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Texas Instruments TLC6C598QDRQ1
- Part No.:
- TLC6C598QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLC6C598QDRQ1.pdf
- Description:
- IC LED DRIVER PS 50MA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,951
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Product details
Overview
TLC6C598QDRQ1 from Texas Instruments is an automotive-grade, 8-bit serial-in/parallel-out LED driver with low-side open-drain DMOS outputs, 40 V drain-source voltage rating, 50 mA continuous sink current per channel at 5 V VCC, and integrated thermal shutdown protection - used in instrument cluster backlighting and tell-tale lamp control.
For engineers reviewing the TLC6C598QDRQ1 datasheet, TLC6C598QDRQ1 pinout, TLC6C598QDRQ1 application, or TLC6C598QDRQ1 equivalent, this page delivers verified electrical specs, AEC-Q100 Grade 1 qualification details, cascading interface behavior, thermal trip thresholds, and real-world design implications for LED load driving under 9–40 V battery supply conditions.
Technical Context
The TLC6C598QDRQ1 implements a dual-register architecture: an 8-bit shift register clocked on SRCK rising edge feeds an 8-bit D-type storage register clocked on RCK rising edge; data transfers to output buffers only when CLR is high. Output enable (G) controls transparency of latch data to DMOS drivers - low enables sinking, high forces all outputs off.
All eight DRAINx outputs are low-side, open-drain DMOS transistors rated for 40 V VDS and 50 mA continuous sink current at 5 V VCC and 25°C; rDS(on) ranges from 6.0 Ω (single channel, 25°C) to 14.5 Ω (all channels, 125°C). Thermal shutdown activates at ~175°C (typical), with 15°C hysteresis, forcing open-circuit output state until junction cools below ~160°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3 V to 5.5 V logic supply - supports direct connection to MCU I/O rails without level-shifting. |
| Output Voltage Rating | 40 V drain-to-source - withstands automotive load-dump transients up to 40 V without external clamping. |
| Sink Current per Channel | 50 mA continuous at VCC = 5 V, TA = 25°C - sufficient for driving multiple LEDs in series-parallel strings. |
| Thermal Shutdown Threshold | 175°C typical trip point with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
| Serial Clock Frequency | 10 MHz max SRCK frequency - enables fast LED pattern updates (e.g., 800 kbps serial data rate). |
| ESD Protection | ±2000 V HBM, ±750 V CDM - meets AEC-Q100 requirements for robustness in automotive assembly and field environments. |
| Propagation Delay (G to Output) | 75 ns (tPHL) / 220 ns (tPLH) - ensures predictable timing for synchronized PWM dimming across all 8 channels. |
Pinout & Package
Package: 16-pin SOIC (D package), body size 9.90 mm × 3.91 mm; RoHS-compliant, Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Logic power supply input | Must be decoupled with 0.1 µF ceramic capacitor placed adjacent to pin - critical for noise immunity and stable register operation. |
| SER_IN (Pin 2) | Serial data input | Accepts MCU SPI/MCU GPIO bitstream; data latched on rising SRCK edge - enables daisy-chained configuration without additional control lines. |
| DRAIN0–DRAIN7 (Pins 3–6, 11–14) | Low-side open-drain DMOS outputs | Sink current from LED anodes tied to battery rail; each independently controllable - supports individual LED on/off or global PWM via G pin. |
| CLR (Pin 7) | Active-low shift register clear | Asynchronous reset - drives all internal registers low on falling edge; recommended for power-up initialization to prevent glitchy LED turn-on. |
| G (Pin 8) | Active-low output enable | Global enable/disable for all 8 channels - used for hardware PWM dimming or emergency shutdown independent of shift register state. |
| GND (Pin 16) | Power ground reference | Primary thermal and electrical return path - must connect to large copper pour for heat dissipation and EMI reduction. |
| RCK (Pin 10) | Storage register clock | Latches shift register contents into output buffer on rising edge - separates data shifting from output update, enabling glitch-free display updates. |
