My Inquiry
My Account
Analog Devices Inc. LT3760EFE#TRPBF
- Part No.:
- LT3760EFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LT3760EFE#TRPBF.pdf
- Description:
- IC LED DRVR CTRLR PWM 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:880
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3760EFE#TRPBF from Analog Devices (formerly Linear Technology) is an 8-channel, ±2% current-matched LED driver IC with integrated step-up DC/DC controller, capable of driving up to 45V LED strings at 100mA per channel. It features programmable LED current (20–100mA), 3000:1 True Color PWM dimming, and adaptive VOUT regulation for optimal efficiency in automotive backlighting and high-brightness display systems.
For engineers reviewing the LT3760EFE#TRPBF datasheet, LT3760EFE#TRPBF pinout, LT3760EFE#TRPBF application, or LT3760EFE#TRPBF equivalent, key selection criteria include channel current matching tolerance, open-LED fault resilience, programmable thermal derating via TSET, OVPSET-configurable overvoltage protection, and synchronization capability with external clock sources.
Technical Context
The LT3760EFE#TRPBF implements a current-mode boost topology with dual transconductance error amplifiers-one regulating LED string voltage (ensuring ≥1V at each LEDx pin), the other activating only during all-string open faults to clamp VOUT via OVPSET. Its GATE driver delivers ±0.8A peak current to drive external N-channel MOSFETs, while internal soft-start and hiccup-mode overcurrent protection ensure robust startup and fault recovery.
Operation relies on precise sensing at SENSE (52mV typical current-limit threshold) and VC-based peak-current control, with slope compensation for stability above 50% duty cycle. The device supports both analog dimming (CTRL pin, 25:1 range) and high-fidelity PWM dimming (3000:1), with FAULT pin latching open-LED conditions only during PWM high states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Channels | 8 independent constant-current sinks, each programmable 20–100mA via single ISET resistor |
| Current Matching | ±2% max (±0.7% typ) across channels at 40mA - ensures uniform brightness in multi-string displays |
| PWM Dimming Range | 3000:1 True Color PWM™ - preserves color fidelity without low-frequency flicker in video applications |
| Switching Frequency | 100kHz–1MHz, set by RT resistor or synchronized to external clock - enables EMI optimization and compact magnetics |
| VOUT Capability | Up to 60V absolute max; adapts dynamically to LED VF - minimizes power loss and heat in variable-string-length designs |
| OVP Protection | User-programmable via OVPSET pin (e.g., 12.5V or 57V) - prevents LED damage during open-circuit reconnection |
| Junction Temp Range | –40°C to +125°C - qualified for under-hood automotive and industrial ambient environments |
Pinout & Package
LT3760EFE#TRPBF is housed in a thermally enhanced 28-pin TSSOP package (FE grade) with exposed PGND pad (Pin 29) requiring soldering to PCB ground plane for thermal management. Package dimensions: 4.4mm × 9.7mm × 1.1mm, pitch 0.65mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LED1–LED8 (Pins 6–9, 20–23) | Constant-current sink outputs | Each drives LED string cathode; supports paralleling for >100mA/channel; open-LED tolerant |
| VOUT (Pin 18) | Boost converter output node | Supplies anode of all LED strings; regulated to minimum voltage needed to sustain 1V at lowest LEDx pin |
| SENSE (Pin 11) | Inductor current sense input | Connects to source-side sense resistor; sets 52mV current limit threshold for cycle-by-cycle protection |
| GATE (Pin 12) | N-MOSFET gate driver output | ±0.8A peak drive; 30ns rise/fall time into 3300pF - supports fast-switching, low-RDS(on) FETs |
| ISET (Pin 4) | LED current programming input | Resistor-to-GND sets master current (e.g., 14.7kΩ = 40mA); channels track this reference |
| TSET (Pin 2) | Junction temperature breakpoint | Resistor divider from VREF programs thermal derating onset - protects die during sustained high-power operation |
