My Inquiry
My Account
Analog Devices Inc. LT3760IFE#PBF
- Part No.:
- LT3760IFE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LT3760IFE#PBF.pdf
- Description:
- IC LED DRVR CTRLR PWM 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:250
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3760IFE#PBF from Analog Devices (formerly Linear Technology) is an 8-channel, ±2% current-matched LED driver with integrated step-up DC/DC controller, capable of driving up to 45V per LED string 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 LT3760IFE#PBF datasheet, LT3760IFE#PBF pinout, LT3760IFE#PBF application, or LT3760IFE#PBF equivalent, key selection criteria include channel current matching accuracy, open-LED fault tolerance, thermal derating capability via TSET, and synchronization support for EMI-sensitive designs.
Technical Context
The LT3760IFE#PBF implements a current-mode boost topology with dual transconductance error amplifiers-one regulating LED current by maintaining minimum 1V at each LEDx pin, the other enabling programmable overvoltage protection (OVP) when all strings open. Its VC pin controls peak inductor current and duty cycle, while slope compensation ensures stability above 50% duty.
It integrates a 7V INTVCC LDO for gate drive, a precision 1.485V VREF for external resistor programming, and independent analog (CTRL) and PWM dimming paths. Fault detection includes open-LED flagging (FAULT pin), LED-to-VOUT short protection, and hiccup-mode overcurrent recovery.
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% typical) across channels at 40mA - enables uniform brightness without per-string calibration |
| PWM Dimming Range | 3000:1 True Color PWM™ - preserves color fidelity at ultra-low duty cycles for high-end displays |
| Switching Frequency | 100kHz–1MHz, set by RT resistor or synchronized to external clock - supports EMI optimization and compact magnetics |
| OVP Protection | User-programmable via OVPSET pin (e.g., 12.5V to 57V) - prevents LED damage during reconnection after open-circuit faults |
| Junction Temp Range | –40°C to +125°C - validated for automotive cabin and industrial ambient conditions |
| VOUT Rating | 60V absolute max - supports up to 45V LED string voltage with headroom for transient margin |
Pinout & Package
LT3760IFE#PBF is housed in a thermally enhanced 28-pin plastic TSSOP package (FE) with exposed PGND pad (Pin 29) requiring soldering to PCB ground plane for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LED1–LED8 (Pins 6–9, 20–23) | Constant-current sink outputs | Each drives LED string cathode; 1V compliance voltage ensures regulation even when PVIN > VOUT |
| VOUT (Pin 18) | Boost converter output | Supplies common anode voltage for all 8 LED strings; adapts dynamically to lowest VF string for efficiency |
| ISET (Pin 4) | LED current programming input | Resistor to GND sets master current (20–100mA); enables channel paralleling for >100mA per string |
| CTRL (Pin 1) | Analog dimming & thermal derating control | Voltage <1V linearly scales LED current; negative TC resistor divider enables automatic current reduction vs. temperature |
| TSET (Pin 2) | Junction temperature breakpoint | Resistor divider from VREF programs die temp threshold beyond which LED current derates |
| FAULT (Pin 16) | Open-LED fault indicator | Active-low open-drain flag updated only during PWM high - avoids false triggers during dimming off-time |
| SYNC (Pin 17) | External clock input | Accepts 120kHz–1.5MHz clock; RT resistor must be set 20% below sync frequency for stable locking |
| PGND (Pins 10, 19, 29) | Power ground return path | Exposed pad (Pin 29) is primary thermal path - must be soldered to solid copper area for θJC = 10°C/W |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive VOUT regulation | VOUT automatically tracks the minimum required voltage across active LED strings - reduces power loss and heat generation |
| True Color PWM™ dimming | 3000:1 ratio with no color shift - achieved via precise timing control and fast channel enable/disable |
| Programmable LED current derating | Two independent derating paths: one via CTRL pin (ambient LED temp), one via TSET pin (IC junction temp) |
| Open-LED fault isolation | Non-faulty channels continue operation unaffected; FAULT pin asserts only when ≥1 string opens |
| Internal soft-start & hiccup mode | Gradual VC ramp-up on startup; MOSFET disabled for ~2ms after overcurrent - protects external FET during fault recovery |
Applications
| Automotive Display Backlighting | Notebook LCD Backlighting |
|---|---|
Use Scenario: Driving 8 parallel LED strings behind TFT-LCD in instrument cluster or center console under wide temperature (-40°C to +105°C ambient). IC Role / Device Role / Timing Role: Constant-current LED driver with adaptive VOUT and open-LED fault reporting for system diagnostics. Use Value: ±2% current matching ensures uniform luminance across display zones; 3000:1 PWM enables seamless day/night brightness transition without color washout. | Use Scenario: Powering slim-profile edge-lit LED arrays in 13–15" notebooks with strict EMI limits and thermal constraints. IC Role / Device Role / Timing Role: Synchronized boost LED driver with programmable frequency to avoid noise in audio band. Use Value: SYNC pin allows locking to system clock, eliminating beat frequencies; 28-pin TSSOP fits tight board space while exposed pad dissipates heat efficiently. |
| TV Monitor Backlighting | Industrial HMI Panel Lighting |
