LP8556TMX-E07/NOPB LED Driver IC Equivalent & Substitute Parts

Part Overview

The LP8556TMX-E07/NOPB is a 6-output LED driver IC manufactured by Texas Instruments, functioning as a step-up (boost) DC-DC regulator with integrated PWM and I2C dimming control. This component is designed for backlight applications requiring multiple regulated output channels from a low input voltage source. The part is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when design requirements necessitate alternative packaging formats, higher output current capacity, different supply voltage ranges, or when primary part availability is constrained. The following equivalent and similar parts maintain core functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

LP8556TMX-E07/NOPB

Texas InstrumentsIn Stock: 3979LP8556TMX-E07/NOPB Datasheet

Current PartRFQ

LP8556TMX-E11/NOPB

Texas InstrumentsIn Stock: 9360LP8556TMX-E11/NOPB Datasheet

Parametric EquivalentRFQ

BD9397EFV-GE2

Rohm SemiconductorIn Stock: 2756BD9397EFV-GE2 Datasheet

SimilarRFQ

ISL97636AIRZ-TK

Renesas Electronics CorporationIn Stock: 5193ISL97636AIRZ-TK Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP8556TMX-E07/NOPB are classified into two categories based on parametric alignment:

Parametric Equivalent: LP8556TMX-E11/NOPB maintains identical electrical specifications across all critical parameters including supply voltage range (2.7V - 20V), output voltage range (7V - 43V), output current per channel (50mA), number of outputs (6), switching frequency options (312kHz, 625kHz, 1250kHz), dimming control methods (I2C, PWM), and operating temperature range (-30°C ~ 85°C). The primary difference is packaging format: LP8556TMX-E11/NOPB is supplied in Tape & Reel (TR) format versus the prototype packaging of the main part. Both utilize the 20-DSBGA package footprint (2.04x1.78mm).

Similar Parts: BD9397EFV-GE2 (Rohm Semiconductor) and ISL97636AIRZ-TK (Renesas Electronics Corporation) provide functional substitution with parameter variations. These parts share the 6-output boost regulator topology and backlight application focus but differ in supply voltage ranges, output current capacity, package types, and product status.

Substitution eligibility is determined by matching the following core parameters:

• Topology: Step-Up (Boost) DC-DC Regulator
• Number of Outputs: 6
• Internal Switch(s): Yes
• Dimming Capability: I2C and/or PWM
• Applications: Backlight
• RoHS3 Compliance: Required

Parameter Comparison

Engineering Selection Recommendations

LP8556TMX-E11/NOPB (Parametric Equivalent): This part is the direct parametric equivalent to LP8556TMX-E07/NOPB with identical electrical specifications and operating characteristics. Selection of LP8556TMX-E11/NOPB is appropriate when Tape & Reel packaging format is required for automated assembly processes. Both parts maintain Active product status, ROHS3 compliance, and MSL 1 rating. No electrical redesign is necessary for this substitution. The 20-DSBGA footprint remains identical, ensuring PCB layout compatibility.

BD9397EFV-GE2 (Rohm Semiconductor): This part functions as a 6-output boost regulator for backlight applications with higher output current capacity (400mA per channel versus 50mA). Selection is appropriate when higher LED current drive is required. However, this part operates with a higher minimum supply voltage (9V versus 2.7V) and different switching frequency (500kHz fixed). The package format differs significantly (40-HTSSOP-B versus 20-DSBGA), requiring PCB layout redesign. Dimming control is limited to Analog and PWM (no I2C). MSL rating is 3 (168 Hours), requiring stricter moisture handling. Product status is Active with ROHS3 compliance.

ISL97636AIRZ-TK (Renesas Electronics Corporation): This part is classified as Obsolete product status and is not recommended for new designs. While it maintains 6-output boost regulator topology with PWM dimming for backlight applications, the obsolete classification indicates discontinued manufacturing and limited future availability. Output current per channel (35mA) is lower than the main part (50mA). Supply voltage range (6V - 24V) differs from LP8556TMX-E07/NOPB (2.7V - 20V). Package format is 24-QFN (4x4), requiring PCB redesign. MSL rating is 3 (168 Hours).

Selection Priority: For direct replacement with no design changes, use LP8556TMX-E11/NOPB. For applications requiring higher output current and accepting supply voltage constraints, evaluate BD9397EFV-GE2. Avoid ISL97636AIRZ-TK due to obsolete status.

