|
中文版 | English |
|
NXP series
SSL21081/SSL21083 simple - the external efficiency up to 95% of the non-isolated LED solutions.
分类：NXP series 来源：网络 发布：2013-03-27 22:17:10
Download SSL21081-SSL2183 PDF document
General description nThe SSL21081/SSL21083 are a range of high-vol tage Integrated Circu its (ICs) for driving LED lamps in general mains non-dimmable lighting applications. The main benefits of these products are: ● Small Printed-Circuit Board (PCB) footprint, and compact solution ●High efficiency (up to 95 %) ● Ease of integration ● Low electronic Bill Of Material (BOM) These ICs incorporate a 300 V or 600 V MOSFET. The ICs work as boundary conduction mode converters, typically in buck configuration. The IC range has been designed to start up directly from the HV supply by an internal high-voltage current source. Thereafter, the dV/dt supply is used with capacitive coupling from the drain, or any other auxiliary supply. This function provides full flexibility in the application design. The IC consumes 1.3 mA of supply current with an internal clamp limiting the supply voltage. The ICs provide accurate output current contro l with LED current accuracy within 5 %. The ICs can be operated using Pulse-Width Mo dulation (PWM) current regulation and has many protection features including easy LED temperature feedback. Features and benefits ● LED driver ICs for driving LED strings from a rectified mains supply ●High-efficiency switch mode buck driver product family: ● SSL21081AT/SSL21081T: drivers with integrated 300 V (DC) power switches ● SSL21083AT/SSL21083T: drivers with integrated 600 V (DC) power switches ● Con troller with power-efficient boundary conduction mode of operation with: ● No reverse recovery loss es in fre ewheel diode ● Zero Current Switching (ZCS) for turn-on of switch ● Zero volt age or valley swit ching for turn-on of switch ● Minimal required inductance value and size ● Dire ct PWM current regulation possible ● Fast transient response through cycle-by-cycle current control: ● Negligible AC mains ripple at LED current and minimal total capacitor value ● No over or undershoots in the LED current ● No bin ning on LED forward voltage required ● Internal Protections: ● Und erVoltage LockOut (UVLO) ● Leading-Edge Blanking (LEB) ● Ove rCurrent Protection (OCP) ● Short-Winding Protection (SWP) SSL21081T/SSL21083T only ● In ternal OverTemperature Protection (OTP) ● Brownout protection ● Output Short Protection (OSP) ● Low component count (see Figu re 3 ) LED driver solution: ● No Schottky diode r equired due to ZCS ● No dim switch and high-side driver required for PWM current regulation ● Easy external temperature protection with a single NTC resistor ● Option for soft-start function ● Compatible with wall switches with built-in indication light during standby1 ● IC lifetime easily matches or surpasses LED lamp lifetime
|