TLD21421EPXUMA1 - 180mA Linear LED Driver AEC-Q100 | Infineon
MPN: TLD21421EPXUMA1 ✓ فعالTLD21421EPXUMA1 جائزہ
A linear LED driver is a type of constant-current source that regulates LED brightness by dissipating excess input voltage as heat across an internal pass element, as opposed to a switching driver that stores energy in an inductor. Linear drivers are simpler, EMI-quiet, and free of inductive ringing, making them ideal for safety-relevant automotive lighting and small-form-factor lamp modules where the VIN-VLED differential is modest.
Key features of the TLD21421EPXUMA1 include 180 mA programmable output current via an external sense resistor, integrated reverse-polarity protection, load-dump robustness up to 40 V on the supply pin, overtemperature shutdown with auto-recovery, and a single-channel topology that drives one LED string. The exposed thermal pad of the PG-TSDSO-14 package enables efficient heat removal, which is critical for linear drivers that absorb the full input-to-LED voltage difference. The device also provides a status/diagnostic output for fault feedback to the ECU.
The TLD21421EPXUMA1 uses a current-control loop referenced to an internal bandgap, with a sense resistor on a dedicated pin setting the regulated output current. Output current accuracy is typically within +/-3% across temperature, ensuring uniform brightness between LED modules. The integrated protection block includes open-LED detection, short-to-ground detection, and thermal derating, all critical for ISO 26262 functional-safety analysis in body and lighting ECUs.
Typical applications include automotive tail-light and brake-light clusters, turn signals, daytime running lights (DRL), interior ambient lighting, and two-wheeler rear lamps. The 5.5 V to 40 V input range covers 12 V and 24 V vehicle buses directly, eliminating the need for a pre-regulator. The PWM dimming input allows flicker-free brightness control for both headlamp leveling and animated indicator functions.
When designing with this device, calculate power dissipation as (VIN - VLED) x ILED and confirm that the exposed pad receives adequate copper area to keep junction temperature below 150 C. The 14-pin TSSOP exposed-pad footprint also requires that the PCB land pattern uses thermally enhanced vias under the e-pad to conduct heat into inner copper planes.
This page synthesizes distributor pricing, AEC-Q100 qualification details, drop-in compatible LITIX family variants, and practical PCB thermal design notes not consolidated on any single distributor or manufacturer page.
کے لیے ڈراپ اِن متبادل TLD21421EPXUMA1 — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں TLD21421EPXUMA1 (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Operating Temperature Range, Package, Topology, Dimming Method, Number of Outputs.
TLD2141-3EP
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
TLD2331-3EP
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
TLD1114-1EP
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
TLD21421EPXUMA1 زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| ٹوپولوجی | Linear Constant-Current LED Driver |
| آؤٹ پٹس کی تعداد | 1 |
| آؤٹ پٹ کرنٹ (زیادہ سے زیادہ) | 180 mA |
| Supply Voltage Range | 5.5 V to 40 V |
| Maximum Output Voltage | 40 V |
| Dimming Method | PWM (external) |
| آپریٹنگ درجہ حرارت رینج | -40 C to +150 C |
| پیکیج | PG-TSDSO-14 (TSSOP-14-EP, 150 mil) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| AEC-Q100 Qualification | Qualified |
| Product Family | LITIX Basic+ |
| Diagnostic Output | Yes (fault flag) |
| Thermal Protection | Overtemperature shutdown with auto-recovery |
| Reverse Polarity Protection | Yes (integrated) |
| Load Dump Robustness | Yes (up to 40 V on VS) |
| MSL لیول | 3 |
| RoHS اسٹیٹس | Compliant |
TLD21421EPXUMA1 پن کنفیگریشن
| پن 1 | VS — Supply voltage (5.5 V to 40 V) |
| پن 2 | GND — Ground |
| پن 3 | OUT — LED string current output |
| پن 4 | ISENSE — External sense resistor to set LED current |
| پن 5 | PWMDIM — PWM dimming input |
| پن 6 | DIAG — Diagnostic fault output (open drain) |
| پن 7 | ST — Status / enable input |
| پن 8 | IN — Logic input reference |
| پن 9 | NC — Not connected (per datasheet) |
| پن 10 | NC — Not connected (per datasheet) |
| پن 11 | NC — Not connected (per datasheet) |
| پن 12 | NC — Not connected (per datasheet) |
| پن 13 | NC — Not connected (per datasheet) |
| پن 14 | NC — Not connected (per datasheet) |
عام استعمالات
TLD21421EPXUMA1 کے لیے موزوں ہے 6 ایپلیکیشنs: Automotive Tail-Light and Brake-Light Clusters, Daytime Running Lights (DRL), Turn Signal and Indicator Lamps, Automotive Interior Ambient Lighting, Two-Wheeler and Powersport Rear Lamps, Status and Indicator LED Panels.
Automotive Tail-Light and Brake-Light Clusters
The TLD21421EPXUMA1 directly drives a single LED string for automotive rear-lighting clusters, with 180 mA output matching typical high-brightness LED requirements. Its 5.5 V to 40 V input range covers 12 V and 24 V vehicle buses without a pre-regulator, and AEC-Q100 qualification allows deployment in safety-relevant exterior lamps. The linear topology eliminates inductor switching noise, simplifying EMC compliance for CISPR 25 Class 5 lamp modules.
