Optoelectronics
NXP Announces GreenChip for Low-Cost LED Lamps up to 10W
NXP today announced the SSL2115x series of high-efficiency GreenChip driver ICs for low-cost LED retrofit lamps. The new SSL21151 and SSL21153 are designed for non-dimmable 5W and 10W LED lamps respectively, providing good current control in flyback and buck-boost configurations. The SSL2115x enables small form-factor LED drivers, using primary-side sensing to regulate current, and offering integrated LED open/short protections, an internal 700V MOSFET, and a circuit enabling start-up directly from the rectified mains voltage. With the use of an additional valley fill circuit, the SSL2115x series can offer a power factor of approximately 0.9. NXP is showing the SSL21151/53 at Guangzhou International Lighting Exhibition (Hall 13.2, Booth B43).
Features
The new SSL2115x series driver ICs are designed for ultra-low-cost, non-dimmable LEDs using isolated flyback and non-isolated buck-boost topologies, powering up to 5W (SSL21151) and 10W (SSL21153), with a small PCB footprint. Key features include:
Low output ripple ˂1%
Power factor (PF): 0.6 or ~0.9 using valley fill
Internal protections, including over-temperature protection (OTP), LED short protection, LED open protection, and undervoltage lockout protection (UVLO)
Integrated 700V MOSFET
Primary-side sensing without an optocoupler
Low component count, with a complete application requiring only 25 components and fitting in GU10 casing
Compatibility with IEC 61000-3-2 Harmonics Standards
EMC compliance: Class B CISPR22 and FCC Part 15
Compact SO7 package
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Qualification samples of the GreenChip SSL21151 and SSL21153 driver ICs for high-performance non-dimmable LED applications are now available for ordering, with volume production scheduled to begin in July 2012.