My Inquiry
My Account
Analog Devices Inc. LT8374RUFM#WTRPBF
- Part No.:
- LT8374RUFM#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
LT8374RUFM#WTRPBF.pdf
- Description:
- 60V 1A SIMPLE LED DRIVER - 330KH
- Quantity:
- Payment:
- Shipping:
Inventory:4,569
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8374RUFM#WTRPBF from Analog Devices is a 60V, 1.2A monolithic synchronous step-down LED driver IC with fixed-frequency peak-current control, ±3% LED current regulation, and AEC-Q100 qualification for automotive matrix lighting. It supports analog (250mV–1.25V), duty-cycle (12.5%–62.5%), or PWM (100Hz–200kHz) LED current programming via the CTRL pin and operates across 6.5V–60V input voltage range.
For engineers reviewing the LT8374RUFM#WTRPBF datasheet, LT8374RUFM#WTRPBF pinout, LT8374RUFM#WTRPBF application, or LT8374RUFM#WTRPBF equivalent, key selection considerations include its 330kHz/2MHz selectable switching frequency, spread-spectrum EMI reduction, internal 0.2nF/0.9nF compensation options, 0V–59V LED string voltage capability, and side-solderable 4mm × 4mm QFN-16 package with exposed thermal pad.
Technical Context
The LT8374RUFM#WTRPBF integrates dual power switches, a peak-current mode controller, and a high-accuracy 20µA CTRL pin current source to regulate LED current via ISP/ISN differential sensing. Its current sense amplifier features 0V–VIN common-mode range, enabling high-side or low-side sense placement in matrix configurations.
Switching frequency is internally set to 330kHz (LT8374) or 2MHz (LT8374-1); the LT8374RUFM#WTRPBF variant uses 330kHz. The SYNC/SPRD pin enables external synchronization or spread-spectrum modulation (100%–125% frequency variation), while CAP pin selection configures internal compensation (0.2nF or 0.9nF) without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.5V to 60V - supports 12V/24V/48V automotive battery rails and wide industrial inputs |
| LED Current Accuracy | ±3% - tight regulation ensures consistent brightness across temperature and line variations |
| Switching Frequency | 330kHz - fixed internal frequency reduces design complexity; enables compact magnetics |
| Max LED String Voltage | 0V to 59V - accommodates multi-string matrix topologies with high forward-voltage LEDs |
| CTRL Interface Modes | Analog (250mV–1.25V), duty-cycle (12.5%–62.5%), or PWM (100Hz–200kHz) - flexible dimming and current setting |
| Package | 16-pin 4mm × 4mm side-solderable QFN with exposed GND pad - optimized for thermal performance in space-constrained automotive PCBs |
| AEC-Q100 Grade | Grade 1 (–40°C to +150°C TJ) - qualified for under-hood and headlamp applications |
Pinout & Package
LT8374RUFM#WTRPBF is housed in a 16-pin, 4mm × 4mm plastic QFN package with side-wettable flanks and an exposed thermal pad (Pin 17) that must be soldered to PCB ground for thermal and electrical integrity. θJA = 32°C/W measured on EVAL-LT8374-AZ.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC/SPRD (1) | Synchronization & SSFM control | Open or tied to INTVCC enables spread-spectrum EMI reduction; driven at 330kHz for sync; tie to GND when unused |
| FB (2) | Voltage regulation feedback | Compares against 1.04V reference; resistor from ISP to FB sets output voltage limit to prevent LED overvoltage |
| ISP (3) | Positive current sense input | Connects to high-side of external sense resistor; enables 0V–VIN common-mode sensing for matrix flexibility |
| ISN (4) | Negative current sense input | Connects to low-side of sense resistor; differential pair with ISP provides accurate LED current feedback |
| CTRL (5) | LED current programming interface | 20µA current source allows resistor-based analog control; accepts PWM/duty-cycle signals for dimming |
| CAP (6) | Internal compensation selection | GND selects 0.2nF/19kΩ network; float selects 0.9nF/27kΩ; INTVCC disables internal compensation |
| VC (7) | Loop compensation node | Connect external capacitor to GND for stability; float when using internal compensation networks |
| GND (8,11,17) | Ground terminals | Pins 8/11 are signal GND; Pin 17 is exposed thermal pad - all must connect to solid ground plane |
| AVIN (9) | Analog supply input | Separate 6.5V–60V rail for precision analog circuitry; improves thermal performance vs. shared VIN |
| INTVCC (10) | Internally regulated supply | Provides gate drive for power switches; bypass with 2.2µF ceramic capacitor to GND |
| VIN (12) | Main power input | Supplies inductor current during high-side switch conduction; requires local 0.47µF ceramic bypass |
