参数资料
| 型号： | SQM48T25033-NCB0 |
| 厂商： | Power-One |
| 文件页数： | 3/30页 |
| 文件大小： | 0K |
| 描述： | DC/DC EIGHTH BRICK |
| 标准包装： | 250 |
| 系列： | * |
第1页第2页当前第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页
SQM48 Series Data Sheet
SemiQ
TM
Family 25A DC-DC Converters
Operation
Input and Output Impedance
These power converters have been designed to be stable
with no external capacitors when used in low inductance in-
put and output circuits.
However, in many applications, the inductance associated
with the distribution from the power source to the input of the
converter can affect the stability of the converter. The addi-
tion of a 33 μF electrolytic capacitor with an ESR < 1 ?
across the input helps ensure stability of the converter. In
tion 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 con-
verter 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).
Semi Q Family
many applications, the user has to use decoupling capacit-
ance at the load. The power converter will exhibit stable op-
eration with external load capacitance up to 20,000 μF on
2.5 – 1.2 V outputs.
Vin
Vin (+)
ON/OFF
TM
(Top View)
Converter Vout (+)
100
SENSE (+)
TRIM
Rw
Rload
SENSE (-)
ON/OFF (Pin 2)
Vin (-)
Vout (+)
10
Rw
The ON/OFF pin is used to turn the power converter on or
off remotely via a system signal. There are two remote con-
trol options available, positive logic and negative logic and
both are referenced to Vin(-). Typical connections are shown
in Fig. A.
Fig. B: Remote sense circuit configuration.
If remote sensing is not required, the SENSE(-) pin must be
connected to the Vout(-) pin (Pin 4), and the SENSE(+) pin
Semi Q Family
Vin (+)
TM
Converter
(Top View)
Vout (+)
SENSE (+)
must be connected to the Vout(+) pin (Pin 8) to ensure the
converter will regulate at the specified output voltage. If
these connections are not made, the converter will deliver an
Vin
CONTROL
INPUT
ON/OFF
Vin (-)
TRIM
SENSE (-)
Vout (-)
Rload
output voltage that is slightly higher than the specified value.
Because the sense leads carry minimal current, large traces
on the end-user board are not required. However, sense
traces should be located close to a ground plane to minimize
system noise and insure optimum performance. When wiring
Fig. A: Circuit configuration for ON/OFF function.
The positive logic version turns on when the ON/OFF pin is
at logic high and turns off when at logic low. The converter is
on when the ON/OFF pin is left open .
The negative logic version turns on when the pin is at logic
low and turns off when the pin is at 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.
ON/OFF pin is internally pulled-up to 5 V through a resistor.
A 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 vol-
tage of ? 0.8 V. An external voltage source of ± 20 V max.
may be connected directly to the ON/OFF input, in which
case it should be capable of sourcing or sinking (depending
on the signal polarity) up to 1 mA. See the Start-up Informa-
discretely, twisted pair wires should be used to connect the
sense lines to the load to reduce susceptibility to noise.
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 capabili-
ty of the converter, equal to the product of the nominal out-
put voltage and the allowable output current for the given
conditions.
When using remote sense, the output voltage at the conver-
ter 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
MCD10085 Rev. 1.1, 08-Jul-10
Page 3 of 30
www.power-one.com
相关PDF资料 |
PDF描述 |
|---|---|
| SQM48T25033-NCC0 | DC/DC EIGHTH BRICK |
| UEE-3.3/25-D48PM-C | 36-75VIN 3.3VOUT 83W POS LOG SMD |
| 74ABT827PW,118 | IC BUFF DVR TRI-ST 10BIT 24TSSOP |
| N74F367D,602 | IC BUFFER DVR HEX N-INV 16SOICN |
| N74F367D,623 | IC BUFFER DVR HEX N-INV 16SOICN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADA4665-2ARZ | 制造商:Analog Devices 功能描述:IC OP-AMP 1.2MHZ 1V/ SOIC-8 制造商:Analog Devices 功能描述:IC, OP-AMP, 1.2MHZ, 1V/ us, SOIC-8 |
| ADA4665-2ARZ-R7 | 功能描述:IC OPAMP GP R-R CMOS DUAL 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 产品培训模块:Differential Circuit Design Techniques for Communication Applications 标准包装:1 系列:- 放大器类型:RF/IF 差分 电路数:1 输出类型:差分 转换速率:9800 V/µs 增益带宽积:- -3db带宽:2.9GHz 电流 - 输入偏压:3µA 电压 - 输入偏移:- 电流 - 电源:40mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):3 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VQFN 裸露焊盘，CSP 供应商设备封装:16-LFCSP-VQ 包装:剪切带 (CT) 产品目录页面:551 (CN2011-ZH PDF) 其它名称:ADL5561ACPZ-R7CT |
| ADA4665-2ARZ-RL | 功能描述:IC OPAMP GP R-R CMOS DUAL 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:160 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:10 V/µs 增益带宽积:9MHz -3db带宽:- 电流 - 输入偏压:1pA 电压 - 输入偏移:250µV 电流 - 电源:730µA 电流 - 输出 / 通道:28mA 电压 - 电源，单路/双路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:管件 |
| ADA4666-2 | 制造商:AD 制造商全称:Analog Devices 功能描述:18 V, 725 A, 4 MHz CMOS RRIO Operational Amplifier |
| ADA4666-2ACPZ-R7 | 制造商:Analog Devices 功能描述:AMPLIFIER - OP AMPS |
发布紧急采购，3分钟左右您将得到回复。