- 您现在的位置：买卖IC网 > Sheet目录883 > SQE48T50012-NDA0 (Power-One)DC/DC EIGHTH BRICK
SQE48T50012 DC-DC Converter
36-75 VDC Input; 1.2 VDC @ 50 A Output
Data Sheet
Operations
Input and Output Impedance
These power converters have been designed to be
stable with no external capacitors when used in low
inductance input and output circuits.
However, in some applications, the inductance
associated with the distribution from the power
source to the input of the converter can affect the
stability of the converter. A 33 μF electrolytic
capacitor with an ESR < 1 ? across the input is
on the signal polarity. See the Startup Information
section for system timing waveforms associated with
use of the ON/OFF pin.
Remote Sense (Pins 5 and 7)
The remote sense feature of the converter
compensates for voltage drops occurring between
the output pins of the converter and the load. The
SENSE(-) (Pin 5) and SENSE(+) (Pin 7) pins should
be connected at the load or at the point where
regulation is required (see Fig. B).
recommended to ensure stability of the converter.
In many applications, the user has to use decoupling
capacitance at the load. The power converter will
exhibit stable operation with external load
capacitance up to 20,000 μF.
ON/OFF (Pin 2)
Vin
Vin (+)
ON/OFF
Vin (-)
SQE48 Converter
Vout (+)
(Top View) 100
SENSE (+)
TRIM
SENSE (-)
10
Vout (-)
Rw
Rw
Rload
The ON/OFF pin is used to turn the power converter
on or off remotely via a system signal. There are two
remote control options available, positive and
negative logic, with both referenced to Vin(-). A
typical connection is shown in Fig. A.
Fig. B: Remote sense circuit configuration.
CAUTION
If remote sensing is not utilized, the SENSE(-) pin must be
connected to the Vout(-) pin (Pin 4), and the SENSE(+) pin
must be connected to the Vout(+) pin (Pin 8) to ensure the
converter will regulate at the specified output voltage. If these
Vin (+)
SQE48 Converter
(Top View)
Vout (+)
SENSE (+)
connections are not made, the converter will deliver an
output voltage that is higher than the specified data sheet
value.
Vin
ON/OFF
TRIM
Rload
Because the sense leads carry minimal current,
SENSE (-)
large traces on the end-user board are not required.
CONTROL
INPUT
Vin (-)
Vout (-)
However, sense traces should be run side by side
and located close to a ground plane to minimize
Fig. A: Circuit configuration for ON/OFF function.
The positive logic version turns on when the ON/OFF
pin is at a logic high and turns off when at a logic
low. The converter is on when the ON/OFF pin is left
open. See the Electrical Specifications for logic
high/low definitions.
The negative logic version turns on when the pin is
at a logic low and turns off when the pin is at a logic
high. The ON/OFF pin can be hard wired directly to
Vin(-) to enable automatic power up of the converter
without the need of an external control signal.
The ON/OFF pin is internally pulled up to 5 V
through a resistor. A properly de-bounced
mechanical switch, open-collector transistor, or FET
can be used to drive the input of the ON/OFF pin.
The device must be capable of sinking up to 0.2 mA
at a low level voltage of ≤ 0.8 V. An external voltage
source (±20 V maximum) may be connected directly
to the ON/OFF input, in which case it must be
capable of sourcing or sinking up to 1 mA depending
system noise and ensure optimum performance.
The converter’s output overvoltage protection (OVP)
senses the voltage across Vout(+) and Vout(-), and
not across the sense lines, so the resistance (and
resulting voltage drop) between the output pins of
the converter and the load should be minimized to
prevent unwanted triggering of the OVP.
When utilizing the remote sense feature, care must
be taken not to exceed the maximum allowable
output power capability of the converter, which is
equal to the product of the nominal output voltage
and the allowable output current for the given
conditions.
When using remote sense, the output voltage at the
converter can be increased by as much as 10%
above the nominal rating in order to maintain the
required voltage across the load. Therefore, the
designer must, if necessary, decrease the maximum
current (originally obtained from the derating curves)
by the same percentage to ensure the converter’s
ZD-01731 Rev 2.0
www.power-one.com
Page 5 of 13
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
SQL48T20033-NDA0G
CONV DC-DC 3.3V 20A 1/8 BRICK
SQM48S20033-NS00
DC/DC EIGHTH BRICK
SQM48T20010-PCB0
DC/DC EIGHTH BRICK
SRBA-03A1A0G
CONV DC/DC .75-5V ADJ 3A SMD
SRBA-03E1A0G
CONV DC/DC 3A .75-5.0V SMD
SRBA-06A2A0G
CONV DC/DC .75-5.5V ADJ 6A SMD
SRBA-06F2A0G
CONV DC/DC .75-3.63VDC 6A OUTPUT
SRBC-10A2A0G
CONV DC/DC .75-5V ADJ 10A SMD
相关代理商/技术参数
SQE48T50012-NDA0G
功能描述:DC/DC转换器 1.2Vout 50A 1.2Vout 50A 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:
SQE5-P
制造商:Power-One 功能描述:
SQETHERNET
制造商:Intel 功能描述:
SQF620001
功能描述:OSC 156.25MHZ 3.3V HCSL SMD RoHS:是 类别:晶体和振荡器 >> 振荡器 系列:SaRonix-eCera™ SQ 标准包装:1 系列:VG-4512CA 类型:VCXO 频率:153.6MHz 功能:三态（输出启用） 输出:LVPECL 电源电压:3.3V 频率稳定性:- 工作温度:-40°C ~ 85°C 电流 - 电源（最大）:60mA 额定值:- 安装类型:表面贴装 尺寸/尺寸:0.276" L x 0.197" W（7.00mm x 5.00mm） 高度:0.071"（1.80mm） 封装/外壳:6-SMD，无引线（DFN，LCC） 包装:Digi-Reel® 电流 - 电源（禁用）（最大）:- 其它名称:SER3790DKR
SQF69216
制造商:Honeywell Sensing and Control 功能描述:Pressure Transducers
SQF71K0J1453
功能描述:金属膜电阻器 - 透孔 SQF7 1K0 5% 145C 3A (METAL FILM) RoHS:否 制造商:IRC 电阻:63.4 kOhms 容差:1 % 功率额定值:100 mW 电压额定值:200 V 温度系数:100 PPM / C 端接类型:Axial 工作温度范围: 尺寸:2.3 mm Dia. x 6.4 mm L 封装:Bulk
SQF-P10
制造商:ADVANTECH 制造商全称:Advantech Co., Ltd. 功能描述:Advantech Industrial CompactFlash
SQFP100
制造商:ROHM 制造商全称:Rohm 功能描述:LSI Assembly