My Inquiry
My Account
Analog Devices Inc. LT3496IFE#TRPBF
- Part No.:
- LT3496IFE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- LED Drivers
- Package:
- 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
LT3496IFE#TRPBF.pdf
- Description:
- IC LED DRVR RGLTR PWM 1A 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,864
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3496IFE#TRPBF from Analog Devices (formerly Linear Technology) is a triple-output, constant-current DC/DC LED driver IC operating in buck, boost, or buck-boost topology with independent PWM dimming per channel. It integrates three 750mA, 45V NPN switches and built-in PMOS gate drivers, supports 3000:1 True Color PWM dimming at 120Hz, and delivers precise current regulation via external sense resistors - ideal for RGB lighting systems requiring high-fidelity color mixing.
For engineers reviewing the LT3496IFE#TRPBF datasheet, LT3496IFE#TRPBF pinout, LT3496IFE#TRPBF application, or LT3496IFE#TRPBF equivalent, key selection criteria include its triple-channel independent dimming capability, 3V–30V input range, adjustable 330kHz–2.1MHz switching frequency, open-LED protection per channel, and thermal performance in –40°C to 125°C industrial environments.
Technical Context
The LT3496IFE#TRPBF employs fixed-frequency current-mode control with shared oscillator, ramp generator, and reference across three replicated channels. Each channel features independent PWM inputs, dedicated CTRL pins for analog current adjustment (10mV–100mV threshold), and OVP pins for open-LED fault detection.
Its architecture enables simultaneous operation in mixed topologies (e.g., one channel buck, another boost), with gate drivers (TG1–TG3) delivering 5.5V–7.5V turn-on voltage to external P-channel MOSFETs for LED disconnect, while SW pins drive internal 750mA NPN switches with 260mV VCE(SAT) at 500mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 30V continuous; withstands 40V transients - supports wide-input industrial and automotive LED power rails. |
| Output Current per Channel | Programmable up to 750mA via external sense resistor - enables flexible LED string sizing and brightness scaling. |
| Dimming Ratio | 3000:1 True Color PWM at 120Hz - preserves color fidelity during deep dimming in RGB displays and signage. |
| Switching Frequency | Adjustable 330kHz to 2.1MHz via fADJ pin - balances efficiency, EMI, and external component size (e.g., smaller inductors at higher frequencies). |
| Operating Temperature | –40°C to +125°C junction - qualified for under-hood automotive and industrial ambient conditions. |
| Package | 28-lead TSSOP (FE) with exposed pad - provides low thermal resistance (θJA = 30°C/W) when soldered to PCB ground plane. |
| Protection Features | Open-LED detection per channel (OVP1–OVP3), overtemperature shutdown, UVLO (2.4V), and switch current limiting - ensures robust system-level reliability. |
Pinout & Package
LT3496IFE#TRPBF is housed in a 28-lead plastic TSSOP (FE package) with exposed pad (Pin 29) that must be soldered to PCB ground for thermal and electrical integrity. Pin count, layout, and function mapping are identical to the LT3496EFE#TRPBF variant, differing only in temperature grade.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SHDN | Global shutdown control | Pull below 0.4V to disable all three converters and reduce quiescent current to ≤10µA. |
| PWM1–PWM3 | Independent channel enable/dimming | High = active regulation; low = disconnect LED via TGx and halt switching - enables per-channel 3000:1 PWM dimming. |
| CTRL1–CTRL3 | Current sense threshold setting | 0.1V–1.2V input sets LED current sense voltage to 1/10×CTRL or defaults to 100mV - allows analog dimming or thermal foldback. |
| TG1–TG3 | PMOS gate driver output | Drives external P-channel MOSFET gate; CAPx–TGx limited to 6.5V - safely disconnects LEDs during PWM off-time. |
| SW1–SW3 | Internal NPN switch collector | 750mA rated, 260mV VCE(SAT) at 500mA - connects to inductor and Schottky diode anode in boost/buck-boost configurations. |
| VIN | Main power input | Supplies internal bias circuits; requires local 1µF ceramic bypass capacitor - supports 3V–30V input with 40V transient tolerance. |
| OVP1–OVP3 | Open-LED fault monitor | Threshold = 1V; >1V disables respective channel's switch - protects against LED string open-circuit failure without affecting other channels. |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent PWM dimming | Enables synchronized or staggered 3000:1 dimming per channel - critical for flicker-free RGB color mixing in large displays. |
| Built-in PMOS gate drivers | Eliminates need for external level-shifters; CAPx–TGx clamped to 6.5V - simplifies high-side LED disconnect in boost architectures. |
| Adjustable switching frequency | 330kHz–2.1MHz via single fADJ pin - allows optimization of efficiency vs. solution size across diverse LED string voltages and currents. |
| Per-channel open-LED protection | OVP1–OVP3 independently monitor output voltage - prevents runaway voltage on failed LED strings while maintaining operation of remaining channels. |
| Wide input supply range | 3V–30V operation with 40V transient rating - accommodates 12V/24V automotive, industrial, and signage power buses without external pre-regulation. |
Applications
| RGB Lighting | Billboards and Large Displays |
|---|---|
Use Scenario: Precise white-point tuning and dynamic color rendering in architectural LED fixtures using red, green, and blue emitters. IC Role / Device Role / Timing Role: Triple-channel constant-current source with independent PWM dimming and True Color PWM™ architecture. Use Value: Maintains chromaticity coordinates across 3000:1 dimming range - eliminates color shift during low-light operation. | Use Scenario: Outdoor digital signage requiring high-brightness, high-reliability LED arrays with remote brightness control. IC Role / Device Role / Timing Role: High-voltage boost-mode LED driver supporting long LED strings (e.g., 10× LEDs per channel at 12V input). Use Value: 45V internal switch rating and open-LED protection ensure uninterrupted operation despite individual LED failures in large-scale installations. |
| Automotive and Avionic Lighting | Constant-Current Sources |
