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Overview
| Topology | Buck-Boost Converter |
| Input voltage | 180-280 V |
| Switching frequency | 25 kHz |
| Output 1 | 135 V / 0.26 A |
| IC revision | 2 |
Description
The SSL5251T is a highly integrated, high-precision dimmable controller with an externalMOSFET. It is intended to drive LED lamps in dimmable lighting applications up to 25 W.The SSL5251T is designed for high power factor, phase-dimmable applications.The SSL5251T operates in Boundary Conduction Mode (BCM) with on-time control. Itprovides 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 SSL5251T 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.
Features
- Supports most available dimming solutions
- Deep dimming level
- Flicker-free dimming
- 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
- 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 88 %)
- 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
- low-cost, non-isolated dimmable lighting applications
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | Pins (Value) (pcs) | Application | PCB/Cable/Panel | Modularity | Type | L (µH) | IR (A) | ISAT (A) | RDC max. (Ω) | fres (MHz) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 691312710002 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WR-TBL Series 3127 - 5.00 mm Open Horizontal PCB Header | 2 | Pluggable | PCB | No | Horizontal | – | 20 | – | – | – | THT | |
 | 768772102 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-TI HV Radial Leaded Wire Wound Inductor (High Voltage) | – | – | – | – | – | 1000 | 0.5 | 0.55 | 2.08 | 1.8 | THT | ||
| 750311081 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Gate Drive Übertrager | – | – | – | – | – | – | – | – | – | – | – | ||
| 750315481 | SPEC | – | – | Active i| Production is active. Expected lifetime: >10 years. | Power Inductor | – | – | – | – | – | – | – | – | – | – | – |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | Pins (Value) (pcs) | Application | PCB/Cable/Panel | Modularity | Type | L (µH) | IR (A) | ISAT (A) | RDC max. (Ω) | fres (MHz) | Mount | Samples |
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