EVLALTAIR900-M1 Double output SMPS for power line applications using the ALTAIR04-900 primary controller Data brief Features ■ Universal input mains range: 90 - 264 Vac, frequency 45 - 65 Hz ■ Double output voltage: 13 V @ 0.55 A and 3.3 V @ 100 mA peak power ■ Optoless constant voltage - constant current output regulation ■ Meets power line communication system specifications based on the ST7580 ■ Average efficiency: > 70% ■ EMI: According to EN55022-Class-B Description This board implements a 7.5 W double output wide range mains adapter with constant voltage constant current, developed to build an innovative AC-DC adapter to supply a complete power line communication based on the ST7580. The power supply provides a 13 V output voltage to supply the power line modem (PLM) and the analog circuitry, and a post-regulated 3.3 V to supply digital circuitry and an optional external microcontroller. In addition, by using the primary constant current loop (CC loop), it is possible to set the maximum deliverable output current without any secondary components or current sensor. The board implements several protections that considerably increase end-product safety and reliability: auxiliary winding disconnection (or brownout) detection, shorted secondary rectifier detection, and transformer saturation protection: all of which are in auto-restart mode. The board uses the new ALTAIR04-900, a quasiresonant (QR) current-mode controller IC specifically designed for QR ZVS (zero voltage switching at switch turn-on) flyback converters, which combines a high-performance low-voltage PWM controller chip and a typical 16 RDS(on), 900 V, avalanche-rugged Power MOSFET in the same package. The device is capable of providing constant output voltage regulation using primary-sensing constant voltage loop (CV loop). This eliminates the need for the optocoupler and the secondary voltage reference while still maintaining quite accurate regulation. December 2011 Doc ID 022633 Rev 1 For further information contact your local STMicroelectronics sales office. 1/5 www.st.com 5 EVLALTAIR900-M1 Figure 1. Output voltage characteristic with 3V3 @ 40 mA 9DF 9DF 9DF 9DF 2XWSXWYROWDJH>9@ 2XWSXWFXUUHQW>P$@ Figure 2. Output voltage characteristic with 3V3 @ 80 mA 9DF 9DF 9DF 9DF 2XWSXWYROWDJH>9@ 2XWSXWFXUUHQW>P$@ 2/5 Doc ID 022633 Rev 1 !#). ! & .4# Doc ID 022633 Rev 1 2 + 2 + + 2 M( , 6 26 OHM7 &":#$ # N& K 2 $2!). 344(,! $ 0+%! $ 2 2 .# 3/52#% 2 6 U& # '.$ # N& )2%& #/.42/, #522%.4 !,4! )2 5 N& #/-0 6$$ "!4 $ # U& N& 6 # N&8 # # #- $&3 0$ N& # 3403,! $ 3403 $ , 9#!0 # U& /54 N& # U& '.$ # U& # ). ,&!" 1 U& # U( 6 6 '.$ .# 2 K 2 ! ! Figure 3. !#). 42 EVLALTAIR900-M1 EVLALTAIR900-M1 electrical diagram 3/5 Revision history 1 EVLALTAIR900-M1 Revision history Table 1. 4/5 Document revision history Date Revision 23-Dec-2011 1 Changes Initial release. Doc ID 022633 Rev 1 EVLALTAIR900-M1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. 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