| BST (13) | Bootstrap supply | Charged via internal diode from INTVCC to SW; requires 22nF capacitor to SW for high-side driver |
| SW (14,15,16) | Power switch node | Internally connected pins driving external inductor; switch between VIN and GND at 330kHz |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | 6.5V–60V operation supports 12V/24V/48V automotive systems and industrial DC supplies without pre-regulation |
| Matrix-optimized current sensing | 0V–VIN common-mode range on ISP/ISN enables flexible high-side, low-side, or floating LED string configurations |
| Integrated spread-spectrum modulation | Reduces peak EMI by spreading 330kHz fundamental across ±25% bandwidth - simplifies EMC compliance |
| Dual internal compensation options | Selectable 0.2nF or 0.9nF networks eliminate external compensation components in most designs |
| Robust short-circuit protection | Recovery current threshold (0.5A) and extended off-time prevent inductor saturation during LED short conditions |
| AEC-Q100 automotive qualification | Rated for –40°C to +150°C junction temperature - validated for headlamp, DRL, and adaptive front-lighting systems |
Applications
| Automotive Adaptive Headlamps | Commercial Vehicle Matrix Lighting |
|---|---|
Use Scenario: Dynamic beam shaping in LED headlamps with individually addressable segments for glare-free high-beam and cornering functions. IC Role / Device Role / Timing Role: Primary LED current regulator per segment, providing precise ±3% current control across temperature and input voltage variations. Use Value: Enables pixel-level brightness uniformity and fast dimming response (<100ns CTRL pin settling) required for real-time beam adaptation. |
Use Scenario: High-reliability, multi-string LED lighting for truck cab roof bars and trailer marker lights operating in harsh vibration and thermal environments. IC Role / Device Role / Timing Role: Synchronous buck controller delivering 1.2A per channel with integrated thermal shutdown and UVLO protection. Use Value: Eliminates need for external current sense amplifiers and gate drivers - reduces BOM count and improves system MTBF. |
| Industrial Machine Vision Illumination | Architectural LED Signage |
Use Scenario: Stroboscopic high-intensity LED arrays synchronized to camera exposure timing for defect inspection on production lines. IC Role / Device Role / Timing Role: Fast-response LED driver accepting external PWM trigger at CTRL pin with 100Hz–200kHz support and <1% duty cycle capability. Use Value: Delivers sub-millisecond current rise/fall times and stable current during brief strobe pulses - critical for motion-blur-free imaging. |
Use Scenario: Large-format outdoor LED displays requiring long-string operation (up to 59V) and consistent luminance across variable ambient temperatures. IC Role / Device Role / Timing Role: Constant-current sink regulating up to 1A per string with programmable voltage limit to protect against open-circuit failure modes. Use Value: Maintains ±3% current accuracy from –40°C to +85°C ambient - ensures color consistency and prevents thermal runaway in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8374RUFM-1#WTRPBF | 2MHz switching frequency vs. 330kHz; identical pinout, package, and feature set | Better suited for ultra-compact designs requiring smaller inductors/capacitors; higher switching loss at high current | Select LT8374RUFM-1#WTRPBF when board area is constrained and thermal management supports 2MHz operation |
| LM3409QMY/NOPB | Adjustable 100kHz–1MHz frequency; no internal compensation; requires external current sense amp for matrix use | Lacks 0V–VIN ISP/ISN common-mode range and spread-spectrum EMI reduction; not AEC-Q100 qualified | Choose LM3409QMY/NOPB only for cost-sensitive non-automotive applications where EMI and matrix topology are not requirements |
Compared with LT8374RUFM-1#WTRPBF, the LT8374RUFM#WTRPBF offers lower switching losses and relaxed EMI filtering at 330kHz, while LM3409QMY/NOPB requires additional components to match basic functionality and lacks automotive qualification - making LT8374RUFM#WTRPBF the optimal choice for AEC-Q100-compliant matrix lighting.
Availability
LT8374RUFM#WTRPBF is available at Aetrix Electronics and suitable for automotive adaptive lighting, commercial vehicle matrix systems, and industrial machine vision illumination requiring stable component supply, AEC-Q100 traceability, and long-term production continuity.
