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Diodes Incorporated ZXLD1362ET5TA
- Part No.:
- ZXLD1362ET5TA
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
ZXLD1362ET5TA.pdf
- Description:
- IC LED DRVR RGLTR PWM 1A TSOT25
- Quantity:
- Payment:
- Shipping:
Inventory:13,093
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Product details
Overview
ZXLD1362ET5TA from Diodes Incorporated is a continuous-mode inductive step-down LED driver IC with integrated 1.25A NDMOS switch and high-side current sensing. It operates from 6V to 60V input, delivers up to 1A adjustable LED output current, features AEC-Q100 Grade 1 qualification (−40°C to +125°C), and supports dual-mode brightness control via DC voltage or PWM on the ADJ pin. It is used in automotive exterior lighting systems requiring robust, thermally efficient constant-current regulation.
For engineers reviewing the ZXLD1362ET5TA datasheet, ZXLD1362ET5TA pinout, ZXLD1362ET5TA application, or ZXLD1362ET5TA equivalent, this page provides verified technical context, validated pin functions, confirmed thermal performance (θJA = 82°C/W), real-world current accuracy (±2% typical), and AEC-Q100-compliant operating boundaries - all critical for automotive LED headlamp and DRL design validation.
Technical Context
The ZXLD1362ET5TA implements a self-oscillating buck topology using internal comparator hysteresis (±10% of VADJ) and fixed 100mV current-sense threshold referenced to VIN at the ISENSE pin. Its switching frequency varies with input voltage and LED string count (e.g., 300 kHz at 24V/3 LEDs), and minimum on/off times are 130 ns / 70 ns respectively.
Control is centralized on the ADJ pin: floating for nominal operation (VADJ = 1.25V), <0.2V for shutdown (65–90 µA quiescent current), 0.3–2.5V DC for 25–200% current scaling, or PWM for 1000:1 dimming range. The internal 50kΩ pull-up to VREF enables direct microcontroller or open-collector transistor drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 60V - supports 12V/24V/48V automotive battery rails with transient tolerance up to 65V. |
| Max Output Current | 1A continuous - sets upper limit for single or multi-LED strings without external current amplification. |
| Current Sense Threshold | 100 mV ±5 mV (at ISENSE w.r.t. VIN) - defines base LED current as IOUT = 0.1/RS, enabling ±2% accuracy with 0.1Ω RS. |
| Switch RDS(on) | 0.5–1.0 Ω @ ILX = 1A - determines conduction loss and thermal rise in TSOT25 package (θJA = 82°C/W). |
| Ambient Temp Range | −40°C to +125°C - qualified per AEC-Q100 Grade 1, enabling under-hood deployment without derating. |
| Dimming Control | PWM or DC on ADJ pin - achieves 1000:1 low-frequency dimming ratio or 5:1 analog range without external DAC. |
| Quiescent Current (Off) | 65–90 µA - ensures minimal battery drain during vehicle sleep mode when ADJ ≤ 0.2V. |
Pinout & Package
TSOT25 (3.0 × 1.7 × 0.9 mm) thermally enhanced lead-free package with exposed pad for improved heat dissipation (θJA = 82°C/W, θJB = 33°C/W). Pin 1 (LX) is source-connected to internal NDMOS; Pin 2 (GND) is power and signal ground reference; Pin 3 (ADJ) serves dual on/off and brightness control; Pin 4 (ISENSE) senses voltage drop across external RS resistor; Pin 5 (VIN) supplies full input rail.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX | Drain of integrated NDMOS switch | Connects to cathode of flyback diode and inductor; carries peak-switching current up to 1.25A. |
| GND | Power and signal ground reference | Must be low-impedance connection to PCB ground plane; shared return for sense and regulator circuits. |
| ADJ | Multi-function control input | Accepts DC (0.3–2.5V) or PWM to scale output current; <0.2V forces shutdown; internal 50kΩ pull-up to VREF. |
| ISENSE | High-side current sense input | Connected to RS resistor between VIN and this pin; measures 100mV threshold for LED current regulation. |
| VIN | Main power input | Supplies internal regulator and switch; requires ≥4.7µF X7R ceramic decoupling capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Single-pin brightness & on/off control | Eliminates separate enable and dimming lines - reduces BOM count and routing complexity in space-constrained modules. |
| Self-oscillating buck architecture | Removes need for external oscillator or timing components - simplifies layout and improves EMI predictability. |
| 1000:1 PWM dimming range | Enables precise low-light control in daytime running lights without visible flicker at frequencies >300Hz. |
| Thermally optimized TSOT25 | Delivers 1A output in 5-pin SMT package with 82°C/W junction-to-ambient thermal resistance - suitable for sealed headlamp housings. |
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient temperatures up to +125°C - eliminates need for additional thermal margin analysis in engine bay designs. |
Applications
| Automotive Headlamps | Truck Daytime Running Lights (DRL) |
|---|---|
Use Scenario: High-brightness LED arrays in projector-based headlamp modules requiring stable current over wide battery voltage swings (9–16V) and temperature extremes. IC Role / Device Role / Timing Role: Constant-current buck controller regulating 700mA–1A through 3–5 series white LEDs; LX switching frequency auto-adjusts to maintain regulation across input and load variations. Use Value: ±2% current accuracy ensures consistent lumen output and color point across production units; AEC-Q100 Grade 1 rating guarantees reliability in under-hood thermal environments. |
Use Scenario: Linear LED bar DRLs mounted on heavy-duty vehicle front fascias, powered directly from 24V chassis battery with cold-cranking tolerance. IC Role / Device Role / Timing Role: Primary LED current regulator with integrated switch; ADJ pin driven by MCU PWM for dynamic intensity modulation during vehicle startup/shutdown sequences. Use Value: 1000:1 dimming range enables seamless transition from parking light (5mA) to full DRL (1A); 60V max input withstands load-dump transients without external protection. |
