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Overview
| Topology | Flyback Converter |
| Output 1 | 50 V / 1 A |
| IC revision | 1.02 |
Description
The SSL5257TE is a highly integrated, high-precision buck-boost controller with aninternal MOSFET. It is intended to drive low-cost compact dimmable LED lamps up to10 W. The SSL5257TE is designed to achieve high power factor, phase-dimmableapplications.The SSL5257TE operates in Boundary Conduction Mode (BCM) with on-time control. Itregulates a constant output current over line and load variations. The wide switchingfrequency range makes it possible to choose an inductor, which enables the optimizationof inductor size, efficiency and EMI.The SSL5257TE can start up and operate in switching mode directly from the rectifiedmains. To provide a low-cost driver design, an off-the-shelf inductor can be used, whichprovides flexibility in application design.
Features
Integrated MOSFET (10 /700 V) Supports most available dimming solutions Deep dimming level Flicker-free dimming Low component count ensuring a compact solution and small, single layerPrinted-Circuit Board (PCB) footprint Excellent line regulation and load regulation and good LED output current accuracy Hotaru current control Internal thermal foldback Efficient BCM operation with: Minimal recovery losses in freewheel diode Zero Current Switching (ZCS) and Valley switching for turn-on of switch Minimal inductance value and size required High efficiency (up to 90 %) Ultra low IC current during operation (< 200 A) Auto-recovery protections: UnderVoltage LockOut (UVLO) Cycle-by-cycle OverCurrent Protection (OCP) Internal OverTemperature Protection (OTP) Output OverVoltage Protection (OVP) Output Short Protection (OSP) Extended IC lifetime
Typical applications
- The SSL5257TE is intended for low-cost, non-isolated dimmable lighting applications
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | IR (A) | L (mH) | RDC max. (mΩ) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 744824220 | SPEC | 10 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CMB Common Mode Power Line Choke | 2 | 20 | 220 | 250 | 1500 | MnZn | 27.5 | 18.5 | 33 | THT | ||
 | 744841247 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CMB NiZn Common Mode Power Line Choke | 2 | 0.047 | 40 | 250 | 1500 | NiZn | 16 | 7.5 | 17.5 | THT | ||
 | 750312186 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Inductor | – | 0.696 | – | – | – | – | 20.83 | 24.64 | 11.43 | THT | |
| 750314464 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Flyback Transformer - WE-FB | – | – | – | – | – | – | – | – | – | – | ||
| 750311081 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Gate Drive Übertrager | – | – | – | – | – | – | – | – | – | – |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 744824220 | SPEC | |
| 744841247 | SPEC | |
| 750312186 | SPEC | – |
| 750314464 | SPEC | – | |
| 750311081 | SPEC | – |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | IR (A) | L (mH) | RDC max. (mΩ) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | Samples |
|---|