Simplify e-bike charger design with precise, cost-effective PFC control
L4983 delivers higher efficiency, low THD, and robust transient protection for e-bike chargers
Designing a power factor correction (PFC) stage for an e-bike charging station means balancing demanding power electronics requirements with real-world environmental constraints. While the fundamentals of PFC topology are well understood, deploying a robust solution in public or private charging infrastructure requires careful trade-offs in efficiency, load behavior, thermal performance, and grid compliance.
Built to address these design challenges in 300 W to 3 kW AC-DC converters, ST’s L4983 control IC integrates a proprietary multiplier emulator, dedicated THD optimization, and advanced protection features. This high level of integration helps simplify e-bike charger design while enhancing system reliability.
L4983 Peak current CCM boost PFC controller
L4983 Peak current CCM boost PFC controller
Control IC for continuous conduction mode (CCM) Boost PFC converters, available in two variants at 65 kHz and 130 kHz operation.
Designed for applications from 300 W to 3 kW
Key features
- Peak current mode CCM-operated
- Low BOM and simplified design
- Very low THD in CCM and DCM operation
- Protections: feedback loop failure, OVP, OCP, inductor saturation
- Inductor current sense
- Disable and low consumption function
- In-rush current monitoring
- Soft-start for smooth startup
- 65kHz (A) & 130kHz (B) switching frequency
- Compact SO8 package
Find the right Power Factor Corrector to meet your needs
| L4981 | L4984D | L4983 | L4985 | L4986 |
|---|---|---|---|---|---|
| Control mode | Average current mode | Line-modulated fixed-off-time | Peak current mode | Peak current mode | Peak current mode |
| Line feedforward | Yes (linear) | Yes (linear) | Yes (2 level) | Yes (2 level) | Yes (2 level) |
| Load feedforward | Yes | No | No | No | No |
| Frequency behavior | Fixed frequency (adjustable) | Nearly fixed frequency in CCM | Quasi-fixed frequency (65 or 130 kHz) | Quasi-fixed frequency (65 or 130 kHz) | Quasi-fixed frequency (65 or 130 kHz) |
| Soft-start | Yes (adjustable) | Yes | Yes | Yes | Yes |
| OVP, OCP, feedback failure, inductor saturation protection | Yes | Yes | Yes | Yes | Yes |
| Brownout/brown-in | Yes | Yes | No | Yes (according to IEC 60601-1-2 for medical equipment) | Yes (according to IEC 60601-1-2 for medical equipment) |
| X-cap discharge | No | No | No | Yes | Yes |
| High voltage startup | No | No | No | Yes | Yes |
| Package | SO20 | SSOP10 | SO-8 | SO-8 | SSOP10 |
| Typical applications | Universal-input PFC, low-noise PFC, telecom | High-efficiency, low-cost CCM PFC preregulators | High-power PFC, low THD, compact designs | High-power PFC, low THD, with HV sensing | High-power PFC, Low THD with HV sensing and status output |
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EVL4983-350W evaluation board
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350 W wide-range input PFC pre-regulator. Suitable for high-power LED luminaries, desktop PC, server, web server, game console, industrial and medical SMPS compliant with IEC 60601-1-2.
eDesignSuite: the smart design tool
eDesignSuite: the smart design tool
Our online Power Management Design Center enables engineers to rapidly design and optimize switch-mode power converters across multiple topologies and configurations. It supports applications including power supplies, LED lighting, and battery chargers, accelerating the engineering workflow with advanced simulation, calculation, and configuration tools.