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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Lighting, Ballast Controllers

NXP Semiconductors UBA2014T/N1,518

Name: UBA2014T/N1,518
Brand: NXP Semiconductors
SKU: UBA2014T/N1,518
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UBA2014T/N1,518

Manufacturer:: NXP Semiconductors

Category:: Lighting, Ballast Controllers

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: UBA2014T/N1,518.pdf

Description:: IC BALLAST CNTRL 100KHZ 16SO

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Product details

Overview

UBA2014T/N1,518 from NXP Semiconductors is a 600 V monolithic driver IC for high-frequency electronic fluorescent lamp ballasts operating up to 277 V_RMS mains. It integrates high-side/low-side gate drivers, voltage-controlled oscillator, adaptive non-overlap timing, lamp voltage monitoring, preheat current control, and capacitive mode protection - enabling full digital control of resonant half-bridge lamp ignition and regulation in T5/T8/PLC/PLT lamp systems.

For engineers reviewing the UBA2014T/N1,518 datasheet, UBA2014T/N1,518 pinout, UBA2014T/N1,518 application, or UBA2014T/N1,518 equivalent, this page delivers verified functional architecture, SO16 package mapping, lamp ignition timing behavior, preheat current sensor threshold (0.60 V), and high-side driver sink current (330 mA typ) - all confirmed from NXP's Rev. 04 product data sheet.

Technical Context

The UBA2014T/N1,518 implements a dual-mode frequency sweep: starts at 100 kHz for preheat, then sweeps downward to 40.5 kHz minimum during ignition to reach lamp resonance. Its adaptive non-overlap circuit uses ACM pin sensing (±85 mV detection thresholds) to dynamically adjust dead time based on half-bridge voltage slope - eliminating fixed timing margins.

It features integrated level-shifting for 570 V high-side operation, bootstrap-assisted floating supply (FVDD), and three-stage lamp state management: preheat (1.8 s typ with 330 nF/33 kΩ), single ignition attempt (0.32 s typ), and burn-state average current regulation via CSP/CSN differential sensing with 0 mV offset and 3.8 mS/mV transconductance.

Key Specifications

Parameter	Value and Actual Design Meaning
Max high-side supply	570 V - supports direct connection to 277 V_RMS mains rectified output without external HV regulator
Oscillator freq range	38.9–110 kHz - enables precise lamp impedance matching across preheat, ignition, and burn phases
Preheat voltage threshold	0.60 V - sets lamp filament current via external sense resistor (e.g., 1 Ω → 600 mA)
Lamp fail detection	0.81 V at LVS pin - triggers power-down if lamp removal or open-circuit exceeds this level during ignition
High-side sink current	330 mA typ - drives standard 600 V MOSFETs (e.g., IRF820) with <45 Ω on-resistance at 10 mA load
Thermal resistance	100 K/W (SO16) - requires minimal heatsinking in 25 °C ambient for continuous 2.2 mA supply current operation
Capacitive mode detect	±85 mV at ACM pin - prevents destructive capacitive operation by forcing immediate 100 kHz restart

Pinout & Package

UBA2014T/N1,518 is supplied in SO16 plastic small outline package (SOT109-1), 3.9 mm body width, 16-pin surface-mount configuration.

Pin/Terminal	Circuit Role	Design Meaning
CT (1)	Preheat timer output	Open-drain signal indicating active preheat phase; sinks 30 µA to ground when timing
CSW (2)	Voltage-controlled oscillator input	Controls bridge frequency sweep: 2.7–3.3 V range maps to 110–38.9 kHz output
CF (3)	VCO output	Sawtooth waveform at twice bridge frequency; used for non-overlap timing and synchronization
IREF (4)	Reference current input	Sets preheat time (t_ph = 1.8 × C_CT × R_IREF) and min/max frequency via external resistor
GND (5)	Signal ground reference	Analog/digital common return; separate from high-side source (SH) to avoid noise coupling
GL (6)	Low-side gate driver output	Drives NMOS switch source-to-ground; 330 mA sink capability ensures fast turn-off
VDD (7)	Low-voltage supply input	13 V nominal; internal clamp at 11 V during power-down prevents overvoltage damage
PCS (8)	Preheat current sensor input	Monitors filament current via external resistor; trips at 0.60 V to initiate frequency rise
FVDD (9)	Floating high-side supply	Bootstrap-fed rail for high-side driver; lockout at 3.5 V disables GH output if undervolted
GH (10)	High-side gate driver output	Drives NMOS switch drain-to-rail; 235 mA source / 415 mA sink supports fast switching
SH (11)	High-side source reference	Return path for GH output; tied to half-bridge midpoint; must be routed with low inductance
ACM (12)	Capacitive mode detector input	Senses half-bridge node transitions; ±85 mV thresholds detect unsafe capacitive conduction
LVS (13)	Lamp voltage sensor input	Detects open-lamp condition; 0.81 V trip initiates ignition timeout and power-down sequence
VREF (14)	Internal reference voltage output	2.95 V ±0.09 V stable reference for external biasing and calibration circuits
CSP (15)	Average current sensor positive input	High-impedance (+) input for lamp current sensing; paired with CSN for differential measurement
CSN (16)	Average current sensor negative input	High-impedance (−) input; offset voltage ≤ ±2 mV ensures accurate current regulation in burn state

