My Inquiry
My Account
Analog Devices Inc. LT3762HUFD#TRPBF
- Part No.:
- LT3762HUFD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LT3762HUFD#TRPBF.pdf
- Description:
- IC LED DRIVER CTRLR PWM 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,507
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3762HUFD#TRPBF from Analog Devices is a 28-lead QFN synchronous boost 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 automotive lighting, industrial signage, and battery-powered LED systems with up to 60V output voltage.
For engineers reviewing the LT3762HUFD#TRPBF datasheet, LT3762HUFD#TRPBF pinout, LT3762HUFD#TRPBF application, or LT3762HUFD#TRPBF equivalent, key selection factors include its –40°C to 150°C junction temperature rating, integrated 7.5V INTVCC regulator, spread-spectrum modulation (SSFM) for EMI reduction, PMOS PWM top-gate driver (PWMTG), and dual-mode protection flags (OPENLED/SHORTLED).
Technical Context
The LT3762HUFD#TRPBF implements current-mode control with a transconductance error amplifier (VC pin), programmable oscillator (RT pin), and rail-to-rail ISP/ISN current sense amplifier (gm = 120 µS). Its synchronous gate drivers (TG/BG) support boost, SEPIC, buck, and buck-boost topologies with minimum on/off times of 130 ns / 150 ns (TG) and 230 ns / 150 ns (BG).
It integrates fault management via open-collector OPENLED and SHORTLED flags, soft-start/fault timer (SS pin), and spread-spectrum modulation (SSFM pin) with triangle ramp generation. The internal 7.5V INTVCC regulator powers gate drivers and logic, while VREF (2.0V ±2%) supplies bias for CTRL/DIM pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.5V to 38.5V continuous; supports battery-powered and wide-input industrial systems. |
| Output Voltage | Up to 60V synchronous boost; enables high-brightness LED strings without cascading stages. |
| Switching Frequency | 100kHz–1MHz (RT-programmable); balances efficiency, EMI, and external component size. |
| Current Regulation Accuracy | ±3.5% over temperature; ensures stable LED brightness in automotive and outdoor environments. |
| Operating Junction Temp | –40°C to +150°C; qualified for under-hood automotive and high-ambient industrial use. |
| Dimming Ratio | 3000:1 external PWM; meets stringent flicker-free dimming requirements in display backlighting. |
| INTVCC Regulator | 7.5V ±2.7%, 140mA max; eliminates need for external bias supply for gate drivers. |
Pinout & Package
LT3762HUFD#TRPBF uses a 28-lead 4mm × 5mm plastic QFN package with exposed thermal pad (Pin 29 = GND). Thermal resistance: θJA = 43°C/W, θJC = 3.4°C/W.
| 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 and electrical integrity. |
| ISP / ISN | High-side LED current sense inputs | Rail-to-rail sensing (0V–60V common-mode); enables ground-referenced or high-side current monitoring. |
| TG / BG | Synchronous N-MOSFET gate drivers | Drive external low-side (BG) and high-side (TG) FETs; 20ns rise/fall time with 2.7nF load. |
| PWMTG | Inverted PWM top-gate driver output | Drives series PMOS between VISP and (VISP – 7V); internal 7V clamp protects gate oxide. |
| OPENLED / SHORTLED | Open-collector fault flag outputs | Assert when LED open (FB > VFB–50mV & VISP–ISN < 25mV) or shorted (FB < 300mV or VISP–ISN > 600mV). |
| SSFM | Spread-spectrum modulation input | Enables triangle-ramp frequency dithering (–30% modulation depth) to reduce peak EMI emissions. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable switching frequency | 100kHz–1MHz via RT resistor; allows optimization for efficiency vs. size in space-constrained designs. |
| Integrated 7.5V INTVCC regulator | Supplies gate drivers and internal logic; eliminates external LDO, reducing BOM count and layout area. |
| 3000:1 external PWM dimming | Supports high-resolution brightness control in automotive HUDs and architectural lighting without visible flicker. |
| Rail-to-rail current sense range | 0V–60V common-mode input on ISP/ISN; enables flexible placement of sense resistor in boost, SEPIC, or buck-boost configurations. |
| Thermal shutdown & fault latching | 165°C junction shutdown with SS pin fault timer; prevents latch-up during transient overloads. |
Applications
| Automotive Headlamp Driver | Industrial High-Bay Lighting |
|---|---|
Use Scenario: Driving 30V, 2A LED arrays in vehicle headlamps with input from 12V battery (3V–24V range after cold-crank derating). IC Role / Device Role / Timing Role: Synchronous boost controller regulating constant current with 3000:1 PWM dimming and OPENLED/SHORTLED fault reporting. Use Value: Maintains ±3.5% current accuracy across –40°C to +150°C junction temp, enabling reliable beam pattern control under extreme ambient conditions. | Use Scenario: Powering 48V, 1.5A LED strings in warehouse high-bay fixtures powered by 24V DC distribution bus. IC Role / Device Role / Timing Role: Constant-current LED driver operating in boost mode with spread-spectrum modulation to meet CISPR-11 Class B EMI limits. Use Value: Reduces conducted EMI peaks by >10dB via SSFM, eliminating need for additional filtering components in cost-sensitive industrial enclosures. |
| Battery-Powered Portable Lighting | LED Signage Power Supply |
