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QM48T45012-NBA0G PDF预览

QM48T45012-NBA0G

更新时间： 2023-02-26 14:52:52
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页数 文件大小 规格书
36页 584K
描述
DC-DC Regulated Power Supply Module, 1 Output, 150W, Hybrid, ROHS COMPLIANT, QUARTER BRICK PACKAGE-8

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QM48T45012-NBA0G 数据手册

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QM48T45 Family DC-DC Converter Data Sheet  
36-75 VDC Input; 1.0-3.3 VDC @ 45 A Output  
VIN  
Startup Information (using negative ON/OFF)  
Scenario #1: Initial Startup From Bulk Supply  
ON/OFF function enabled, converter started via application  
of VIN. See Figure F.  
ON/OFF  
STATE  
OFF  
ON  
Time  
Comments  
t0  
ON/OFF pin is ON; system front end power is  
toggled on, VIN to converter begins to rise.  
VIN crosses Undervoltage Lockout protection  
circuit threshold; converter enabled.  
Converter begins to respond to turn-on  
command (converter turn-on delay).  
t1  
t2  
t3  
VOUT  
Converter VOUT reaches 100% of nominal value.  
t
t0  
t1 t2  
t3  
For this example, the total converter startup time (t3- t1) is  
typically 4 ms.  
Fig. F: Startup scenario #1.  
Scenario #2: Initial Startup Using ON/OFF Pin  
With VIN previously powered, converter started via  
ON/OFF pin. See Figure G.  
VIN  
Time  
t0  
t1  
Comments  
VINPUT at nominal value.  
Arbitrary time when ON/OFF pin is enabled  
(converter enabled).  
ON/OFF  
STATE  
t2  
t3  
End of converter turn-on delay.  
Converter VOUT reaches 100% of nominal value.  
OFF  
ON  
For this example, the total converter startup time (t3 - t1) is  
typically 4 ms.  
VOUT  
Scenario #3: Turn-off and Restart Using ON/OFF Pin  
With VIN previously powered, converter is disabled and  
then enabled via ON/OFF pin. See Figure H.  
Time  
t0  
Comments  
t
t0  
t1 t2  
t3  
VIN and VOUT are at nominal values; ON/OFF pin  
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.  
Fig. G: Startup scenario #2.  
t1  
VIN  
t2  
ON/OFF pin is externally re-enabled.  
If (t2 - t1) ≤ 100 ms, external action of  
ON/OFF pin is locked out by startup inhibit  
timer.  
100 ms  
ON/OFF  
STATE  
If (t2 - t1) > 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 pin ON signal; see Figure G.  
End of converter turn-on delay.  
OFF  
ON  
t3  
t4  
t5  
VOUT  
Converter VOUT reaches 100% of nominal value.  
For the condition (t2 - t1) ≤ 100 ms, the total converter  
startup time (t5-t2) is typically 104 ms. For (t2-t1) > 100 ms,  
startup will be typically 4 ms after release of ON/OFF pin.  
t
t0  
t1  
t2  
t3 t4  
t5  
Fig. H: Startup scenario #3.  
MCD10073 Rev. 1.0  
Page 6 of 36  
www.power-one.com  
1...3456789...36

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