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Overview
| Topology | Buck Converter |
| Input voltage | 230 V |
| Output 1 | 125 V / 0.3 A |
| IC revision | 1 |
Description
The SSL5261AT is a highly integrated, high-precision dimmable controller with anexternal MOSFET. It is intended to drive LED lamps in dimmable lighting applications upto 25 W.The SSL5261AT is designed for high power factor, phase-dimmable applications.The SSL5261AT operates in Boundary Conduction Mode (BCM) with on-time control. It provides a constant output current control with good LED output current accuracy.Adaptive switching frequency gives freedom to choose the inductor, which enables theoptimization of inductor size, efficiency and EMI.The SSL5261AT can start up and operate in switching mode directly from an externalresistor without capacitor charge pump supply or auxiliary supply. This feature simplifiesthe VCC supply. So, a low-cost off-the-shelf inductor can be used, which provides flexibilityin application design.The SSL5261AT has a separate feedback and current sense input. This input makes theSSL5261AT suitable to be used in buck and buck-boost topologies.The input voltage on DIM pin regulates the output current by controlling the averagevoltage on the FB input.
Features
- Supports most available dimming solutions-Deep dimming level-Flicker-free dimming-Average dimming control-Low component count ensuring a compact solution and small, single layer
- Printed-Circuit Board (PCB) footprint-Excellent line regulation and load regulation and good LED output current accuracy-Flexible buck or buck-boost applications-Efficient BCM operation with:-Minimal reverse 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 91 %)-Ultra low IC current during operation (< 200 A)
- Auto-recovery protections:-UnderVoltage LockOut (UVLO)-Cycle-by-cycle OverCurrent Protection (OCP)-nternal OverTemperature Protection (OTP)-Output OverVoltage Protection (OVP)-Output Short Protection (OSP)-Extended IC lifetime
Typical applications
- The SSL5261AT is intended for low-cost, non-isolated dimmable lighting applications
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | ISAT (A) | fres (MHz) | IR (A) | L (µH) | RDC max. (mΩ) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 7447471221 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-TIS Radial Leaded Wire Wound Inductor | 1.4 | 2.6 | 1 | 220 | 510 | – | – | – | 11 | 11 | 11.5 | THT | ||
 | 744821110 | SPEC | 10 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CMB Common Mode Power Line Choke | – | – | 0.7 | 10000 | 350 | 250 | 1500 | MnZn | 15 | 7.5 | 18 | THT |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 7447471221 | SPEC | |
| 744821110 | SPEC |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | ISAT (A) | fres (MHz) | IR (A) | L (µH) | RDC max. (mΩ) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Mount | Samples |
|---|