Supply support for LT8374RUFM#WTRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets with precision power, signal chain, and timing solutions.
The LT8374 product line delivers monolithic synchronous LED drivers optimized for automotive-grade matrix lighting, featuring integrated current sensing, spread-spectrum EMI control, and AEC-Q100 qualification - designed specifically for adaptive front-lighting and high-reliability LED applications.
FAQ
What is the switching frequency of the LT8374RUFM#WTRPBF?
The LT8374RUFM#WTRPBF operates at a fixed internal switching frequency of 330kHz. This frequency is not user-adjustable but can be synchronized to an external 330kHz clock via the SYNC/SPRD pin. Spread-spectrum modulation shifts this frequency between 330kHz and 412.5kHz to reduce EMI peaks. The LT8374RUFM#WTRPBF does not support the 2MHz option - that is exclusive to the LT8374RUFM-1#WTRPBF variant.
How is LED current programmed on the LT8374RUFM#WTRPBF?
LED current on the LT8374RUFM#WTRPBF is programmed via the CTRL pin using one of three methods: (1) analog DC voltage (250mV–1.25V), (2) digital duty-cycle signal (12.5%–62.5%), or (3) PWM dimming (100Hz–200kHz). An internal 20µA current source allows resistor-based voltage setting - e.g., a 37.4kΩ resistor to GND yields 748mV, corresponding to ~500mA LED current with a 100mΩ sense resistor. The LT8374RUFM#WTRPBF supports full 20:1 current control range.
Does the LT8374RUFM#WTRPBF support matrix LED configurations?
Yes, the LT8374RUFM#WTRPBF is explicitly designed for matrix LED lighting. Its ISP and ISN pins support a 0V–VIN common-mode input range, allowing the current sense resistor to be placed on either the high-side or low-side of the LED string - essential for multi-string, individually controlled architectures. This eliminates the need for level-shifting amplifiers and enables direct connection to microcontroller GPIOs for segment enable/disable control.
What package type and thermal characteristics does the LT8374RUFM#WTRPBF have?
The LT8374RUFM#WTRPBF uses a 16-pin, 4mm × 4mm plastic QFN package with side-wettable flanks and an exposed thermal pad (Pin 17). Measured on the EVAL-LT8374-AZ board, its thermal resistance is θJA = 32°C/W. The exposed pad must be soldered to a PCB ground plane for both thermal dissipation and electrical stability. This package meets IPC/JEDEC J-STD-609 lead-free finish standards and supports automated optical inspection (AOI) of solder joints.
Is the LT8374RUFM#WTRPBF qualified for automotive applications?
Yes, the LT8374RUFM#WTRPBF is AEC-Q100 qualified for automotive applications (Grade 1, –40°C to +150°C junction temperature). It is manufactured under controlled automotive processes, with reliability reports available through Analog Devices' automotive sales channel. The "#W" suffix in the part number denotes automotive-grade qualification - standard versions (e.g., LT8374RUFM#PBF) are not AEC-Q100 certified and should not be used in automotive systems.
LT8374RUFM#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 6.5V
- Voltage - Supply (Max):
- 60V
- Voltage - Output:
- 0V ~ 59V
- Current - Output / Channel:
- 1.2A
- Frequency:
- 300kHz
- Dimming:
- Analog, PWM
- Applications:
- General Purpose
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 16-QFN (4x4)
LT8374RUFM#WTRPBF FAQ
1.How can I place an order for LT8374RUFM#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8374RUFM#WTRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT8374RUFM#WTRPBF reliable?
The price and inventory of LT8374RUFM#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8374RUFM#WTRPBF is usually 5 days.
3.What payment methods are accepted for LT8374RUFM#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8374RUFM#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8374RUFM#WTRPBF?
LT8374RUFM#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8374RUFM#WTRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT8374RUFM#WTRPBF?
For technical support, including LT8374RUFM#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8374RUFM#WTRPBF requirements.
6.How does Aetrix verify that LT8374RUFM#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LT8374RUFM#WTRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT8374RUFM#WTRPBF meets industry standards.
7.What is the process for return or replacement of LT8374RUFM#WTRPBF?
All LT8374RUFM#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8374RUFM#WTRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT8374RUFM#WTRPBF part is unused and in its original packaging.
Return procedure for LT8374RUFM#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8374RUFM#WTRPBF Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
