参数资料
| 型号： | SQE48T20050-PGB0 |
| 厂商： | Power-One |
| 文件页数： | 8/14页 |
| 文件大小： | 0K |
| 描述： | DC/DC EIGHTH BRICK |
| 标准包装： | 100 |
| 系列： | * |
SQE48T20050 DC-DC Converter Data Sheet
36-75 VDC Input; 5.0 VDC @ 20 A Output
Startup Information (using negative ON/OFF)
Scenario #1: Initial Startup From Bulk Supply
ON/OFF function enabled, converter started via application
V IN
of V IN . See Figure. F.
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 Undervoltage Lockout protection
circuit threshold; converter enabled.
t 2 Converter begins to respond to turn-on
command (converter turn-on delay).
t 3 Converter V OUT reaches 100% of nominal value.
For this example, the total converter startup time (t 3 - t 1 ) is
ON/OFF
STATE
V OUT
OFF
ON
typically 4 ms.
t 0
t 1 t 2
t 3
t
Fig. F: Startup scenario #1.
Scenario #2: Initial Startup Using ON/OFF Pin
With V IN previously powered, converter started via
ON/OFF pin. See Figure. G.
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 startup time (t 3 - t 1 ) is
typically 4 ms.
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. H.
V IN
ON/OFF
STATE OFF
ON
V OUT
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
(200 ms typical) is initiated, and ON/OFF pin
V IN
t 0 t 1 t 2 t 3
Fig. G: Startup scenario #2.
t
action is internally inhibited.
t 2
ON/OFF pin is externally re-enabled.
If (t 2 - t 1 ) ≤ 200 ms , external action of
ON/OFF pin is locked out by startup inhibit
timer.
If (t 2 - t 1 ) > 200 ms , ON/OFF pin action is
internally enabled.
ON/OFF
STATE OFF
200 ms
t 3
Turn-on inhibit delay period ends. If ON/OFF pin
is ON, converter begins turn-on; if off, converter
ON
awaits ON/OFF pin ON signal; see Figure. G.
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 ) ≤ 200 ms , the total converter
startup time (t 5 -t 2 ) is typically 204 ms. F or (t 2 -t 1 ) > 200 ms ,
startup will be typically 4 ms after release of ON/OFF pin.
V OUT
t 0
t 1
t 2
t 3 t 4
t 5
t
Fig. H: Startup scenario #3.
JUL 07, 2006 revised to APR 12, 2007
Page 8 of 16
www.power-one.com
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| SQE48T30012-NGB0 | 功能描述:DC/DC转换器 RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
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