تجویز کردہ
Daytime Running Lights (DRL)
For DRL strings that demand precise constant current and high reliability, the TLD21421EPXUMA1 provides 180 mA with +/-3% accuracy across temperature, ensuring uniform brightness across the lamp module. The exposed-pad TSSOP-14 package dissipates the VIN-VLED differential efficiently, and the PWM dimming input enables DRL/position-light switching without flicker. AEC-Q100 grade 1 supports under-hood mounting conditions.
تجویز کردہ
Turn Signal and Indicator Lamps
The TLD21421EPXUMA1's PWM dimming capability makes it well-suited for animated or sequential turn signal indicators, where PWM duty-cycle control produces smooth fade-in/out transitions. The integrated diagnostic output provides fault feedback to the body-control module, supporting turn-signal failure detection required by ECE R48 and FMVSS 108 regulations. The 40 V load-dump tolerance absorbs 12 V jump-start and transient events.
تجویز کردہ
Automotive Interior Ambient Lighting
Interior ambient strips require compact linear drivers with low EMI. The TLD21421EPXUMA1 in TSSOP-14-EP is small enough for in-door-trim PCBAs and produces no switching ripple that could couple into audio or RF circuits nearby. PWM dimming allows smooth brightness sweeps for mood lighting, and AEC-Q100 qualification ensures reliability across cabin temperature extremes of -40 C to +85 C ambient.
تجویز کردہ
Two-Wheeler and Powersport Rear Lamps
Motorcycles, scooters, and ATVs use 12 V electrical systems with compact lamp housings. The TLD21421EPXUMA1's small TSSOP-14-EP footprint and linear topology suit vibration-prone environments where inductors can fail, while AEC-Q100 grade 1 temperature range tolerates engine-bay heat. 180 mA drives high-brightness LED replacements for legacy incandescent bulbs without re-engineering the wiring harness.
تجویز کردہ
Status and Indicator LED Panels
Industrial control panels and HMI backlights use constant-current LED drivers for uniform indicator brightness. The TLD21421EPXUMA1 provides 180 mA with PWM dimming for adjustable backlight intensity, and its diagnostic output flags open-LED faults for predictive maintenance. The TSSOP-14-EP exposed pad enables high-density PCB layouts in space-constrained panel designs.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا TLD21421EPXUMA1 — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | TLD2141-3EP | TLD2331-3EP | TLD1114-1EP |
|---|---|---|---|---|
| Package | PG-TSDSO-14 (TSSOP-14-EP) | PG-TSDSO-14 (TSSOP-14-EP) | PG-TSDSO-14 (TSSOP-14-EP) | PG-TSDSO-14 (TSSOP-14-EP) |
| Brand | Infineon | Infineon | Infineon | Infineon |
| Number of Channels | 1 | 3 | 3 | 1 |
| Supply Voltage Range | 5.5 V to 40 V | 5.5 V to 40 V | 5.5 V to 40 V | 5.5 V to 40 V |
| AEC-Q100 Qualification | Yes | Yes | Yes | Yes |
| Topology | Linear constant-current | Linear constant-current | Linear constant-current | Linear constant-current |
| PWM Dimming | Yes (external PWMDIM) | Yes (external) | Yes (external) | Yes (external) |
| Product Family | LITIX Basic+ | LITIX Basic+ | LITIX Basic+ | LITIX Basic+ |
اہم امتیازی خصوصیات
- Single-channel 180 mA in compact TSSOP-14-EP (بمقابلہTLD2331-3EP)
- LITIX Basic+ family integration with diagnostic output (بمقابلہDiscrete transistor LED driver)
- PWM dimming without external MOSFET (بمقابلہTLD1114-1EP)
ڈیزائن نوٹس
Estimated: at VIN = 13.5 V (running vehicle), VLED = 8 V (3x white LEDs), and ILED = 180 mA, the TLD21421EPXUMA1 dissipates approximately (13.5 - 8) x 0.18 = 0.99 W. With the TSSOP-14-EP exposed pad soldered to at least 1 cm^2 of 1 oz copper on a 4-layer board, theta_JA is approximately 35 C/W, giving a 35 C junction rise above ambient. For higher VIN or larger VLED stacks, expand the copper area under the e-pad and use thermal vias to inner planes to keep Tj below 150 C.
Route the ISENSE trace as a Kelvin connection directly to the sense resistor pads to avoid ground-loop errors that affect output current accuracy. Place input and output capacitors within 3 mm of the VS and OUT pins to minimize parasitic inductance. The exposed thermal pad MUST be soldered to a copper land pattern with thermal vias (typically 9-12 vias, 0.3 mm drill) to comply with Infineon's recommended land pattern and achieve rated thermal performance.
Do not exceed 40 V on the VS pin even briefly - load-dump pulses above 40 V require an external TVS clamp (e.g., SMBJ33A) at the supply input. Ensure the PWMDIM pin is not left floating; tie to VS through a pull-up or to GND when not used, otherwise the driver may enter an undefined state. Verify that the sense resistor is rated for the expected power dissipation and that its tolerance is 1% or better to maintain +/-3% LED current accuracy.
The TLD21421EPXUMA1 is a linear driver and inherently EMI-quiet, but high dv/dt on the PWMDIM pin can still couple into nearby RF circuits. Place the IC away from AM/FM antenna traces and add a small RC filter (10 kohm + 100 pF) on PWMDIM if the dimming signal originates from a long harness. For 12 V/24 V bus inputs, add a 100 nF X7R bypass cap directly at the VS pin to suppress conducted emissions above 30 MHz.
تعمیل کی معلومات
AEC-Q100 qualified for automotive applications per Infineon datasheet. RoHS and lead-free confirmed via JLCPCB and distributor listings. Halogen-free status not explicitly stated in available web data - verify with manufacturer.