| Commercial Vehicle Tail Lights | Industrial Hazard Lighting |
Use Scenario: Red LED brake/tail lamp clusters in buses and trailers where vibration, moisture, and wide ambient temperature ranges (−40°C to +85°C) demand high-reliability drivers. IC Role / Device Role / Timing Role: Standalone constant-current source driving 10–15 series red LEDs; GND-referenced ISENSE simplifies current sensing in high-side configured strings. Use Value: 1.25A switch rating allows parallel string support; shutdown current <90 µA minimizes parasitic drain on auxiliary batteries during long idle periods. |
Use Scenario: Explosion-proof LED warning beacons in oil & gas facilities requiring certified operation from 12–60V DC industrial power supplies. IC Role / Device Role / Timing Role: Isolated current regulator interfacing with 4–20mA control loop via ADJ pin voltage scaling; LX switching synchronized to avoid RF interference with nearby instrumentation. Use Value: Input range covers 24V/48V plant distribution; RoHS/halogen-free construction meets IEC 60079-0 intrinsic safety requirements for hazardous locations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8862SP-13 | Fixed-frequency (1MHz) synchronous buck; no integrated switch; requires external MOSFET and gate driver. | Higher efficiency (>96%) at light loads but needs more external components; lacks AEC-Q100 qualification. | Select when board space permits discrete FET selection and thermal management allows higher switching frequency. |
| LM3409QMY/NOPB | Adjustable-frequency (100kHz–1MHz) controller with external N-channel MOSFET; supports higher peak currents (2A+). | Requires external current sense amplifier and compensation network; qualified to AEC-Q100 Grade 1 but larger solution size. | Choose for designs needing >1A output or programmable frequency tuning to avoid EMI bands. |
Compared with ZXLD1362ET5TA, AL8862SP-13 offers higher-frequency operation but adds component count and lacks automotive qualification, while LM3409QMY/NOPB provides greater current scalability at the cost of increased design complexity and footprint - making ZXLD1362ET5TA optimal for compact, AEC-Q100-compliant 1A LED systems.
Availability
ZXLD1362ET5TA is available at Aetrix Electronics and suitable for automotive lighting, commercial vehicle signaling, and industrial hazard lighting requiring stable component supply across extended temperature and voltage ranges.
Supply support for ZXLD1362ET5TA 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.
The ZXLD1362 belongs to Diodes' AEC-Q100-qualified LED driver product line, engineered specifically for automotive exterior lighting applications demanding precision current regulation, wide input range, and robust thermal performance in harsh environments.
FAQ
What is the minimum sense resistor value for ZXLD1362ET5TA?
The minimum recommended RS is 0.1Ω when the ADJ pin is floating (VADJ = 1.25V), yielding 1A nominal output current. Using lower values risks exceeding the 1.25A absolute maximum LX switch current and violating thermal limits in the TSOT25 package. Derating is required below 16V input due to increased RDS(on).
How does the ADJ pin function in shutdown mode?
When the ADJ pin voltage falls below 0.2V (typical), the internal regulator and LX switch disable, reducing supply current to 65–90 µA. The internal 1.25V reference remains active to bias the shutdown circuit, ensuring fast wake-up response. No external pull-down is needed - grounding ADJ achieves reliable off-state.
Can ZXLD1362ET5TA drive multiple parallel LED strings?
No - the device regulates total current through a single series string only. Driving parallel strings would cause current imbalance due to VF mismatch, risking thermal runaway. For multi-string applications, use one ZXLD1362ET5TA per string or select a matrix-driver IC with individual channel control.
What is the impact of inductor value on ZXLD1362ET5TA performance?
Inductor value directly affects ripple current, switching frequency, and efficiency. At 68µH, typical operation is ~300 kHz with 3 LEDs at 24V; increasing inductance lowers frequency and ripple but raises duty cycle and conduction losses. Values from 68µH to 220µH are validated in the datasheet for stable operation across input and load conditions.
ZXLD1362ET5TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 6V
- Voltage - Supply (Max):
- 60V
- Voltage - Output:
- 65V
- Current - Output / Channel:
- 1A
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-25
ZXLD1362ET5TA FAQ
1.How can I place an order for ZXLD1362ET5TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ZXLD1362ET5TA 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 ZXLD1362ET5TA reliable?
The price and inventory of ZXLD1362ET5TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZXLD1362ET5TA is usually 5 days.
3.What payment methods are accepted for ZXLD1362ET5TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZXLD1362ET5TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZXLD1362ET5TA?
ZXLD1362ET5TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZXLD1362ET5TA 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 ZXLD1362ET5TA?
For technical support, including ZXLD1362ET5TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZXLD1362ET5TA requirements.
6.How does Aetrix verify that ZXLD1362ET5TA is sourced from the original manufacturer or authorized distributors?
All ZXLD1362ET5TA 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 ZXLD1362ET5TA meets industry standards.
7.What is the process for return or replacement of ZXLD1362ET5TA?
All ZXLD1362ET5TA units undergo pre-shipment inspection (PSI). If there is an issue with ZXLD1362ET5TA, 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 ZXLD1362ET5TA part is unused and in its original packaging.
Return procedure for ZXLD1362ET5TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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