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STMicroelectronics E-L6574D013TR
- Part No.:
- E-L6574D013TR
- Manufacturer:
- STMicroelectronics
- Category:
- Lighting, Ballast Controllers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
E-L6574D013TR.pdf
- Description:
- IC CFL/TL CNTRL 120KHZ 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,543
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Product details
Overview
E-L6574D013TR from STMicroelectronics is a high-voltage fluorescent lamp ballast controller IC designed for half-bridge resonant inverters driving CFL/TL lamps. It integrates dual MOSFET gate drivers (250mA source / 450mA sink), a current-controlled oscillator with preheat and frequency-shift timing, a dedicated sense op amp for closed-loop lamp current control, integrated bootstrap DMOS, and ±50 V/ns dV/dt immunity - enabling robust operation in 600V rail applications such as electronic ballasts for commercial lighting.
For engineers reviewing the E-L6574D013TR datasheet, E-L6574D013TR pinout, E-L6574D013TR application in CFL ballasts, or E-L6574D013TR equivalent for lamp ignition control, this page delivers verified specifications, SO16/DIP16 package mapping, functional pin roles, real-world timing behavior (tPRE = 1.5 s/µF × CPRE), and validated alternatives for lamp preheat and dimming systems.
Technical Context
The L6574 implements a dual-stage timing architecture: CPRE sets preheat duration (tPRE) via fixed-current charging to 3.5V threshold, then shifts frequency via RPRE-dependent current for tSH = 0.1 × tPRE. Its VCO supports independent fPRE (120 kHz typ.) and fIGN (60 kHz typ.) set by CF, RPRE, and RIGN - enabling open-loop ignition and closed-loop regulation via OPAMP feedback to the RING pin.
The integrated bootstrap section replaces external diodes using a synchronously driven HV DMOS between VBOOT and VS, with internal clamping on VS (15.6V typ.) and dV/dt immunity up to ±50 V/ns across full –40°C to +125°C ambient range. EN1/EN2 comparators (0.6V threshold, 20–100mV hysteresis) provide latched shutdown and restart capability for lamp fault recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| High-Voltage Rail | Rated for 600V operation; supports direct connection to rectified mains in offline ballast designs. |
| Driver Output Current | 250mA source / 450mA sink per driver - sufficient to drive size-4 MOSFETs with <120ns rise/fall times into 1nF load. |
| Oscillator Frequency Range | fPRE = 120 kHz (typ.), fIGN = 60 kHz (typ.) - programmable via CF, RPRE, RIGN for preheat-to-ignition transition. |
| Preheat Timing Constant | KPRE = 1.5 s/µF - enables precise tPRE setting (e.g., 450ms with 330nF capacitor) independent of supply variation. |
| Sense Op Amp GBW | 1 MHz gain-bandwidth product - supports stable closed-loop lamp current regulation with <10mV offset and 0.1µA bias current. |
| dV/dt Immunity | ±50 V/ns at VBOOT and OUT pins - ensures noise-immune operation in high-slew-rate half-bridge switching environments. |
| UVLO Threshold | Turn-on at 10.2V, turn-off at 8.0V, 2.2V hysteresis - prevents erratic startup during brownout conditions. |
Pinout & Package
Available in SO16 narrow (body: 10.0 × 6.0 mm) and DIP16 (body: 20.0 × 8.5 mm) packages, both with standard 1.27 mm pitch; thermal resistance: 80°C/W (DIP16), 120°C/W (SO16N).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CPRE | Preheat timing capacitor node | Charged to 3.5V for tPRE; recharged at reduced rate for tSH = 0.1 × tPRE - enables lamp filament preheating before high-voltage ignition. |
| 2 RPRE | fPRE–fIGN delta setting resistor | Sets frequency shift magnitude; voltage clamped to 2.0V during steady state - defines ignition margin over preheat frequency. |
| 5 OPOUT | Op amp output | Drives RING pin via RC network to modulate VCO frequency - enables real-time lamp current regulation during burn phase. |
| 11 LVG | Low-side gate driver output | Directly drives low-side MOSFET gate; 450mA sink capability ensures fast turn-off and ZVS-compatible switching. |
| 15 HVG | High-side gate driver output | Drives high-side MOSFET gate referenced to floating VS node; synchronized with LVG to enable bootstrap capacitor recharge. |
| 16 VBOOT | Bootstrap supply input | Connects to bootstrap capacitor; internal HV DMOS replaces external diode - reduces BOM count and improves reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap DMOS | Eliminates external bootstrap diode and Zener clamp on VS - reduces component count by ≥2 and improves thermal stability. |
| Dual enable inputs (EN1/EN2) | EN1 provides latched shutdown on critical faults (e.g., lamp removal); EN2 restarts preheat without power cycle - enhances system recoverability. |
| Programmable preheat & frequency shift | tPRE and tSH derived from single CPRE capacitor with factory-trimmed KPRE/KFS constants - ensures repeatable lamp ignition across temperature. |
| High-accuracy current-controlled oscillator | fPRE/fIGN accuracy ±3% over temperature - maintains consistent lamp power delivery and avoids acoustic resonance in magnetic components. |
| Wide common-mode op amp input range | –0.2V to 3.0V at OPIN+/OPIN– - enables direct sensing of current shunt signals referenced to VS or GND without level-shifting circuitry. |
Applications
| Commercial Fluorescent Lighting | Compact Fluorescent Lamp (CFL) Ballasts |
|---|---|
|
Use Scenario: Electronic ballast for T8/T5 linear fluorescent tubes in office ceiling fixtures. IC Role / Device Role / Timing Role: Half-bridge controller managing preheat (450–900ms), ignition (frequency shift), and regulated burn (60kHz PWM). Use Value: Enables flicker-free start-up and >20,000-hour lamp life via precise filament heating and closed-loop current control. |
Use Scenario: Integrated CFL retrofit lamp with built-in ballast electronics. IC Role / Device Role / Timing Role: Primary timing and drive controller coordinating MOSFET switching, preheat ramp, and post-ignition dimming. Use Value: Reduces bill-of-materials by integrating bootstrap diode, UVLO, op amp, and dual drivers - critical for space-constrained lamp bases. |
