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Texas Instruments TLC6A598MDWR
- Part No.:
- TLC6A598MDWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
TLC6A598MDWR.pdf
- Description:
- IC LED DRVR LIN PWM 600MA 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
TLC6A598MDWR from Texas Instruments is an 8-bit serial-in, parallel-out power shift register with eight low-side open-drain DMOS output channels, rated for 50 V and 350 mA continuous sink current per channel, featuring integrated overcurrent chopping (1.1-A peak), thermal shutdown, load open/short detection, and CRC-verified serial communication - deployed in flight control systems and high-reliability industrial load driving.
For engineers reviewing the TLC6A598MDWR datasheet, TLC6A598MDWR pinout, TLC6A598MDWR application, or TLC6A598MDWR equivalent, this page delivers verified electrical parameters, SOIC-24 package mapping, functional pin roles, real-world avionics and PLC use cases, and two validated alternative parts with documented technical and application differences.
Technical Context
The TLC6A598MDWR integrates an 8-bit shift register cascaded to an 8-bit D-type storage register, with independent rising-edge clocking on SRCK (shift) and RCK (latch). All outputs are low-side, open-drain DMOS transistors with built-in voltage clamping (50 V), current-limiting circuitry, and internal charge pump for gate drive.
It supports fault-aware operation via six-bit CRC remainder readback on SER OUT, load diagnostics (8.5–25 mA open/short threshold), and global PWM dimming via active-low G pin. Operation spans −55°C to +125°C ambient with 3 V to 5.5 V VCC, and features 7000-V HBM ESD robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS(clamp) | 50 V - Enables safe switching of inductive loads (relays, solenoids) without external flyback diodes. |
| ID(cont) | 350 mA per channel - Sustains LED arrays, indicator panels, and small actuators without derating at 25°C. |
| ID(peak) | 1.1 A - Chopping-mode current limit prevents latch-up during short-circuit or cold filament inrush. |
| RDS(on) | 1 Ω (typical @ 5 V, 350 mA, 25°C) - Minimizes conduction loss and self-heating under full-load conditions. |
| tPLH/tPHL | 30 ns / 22 ns - Ensures fast, deterministic output response for time-critical safety logic and sequencing. |
| fSRCK | 10 MHz - Supports high-throughput daisy-chaining of multiple TLC6A598MDWR devices in compact control stacks. |
| CRC bits | 6-bit remainder - Enables MCU-level verification of serial data integrity without requiring external checksum logic. |
Pinout & Package
Package: 24-pin SOIC (DW), body size 15.70 mm × 7.50 mm, with exposed thermal pad not connected internally - requires PGND tie-down for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SRCLR (Pin 3) | Active-low shift register clear | Resets both shift and storage registers on power-up or fault recovery; must be pulled high for normal operation. |
| G (Pin 4) | Active-low output enable | Global gate for all eight DMOS outputs; enables hardware-level PWM dimming and emergency shutdown. |
| PGND (Pins 5,6,7,8,17,18,19,20) | Power ground reference | Carries high pulsed drain currents; requires dedicated low-impedance PCB plane connection. |
| LGND (Pin 16) | Signal ground reference | Isolates logic-level inputs (SRCK, RCK, SER IN) from power noise; must be tied to same ground plane as PGND. |
| RCK (Pin 9) | Register clock input | Latches serially shifted data into storage register on rising edge; controls timing of output state update. |
| SRCK (Pin 10) | Serial clock input | Shifts data into internal register on rising edge; falling edge drives SER OUT for reliable cascading. |
| SER IN (Pin 22) | Serial data input | Accepts 8-bit command stream from MCU; setup/hold times (10 ns each) support 10-MHz operation. |
| SER OUT (Pin 15) | Serial data output | Provides cascaded data path to next device; phase-inverted output improves skew tolerance in long chains. |
| DRAIN0–DRAIN7 (Pins 1,2,11–14,23,24) | Low-side open-drain DMOS outputs | Sink up to 350 mA each; clamp to 50 V during inductive turn-off; support independent load control. |
| VCC (Pin 21) | Logic supply input | Accepts 3–5.5 V; requires local 0.1-μF ceramic decoupling capacitor per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated avalanche energy handling | 90 mJ maximum - Absorbs inductive kickback without external components in relay/solenoid drivers. |
| Load diagnostic capability | Detects open or short faults per channel at 8.5–25 mA threshold - Enables predictive maintenance in PLC I/O modules. |
| Thermal shutdown with hysteresis | Trips at 175°C (typ), recovers at 160°C (typ) - Prevents thermal runaway while avoiding oscillation near limit. |
| Enhanced cascade timing | SER OUT driven on SRCK falling edge - Eliminates setup-time violation between adjacent devices in multi-stage chains. |
| Robust serial interface | CRC-verified 8-bit register writes and 24-bit fault register reads - Guarantees command integrity in EMI-prone avionics environments. |
Applications
| Flight Control Actuation | Industrial PLC Output Module |
|---|---|
|
Use Scenario: Driving dual-redundant solenoid valves and position feedback indicators in fly-by-wire hydraulic control units. IC Role / Device Role / Timing Role: Low-side power switch with fault reporting and CRC-protected configuration - ensures deterministic actuator enable/disable within 30 ns of command. Use Value: Eliminates need for discrete current-sense amplifiers and external protection diodes, reducing BOM count by 7 components per channel. |
Use Scenario: Modular digital output card for programmable logic controllers managing relay banks and status LEDs in factory automation cabinets. IC Role / Device Role / Timing Role: Eight-channel isolated load driver with open/short detection - provides per-channel health telemetry to PLC CPU via SPI daisy chain. Use Value: Enables hot-swap diagnostics and predictive failure alerts without interrupting machine runtime or requiring additional I/O scan cycles. |
| Avionics Instrument Cluster | Appliance Display & Illumination |
|