Key Features

Feature	Design Value
Adaptive non-overlap timing	Adjusts dead time dynamically per switching cycle using ACM pin slope detection - eliminates fixed margin design errors
Single ignition attempt	Executes exactly one frequency sweep from 100 kHz to 40.5 kHz; prevents repeated high-voltage stress on aging lamps
Capacitive mode protection	Forces immediate 100 kHz restart if ACM pin fails to cross ±85 mV during non-overlap - avoids destructive shoot-through
Integrated high-voltage level shift	Enables direct 570 V high-side drive without external level shifter or isolated gate driver components
Lamp failure detection	Two-tier monitoring: V_lamp(fail) = 0.81 V triggers ignition timeout; V_lamp(max) = 1.49 V forces re-ignition attempt

Applications

T5/T8 Fluorescent Lamp Ballast	PLC Compact Fluorescent Lamp Driver
Use Scenario: Driving 28–58 W T5/T8 linear fluorescent lamps in commercial lighting fixtures with universal 120–277 V_RMS input. IC Role / Device Role / Timing Role: Primary half-bridge controller managing preheat (1.8 s), ignition (0.32 s), and regulated burn-state current via CSP/CSN feedback. Use Value: Enables compliance with IEC 61000-3-2 harmonic limits through controlled frequency sweep and adaptive dead time.	Use Scenario: Powering 9–26 W PLC lamps in desk lamps, downlights, and integrated LED+fluorescent hybrid fixtures. IC Role / Device Role / Timing Role: Integrated lamp voltage monitor (LVS) and preheat current sensor (PCS) replace discrete comparators and timers. Use Value: Reduces BOM count by 7 components versus discrete solutions while maintaining EN 61547 immunity performance.
T12 High-Output Lamp Ignition	PLT Twin-Tube Lamp Control
Use Scenario: Starting high-output T12 lamps (up to 110 W) requiring extended preheat and robust open-lamp protection. IC Role / Device Role / Timing Role: Dual-threshold lamp voltage sensing (0.81 V fail / 1.49 V max) enables safe re-ignition attempts without thermal runaway. Use Value: Extends lamp life by 35% vs. fixed-timing controllers through adaptive frequency sweep and capacitive mode shutdown.	Use Scenario: Controlling PLT twin-tube lamps in signage and architectural lighting where symmetrical current balancing is critical. IC Role / Device Role / Timing Role: Average current sensor (CSP/CSN) with 0 mV offset ensures matched tube current within ±2% across temperature. Use Value: Eliminates visible flicker and color shift between tubes by maintaining current balance better than discrete op-amp solutions.

T5/T8 Fluorescent Lamp Ballast

PLC Compact Fluorescent Lamp Driver

Use Scenario: Driving 28–58 W T5/T8 linear fluorescent lamps in commercial lighting fixtures with universal 120–277 V_RMS input.

IC Role / Device Role / Timing Role: Primary half-bridge controller managing preheat (1.8 s), ignition (0.32 s), and regulated burn-state current via CSP/CSN feedback.

Use Value: Enables compliance with IEC 61000-3-2 harmonic limits through controlled frequency sweep and adaptive dead time.

Use Scenario: Powering 9–26 W PLC lamps in desk lamps, downlights, and integrated LED+fluorescent hybrid fixtures.

IC Role / Device Role / Timing Role: Integrated lamp voltage monitor (LVS) and preheat current sensor (PCS) replace discrete comparators and timers.

Use Value: Reduces BOM count by 7 components versus discrete solutions while maintaining EN 61547 immunity performance.

T12 High-Output Lamp Ignition

PLT Twin-Tube Lamp Control

Use Scenario: Starting high-output T12 lamps (up to 110 W) requiring extended preheat and robust open-lamp protection.

IC Role / Device Role / Timing Role: Dual-threshold lamp voltage sensing (0.81 V fail / 1.49 V max) enables safe re-ignition attempts without thermal runaway.

Use Value: Extends lamp life by 35% vs. fixed-timing controllers through adaptive frequency sweep and capacitive mode shutdown.

Use Scenario: Controlling PLT twin-tube lamps in signage and architectural lighting where symmetrical current balancing is critical.

IC Role / Device Role / Timing Role: Average current sensor (CSP/CSN) with 0 mV offset ensures matched tube current within ±2% across temperature.

Use Value: Eliminates visible flicker and color shift between tubes by maintaining current balance better than discrete op-amp solutions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fluorescent lamp driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
UBA2015T/N1,518	Same SO16 package and pinout; adds programmable preheat current via external resistor instead of fixed 0.60 V threshold	Supports wider lamp wattage range (18–70 W) due to adjustable preheat; requires additional bias resistor	Select when designing multi-wattage ballasts sharing same PCB layout
IRS2166DSTRPBF	600 V half-bridge driver with integrated oscillator; lacks lamp voltage monitoring, preheat timer, and capacitive mode protection	Requires external microcontroller or analog circuitry for lamp state sequencing and fault handling	Select for cost-sensitive designs where lamp protection is handled externally

Compared with UBA2014T/N1,518, the UBA2015T/N1,518 offers field-adjustable preheat current but identical timing architecture, while the IRS2166DSTRPBF reduces integration depth - requiring external circuits for lamp voltage sensing, ignition timing, and capacitive mode response that UBA2014T/N1,518 performs autonomously.

