august 2009 doc id 16146 rev 1 1/4 4 STEVAL-ISA058V1 5 w single output smps demonstration board based on the viper17 off-li ne high voltage converter features input voltage range: 90 v ac to 265 v ac_rms output voltage: 5 v maximum output current: 1 a rohs compliant description the STEVAL-ISA058V1 demonstration board is a 5 w off-line power supply designed as an evaluation platform for the viper17 offline high voltage converter. the viper17 features an 800 v rugged power section, pwm control, two levels of overcurrent protection, overvoltage and overload protection, hysteretic thermal protection, soft-start and safe auto-restart after fault condition removal. burst mode operation and the very low consumption of the device help to meet standby energy saving regulations. advance frequency jittering reduces emi filter cost. a brown-out function protects the switch mode power supply when the rectified input voltage level is below the normal minimum level specified for the system. a high voltage startup circuit is embedded in the device. STEVAL-ISA058V1 www.st.com
circuit schematic STEVAL-ISA058V1 2/4 doc id 16146 rev 1 1 circuit schematic figure 1. schematic diagram ! - v 6 ! # u & 6 # u & 6 2 2 # n & # n & $ " ! 4 $ " ! 4 2 k 2 k # u & 6 # u & 6 2 k 2 k . 4 # / h m . 4 # . 4 # / h m . 4 # 2 k 2 k # - # : u & 6 # - # : u & 6 , u ( , u ( & ! & 5 3 % & ! & 5 3 % 2 k 2 k 2 k 2 k 6 2 4 3 6 2 4 3 " 2 " 2 ) $ ' % " 2 " 2 ) $ ' % $ 3 4 0 3 , $ 3 4 0 3 , 4 " 5
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# 2 ! & 4 2 2 # 9 n & # 9 n & # n & 8 # n & 8 # n & # n & $ 0 + % $ 0 + % # 9 + u & 6 # 9 + u & 6 # n & # n & " 2 # / . 4 $ 2 ! ) . 3 / 5 2 # % # / . 4 2 / , 6 $ $ & " 5 6 ) 0 % 2 , . " 2 # / . 4 $ 2 ! ) . 3 / 5 2 # % # / . 4 2 / , 6 $ $ & " 5 6 ) 0 % 2 , . * # / . * # / . 4 4 2 ! . 3 & / 2 - % 2 4 4 2 ! . 3 & / 2 - % 2 2 k 2 k # n & # n & $ 3 4 4 ( , $ 3 4 4 ( , $ . $ . / 0 4 / 0 # $ / 0 4 / 0 # $ # u & 6 # u & 6 * # / . * # / . * # / . * # / . * # / . * # / . 2 k 2 k 2 k 2 k * # / . * # / . * # / . * # / .
STEVAL-ISA058V1 revision history doc id 16146 rev 1 3/4 2 revision history table 1. document revision history date revision changes 26-aug-2009 1 initial release.
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