Use Scenario: High-power local-dimming backlight for 32–65" monitors using 8-zone LED arrays with dynamic contrast control. IC Role / Device Role / Timing Role: Multi-channel LED controller supporting parallel channel configuration for higher per-zone current. Use Value: Channels can be paralleled (e.g., 4×2) to deliver 200mA per zone; OVPSET prevents overvoltage stress when zones are disabled mid-operation. | Use Scenario: Ruggedized operator interface lighting in factory automation panels exposed to vibration, dust, and wide voltage input (6–40V). IC Role / Device Role / Timing Role: Fault-tolerant LED driver with UVLO hysteresis and robust open-LED detection for predictive maintenance alerts. Use Value: SHDN/UVLO pin supports programmable input lockout with hysteresis; FAULT pin provides direct microcontroller interrupt for field-service diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-channel LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3783EFE#PBF | 4-channel, 150mA/channel; no integrated OVP amplifier; requires external op-amp for VOUT regulation | Better suited for lower-channel-count, higher-current applications where OVP is implemented externally | Select when fewer strings are needed and higher per-channel current (>100mA) is required without OVP complexity |
| MAX16820ATL+T | 8-channel, but fixed 60mA max per channel; no TSET or CTRL-based thermal derating; no SYNC input | Targeted at cost-sensitive consumer displays with simpler thermal management needs | Select when 60mA/channel suffices and advanced dimming/fault features are not required |
Compared with LTC3783EFE#PBF and MAX16820ATL+T, the LT3760IFE#PBF uniquely combines 8-channel flexibility, ±2% matching, programmable OVP, and dual thermal derating paths - making it optimal for automotive-grade displays demanding reliability and precision.
Availability
LT3760IFE#PBF is available at Aetrix Electronics and suitable for automotive display backlighting, notebook LCD modules, and industrial HMI panel lighting requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned thermal performance.
Supply support for LT3760IFE#PBF 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 product support, documentation, and manufacturing continuity for the LT® family of high-performance analog ICs.
The LT3760IFE#PBF belongs to Linear's high-efficiency LED driver product line, designed specifically for multi-string, high-reliability backlighting in automotive, industrial, and premium consumer displays where current matching, fault resilience, and thermal intelligence are critical.
FAQ
What is the maximum LED string voltage supported by the LT3760IFE#PBF?
The LT3760IFE#PBF supports up to 45V of LEDs per string, with an absolute maximum VOUT rating of 60V. This allows driving configurations such as 12 white LEDs (VF ≈ 3.75V) plus 1V headroom. The device dynamically adjusts VOUT to the minimum required voltage across active strings, improving efficiency and reducing thermal load on the external MOSFET and diode.
How does the LT3760IFE#PBF handle open-LED faults without disrupting other channels?
The LT3760IFE#PBF continuously monitors each LEDx pin voltage; if any falls below 0.5V (indicating an open string), that channel is ignored while others remain fully operational. Only when all 8 strings open does the OVP amplifier activate to clamp VOUT at the user-programmed level. The FAULT pin asserts low only during PWM high time, preventing false triggering during dimming off-periods.
Can the LT3760IFE#PBF be used with a 5V input supply?
No - the LT3760IFE#PBF requires a minimum VIN of 4.5V when VIN is shorted to INTVCC, or 6V otherwise. At 5V input, the device may fail to start or sustain switching due to insufficient headroom for the internal 7V INTVCC regulator and gate drive requirements. Valid input range is 6V–40V (or 4.5V–13V with VIN tied to INTVCC).
What is the purpose of the TSET pin on the LT3760IFE#PBF?
The TSET pin on the LT3760IFE#PBF programs the junction temperature threshold beyond which LED current begins to derate. Using a resistor divider from VREF to GND, designers set a precise die temperature breakpoint (e.g., 105°C); above this, the IC linearly reduces current to protect itself and adjacent components - a critical feature for sealed automotive or industrial enclosures.
Does the LT3760IFE#PBF support both analog and PWM dimming simultaneously?
No - analog dimming (via CTRL pin) and PWM dimming (via PWM pin) are mutually exclusive control methods. When PWM > 1.4V, analog dimming is overridden and LED current is determined solely by PWM duty cycle. When PWM < 0.7V, the device disables switching entirely. For hybrid control, external logic must ensure only one method is active at a time to avoid undefined behavior in the LT3760IFE#PBF.
LT3760IFE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- 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
LT3760IFE#PBF FAQ
1.How can I place an order for LT3760IFE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3760IFE#PBF 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 LT3760IFE#PBF reliable?
The price and inventory of LT3760IFE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3760IFE#PBF is usually 5 days.
3.What payment methods are accepted for LT3760IFE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3760IFE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3760IFE#PBF?
LT3760IFE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3760IFE#PBF 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 LT3760IFE#PBF?
For technical support, including LT3760IFE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3760IFE#PBF requirements.
6.How does Aetrix verify that LT3760IFE#PBF is sourced from the original manufacturer or authorized distributors?
All LT3760IFE#PBF 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 LT3760IFE#PBF meets industry standards.
7.What is the process for return or replacement of LT3760IFE#PBF?
All LT3760IFE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3760IFE#PBF, 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 LT3760IFE#PBF part is unused and in its original packaging.
Return procedure for LT3760IFE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3760IFE#PBF 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…