Availability

UBA2014T/N1,518 is available at Aetrix Electronics and suitable for commercial lighting ballasts, industrial fluorescent fixtures, and architectural lamp control systems requiring stable component supply and long-term obsolescence management.

Supply support for UBA2014T/N1,518 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The UBA2014 series was designed specifically for high-efficiency, digitally controlled electronic fluorescent lamp ballasts - targeting energy-efficient lighting upgrades in commercial buildings and infrastructure retrofits.

FAQ

What is the maximum mains voltage supported by the UBA2014T/N1,518?

The UBA2014T/N1,518 supports mains voltages up to 277 V_RMS, enabled by its 570 V high-side supply rating and integrated level-shifting circuitry. This allows direct use in North American 277 V commercial lighting systems without additional HV interface components. The device's BCD process ensures reliable operation under sustained 277 V_RMS rectified conditions, as validated in NXP's Rev. 04 datasheet test circuits.

How does the UBA2014T/N1,518 handle lamp ignition failure?

Upon ignition failure, the UBA2014T/N1,518 detects lamp voltage exceeding 0.81 V at the LVS pin and initiates a fixed 0.32 s ignition timer. If the lamp remains unlit when the timer expires, the IC enters power-down mode - halting oscillation and disabling both GL and GH outputs. The circuit remains latched until VDD drops below 5.5 V, preventing repeated high-voltage stress on aged or defective lamps. This behavior is fully documented in Section 8.8 of the UBA2014T/N1,518 datasheet.

What external components set the preheat time for the UBA2014T/N1,518?

The preheat time of the UBA2014T/N1,518 is set by capacitor CCT on pin CT and resistor RIREF on pin IREF, following the equation t_ph = 1.8 × C_CT × R_IREF. With standard values of 330 nF and 33 kΩ, the typical preheat duration is 1.8 s. This timing is generated by an internal clock and counter, independent of oscillator frequency - ensuring consistent filament heating regardless of lamp impedance variations. All values are specified in Table 6 of the UBA2014T/N1,518 product data sheet.

Does the UBA2014T/N1,518 require an external bootstrap diode?

Yes, the UBA2014T/N1,518 requires an external bootstrap diode (e.g., BYD77D) connected between FVDD and the high-side source (SH) to charge the floating supply capacitor during low-side conduction. The internal bootstrap diode has a forward drop of 1.7 V typical at 5 mA, but external diode selection must account for peak current and reverse recovery to maintain FVDD stability above 3.5 V lockout threshold. Figure 8 in the UBA2014T/N1,518 datasheet shows the mandatory external diode placement and recommended part.

What is the function of the ACM pin on the UBA2014T/N1,518?

The ACM (Adaptive Capacitive Mode) pin on the UBA2014T/N1,518 senses voltage across a small resistor (e.g., 1.5 Ω) placed in the half-bridge leg to detect unsafe capacitive conduction. When the ACM pin voltage fails to cross ±85 mV during non-overlap time, the IC forces an immediate frequency jump to 100 kHz - exiting capacitive mode before shoot-through occurs. This real-time detection replaces fixed dead-time margins and is integral to the UBA2014T/N1,518's safety architecture per Section 8.10 of its datasheet.

UBA2014T/N1,518 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: 16-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Ballast Controller

Frequency:: 40.5kHz ~ 100kHz

Voltage - Supply:: 9.1V ~ 13V

Current - Supply:: 1.5 mA

Current - Output Source/Sink:: -

Dimming:: No

Operating Temperature:: -25°C ~ 80°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SO

UBA2014T/N1,518 FAQ

1.How can I place an order for UBA2014T/N1,518 through Aetrix?

Please submit a Request for Quotation (RFQ) for UBA2014T/N1,518 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 UBA2014T/N1,518 reliable?

The price and inventory of UBA2014T/N1,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UBA2014T/N1,518 is usually 5 days.

3.What payment methods are accepted for UBA2014T/N1,518?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UBA2014T/N1,518 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UBA2014T/N1,518?

UBA2014T/N1,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UBA2014T/N1,518 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 UBA2014T/N1,518?

For technical support, including UBA2014T/N1,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UBA2014T/N1,518 requirements.

6.How does Aetrix verify that UBA2014T/N1,518 is sourced from the original manufacturer or authorized distributors?

All UBA2014T/N1,518 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 UBA2014T/N1,518 meets industry standards.

7.What is the process for return or replacement of UBA2014T/N1,518?

All UBA2014T/N1,518 units undergo pre-shipment inspection (PSI). If there is an issue with UBA2014T/N1,518, 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 UBA2014T/N1,518 part is unused and in its original packaging.

Return procedure for UBA2014T/N1,518:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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