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SE7221BK1-E Technical Product Specification
71
Figure 9. Turn On/Off Timing (Power Supply Signals)
10.2.2 Dynamic Loading
The output voltages shall remain within limits specified for the step loading and capacitive
loading specified in the table below. The load transient repetition rate shall be tested between
50Hz and 5kHz at duty cycles ranging from 10%-90%. The load transient repetition rate is only
a test specification. The ∆ step load may occur anywhere within the MIN load to the MAX load
conditions.
Table 82. Transient Load Requirements
Output
∆ Step Load Size
(See note 2)
Load Slew Rate Test capacitive Load
+3.3V 5.0A
0.25 A/µsec 250 µF
+5V 6.0A
0.25 A/µsec 400 µF
12V 9.0A
0.25 A/µsec 500 µF
+5VSB 0.5A
0.25 A/µsec 20 µF
Notes
1) Step loads on each 12V output may happen simultaneously.
2) For Load Range 2 (light system loading), the tested step load size should be 60% of those listed.
AC Input
Vout
PWOK
5VSB
PSON
T
sb_on_delay
T
AC_on_delay
T
pwok_on
T
vout_holdup
T
pwok_holdup
T
pson_on_delay
T
sb_on_delay
T
pwok_on
T
pwok_off
T
p
w
o
T
p
son_p
w
T
pwok_low
T
sb_vout
AC turn on/off cycle
PSON turn on/off cycle
T
5VSB
_
holdup