Product overview
Description
The L6462A is a control IC for Transition Mode (TM) Boost PFC converters, suitable for building cost-sensitive, energy-efficient solutions.
It embeds a special implementation of current-mode control that enables wide-range mains operation with low THD over a broad load range with no need for input voltage sensing and without a classical analog multiplier.
A pair of special circuits (Current Reference Generator, RCG, and Current Reference Shaper, CRS) shape the reference for the peak current of the inductor to maintain a sinusoidal input current regardless of the converter’s operation, whether TM or DCM. This way, it is possible to improve efficiency at intermediate and light loads with minimum impact on input current distortion.
At full load and low AC line, the device synchronizes the turn-on of the power switch to the valley of the ringing following demagnetization of the boost inductor (valley switching – quasi-resonant operation). At high AC line, and as the load is reduced, the IC skips ringing valleys to reduce the operating frequency progressively, so that the converter operates in Discontinuous Conduction Mode (DCM) to optimize efficiency, while maintaining valley switching.
Boost inductor demagnetization sensing is done via the gate driver output. No auxiliary winding or other interface components are needed.
The output voltage is controlled by means of a transconductance type error amplifier and an accurate (2% overall) internal voltage reference. The dynamic response to large-load transients is improved by an enhanced error amplifier that prevents excessive overshoots or undershoots in the output.
The device features low consumption (<60 µA before start-up and 2.3 mA while driving a 1nF capacitive load at 70 kHz) and includes a disable function suitable as a protection or for IC remote ON/OFF from a cascaded conversion stage.
The device offers protection functions against overcurrent, output overvoltage, feedback failure and inductor saturation/shorts in the by-pass diode.
The totem pole output stage, capable of at least 300 mA source and 600 mA sink current, is suitable for MOSFET driving. All these features make the device an excellent low-cost solution for EN 61000-3-2 compliant SMPS.
L6462A is optimized to address 90 VAC - 264 VAC / 400 VOUT applications.
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All features
- PFC Transition-Mode current control without input voltagesensing
- Valley skipping with valley lock
- Very low THD in all operating conditions
- Demagnetization sensing via gate driver
- Overvoltage and feedback failure protections
- Inductor saturation detection
- Automatic burst-mode at light load
- Low (<60 µA) start-up current
- Low (<1.1 mA) quiescent current
- 2%overallinternal reference voltageaccuracy
- -300/+600 mA totem pole gate driver with active pull-down during UVLO and voltage clamp
- 6-pin package
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STMicroelectronics - L6462A
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All resources
| Resource title | Version | Latest update |
|---|
SIMPLIS models (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| ZIP | 2025.07 | 07 Nov 2025 | 07 Nov 2025 |
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|
| L6462A | Proposal | - | Industrial | - | - | - | |
| L6462ATR | Active | SOT23-6L | Industrial | Ecopack2 | - | - | |
L6462A
Package:
-Material Declaration**:
L6462ATR
Package:
SOT23-6LMaterial Declaration**:
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating Temperature (°C) (min) | Operating Temperature (°C) (max) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L6462ATR | | | distributors No availability of distributors reported, please contact our sales office | ||||||||||
| L6462A | | | distributors No availability of distributors reported, please contact our sales office |
L6462ATR Active
L6462A Proposal
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors