My Inquiry
My Account
Analog Devices Inc. LT3762EUFD#PBF
- Part No.:
- LT3762EUFD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LT3762EUFD#PBF.pdf
- Description:
- IC LED DRIVER CTRLR PWM 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,374
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3762EUFD#PBF from Analog Devices is a 28-lead QFN synchronous DC/DC LED controller supporting constant-current (±3.5%) and constant-voltage (±2%) regulation, rail-to-rail current sensing (0V–60V), 100kHz–1MHz programmable switching frequency, and 3000:1 external PWM dimming. It drives high-current LEDs in boost, SEPIC, buck, or buck-boost topologies with integrated 7.5V gate drivers and spread-spectrum EMI reduction.
For engineers reviewing the LT3762EUFD#PBF datasheet, LT3762EUFD#PBF pinout, LT3762EUFD#PBF application, or LT3762EUFD#PBF equivalent, key selection criteria include VIN range (2.5V–38.5V), 60V synchronous boost capability, open/short LED protection flags, internal PWM dimming (250:1), and thermal shutdown at 165°C - all validated for industrial and automotive lighting designs.
Technical Context
The LT3762EUFD#PBF implements current-mode control with a transconductance error amplifier (VC pin) and rail-to-rail ISP/ISN current sense inputs enabling accurate LED current regulation across 0V–60V common-mode range. Its dual-gate drivers (TG/BG) support synchronous N-MOSFET operation, while PWMTG provides inverted 7V-clamped output for external P-MOSFET disconnect.
It integrates an auxiliary bias supply (AUXSW1/AUXSW2/AUXBST) to generate regulated INTVCC (7.5V ±0.2V), features programmable RT-based oscillator (90–1240 kHz), SSFM-driven spread-spectrum modulation (–30% frequency deviation), and fault logic that asserts OPENLED/SHORTLED flags based on FB voltage thresholds and VISP–ISN overcurrent detection (600 mV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.5V to 38.5V - supports wide-input industrial power rails and battery-backed systems. |
| Switching Frequency | 100kHz to 1MHz via RT resistor - enables optimization of efficiency vs. size for magnetics and capacitors. |
| Current Sense Range | Rail-to-rail 0V–60V on ISP/ISN - allows high-side, low-side, or floating current sensing in any topology. |
| Constant Current Accuracy | ±3.5% - ensures precise LED brightness control without external calibration. |
| Open/Short LED Detection | Dedicated OPENLED and SHORTLED open-drain flags - provide real-time fault reporting without software polling. |
| Dimming Ratio | 3000:1 external PWM, 250:1 internal PWM - meets stringent automotive and architectural lighting requirements. |
| Thermal Protection | 165°C junction shutdown with hysteresis - prevents permanent damage during overload or poor heatsinking. |
Pinout & Package
LT3762EUFD#PBF uses a 28-lead 4mm × 5mm plastic QFN package with exposed pad (Pin 29 = GND), θJA = 43°C/W, θJC = 3.4°C/W. The exposed pad must be soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 29) | Ground reference and thermal path | Exposed pad must be soldered to PCB ground plane for thermal dissipation and noise immunity. |
| ISP / ISN | High-precision LED current sense inputs | Enable ±3.5% constant-current regulation with rail-to-rail 0V–60V common-mode range. |
| TG / BG | Synchronous N-MOSFET gate drivers | Drive external high-side and low-side FETs with 20ns rise/fall times and 130ns/230ns min on-times. |
| PWMTG | Inverted P-MOSFET gate driver output | Provides VISP–7V clamped signal for LED string disconnect and overcurrent protection. |
| OPENLED / SHORTLED | Open-collector fault flag outputs | Assert low under open-circuit (FB > VFB–50mV + VISP–ISN < 25mV) or short-circuit (FB < 300mV) conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 7.5V INTVCC regulator | Eliminates external bias supply; powers gate drivers and control circuitry with 7.5V ±0.2V output. |
| Spread-spectrum modulation (SSFM) | Reduces peak EMI by modulating switching frequency up to –30%, easing EMC compliance. |
| Programmable undervoltage lockout (EN/UVLO) | Configurable startup threshold and hysteresis via resistor divider for reliable system sequencing. |
| Internal PWM dimming generator | Generates 570–1050Hz dimming signal with 0.4%–97% duty cycle controlled by DIM pin voltage. |
| Soft-start with fault timer (SS pin) | 28μA pull-up enables controlled ramp-up; faults discharge SS to halt switching until reset. |
Applications
| Automotive Headlamp Driver | Industrial High-Bay Lighting |
|---|---|
Use Scenario: Driving 30V, 2A LED strings in 12V/24V vehicle electrical systems with cold-crank tolerance down to 2.5V. IC Role / Device Role / Timing Role: Synchronous boost controller providing constant-current regulation, open/short LED fault reporting, and 3000:1 PWM dimming. Use Value: Enables compliance with ISO 16750-2 transient requirements and eliminates need for external current-sense amplifiers or protection ICs. | Use Scenario: Powering multi-string 48V LED arrays in warehouse lighting with 0–10V analog dimming interface. IC Role / Device Role / Timing Role: Constant-current LED driver operating in SEPIC configuration to maintain regulation during 100–277VAC input fluctuations. Use Value: Rail-to-rail ISP/ISN sensing allows direct high-side current measurement, reducing BOM count and improving accuracy vs. shunt-based solutions. |
| UV-C Disinfection Module | Programmable Lab Power Supply |
