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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Gate Drivers

STMicroelectronics L6569D

Name: L6569D
Brand: STMicroelectronics
SKU: L6569D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6569D

Manufacturer:: STMicroelectronics

Category:: Gate Drivers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: L6569D.pdf

Description:: IC GATE DRVR HALF-BRIDGE 8SO

Quantity:: RFQ Add To RFQ list

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Inventory:1,434

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Product details

Overview

L6569D from STMicroelectronics is a high-voltage half-bridge gate driver IC with integrated oscillator, designed for driving external N-channel MOSFETs and IGBTs in resonant lamp ballast and SMPS applications. It features 600V high-side rail capability, 1.25µs typ. dead time, ±50V/ns dV/dt immunity, internal bootstrap diode structure, and 15.6V zener clamp on VS pin.

For engineers reviewing the L6569D datasheet, L6569D pinout, L6569D application, or L6569D equivalent, key selection criteria include bootstrap LDMOS R_ON (120Ω), programmable oscillator frequency (up to 200kHz), sink/source drive strength (270mA/170mA), UVLO hysteresis (1V typ.), and SOA-limited V_BOOT slew rate compliance.

Technical Context

The L6569D integrates a charge-pump-synchronized bootstrap driver that replaces external diodes, using a patented bidirectional HV LDMOS (R_ON = 120Ω typ.) gated by LVG output with 50ns delay. Its oscillator uses external R_F/C_F network (f_OSC = 1.3863/(R_FC_F)) and supports external logic override via CF pin.

Internal level-shifting ensures robust high-side operation up to 618V V_BOOT, while under-voltage lockout (VS turn-on threshold 9V, hysteresis 1V) and dV/dt immunity (±50V/ns on BOOT/OUT) enable reliable operation in noisy AC-line environments.

Key Specifications

Parameter	Value and Actual Design Meaning
High-Voltage Rail	600V max VS supply; enables direct connection to rectified mains in offline converters
Oscillator Frequency	Programmable 20–200kHz via external R_F/C_F; supports CFL ballast timing control
Driver Output Current	270mA sink / 170mA source per channel; sufficient to drive 10nF gate capacitance at 60kHz
Dead Time	1.25µs typ.; prevents shoot-through in half-bridge power stage during switching transitions
dV/dt Immunity	±50V/ns on BOOT and OUT pins; ensures stable level shifting under fast high-side commutation
Bootstrap Structure	Integrated LDMOS (R_ON = 120Ω) replaces external bootstrap diode; reduces BOM count and layout area
UVLO Hysteresis	1V typ. (VSUVH); prevents oscillation near turn-on threshold during brownout conditions

Pinout & Package

Package: SO8 (Small Outline, 8-pin, 1.27mm pitch), compliant with JEDEC MS-012, maximum thermal resistance 150°C/W (junction-to-ambient).

Pin/Terminal	Circuit Role	Design Meaning
1 (VS)	Low-side supply input with internal 15.6V zener clamp	Provides bias for low-side driver and oscillator; clamps transients to protect internal circuitry
2 (RF)	Oscillator timing resistor connection	Sinks current to set oscillator frequency; can also drive secondary L6569 in full-bridge configuration
3 (CF)	Oscillator timing capacitor / external logic input	Defines frequency with RF; accepts TTL/CMOS logic signal for synchronous shutdown or external clocking
4 (GND)	Power and signal reference ground	Common return for low-side driver, oscillator, and logic; must be low-inductance for noise immunity
5 (LVG)	Low-side gate driver output	Drives N-MOSFET gate directly; 170mA source/270mA sink capability enables fast turn-on/turn-off
6 (OUT)	High-side floating reference node	Connects to source of high-side MOSFET; serves as return path for high-side driver current
7 (HVG)	High-side gate driver output	Drives high-side N-MOSFET gate referenced to OUT; synchronized with LVG to enforce dead time
8 (BOOT)	Floating bootstrap supply input	Receives charge from internal LDMOS during LVG high phase; powers high-side driver stage

Key Features

Feature	Design Value
Integrated Bootstrap Driver	Patented HV LDMOS (120Ω R_ON) eliminates external diode and reduces PCB footprint by ~30%
Programmable Oscillator	Frequency set via single R_F/C_F pair; supports 20–200kHz range without trimming
Robust Level Shifting	Withstands ±50V/ns dV/dt on BOOT/OUT; maintains gate drive integrity during fast high-side switching
UVLO with Hysteresis	9V turn-on / 8V turn-off thresholds ensure clean startup and prevent erratic behavior during line dips
Dual Startup Modes	L6569D implements L6569-style startup (LVG active during VS ramp-up), distinct from L6569A's delayed activation

Applications

Compact Fluorescent Lamp (CFL) Ballast

Resonant LLC Half-Bridge Converter

Use Scenario: Driving 18W Sylvania De-luxe T/E lamp with 110/220V universal input and PTC preheat.

IC Role / Device Role / Timing Role: Half-bridge gate driver with built-in oscillator sets lamp ignition frequency (~60kHz) and controls resonant tank timing.

Use Value: Internal bootstrap driver eliminates discrete diode; UVLO and dV/dt immunity ensure reliable cold-start and EMI resilience.