| FAULT (Pin 16) | Open-LED fault flag | Active-low open-drain output; latched during PWM low - enables system-level fault reporting without interrupting active strings |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive VOUT regulation | Maintains only the voltage required to keep the lowest LEDx pin ≥1V - reduces conduction loss and improves system efficiency by up to 8% vs fixed-output boost |
| Programmable thermal derating | TSET pin allows user-defined junction temperature threshold (e.g., 105°C) beyond which LED current scales linearly - prevents thermal runaway in enclosed housings |
| True Color PWM dimming | 3000:1 ratio with no color shift - achieved via precise PWM timing control and zero-crossing switching, critical for medical imaging and broadcast displays |
| Open-LED fault isolation | Single or multiple open strings do not affect regulation or current in remaining channels - ensures uninterrupted backlight operation in safety-critical automotive clusters |
| External clock synchronization | SYNC pin accepts 0.12–1.5MHz external clock - eliminates beat frequencies in multi-driver systems (e.g., large-panel TV backlights) |
Applications
| Automotive Instrument Cluster Backlighting | Notebook Display Backlighting |
|---|---|
Use Scenario: Driving 8 parallel LED strings behind TFT LCD in vehicle instrument panel, operating across –40°C to +105°C ambient. IC Role / Device Role / Timing Role: Constant-current LED driver with adaptive VOUT and open-LED fault tolerance - maintains uniform brightness despite individual string failure. Use Value: Ensures ASIL-B compliant visual integrity; ±2% current matching prevents visible luminance banding across gauge graphics. | Use Scenario: Slim-profile notebook backlight with 8× 100mA LED strings powered from 12V rail, requiring high dimming ratio for battery life extension. IC Role / Device Role / Timing Role: Step-up LED driver with 3000:1 True Color PWM - enables seamless brightness transition from daylight to dark-room use without color distortion. Use Value: Extends battery runtime by >25% vs analog-only dimming; eliminates PWM-induced audio interference in integrated speakers. |
| Industrial HMI Display Lighting | Medical Diagnostic Monitor Backlight |
Use Scenario: Ruggedized human-machine interface with sealed LED array exposed to wide temperature swings and vibration. IC Role / Device Role / Timing Role: Fault-resilient LED controller with programmable OVP and thermal derating - sustains operation during intermittent LED opens or thermal stress. Use Value: Reduces field failures by isolating faults instead of shutting down entire backlight; TSET-based derating extends LED lifetime by 40% at 85°C ambient. | Use Scenario: High-accuracy grayscale medical monitor requiring flicker-free, color-stable illumination for radiology image review. IC Role / Device Role / Timing Role: Precision current-matched LED driver with <±0.7% typical channel matching and 3000:1 PWM - guarantees DICOM-compliant luminance uniformity. Use Value: Eliminates perceptible banding in low-gray-level CT/MRI images; meets IEC 62366 usability requirements for diagnostic clarity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-channel LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3761EFE#TRPBF | Single-channel, higher-current (150mA) version with identical pinout and feature set; lacks multi-channel current matching circuitry | Suitable only when driving one high-current string (e.g., RGB LED) - cannot replace 8-channel architecture | Select LT3760EFE#TRPBF for multi-string uniformity; choose LT3761EFE#TRPBF only for single-string, higher-power needs |
| TPS68400RHAT | 4-channel, 120mA/channel LED driver from TI; uses different topology (buck-boost), no adaptive VOUT, 1000:1 PWM range | Limited channel count and lower dimming ratio - insufficient for full-size automotive cluster or medical display backlighting | Acceptable only for cost-sensitive, lower-performance 4-string applications where ±5% current matching is acceptable |
Compared with LT3760EFE#TRPBF, LT3761EFE#TRPBF offers higher per-channel current but no multi-string coordination, while TPS68400RHAT trades channel count and precision for integration density - neither provides the combination of 8-channel matching, adaptive VOUT, and 3000:1 PWM required for high-end display backlighting.
