STMicroelectronics ALTAIR04-900
The ALTAIR04-900 is a high voltage all-primarysensing switcher, operating directly from the rectified mains with minimum external parts. It combines a high-performance low voltage PWM controller chip and a 900 V avalanche-rugged power section in the same package.| Part No. | ALTAIR04-900 |
|---|---|
| Datasheet | ALTAIR04-900 Download |
| Manufacturer |  STMicroelectronics |
| Description | Off-line all-primary-sensing switching regulator |
| Buy | Stock & Price |
FEATURES
● Optoless primary side constant voltage operations● Adjustable and mains-independent maximum output current for safe operations during overload/short-circuit conditions
● 900 V avalanche-rugged internal power section
● Quasi-resonant valley switching operation
APPLICATIONS
● SMPS for energy metering● Auxiliary power supplies for 3-phase input industrial systems
● AC-DC adapters
DESCRIPTION
Figure 1. Block diagram +Vi n +V out Vc c Rz cd ZCD/F B Rfb Is tart-up P ROT ECTION & FE EDFORWARD LOGI C Prot DE MAG LOGIC S /H - + 2.5 V IFF 3.3 V R S Q R Int ernal s upply bus V ref SUPP LY & UV LO B LA NK ING TIME Vc + Iref + - UV LO STA RT ER TURN -ON LOGI C LEB S Q R 1V - I FF + R FF Intern. s upply bus S Q R UV LO Prot DRA IN C OMP R comp IR EF Cref Cc om p GN D S OURCE Rsens e October 2014 This is information on a product in full production. DocID18211 Rev 3 1/29 Contents Contents ALTAIR04-900 1DESCRIPTION
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