SQ24X03150 Power-One, SQ24X03150 Datasheet - Page 8

• Manufacturer Part Number: SQ24X03150
• Description: Sq24t/s03150 Dc-dc Converter 19-36 Vdc Input; 15 Vdc Output @ 3.3 A
• Manufacturer: Power-One

Start-up Information (using negative ON/OFF)
Scenario #1: Initial Start-up From Bulk Supply
ON/OFF function enabled, converter started via application
of V
For this example, the total converter start-up time (t
typically 4 ms.
Scenario #2: Initial Start-up Using ON/OFF Pin
With V
ON/OFF pin. See Figure F.
For this example, the total converter start-up time (t
typically 4 ms.
Scenario #3: Turn-off and Restart Using ON/OFF Pin
With V
then enabled via ON/OFF pin. See Figure G.
For the condition, (t
start-up time (t
ms, start-up will be typically 4 ms after release of ON/OFF
pin.
JAN 21, 2004 revised to AUG 23, 2006
Time
Time
Time
t
t
t
t
t
t
t
t
t
t
t
t
t
t
0
1
2
3
4
5
IN
0
1
2
3
0
1
2
3
. See Figure E.
IN
IN
previously powered, converter started via
previously powered, converter is disabled and
V
ON.
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.
ON/OFF pin is externally re-enabled.
Turn-on inhibit delay period ends. If ON/OFF pin
is ON, converter begins turn-on; if off, converter
awaits ON/OFF pin ON signal; see Figure F.
End of converter turn-on delay.
Converter V
ON/OFF pin is ON; system front end power is
toggled on, V
V
circuit threshold; converter enabled.
Converter begins to respond to turn-on
command (converter turn-on delay).
Converter V
V
Arbitrary time when ON/OFF pin is enabled
(converter enabled).
End of converter turn-on delay.
Converter V
IN
IN
INPUT
and V
crosses Under-Voltage Lockout protection
5
If (t
ON/OFF pin is locked out by start-up inhibit
timer.
If (t
internally enabled.
- t
2
at nominal value.
) is typically 104 ms. For (t
2
2
2
- t
- t
OUT
- t
1
1
) ≤ 100 ms, external action of
) > 100 ms, ON/OFF pin action is
OUT
1
OUT
OUT
) ≤ 100 ms, the total converter
are at nominal values; ON/OFF pin
IN
to converter begins to rise.
reaches 100% of nominal value.
reaches 100% of nominal value.
reaches 100% of nominal value.
Comments
Comments
Comments
2
- t
1
) > 100
3
3
- t
- t
SQ24T/S03150 DC-DC Converter Data Sheet
1
1
) is
) is
Page 8 of 15
19-36 VDC Input; 15 VDC Output @ 3.3 A
ON/OFF
ON/OFF
ON/OFF
STATE
STATE
STATE OFF
V
V
V
OUT
V
OUT
OUT
V
V
IN
IN
IN
t
t
OFF
0
0
ON
OFF
ON
ON
t
1
t
2
Fig. G: Start-up scenario #3.
Fig. F: Start-up scenario #2.
Fig. E: Start-up scenario #1
t
t
3
1
t
0
t
2
t
1
t
2
100 ms
t
3
t
3
t
www.power-one.com
4
t
5
t
t
t