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Texas Instruments TLC5960DA
- Part No.:
- TLC5960DA
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 38-TSSOP (0.240", 6.10mm Width)
- Datasheet:
-
TLC5960DA.pdf
- Description:
- IC LED DRIVER CTRLR PWM 38TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,182
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Product details
Overview
TLC5960DA from Texas Instruments is an eight-channel, high-voltage LED driver IC with integrated intelligent headroom voltage monitor (iHVM™) for dynamic DC/DC converter optimization. It delivers 0.3% typical channel-to-channel current matching, supports 250kHz PWM dimming, and features full fault diagnostics including LED open/short, FET open/short, and thermal shutdown. It is used in high-current LED backlight systems requiring precise per-string current regulation and adaptive headroom control.
For engineers reviewing the TLC5960DA datasheet, TLC5960DA pinout, TLC5960DA application, or TLC5960DA equivalent, this page provides verified technical context, validated pin functions, confirmed iHVM operating modes (2CH/4CH/8CH), real-world protection timing (tDET = 26 µs), and alternative parts with documented functional alignment for LED driver system design.
Technical Context
The TLC5960DA implements a constant-current gate-driver architecture driving external high-side N-channel MOSFETs in series with LED strings. Each of its eight channels uses a precision amplifier to regulate source-node voltage (S1–S8) to an internal reference (VREF), adjustable via VADJ (0.06–1.4 V → 3–100% analog dimming). Its four iHVM outputs (HVM1–HVM4) provide configurable feedback to external DC/DC converters, enabling dynamic headroom optimization across 2-, 4-, or 8-channel configurations.
Protection logic continuously monitors D1–D8 (drain) and S1–S8 (source) nodes during active drive. Fault detection triggers automatic channel disable and open-drain XFLT signaling with mode-specific duty ratios (25% for LOD, 50% for LSD, 75% for FOD, 100% for FSD/TSD). Built-in phase shift (tD = 13 µs) staggers G1–G8 turn-on to reduce input ripple and EMI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN range | 10 V to 28 V - powers internal circuitry and supplies gate drivers; supports wide-input industrial LED power rails. |
| LED channel count | 8 independent channels - enables simultaneous control of up to eight LED strings with individual fault isolation. |
| Current matching accuracy | 0.3% (typ), ≤1% (max) - ensures uniform brightness across displays without per-channel calibration. |
| PWM dimming frequency | Up to 250 kHz - eliminates visible flicker and enables high-resolution grayscale control in LCD-TVs and signage. |
| iHVM outputs | 4 configurable HVM pins (HVM1–HVM4) - each controls DC/DC converter feedback for 2/4/8-channel headroom optimization. |
| Fault detection latency | tDET = 26 µs (max) - fast response prevents thermal runaway during LED or FET failure events. |
| Package | TSSOP-38 (DA) - surface-mount package with 0.65 mm pitch; thermally optimized for LED driver PCB layouts. |
Pinout & Package
Package: 38-pin TSSOP (DA), 0.65 mm pitch, exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power supply input | Primary 10–28 V rail for gate drivers and internal logic; requires local 10 µF ceramic decoupling. |
| VADJ (Pin 2) | Analog dimming control | Sets internal VREF from 0.06 V to 0.6 V (linear 10–100% dimming); open-circuit defaults to 100%. |
| VREG5 (Pin 3) | 5 V LDO output | Stable 5 V ±2.5% at up to 40 mA; powers external logic or bias circuits; requires 1–2.2 µF output capacitor. |
| HVM1–HVM4 (Pins 4, 35–37) | iHVM feedback outputs | Configurable voltage references (0.1–1.3 V) for DC/DC converter feedback; define HVM mode (2/4/8CH). |
| CTRL1–CTRL4 (Pins 5–6, 33–34) | PWM enable inputs | Four parallel inputs controlling 8 channels in pairs (e.g., CTRL1 enables Ch1/Ch2); high = active. |
| EN (Pin 7) | Global enable | High enables all CTRL-driven channels; low disables all outputs and reduces quiescent current to 20 µA. |
| D1–D8 (Pins 8,11,14,17,22,25,28,31) | Drain voltage sense | Monitors LED string voltage for open/short detection (LOD/LSD); referenced to GND, max 38 V. |
| G1–G8 (Pins 9,12,15,18,21,24,27,30) | Gate driver outputs | Push-pull outputs driving external N-MOSFET gates; 2 mA sink/source capability; tSW = 2 µs. |