| SER_OUT (Pin 9) | Cascaded serial output | Drives SER_IN of next device on falling SRCK edge - eliminates setup/hold timing violations in multi-device chains. |
| SRCK (Pin 15) | Shift register clock | Controls serial data entry rate; minimum pulse width 30 ns - compatible with standard MCU GPIO toggle speeds. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification (AEC-Q100 Grade 1) | Validated for −40°C to +125°C ambient operation - suitable for under-hood and instrument panel mounting without derating. |
| Enhanced cascading via SER_OUT phase inversion | Serial data clocks out on SRCK falling edge - provides extra hold time for downstream devices, improving reliability in long PCB traces or noisy environments. |
| Slow switching (tr = 210 ns, tf = 128 ns) | Reduces high-frequency EMI generation - simplifies EMC compliance in automotive lighting systems without added filtering components. |
| Thermal shutdown with hysteresis | Prevents thermal runaway during overcurrent or poor heatsinking; automatic recovery at ~160°C avoids manual reset requirement. |
| Single-input register clear (CLR) | Ensures deterministic initial state at power-up - eliminates need for software initialization sequence before first LED update. |
Applications
| Instrumentation Cluster Backlighting | Tell-Tale Lamp Control |
|---|---|
|
Use Scenario: Driving segmented LCD backlight LEDs and warning indicator lamps in automotive digital instrument clusters. IC Role / Device Role / Timing Role: Low-side LED sink driver receiving serial commands from cluster MCU; handles 8-channel independent on/off and global PWM dimming. Use Value: Enables compact, thermally robust layout with single IC replacing discrete transistor arrays - reduces BOM count and improves reliability over temperature cycling. |
Use Scenario: Controlling red/yellow status lamps (e.g., brake, oil, ABS) directly from vehicle body controller MCU. IC Role / Device Role / Timing Role: Serial-interface LED driver providing fault-tolerant, current-limited sinking for incandescent or LED tell-tales. Use Value: Withstands 40 V load-dump events without external TVS - eliminates need for discrete protection components in lamp driver stage. |
| LED Illumination for Interior Lighting | Multi-Stage Cascaded LED Arrays |
|
Use Scenario: Powering map lights, footwell LEDs, and door courtesy lighting in passenger compartment modules. IC Role / Device Role / Timing Role: Medium-voltage LED driver interfacing with 3.3 V or 5 V microcontrollers via SPI-compatible serial bus. Use Value: 50 mA per channel supports high-brightness white LEDs at 30 mA nominal - delivers consistent luminance across wide battery voltage range (9–40 V). |
Use Scenario: Expanding LED channel count beyond 8 using daisy-chained TLC6C598QDRQ1 devices in headlight or ambient lighting modules. IC Role / Device Role / Timing Role: Cascadable shift register with phase-inverted SER_OUT - synchronizes data propagation across multiple ICs without clock skew issues. Use Value: Eliminates need for additional address decoding logic or parallel bus routing - reduces PCB layer count and signal integrity complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC6C5912QDRQ1 | 12-channel version, same 40 V/50 mA rating, identical pinout except extended DRAINx pins - requires PCB redesign for 20-pin SOIC. | Supports higher LED count per board without cascading - better for space-constrained modules needing >8 channels. | Select when channel count exceeds 8 and board layout allows larger package; shares same thermal and ESD specs. |
| TPS65562AQPWPRQ1 | Integrated 8-channel constant-current LED driver with analog/digital dimming, 36 V max, 120 mA per channel - no shift register, uses I²C interface. | Eliminates need for MCU bit-banging; adds current regulation accuracy and diagnostics - suited for premium lighting requiring precise brightness matching. | Choose when system demands tighter current matching (<±3%) or diagnostic feedback; not drop-in - requires firmware and layout changes. |
Compared with TLC6C598QDRQ1, TLC6C5912QDRQ1 offers more channels in same footprint family but needs PCB revision, while TPS65562AQPWPRQ1 provides superior current regulation and digital control at cost of interface complexity and non-cascadable architecture.