Availability
LT3760EFE#TRPBF is available at Aetrix Electronics and suitable for automotive instrument clusters, medical diagnostic monitors, and industrial HMI displays requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across temperature extremes.
Supply support for LT3760EFE#TRPBF 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 acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for the LT® product family, including precision analog and power management ICs.
The LT3760EFE#TRPBF belongs to Linear's high-reliability LED driver product line, designed specifically for demanding backlight applications where channel-to-channel current matching, fault resilience, and wide dimming range are critical system requirements.
FAQ
What is the maximum LED string voltage supported by the LT3760EFE#TRPBF?
The LT3760EFE#TRPBF supports up to 45V of LEDs per string, with absolute maximum VOUT rating of 60V. Its adaptive regulation dynamically adjusts VOUT to the minimum voltage required to maintain ≥1V at the lowest LEDx pin, optimizing efficiency across varying forward voltages and temperatures. This capability is confirmed in the Absolute Maximum Ratings table and Typical Application schematic.
How does the LT3760EFE#TRPBF handle open-LED faults without affecting other channels?
The LT3760EFE#TRPBF monitors each LEDx pin voltage independently; if any pin drops below 0.5V (indicating open circuit), the FAULT pin asserts low while continuing regulation on all functional channels. VOUT adapts to remaining strings, and the open channel is ignored in feedback - ensuring uninterrupted operation. This behavior is documented in the Pin Functions section and Operation chapter.
Can the LT3760EFE#TRPBF be synchronized to an external clock, and what is the valid frequency range?
Yes, the LT3760EFE#TRPBF supports external clock synchronization via the SYNC pin. Valid input frequencies range from 0.12MHz to 1.5MHz depending on RT configuration - with RT set for 1MHz operation, SYNC must be ≥1.2MHz. The device requires RT resistor value to be 20% below SYNC frequency for stable locking, as specified in the Electrical Characteristics table.
What thermal derating functionality does the LT3760EFE#TRPBF provide, and how is it configured?
The LT3760EFE#TRPBF provides two-tier thermal protection: junction temperature derating via TSET pin (resistor divider from VREF sets breakpoint) and LED ambient derating via CTRL pin (NTC-based voltage reduction). When die temperature exceeds the TSET threshold, LED current scales linearly to prevent thermal runaway - a feature verified in the Typical Performance Characteristics plots and Applications Information section.
Is the LT3760EFE#TRPBF pin-compatible with other members of the LT3760 family, such as the LT3760IFE#TRPBF?
Yes, the LT3760EFE#TRPBF shares identical pinout, package (28-pin TSSOP), and electrical specifications with the LT3760IFE#TRPBF; the only difference is temperature grade - E-grade is rated for –40°C to +125°C junction, matching the I-grade. Both are drop-in replacements in layout, confirmed in the Order Information table and Pin Configuration diagram.
LT3760EFE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 6V
- Voltage - Supply (Max):
- 40V
- Voltage - Output:
- 6.95V
- Current - Output / Channel:
- 100mA
- Frequency:
- 100kHz ~ 1MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP-EP
LT3760EFE#TRPBF FAQ
1.How can I place an order for LT3760EFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3760EFE#TRPBF 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 LT3760EFE#TRPBF reliable?
The price and inventory of LT3760EFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3760EFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3760EFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3760EFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3760EFE#TRPBF?
LT3760EFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3760EFE#TRPBF 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 LT3760EFE#TRPBF?
For technical support, including LT3760EFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3760EFE#TRPBF requirements.
6.How does Aetrix verify that LT3760EFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3760EFE#TRPBF 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 LT3760EFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3760EFE#TRPBF?
All LT3760EFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3760EFE#TRPBF, 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 LT3760EFE#TRPBF part is unused and in its original packaging.
Return procedure for LT3760EFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3760EFE#TRPBF 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…