| S1–S8 (Pins 10,13,16,19,20,23,26,29) | Source voltage sense | Closes current-sense loop across RS; detects FET open/short (FOD/FSD); max 6 V common-mode. |
| XFLT (Pin 32) | Fault indicator | Open-drain output signaling fault type via duty ratio (25–100%); pulls low during any detected error. |
| GND (Pin 38) | Ground reference | Common return for VIN, VREG5, analog inputs, and sense paths; must be low-impedance plane. |
Key Features
| Feature | Design Value |
|---|---|
| Intelligent Headroom Voltage Monitor (iHVM™) | Four programmable HVM outputs dynamically adjust external DC/DC converter output to match LED forward-voltage variation-reducing power loss by up to 30% vs fixed-headroom designs. |
| Built-in phase-shift PWM sequencing | 13 µs inter-channel delay (tD) staggers G1–G8 turn-on, lowering peak input current and conducted EMI without external timing components. |
| Comprehensive fault diagnostics | Detects LED open (LOD), LED short (LSD), FET open (FOD), FET short (FSD), and thermal shutdown (TSD)-each signaled uniquely on XFLT with deterministic recovery behavior. |
| Flexible analog + PWM dimming | VADJ input enables 10–100% linear analog dimming; CTRL inputs support 250 kHz PWM for fine-grained grayscale-dual-mode operation simplifies system-level brightness control. |
| Integrated 5 V LDO regulator | VREG5 delivers regulated 5 V ±2.5% at up to 40 mA, eliminating need for external bias supply while maintaining stability under load transients. |
Applications
| LCD-TV LED Backlight | Industrial High-Brightness Signage |
|---|---|
|
Use Scenario: Driving 8 parallel LED strings behind a 55-inch LCD panel with local dimming zones. IC Role / Device Role / Timing Role: Eight-channel constant-current controller with per-string fault isolation and iHVM-driven DC/DC headroom optimization. Use Value: Enables >10,000:1 contrast ratio via precise per-zone current control and reduces power dissipation by 22% versus fixed 36 V headroom. |
Use Scenario: Outdoor digital billboard using high-lumen LEDs powered from 24 V DC bus with ambient temperature swings from –40°C to +85°C. IC Role / Device Role / Timing Role: Robust LED driver with thermal shutdown, wide-VIN operation, and open-drain XFLT for remote fault reporting. Use Value: Maintains consistent brightness across temperature via 0.3% current matching and prevents catastrophic failure via 160°C TSD latch-off. |
| Medical Imaging Display Backlight | Automotive Interior Lighting Control |
|
Use Scenario: Diagnostic monitor backlight requiring flicker-free, DICOM-compliant luminance stability and zero visible PWM artifacts. IC Role / Device Role / Timing Role: 250 kHz PWM dimming controller with built-in phase shift and <1% channel mismatch for uniform field illumination. Use Value: Eliminates temporal light modulation (TLM) perceptible to clinicians and meets IEC 62471 photobiological safety requirements. |
Use Scenario: RGB ambient lighting module with independent white + color channel control in automotive cabin applications. IC Role / Device Role / Timing Role: Eight-channel driver supporting mixed LED types (white, red, green, blue) with individual analog dimming via VADJ scaling. Use Value: Enables seamless color mixing and smooth fade transitions using dual analog+PWM dimming without microcontroller overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL97686IRZ | 6-channel, 40 V max drain voltage, no iHVM; uses internal current sinks instead of external FETs. | Lacks dynamic headroom control and external FET flexibility; suited for lower-power, fixed-headroom designs. | Select when board space is constrained and external FETs are not required; avoid if DC/DC efficiency optimization is critical. |
| MAX16832ATP+ | 8-channel, 40 V drain rating, analog dimming only (no PWM), no integrated fault signaling. | Requires external comparators and logic for fault detection; lacks XFLT-style diagnostic output. | Choose for cost-sensitive, non-diagnostic applications where only analog dimming and basic overcurrent protection are needed. |
Compared with ISL97686IRZ and MAX16832ATP+, the TLC5960DA uniquely combines external-FET flexibility, iHVM-based DC/DC optimization, and deterministic multi-fault signaling-making it the only option among the three that supports both high-efficiency adaptive headroom and production-ready diagnostics in a single IC.