Use Scenario: Driving pulsed UV-C LEDs requiring precise current limiting and fast fault response to prevent device degradation. IC Role / Device Role / Timing Role: Current-regulated boost controller with 165°C thermal shutdown and 250:1 internal PWM dimming for duty-cycle control. Use Value: Integrated OPENLED/SHORTLED flags enable immediate hardware-level fault isolation, critical for safety-critical disinfection timing. | Use Scenario: Building a benchtop CC/CV power supply with programmable current limit (via CTRL1/CTRL2) and remote sense capability. IC Role / Device Role / Timing Role: Dual-loop regulator using FB for voltage feedback and ISP/ISN for current feedback with ±2% CV / ±3.5% CC accuracy. Use Value: Eliminates need for separate current-sense amplifier and voltage reference; CTRL pins allow digital DAC control of current setpoint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3783EFE#PBF | Non-synchronous boost controller; no TG driver; max 40V output; no SSFM; 1000:1 PWM dimming. | Lacks synchronous rectification and spread-spectrum EMI reduction; lower output voltage headroom. | Choose when cost sensitivity outweighs efficiency and EMI performance; verify thermal design for same power level. |
| LM3410XSD/NOPB | Single-channel 40V synchronous boost; fixed 1.6MHz fSW; no internal PWM generator; no OPENLED/SHORTLED flags. | No fault flag outputs or programmable dimming; limited to boost-only topology; no SEPIC/buck-boost support. | Select only for simple, fixed-frequency boost LED drivers where diagnostics and topology flexibility are not required. |
Compared with LTC3783EFE#PBF and LM3410XSD/NOPB, LT3762EUFD#PBF delivers higher output voltage (60V), integrated spread-spectrum EMI reduction, dual fault flags, and full topology flexibility - making it optimal for demanding industrial and automotive LED systems requiring reliability, diagnostics, and regulatory compliance.
Availability
LT3762EUFD#PBF is available at Aetrix Electronics and suitable for industrial lighting, automotive headlamps, and UV-C disinfection modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.
Supply support for LT3762EUFD#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 (now part of Analog Devices, Inc., following merger with Linear Technology) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LT3762 product line was designed specifically for high-efficiency, high-reliability LED driving in harsh environments - emphasizing precision current regulation, robust fault protection, and flexible topology support for automotive, industrial, and medical lighting.
FAQ
What is the maximum output voltage supported by the LT3762EUFD#PBF?
The LT3762EUFD#PBF supports synchronous boost output voltage up to 60V, verified by Absolute Maximum Ratings (SW, BOOST, TG, BG, ISP, ISN ≤ 60V) and confirmed in Typical Application schematics. This enables direct drive of multi-LED series strings without cascaded converters, maintaining high efficiency even at elevated output voltages.
Does the LT3762EUFD#PBF support SEPIC topology?
Yes, the LT3762EUFD#PBF explicitly supports SEPIC configuration, as stated in the Applications section and enabled by rail-to-rail switch current sensing (SNSP/SNSN) and independent control of TG/BG drivers. The datasheet confirms operation in boost, SEPIC, buck, and buck-boost modes - with SEPIC requiring high-side current sensing at SNSP.
How does the LT3762EUFD#PBF implement open LED protection?
The LT3762EUFD#PBF asserts the OPENLED flag when FB exceeds VFB–50mV (typical) AND VISP–ISN falls below 25mV (C/10 threshold), indicating loss of current path. This dual-condition detection prevents false triggers during transient events and is latched during PWM low states for reliable fault reporting in pulsed dimming applications.
What is the purpose of the PWMTG pin on the LT3762EUFD#PBF?
The PWMTG pin on the LT3762EUFD#PBF delivers an inverted, 7V-clamped gate drive signal (VISP–7V) to control an external P-channel MOSFET placed between the LED string and VISP. This enables hardware-level LED disconnect during faults or standby, enhancing safety and enabling true zero-current shutdown without relying on PWM blanking.
Can the LT3762EUFD#PBF operate with input voltage below 3V?
Yes, the LT3762EUFD#PBF guarantees operation down to 2.5V VIN minimum, confirmed in Electrical Characteristics (TYPICAL APPLICATION shows 3V–24V input). Its EN/UVLO threshold (1.22V nominal) and internal 7.5V INTVCC regulator ensure stable gate drive and control loop functionality even during cold-crank or low-battery conditions in automotive systems.
LT3762EUFD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- SEPIC, Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.5V
- Voltage - Supply (Max):
- 38.5V
- Voltage - Output:
- 60V
- Current - Output / Channel:
- -
- Frequency:
- 90kHz ~ 1.24MHz
- Dimming:
- Analog, PWM
- Applications:
- Industrial Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (4x5)
LT3762EUFD#PBF FAQ
1.How can I place an order for LT3762EUFD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3762EUFD#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 LT3762EUFD#PBF reliable?
The price and inventory of LT3762EUFD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3762EUFD#PBF is usually 5 days.
3.What payment methods are accepted for LT3762EUFD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3762EUFD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3762EUFD#PBF?
LT3762EUFD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3762EUFD#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 LT3762EUFD#PBF?
For technical support, including LT3762EUFD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3762EUFD#PBF requirements.
6.How does Aetrix verify that LT3762EUFD#PBF is sourced from the original manufacturer or authorized distributors?
All LT3762EUFD#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 LT3762EUFD#PBF meets industry standards.
7.What is the process for return or replacement of LT3762EUFD#PBF?
All LT3762EUFD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3762EUFD#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 LT3762EUFD#PBF part is unused and in its original packaging.
Return procedure for LT3762EUFD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3762EUFD#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…