Use Scenario: Controlling high-efficiency 100–300W DC-DC converter with ZVS operation and variable load.

IC Role / Device Role / Timing Role: High-side/low-side gate driver enforcing 1.25µs dead time to prevent cross-conduction during zero-voltage switching transitions.

Use Value: 600V VS rating and ±50V/ns dV/dt tolerance maintain timing accuracy across wide input voltage and temperature ranges.

Induction Heating Half-Bridge

AC-DC Adapter with PFC + Half-Bridge Stage

Use Scenario: Driving parallel N-channel MOSFETs in 20–50kHz induction heating inverter for cooktop applications.

IC Role / Device Role / Timing Role: Gate driver delivering 270mA sink current to rapidly discharge gate capacitance and minimize conduction losses.

Use Value: 15.6V VS clamp protects internal bias regulator during high dv/dt events common in inductive loads.

Use Scenario: Secondary-side half-bridge in 65W laptop adapter with universal input and synchronous rectification.

IC Role / Device Role / Timing Role: Isolated gate driver providing precise dead-time control and bootstrap charging for high-side FET in compact layout.

Use Value: SO8 package and integrated bootstrap reduce component count vs. discrete driver + diode solutions.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage half-bridge driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IR2153(D)	No integrated oscillator; requires external RC or crystal timing; no internal bootstrap diode; lower dV/dt immunity (±25V/ns)	Better suited for fixed-frequency SMPS where external timing precision is required	Select IR2153D when oscillator flexibility is less critical than timing accuracy or cost sensitivity
IRS21844	Higher drive current (600mA sink/290mA source); no internal oscillator; includes bootstrap diode but not LDMOS-based	Preferred for high-power motor drives requiring faster gate charging and higher peak current	Choose IRS21844 for >200W applications needing stronger drive and external frequency control

Compared with IR2153D and IRS21844, the L6569D uniquely combines oscillator integration, patented bootstrap LDMOS, and ±50V/ns dV/dt immunity - making it optimal for cost-sensitive, space-constrained CFL and resonant converter designs where self-contained timing and reduced BOM are prioritized.

Availability

L6569D is available at Aetrix Electronics and suitable for compact fluorescent lamp ballasts, resonant LLC converters, induction heating inverters, and AC-DC adapters requiring stable component supply and long-term industrial availability.

Supply support for L6569D 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 ICs with over 45 years of industrial reliability.

The L6569D belongs to ST's high-voltage AC-DC driver product line, engineered specifically for energy-efficient lighting and offline power conversion systems operating directly from rectified mains.

FAQ

What is the purpose of the internal 15.6V zener clamp on the VS pin?

The 15.6V zener clamp on VS protects the internal bias regulator and oscillator circuitry from overvoltage transients during startup or line surges. It limits the VS rail to safe levels without requiring external clamping components, simplifying design for universal-input offline applications.

Can the L6569D drive both MOSFETs and IGBTs reliably?

Yes - the L6569D delivers 270mA sink and 170mA source current per output, sufficient to drive standard 10–20nF gate capacitances of N-channel MOSFETs (e.g., STD2NB50) and low-Q_g IGBTs used in CFL and SMPS half-bridges. Its 1.25µs dead time prevents shoot-through in both device types.

How does the internal bootstrap driver differ from a standard external diode solution?

The L6569D uses a patented high-voltage LDMOS switch (R_ON = 120Ω) synchronized with LVG to charge the bootstrap capacitor - eliminating reverse recovery loss, forward voltage drop, and PCB layout parasitics associated with discrete diodes. This improves efficiency and thermal performance in high-frequency operation.

Is the L6569D pin-compatible with the L6569A?

No - while both share identical pinout and package, L6569D and L6569A differ in startup sequence: L6569D activates LVG immediately upon VS reaching 9V, whereas L6569A holds LVG low until VS stabilizes. This affects preheat timing in lamp ballasts and requires firmware or circuit-level validation before substitution.

L6569D Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Driven Configuration:: Half-Bridge

Channel Type:: Synchronous

Number of Drivers:: 2

Gate Type:: IGBT, N-Channel MOSFET

Voltage - Supply:: 10V ~ 16.6V

Logic Voltage - VIL, VIH:: -

Current - Peak Output (Source, Sink):: 170mA, 270mA

Input Type:: RC Input Circuit

High Side Voltage - Max (Bootstrap):: 600 V

Rise / Fall Time (Typ):: -

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

L6569D FAQ

1.How can I place an order for L6569D through Aetrix?

Please submit a Request for Quotation (RFQ) for L6569D 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 L6569D reliable?

The price and inventory of L6569D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6569D is usually 5 days.

3.What payment methods are accepted for L6569D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6569D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6569D?

L6569D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6569D 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 L6569D?

For technical support, including L6569D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6569D requirements.

6.How does Aetrix verify that L6569D is sourced from the original manufacturer or authorized distributors?

All L6569D 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 L6569D meets industry standards.

7.What is the process for return or replacement of L6569D?

All L6569D units undergo pre-shipment inspection (PSI). If there is an issue with L6569D, 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 L6569D part is unused and in its original packaging.

Return procedure for L6569D:

1.Submit a request within 90 days.

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

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