Frequently Asked Questions (FAQ)

Q: Can LP8556TMX-E11/NOPB be used as a direct drop-in replacement for LP8556TMX-E07/NOPB?

A: Yes. LP8556TMX-E11/NOPB is a parametric equivalent with identical electrical specifications, operating temperature range, output voltage range, supply voltage range, output current per channel, switching frequency options, and dimming control methods. The primary difference is packaging format (Tape & Reel versus prototype packaging). Both use the same 20-DSBGA footprint (2.04x1.78mm), ensuring PCB compatibility without layout modifications.

Q: What are the key differences between LP8556TMX-E07/NOPB and BD9397EFV-GE2?

A: BD9397EFV-GE2 differs in multiple parameters: (1) Output current per channel is 400mA versus 50mA, (2) Minimum supply voltage is 9V versus 2.7V, (3) Maximum supply voltage is 35V versus 20V, (4) Switching frequency is fixed at 500kHz versus selectable 312kHz/625kHz/1250kHz, (5) Dimming control is Analog and PWM only (no I2C), (6) Package is 40-HTSSOP-B versus 20-DSBGA, requiring PCB redesign, (7) MSL rating is 3 (168 Hours) versus 1 (Unlimited). Selection of BD9397EFV-GE2 requires circuit redesign and is appropriate only when higher output current is necessary.

Q: Why is ISL97636AIRZ-TK listed as a substitute if it is obsolete?

A: ISL97636AIRZ-TK is included in the substitute list based on the provided input data, which identifies it as a similar part. However, its Obsolete product status indicates discontinued manufacturing. This part is not recommended for new designs due to limited availability and potential supply chain constraints. Existing designs using ISL97636AIRZ-TK should transition to LP8556TMX-E07/NOPB or LP8556TMX-E11/NOPB for long-term reliability.

Q: Are there any moisture sensitivity or handling differences between these parts?

A: Yes. LP8556TMX-E07/NOPB and LP8556TMX-E11/NOPB both have MSL 1 (Unlimited) rating, allowing indefinite shelf life without moisture exposure controls. BD9397EFV-GE2 and ISL97636AIRZ-TK both have MSL 3 (168 Hours) rating, requiring storage in dry conditions and limiting shelf life to 168 hours after moisture exposure. If moisture-sensitive handling is a constraint, LP8556TMX-E07/NOPB or LP8556TMX-E11/NOPB are preferred.

Q: Can I use BD9397EFV-GE2 in a design originally specified for LP8556TMX-E07/NOPB without circuit modifications?

A: No. BD9397EFV-GE2 requires circuit redesign due to: (1) Different package footprint (40-HTSSOP-B versus 20-DSBGA), requiring new PCB layout, (2) Different supply voltage range (9V minimum versus 2.7V minimum), requiring power supply adjustments, (3) Different dimming control interface (Analog/PWM only versus I2C/PWM), requiring firmware or control circuit modifications, (4) Different switching frequency (fixed 500kHz versus selectable), affecting filter component selection. Full electrical and layout redesign is necessary.

Q: What is the significance of the 20-DSBGA package specification (2.04x1.78)?

A: The 20-DSBGA (Die Size Ball Grid Array) package with dimensions 2.04mm x 1.78mm specifies the physical footprint and pin configuration. This compact package is suitable for space-constrained backlight driver applications. Both LP8556TMX-E07/NOPB and LP8556TMX-E11/NOPB use this identical package, ensuring PCB layout compatibility. Substitute parts using different packages (BD9397EFV-GE2 in 40-HTSSOP-B or ISL97636AIRZ-TK in 24-QFN) require new PCB designs.

Q: Are all listed parts RoHS3 compliant?

A: Yes. LP8556TMX-E07/NOPB, LP8556TMX-E11/NOPB, BD9397EFV-GE2, and ISL97636AIRZ-TK are all ROHS3 Compliant, meeting environmental and hazardous substance restrictions. All parts are suitable for applications requiring RoHS compliance.

Q: What is the difference between I2C and PWM dimming control?

A: Both LP8556TMX-E07/NOPB and LP8556TMX-E11/NOPB support I2C (Inter-Integrated Circuit) and PWM (Pulse Width Modulation) dimming. I2C provides digital communication-based brightness control, while PWM provides analog brightness control via duty cycle modulation. BD9397EFV-GE2 supports Analog and PWM dimming only (no I2C). ISL97636AIRZ-TK supports PWM dimming only. If I2C control is required, only LP8556TMX-E07/NOPB or LP8556TMX-E11/NOPB are suitable.