参数资料
| 型号： | SQ24T10050-NAB0 |
| 厂商： | Power-One |
| 文件页数： | 7/70页 |
| 文件大小： | 0K |
| 描述： | DC/DC EIGHTH BRICK |
| 标准包装： | 100 |
| 系列： | * |
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SQ24 Series DC-DC Converter Data Sheet
18-36 VDC Input; Standard Outputs from 1-12 VDC
Start-up Information (using negative ON/OFF)
Scenario #1: Initial Start-up From Bulk Supply
V IN
ON/OFF function enabled, converter started via application of V IN .
See Figure E.
Time Comments
t 0 ON/OFF pin is ON; system front end power is toggled
on, V IN to converter begins to rise.
t 1 V IN crosses Under-Voltage Lockout protection circuit
threshold; converter enabled.
t 2 Converter begins to respond to turn-on command
(converter turn-on delay).
ON/OFF
STATE
V OUT
OFF
ON
t 3 Converter V OUT reaches 100% of nominal value.
For this example, the total converter start-up time (t 3 - t 1 ) is typically
4 ms.
t 0
t 1 t 2
t 3
t
Fig. E: Start-up scenario #1
Scenario #2: Initial Start-up Using ON/OFF Pin
With V IN previously powered, converter started via ON/OFF pin.
See Figure F.
Time Comments
t 0 V INPUT at nominal value.
t 1 Arbitrary time when ON/OFF pin is enabled (converter
enabled).
t 2 End of converter turn-on delay.
t 3 Converter V OUT reaches 100% of nominal value.
For this example, the total converter start-up time (t 3 - t 1 ) is typically
4 ms.
V IN
ON/OFF
STATE OFF
ON
V OUT
Scenario #3: Turn-off and Restart Using ON/OFF Pin
With V IN previously powered, converter is disabled and then
enabled via ON/OFF pin. See Figure G.
Time Comments
t 0 V IN and V OUT are at nominal values; ON/OFF pin ON.
t 1 ON/OFF pin arbitrarily disabled; converter output falls
to zero; turn-on inhibit delay period (100 ms typical) is
initiated, and ON/OFF pin action is internally inhibited.
t 2
ON/OFF pin is externally re-enabled.
If (t 2 - t 1 ) ≤ 100 ms , external action of ON/OFF pin
is locked out by start-up inhibit timer.
V IN
t 0 t 1 t 2 t 3
Fig. F: Start-up scenario #2.
t
t 3
If (t 2 - t 1 ) > 100 ms , ON/OFF pin action is internally
enabled.
Turn-on inhibit delay period ends. If ON/OFF pin is ON,
converter begins turn-on; if off, converter awaits
ON/OFF
STATE OFF
100 ms
ON/OFF pin ON signal; see Figure F.
t 4 End of converter turn-on delay.
t 5 Converter V OUT reaches 100% of nominal value.
For the condition, (t 2 - t 1 ) ≤ 100 ms , the total converter start-up
time (t 5 - t 2 ) is typically 104 ms. For (t 2 - t 1 ) > 100 ms , start-up will
be typically 4 ms after release of ON/OFF pin.
V OUT
ON
t 0
t 1
t 2
t 3 t 4
t 5
t
Fig. G: Start-up scenario #3.
MCD10159 Rev. 1.2, 20-Apr-12
Page 7 of 70
www.power-one.com
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