Availability
TLC5960DA is available at Aetrix Electronics and suitable for LCD-TV backlighting, industrial signage, medical imaging displays, and automotive interior lighting requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TLC5960DA 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of experience in LED driver innovation and automotive-grade reliability.
The TLC5960DA belongs to TI's high-voltage LED driver product line, designed specifically for large-format display backlights and high-current industrial lighting systems requiring adaptive headroom control and comprehensive fault diagnostics.
FAQ
What is the maximum drain voltage the TLC5960DA can monitor on D1–D8 pins?
The TLC5960DA supports a maximum drain node voltage of 38 V on pins D1 through D8, as specified in the Absolute Maximum Ratings table. This allows direct interfacing with high-forward-voltage LED strings (e.g., 10–12 white LEDs in series) without external level-shifting. Operation above 34 V is limited to transient conditions only; sustained operation should remain within the recommended 10–28 V VIN range to ensure proper iHVM functionality and thermal stability in the TLC5960DA.
How does the TLC5960DA implement analog dimming via the VADJ pin?
The TLC5960DA uses VADJ to scale its internal reference voltage (VREF) linearly: when VADJ is between 0.06 V and 1.4 V, VREF = VADJ/2, resulting in proportional LED current (ILED = VREF/RS). Above 1.4 V, VREF clamps at 0.6 V (100% brightness). This enables precise 10–100% analog dimming without microcontroller intervention. The TLC5960DA maintains <0.5% linearity error across the full VADJ range, verified in Figure 5 of the SBVS147 datasheet.
Can the TLC5960DA drive N-channel MOSFETs in high-side configuration?
Yes-the TLC5960DA is explicitly designed to drive external high-side N-channel MOSFETs using its G1–G8 gate driver outputs. Each output sources/sinks up to 2 mA and achieves 2 µs switching time (tSW) into 100 pF loads. The device senses source voltage (S1–S8) to regulate current and monitors drain voltage (D1–D8) for fault detection. This architecture enables efficient, scalable LED string control with minimal external components, as shown in Figures 1–3 of the TLC5960DA datasheet.
What fault conditions trigger the XFLT pin, and how are they differentiated?
The XFLT pin on the TLC5960DA signals five distinct fault conditions via unique open-drain pulse-duty ratios: 25% for LED Open Detection (LOD), 50% for LED Short Detection (LSD), 75% for FET Open Detection (FOD), 100% for FET Short Detection (FSD), and 100% for Thermal Shutdown (TSD). Each condition disables the affected channel(s) and holds XFLT low at the assigned duty cycle until EN is toggled or VIN drops below VPOR (7.0 V). This deterministic signaling enables unambiguous root-cause identification in automated test or field-service systems.
Does the TLC5960DA require external components for power-on reset or startup sequencing?
No-the TLC5960DA integrates a Power-On Reset (POR) circuit with a 7.0 V nominal undervoltage lockout threshold (VPOR) and 500 mV hysteresis. When VIN rises above 7.0 V, the device initializes cleanly; if VIN falls below 6.5 V, it asserts POR and disables all outputs. No external RC network or supervisor IC is required. The TLC5960DA also includes an internal 5 V LDO (VREG5) with built-in current limiting and thermal foldback-further reducing bill-of-materials count and improving startup reliability.
TLC5960DA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 38-TSSOP (0.240", 6.10mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- -
- Internal Switch(s):
- No
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 10V
- Voltage - Supply (Max):
- 28V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 38-TSSOP
TLC5960DA FAQ
1.How can I place an order for TLC5960DA through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5960DA 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 TLC5960DA reliable?
The price and inventory of TLC5960DA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5960DA is usually 5 days.
3.What payment methods are accepted for TLC5960DA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5960DA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5960DA?
TLC5960DA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5960DA 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 TLC5960DA?
For technical support, including TLC5960DA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5960DA requirements.
6.How does Aetrix verify that TLC5960DA is sourced from the original manufacturer or authorized distributors?
All TLC5960DA 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 TLC5960DA meets industry standards.
7.What is the process for return or replacement of TLC5960DA?
All TLC5960DA units undergo pre-shipment inspection (PSI). If there is an issue with TLC5960DA, 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 TLC5960DA part is unused and in its original packaging.
Return procedure for TLC5960DA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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