Use Scenario: Driving multi-string RGB LEDs in portable stage lighting using 2S Li-ion (6V–8.4V) input with 36V output requirement. IC Role / Device Role / Timing Role: Wide-VIN synchronous boost controller with analog dimming (DIM pin) and internal PWM generator (800Hz typical). Use Value: Enables smooth 250:1 internal PWM dimming without external microcontroller, extending runtime via efficient 98% peak efficiency at 3V input. | Use Scenario: Powering outdoor LED message boards requiring constant-voltage operation (12V/24V) with overvoltage and open-circuit protection. IC Role / Device Role / Timing Role: Dual-mode controller operating as constant-voltage regulator (FB feedback) with programmable UVLO and open-LED detection. Use Value: Provides ±2% voltage regulation and automatic OPENLED flag assertion if any LED string opens, enabling remote fault diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3756IUFD#TRPBF | Wider VIN range (2.8V–100V), no integrated INTVCC regulator, lower max output voltage (60V same), no SSFM. | Preferred for ultra-high-input applications (e.g., 48V industrial bus); requires external bias supply. | Select when input exceeds 38.5V or higher fault tolerance is needed; not drop-in due to missing INTVCC and SSFM. |
| LM3410XSD/NOPB | Fixed 1.6MHz frequency, no programmable dimming, no OPENLED/SHORTLED flags, smaller 6-pin SOT-23 package. | Suitable for low-power (<500mA), cost-sensitive consumer LED lamps without diagnostics. | Choose only for simple, low-current boost LED drivers where thermal robustness and diagnostic features are unnecessary. |
Compared with LT3756IUFD#TRPBF and LM3410XSD/NOPB, LT3762HUFD#TRPBF uniquely combines –40°C to +150°C operation, integrated 7.5V bias, SSFM, and dual-fault flags-making it optimal for thermally demanding, safety-critical LED systems requiring field diagnostics and EMI compliance.
Availability
LT3762HUFD#TRPBF is available at Aetrix Electronics and suitable for automotive lighting, industrial high-bay fixtures, and battery-powered portable lighting requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT3762HUFD#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 (now part of Analog Devices, Inc., following merger with Linear Technology) is a global leader in high-performance analog, mixed-signal, and power management ICs.
The LT3762 product line was designed specifically for high-efficiency, high-reliability LED driving in harsh environments-emphasizing wide temperature operation, integrated protection, and flexible topology support (boost/SEPIC/buck/buck-boost).
FAQ
What is the maximum junction temperature rating for LT3762HUFD#TRPBF?
The LT3762HUFD#TRPBF is rated for operation from –40°C to +150°C junction temperature, making it suitable for under-hood automotive applications and high-ambient industrial environments. This H-grade qualification exceeds standard industrial (–40°C to +125°C) ratings and is verified per Analog Devices' characterization and statistical process controls.
Does LT3762HUFD#TRPBF support both constant-current and constant-voltage regulation modes?
Yes, LT3762HUFD#TRPBF supports dual regulation modes: constant-current (via ISP/ISN feedback) with ±3.5% accuracy and constant-voltage (via FB pin) with ±2% accuracy. The FB pin serves both as a voltage regulation input and as an interface for open-LED and overvoltage protection functions.
How does the SSFM pin reduce EMI in LT3762HUFD#TRPBF designs?
The SSFM pin in LT3762HUFD#TRPBF enables spread-spectrum frequency modulation by generating a triangle ramp that modulates the switching frequency between fSW and fSW – 30%. This dithering spreads energy across a wider bandwidth, lowering peak EMI emissions-critical for meeting CISPR-11 or EN55022 standards without added filtering.
Can LT3762HUFD#TRPBF drive LEDs in SEPIC topology?
Yes, LT3762HUFD#TRPBF supports SEPIC configuration via rail-to-rail current sensing (0V–60V on ISP/ISN) and nonsynchronous switch control. When configured for SEPIC, SNSP connects to the source of the low-side FET and SNSN to ground, enabling accurate current regulation independent of input/output polarity relationships.
What protection features are integrated into LT3762HUFD#TRPBF?
LT3762HUFD#TRPBF integrates open-LED (OPENLED flag), shorted-LED (SHORTLED flag), overcurrent (ISP–ISN > 600mV), thermal shutdown (165°C), INTVCC undervoltage lockout (5.3V), and soft-start/fault timer (SS pin). All protections assert dedicated open-collector flags and disable switching until fault clearance.
LT3762HUFD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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 ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (4x5)
LT3762HUFD#TRPBF FAQ
1.How can I place an order for LT3762HUFD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3762HUFD#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 LT3762HUFD#TRPBF reliable?
The price and inventory of LT3762HUFD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3762HUFD#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3762HUFD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3762HUFD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3762HUFD#TRPBF?
LT3762HUFD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3762HUFD#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 LT3762HUFD#TRPBF?
For technical support, including LT3762HUFD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3762HUFD#TRPBF requirements.
6.How does Aetrix verify that LT3762HUFD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3762HUFD#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 LT3762HUFD#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3762HUFD#TRPBF?
All LT3762HUFD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3762HUFD#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 LT3762HUFD#TRPBF part is unused and in its original packaging.
Return procedure for LT3762HUFD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3762HUFD#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…