| LED Driver Auxiliary Control | Industrial UV Curing Systems |
|
Use Scenario: Hybrid driver combining LED arrays with fluorescent UV excitation sources in signage backlighting. IC Role / Device Role / Timing Role: Secondary ballast controller managing fluorescent UV tube ignition alongside primary LED PWM. Use Value: Provides independent timing control (tPRE, tSH, fIGN) without MCU intervention - simplifies multi-source lighting coordination. |
Use Scenario: High-intensity UV curing system using mercury vapor lamps requiring controlled preheat and stable arc maintenance. IC Role / Device Role / Timing Role: Resonant inverter controller ensuring reliable cold-start ignition and current-regulated burning under varying load impedance. Use Value: Delivers ±50 V/ns dV/dt immunity and 600V rail tolerance - essential for stable operation near high-frequency plasma arcs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fluorescent lamp ballast control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR2153(D)(PbF) | Lacks integrated op amp, preheat timing, and frequency shift logic; requires external RC networks for soft-start. | Suitable only for basic half-bridge drive without closed-loop lamp regulation or programmable ignition timing. | Select when cost sensitivity outweighs need for lamp life optimization and dimming capability. |
| UCC3895N | Phase-shifted full-bridge controller; no built-in bootstrap DMOS or lamp-specific timing blocks (CPRE/RPRE). | Targeted at high-efficiency SMPS, not resonant lamp ballasts - lacks preheat comparator and VCO architecture for fPRE/fIGN transition. | Choose only for non-lamp resonant DC-DC topologies where ZVS control and adaptive dead time are priorities. |
Compared with IR2153 and UCC3895, the E-L6574D013TR uniquely integrates lamp-specific timing, closed-loop op amp control, and bootstrap DMOS - delivering plug-and-play ballast functionality with fewer external components and superior ignition reliability.
Availability
E-L6574D013TR is available at Aetrix Electronics and suitable for commercial lighting ballasts, compact fluorescent lamp (CFL) modules, and industrial UV curing systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.
Supply support for E-L6574D013TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, and automotive-grade ICs with vertical manufacturing capabilities and AEC-Q100 qualified processes.
The L6574 belongs to ST's dedicated lighting control product line, engineered specifically for energy-efficient fluorescent lamp ballasting - emphasizing integration of timing, protection, and driver functions to replace discrete solutions in cost-sensitive lighting applications.
FAQ
What is the purpose of the CPRE pin and how does it affect lamp ignition?
The CPRE pin connects to an external capacitor that sets both preheat duration (tPRE) and frequency-shift time (tSH = 0.1 × tPRE). During tPRE, CPRE charges to 3.5V at a fixed current, holding the oscillator at fPRE; upon reaching threshold, it discharges and recharges at a lower rate to execute tSH while shifting frequency toward fIGN - ensuring safe filament heating before high-voltage ignition.
Can the E-L6574D013TR operate without an external bootstrap diode?
Yes - the IC integrates a patented high-voltage DMOS bootstrap switch that replaces the external diode. This DMOS is driven synchronously with the low-side gate driver (LVG), automatically recharging the bootstrap capacitor during each low-side conduction period - eliminating diode forward drop, leakage, and thermal derating concerns.
How does the integrated op amp enable closed-loop lamp current control?
The op amp (pins OPIN+, OPIN−, OPOUT) monitors lamp current via a shunt resistor and feeds its output through an RC network to the RING pin. This modulates the VCO's control voltage, dynamically adjusting oscillation frequency to maintain constant lamp power - compensating for aging, temperature drift, and line voltage variations without external microcontroller intervention.
What protection features are implemented on EN1 and EN2 pins?
EN1 is a latched shutdown input (threshold 0.6V) triggered by faults like lamp removal or overvoltage; recovery requires either a full power cycle or assertion of EN2. EN2 (also 0.6V threshold) restarts the full preheat–ignition sequence - providing field-serviceable recovery without hardware reset, unlike EN1's safety-critical latch behavior.
E-L6574D013TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- CFL/TL Controller
- Frequency:
- 60kHz ~ 120kHz
- Voltage - Supply:
- 10V ~ 15.6V
- Current - Supply:
- 2 mA
- Current - Output Source/Sink:
- -
- Dimming:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
E-L6574D013TR FAQ
1.How can I place an order for E-L6574D013TR through Aetrix?
Please submit a Request for Quotation (RFQ) for E-L6574D013TR 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 E-L6574D013TR reliable?
The price and inventory of E-L6574D013TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for E-L6574D013TR is usually 5 days.
3.What payment methods are accepted for E-L6574D013TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for E-L6574D013TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for E-L6574D013TR?
E-L6574D013TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your E-L6574D013TR 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 E-L6574D013TR?
For technical support, including E-L6574D013TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your E-L6574D013TR requirements.
6.How does Aetrix verify that E-L6574D013TR is sourced from the original manufacturer or authorized distributors?
All E-L6574D013TR 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 E-L6574D013TR meets industry standards.
7.What is the process for return or replacement of E-L6574D013TR?
All E-L6574D013TR units undergo pre-shipment inspection (PSI). If there is an issue with E-L6574D013TR, 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 E-L6574D013TR part is unused and in its original packaging.
Return procedure for E-L6574D013TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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