文档介绍：IntroduceIntroduce iWattiWatt DigitalDigital PowerPower
ControlControl TechnologyTechnology ForFor HBHB LEDLED
iWatt Confidential Documents
General requirement for LED__performance
• Tight CC Regulation – Accuracy between +/- 5%
• High Efficiency
• Protections – Line UV, OV, Output Short / Open, OTP
• Hi power density
iWatt Confidential 2
General requirement for LED__Regulation and Reliability
• Line isolation & Hi-pot test – Meet IEC60968&IEC61347
• EMC requirement – Meet EN55015B (QP & AV scan)
• PF and Harmonic current
• Reliability & High MTBF
iWatt Confidential 3
iWatt Digital Power Solutions for PSU with CC CV Mode
The first company to release Digital Power Control IC for ac/dc offline
- iW1689, iW1692, iW1690, iW1696, iW1691 iW1710, iW3620 , 3610
Provide Total-System-Solution for low-power adapter charger at low-cost high-
performance
- Patented digitally primary-feedback control technology with Tight CV regulation
- Patented CC regulation with primary-feedback
- No Opto, No TL431, No current sensor, No secondary control circuits
Multi-layer advanced protection features
- Isense short protection and other single-point fault protections
- Brown-out / recovery
- OVP, UVP, short circuit
iWatt Confidential 4
Intelligent Multi-Mode Operation
5V/ 5V/
5V/0A 5V/ 5V/
PFM PWM VMS 4V/1A
iW3620
VMS
Multi Mode Operation
- PFM at light Load PWM
- PWM 2V/1A
- CC
- Fast Dynamic response PFM
Advanced internal loop