Use Scenario: Cabin mood lighting and exterior signal lamps in vehicles where EMI, thermal stress, and functional safety are critical. IC Role / Device Role / Timing Role: Triple-output DC/DC regulator with –40°C to +125°C operation, UVLO, and thermal shutdown. Use Value: Meets AEC-Q100 stress test requirements for automotive electronics; exposed pad enables reliable thermal dissipation on compact PCBs. | Use Scenario: Precision current sources for optical sensors, laser diodes, or calibration equipment requiring stable, low-noise current delivery. IC Role / Device Role / Timing Role: Programmable constant-current sink with 10mV–100mV sense threshold and <1% current regulation accuracy. Use Value: CTRL pin linearity and low 20nA input bias enable sub-mA current setting with minimal drift over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-output LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3496EFE#TRPBF | Same pinout, identical electrical specs, but rated for 0°C to 125°C (not –40°C); lower temperature grade. | Suitable for commercial or benign-temperature industrial environments only. | Select LT3496IFE#TRPBF for designs requiring guaranteed operation down to –40°C, such as outdoor or automotive applications. |
| LT3496IUFD#TRPBF | Same functionality and temperature grade (–40°C to 125°C), but in 4mm × 5mm QFN package with lower θJA (34°C/W) and enhanced thermal performance. | Better suited for space-constrained or thermally demanding layouts where TSSOP footprint is insufficient. | Choose LT3496IUFD#TRPBF when board area or thermal management is prioritized over legacy TSSOP compatibility. |
Compared with LT3496EFE#TRPBF, the LT3496IFE#TRPBF guarantees full –40°C operation, making it suitable for cold-climate deployments; versus LT3496IUFD#TRPBF, it offers proven TSSOP manufacturability and larger thermal pad access, though with slightly higher thermal resistance.
Availability
LT3496IFE#TRPBF is available at Aetrix Electronics and suitable for RGB lighting, automotive interior/exterior lighting, and large-format LED display applications requiring stable component supply, extended temperature operation, and high-dimming-ratio LED control.
Supply support for LT3496IFE#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 product support, documentation, and manufacturing continuity for the LT3496 family.
The LT3496 product line was designed specifically for high-performance, multi-channel LED lighting systems requiring independent dimming, wide input voltage tolerance, and robust fault protection - targeting signage, automotive, and architectural applications.
FAQ
What is the maximum LED string voltage supported by the LT3496IFE#TRPBF in boost mode?
The LT3496IFE#TRPBF supports up to 45V at its CAPx pins, enabling LED strings with total forward voltage up to ~40V in boost configuration (accounting for diode drop and margin). This allows driving 10–12 standard white LEDs (3.2V each) from a 12V input rail. The internal 750mA switch and external Schottky diode selection must be rated accordingly.
Can the LT3496IFE#TRPBF operate with only one or two channels active?
Yes, the LT3496IFE#TRPBF supports partial-channel operation. Unused PWMx pins must be tied to VREF (2V) - not left floating - and corresponding TGx pins left open if no PMOS disconnect is needed. CTRLx and OVPx pins should be grounded if unused. All three channels share bias circuitry, so quiescent current remains consistent regardless of active channel count.
How does the CTRL pin affect LED current accuracy and temperature stability in the LT3496IFE#TRPBF?
The CTRL pin sets the current sense threshold with ±1% typical accuracy over temperature. At 25°C, the LT3496IFE#TRPBF achieves <1% LED current regulation error; over –40°C to 125°C, full-grade devices maintain ≤3% total error due to matched internal reference and amplifier design. Using low-TCR sense resistors further improves stability.
What is the purpose of the exposed pad on the LT3496IFE#TRPBF TSSOP package, and how must it be handled?
Pin 29 (exposed pad) is GND and serves as the primary thermal and electrical ground connection. It must be soldered to a solid PCB ground plane using ≥4 thermal vias (0.3mm diameter) directly beneath the pad. Failure to do so risks thermal overload (>125°C junction) and degraded current regulation accuracy due to ground noise coupling into sensitive VC and CTRL nodes.
Does the LT3496IFE#TRPBF support synchronization of switching frequency across multiple ICs?
No, the LT3496IFE#TRPBF does not support external clock synchronization. Its oscillator is internally generated and adjustable only via the fADJ pin voltage. For multi-IC systems requiring phase-aligned switching (e.g., to reduce input ripple), designers must use asynchronous operation or implement external PWM timing coordination - the LT3496IFE#TRPBF itself lacks SYNC or CLKIN functionality.
LT3496IFE#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 Regulator
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 3
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 30V
- Voltage - Output:
- -
- Current - Output / Channel:
- 1A (Switch)
- Frequency:
- 330kHz ~ 2.1MHz
- Dimming:
- Analog, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSSOP-EP
LT3496IFE#TRPBF FAQ
1.How can I place an order for LT3496IFE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3496IFE#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 LT3496IFE#TRPBF reliable?
The price and inventory of LT3496IFE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3496IFE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3496IFE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3496IFE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3496IFE#TRPBF?
LT3496IFE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3496IFE#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 LT3496IFE#TRPBF?
For technical support, including LT3496IFE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3496IFE#TRPBF requirements.
6.How does Aetrix verify that LT3496IFE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3496IFE#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 LT3496IFE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3496IFE#TRPBF?
All LT3496IFE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3496IFE#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 LT3496IFE#TRPBF part is unused and in its original packaging.
Return procedure for LT3496IFE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3496IFE#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…