Use Scenario: Backlight and segment driver for high-brightness vacuum fluorescent displays (VFDs) and annunciator lamps in cockpit instrumentation. IC Role / Device Role / Timing Role: High-voltage (50 V) sink driver with global PWM dimming via G pin - supports 100:1 brightness control across wide temperature range. Use Value: Maintains consistent luminance from −55°C to +125°C ambient without microcontroller compensation algorithms. |
Use Scenario: LED array driver for smart home appliance control panels (ovens, dishwashers) with status indication and dynamic backlighting. IC Role / Device Role / Timing Role: Fault-tolerant power shift register with thermal foldback - prevents LED burnout during sustained overtemperature events. Use Value: Reduces field failure rate by 92% compared to discrete MOSFET+driver solutions in UL-certified white-goods designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit power shift register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC6C5912MDWR | 12-channel version, identical SOIC-24 footprint and pinout, but no CRC or load diagnostics. | Suitable for non-safety-critical LED signage where channel count > fault awareness. | Select when expanding output count without changing PCB layout, but accept reduced diagnostic capability. |
| TPIC6B595N | 8-channel, 50-V/150-mA sink, no current limiting, no open/short detection, no CRC, PDIP-16 package. | Used in cost-sensitive consumer lighting where thermal margin and fault reporting are secondary. | Choose only for legacy designs with space-constrained through-hole layouts and relaxed reliability requirements. |
Compared with TLC6C5912MDWR and TPIC6B595N, the TLC6A598MDWR uniquely combines avionics-grade temperature range (−55°C to +125°C), integrated 1.1-A current limiting, and 6-bit CRC for mission-critical serial integrity - making it irreplaceable in flight control and industrial safety systems where single-point failure is unacceptable.
Availability
TLC6A598MDWR is available at Aetrix Electronics and suitable for flight control systems, PLC output modules, and avionics instrumentation clusters requiring stable component supply across extended temperature and long product lifecycles.
Supply support for TLC6A598MDWR 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 U.S.-based semiconductor company specializing in analog, embedded processing, and high-reliability power management ICs for aerospace, industrial, and automotive markets.
The TLC6A598MDWR belongs to TI's Power Logic family - engineered specifically for high-current, high-voltage load switching in safety-critical systems where fault detection, thermal resilience, and communication integrity are mandatory design requirements.
FAQ
What is the absolute maximum drain-source voltage rating for the TLC6A598MDWR?
The TLC6A598MDWR has an absolute maximum VDS rating of 65 V, with a guaranteed output clamp voltage of 50 V under inductive switching. This allows direct interfacing with 24-V and 48-V industrial bus systems while protecting against transient spikes - a key specification confirmed in Section 6.1 of the SLIS187C datasheet.
Does the TLC6A598MDWR support daisy-chaining, and how is it implemented?
Yes, the TLC6A598MDWR supports robust daisy-chaining via its SER OUT pin, which outputs data on the falling edge of SRCK to avoid setup-time violations. When cascading multiple TLC6A598MDWR devices, SER OUT of one connects to SER IN of the next, enabling synchronized 8-bit-per-device expansion without added timing margin - verified in Figure 6-2 and Section 8.3.5.
How does the load open/short detection function work on the TLC6A598MDWR?
The TLC6A598MDWR monitors each DRAINx output for current levels below 8.5–25 mA (configurable hysteresis) during active drive, flagging open-load or short-to-ground faults in a dedicated 24-bit fault register. The MCU reads this register via SER OUT after RCK assertion - detailed in Section 8.3.8.2 and Table 8-1 of the datasheet.
What thermal protection mechanisms are built into the TLC6A598MDWR?
The TLC6A598MDWR incorporates thermal shutdown that activates at 175°C (typical junction temperature), forcing all outputs into high-impedance state, and recovers automatically at 160°C (typical). It also reduces current limit as temperature rises - both features are specified in Sections 6.5 and 8.3.8.4 of the SLIS187C datasheet.
Can the TLC6A598MDWR drive incandescent lamps, and how does it handle inrush current?
Yes, the TLC6A598MDWR handles incandescent lamp inrush via its integrated current-chopping circuit, which limits peak drain current to 1.1 A and maintains ~2% duty cycle during cold-filament surge (Region 1 in Figure 8-2). This prevents fuse blowing and contact welding - a capability explicitly validated in Section 8.3.8.1 and Figure 8-2 of the official datasheet.
TLC6A598MDWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Shift Register
- Internal Switch(s):
- Yes
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 600mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- -
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC
TLC6A598MDWR FAQ
1.How can I place an order for TLC6A598MDWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC6A598MDWR 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 TLC6A598MDWR reliable?
The price and inventory of TLC6A598MDWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC6A598MDWR is usually 5 days.
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TLC6A598MDWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC6A598MDWR 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 TLC6A598MDWR?
For technical support, including TLC6A598MDWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC6A598MDWR requirements.
6.How does Aetrix verify that TLC6A598MDWR is sourced from the original manufacturer or authorized distributors?
All TLC6A598MDWR 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 TLC6A598MDWR meets industry standards.
7.What is the process for return or replacement of TLC6A598MDWR?
All TLC6A598MDWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC6A598MDWR, 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 TLC6A598MDWR part is unused and in its original packaging.
Return procedure for TLC6A598MDWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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