Availability
TLC6C598QDRQ1 is available at Aetrix Electronics and suitable for automotive instrumentation, tell-tale lamp systems, and interior LED lighting requiring stable component supply across extended temperature and voltage ranges.
Supply support for TLC6C598QDRQ1 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.
The TLC6C598QDRQ1 belongs to TI's automotive-qualified power logic LED driver product line, designed specifically for robust, low-cost, serial-controlled LED sinking in harsh-temperature vehicle environments.
FAQ
What is the maximum continuous sink current per channel for TLC6C598QDRQ1?
The TLC6C598QDRQ1 supports 50 mA continuous sink current per channel when VCC = 5 V and ambient temperature is 25°C. This rating decreases with rising junction temperature - e.g., to 48 mA at 125°C ambient - due to internal current limiting that protects the DMOS transistors. The TLC6C598QDRQ1 maintains safe operation under sustained loads within its thermal limits when properly heatsinked.
Does TLC6C598QDRQ1 support daisy-chaining with other identical devices?
Yes, the TLC6C598QDRQ1 supports reliable daisy-chaining via its SER_OUT pin, which outputs shifted data on the falling edge of SRCK. This phase inversion provides extra setup time for the next device's SER_IN input, preventing timing violations in multi-stage configurations. The TLC6C598QDRQ1 has been validated in cascaded topologies up to 16+ devices in automotive lighting reference designs.
What is the purpose of the G (output enable) pin on TLC6C598QDRQ1?
The G pin on TLC6C598QDRQ1 is an active-low global output enable that overrides the storage register state: when G is high, all DRAINx outputs are forced low (off); when G is low, output states reflect the stored latch data. This enables hardware-level PWM dimming, emergency shutdown, or blanking without altering shift register contents - a key feature used in TLC6C598QDRQ1-based instrument cluster designs.
Is TLC6C598QDRQ1 qualified for automotive use?
Yes, the TLC6C598QDRQ1 is AEC-Q100 qualified for Automotive Grade 1 (−40°C to +125°C ambient), with HBM ESD rating of ±2000 V and CDM rating of ±750 V. It includes thermal shutdown, 40 V drain voltage tolerance, and production validation across temperature, humidity, and vibration stress tests - making it suitable for front-end lighting, dashboard, and body control module applications.
How does thermal shutdown work in TLC6C598QDRQ1?
The TLC6C598QDRQ1 incorporates an internal thermal sensor that triggers shutdown at ~175°C junction temperature, forcing all DRAINx outputs into high-impedance (open) state. Once junction temperature falls below ~160°C (15°C hysteresis), normal operation resumes automatically. This behavior is documented in the TLC6C598QDRQ1 datasheet Section 8.3.1 and prevents irreversible damage during overload or inadequate PCB thermal design.
TLC6C598QDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Power Switch
- Topology:
- Shift Register
- Internal Switch(s):
- Yes
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 40V
- Current - Output / Channel:
- 50mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
TLC6C598QDRQ1 FAQ
1.How can I place an order for TLC6C598QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC6C598QDRQ1 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 TLC6C598QDRQ1 reliable?
The price and inventory of TLC6C598QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC6C598QDRQ1 is usually 5 days.
3.What payment methods are accepted for TLC6C598QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC6C598QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC6C598QDRQ1?
TLC6C598QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC6C598QDRQ1 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 TLC6C598QDRQ1?
For technical support, including TLC6C598QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC6C598QDRQ1 requirements.
6.How does Aetrix verify that TLC6C598QDRQ1 is sourced from the original manufacturer or authorized distributors?
All TLC6C598QDRQ1 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 TLC6C598QDRQ1 meets industry standards.
7.What is the process for return or replacement of TLC6C598QDRQ1?
All TLC6C598QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLC6C598QDRQ1, 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 TLC6C598QDRQ1 part is unused and in its original packaging.
Return procedure for TLC6C598QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC6C598QDRQ1 Tags
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