120SDV, and FOD3120SV maintain the 5000Vrms isolation voltage of the LTV-3150-L-S. FOD3120SD and FOD3120SDV are ROHS3 compliant; FOD3120S and FOD3120SV compliance status is not specified. All FOD variants are active products with 3A peak output current and 400ns propagation delay matching the LTV-3150-L-S timing specification. Pulse width distortion improves to 100ns maximum. Common mode transient immunity increases to 35kV/µs. Output supply voltage range is 15V ~ 30V, requiring minimum 15V supply versus the 10V minimum of the LTV-3150-L-S.

Frequently Asked Questions (FAQ)

Q: Can ACPL series parts with 3750Vrms isolation replace the LTV-3150-L-S rated for 5000Vrms?

A: ACPL substitutes are acceptable where system isolation requirements do not exceed 3750Vrms. The lower isolation rating is a trade-off for increased output current (2A/2.5A versus 1A) and improved common mode transient immunity. Applications requiring full 5000Vrms isolation must use FOD series alternatives.

Q: What is the impact of 500ns propagation delay in ACPL parts versus 400ns in the LTV-3150-L-S?

A: The 100ns increase in maximum propagation delay affects gate driver timing margins. Applications with tight timing requirements or high-frequency switching may require timing analysis. FOD series maintains 400ns propagation delay matching the original specification.

Q: Are all substitute parts ROHS3 compliant?

A: ACPL series parts are confirmed ROHS3 compliant. FOD3120SD and FOD3120SDV are ROHS3 compliant; FOD3120S and FOD3120SV do not specify compliance status in the provided data.

Q: What is the minimum supply voltage requirement for substitute parts?

A: The LTV-3150-L-S operates from 10V minimum supply. ACPL and FOD series require 15V minimum supply voltage. Applications operating below 15V cannot use these substitutes.

Q: How do output current capabilities differ between the LTV-3150-L-S and substitutes?

A: The LTV-3150-L-S delivers 1A output current. ACPL series provides 2A continuous and 2.5A peak output. FOD series provides 2A continuous and 3A peak output. Higher output current capability allows driving larger gate loads or multiple gates in parallel.

Q: Are packaging differences between 8-SMD and 8-DIP Gull Wing significant?

A: Both package types are surface mount with identical pin configurations and Gull Wing lead geometry. Footprint and land pattern compatibility must be verified for PCB layout, but electrical functionality is equivalent.

Q: Which substitute offers the best thermal performance?

A: ACPL-312U-300E extends operating temperature to 125°C versus 100°C maximum for other substitutes and 105°C for the LTV-3150-L-S. This part is recommended for high-temperature applications.

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