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AFL12009SXPBF

更新时间： 2024-01-14 04:09:55

品牌	Logo	应用领域
英飞凌 - INFINEON		转换器
页数	文件大小	规格书
11页	122K
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AFL12009SXPBF 数据手册

AFL50XXS Series

Input Filter

Finding a resistor value for a particular output voltage, is

simply a matter of substituting the desired output voltage

and the nominal device voltage into the equation and solv-

The AFL50XXS series converters incorporate a LC input

filter whose elements dominate the input load impedance

characteristic at turn-on. The input circuit is as shown in

Figure IV.

ing for the corresponding resistor value.

Figure V. Connection for V_OUTAdjustment

Figure IV. Input Filter Circuit

Enable 2

0.75µH

R_ADJ

Pin 1

+ Sense

AFL50xxS

- Sense

2.7µfd

Return

To Load

+ V

out

Pin 2

Note: R_adjmust be set ≥ 500Ω

Undervoltage Lockout

Attempts to adjust the output voltage to a value greater than

120% of nominal should be avoided because of the poten-

tial of exceeding internal component stress ratings and

subsequent operation to failure. Under no circumstance

should the external setting resistor be made less than 500W.

By remaining within this specified range of values, com-

pletely safe operation fully within normal component derat-

ing limits is assured.

A minimum voltage is required at the input of the converter

to initiate operation. This voltage is set to 26.5 ± 1.5 volts. To

preclude the possibility of noise or other variations at the

input falsely initiating and halting converter operation, a hys-

teresis of approximately 2 volts is incorporated in this cir-

cuit. Thus if the input voltage droops to 24.5 ± 1.5 volts, the

converter will shut down and remain inoperative until the

input voltage returns to ≈ 25 volts.

Examination of the equation relating output voltage and re-

sistor value reveals a special benefit of the circuit topology

utilized for remote sensing of output voltage in the AFL50XXS

series of converters. It is apparent that as the resistance

increases, the output voltage approaches the nominal set

value of the device. In fact the calculated limiting value of

output voltage as the adjusting resistor becomes very large

OutputVoltage Adjust

In addition to permitting close voltage regulation of remotely

located loads, it is possible to utilize the converter sense

pins to incrementally increase the output voltage over a

limited range.The adjustments made possible by this method

are intended as a means to “trim” the output to a voltage

setting for some particular application, but are not intended

to create an adjustable output converter. These output

voltage setting variations are obtained by connecting an

appropriate resistor value between the +sense and -sense

pins while connecting the -sense pin to the output return pin

as shown in Figure V. below. The range of adjustment and

corresponding range of resistance values can be deter-

is ≈ 25mV above nominal device voltage.

The consequence is that if the +sense connection is unin-

tentionally broken, an AFL50XXS has a fail-safe output volt-

age of Vout + 25mV, where the 25mV is independent of the

nominal output voltage. It can be further demonstrated that

in the event of both the + and - sense connections being

broken, the output will be limited to Vout + 440mV. This 440

mV is also essentially constant independent of the nominal

mined by use of the following equation.

output voltage.

NOM

adj

= 100•

OUT

NOM

- V

-.025

Where V_NOM= device nominal output voltage, and

V_OUT= desired output voltage

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与AFL12009SXPBF相关器件

型号	品牌	获取价格	描述	数据表
AFL12009SY	INFINEON	获取价格	HYBRID-HIGH RELIABILITY DC/DC CONVERTER
AFL12009SY/CH	INFINEON	获取价格	HYBRID-HIGH RELIABILITY DC/DC CONVERTER
AFL12009SY/CHPBF	INFINEON	获取价格	DC-DC Regulated Power Supply Module, 1 Output, 90W, Hybrid, 0.380 INCH, LOW PROFILE, SEAM
AFL12009SY/ES	INFINEON	获取价格	HYBRID-HIGH RELIABILITY DC/DC CONVERTER
AFL12009SY/ESPBF	INFINEON	获取价格	DC-DC Regulated Power Supply Module, 1 Output, 90W, Hybrid, 0.380 INCH, LOW PROFILE, SEAM
AFL12009SY/HB	INFINEON	获取价格	HYBRID-HIGH RELIABILITY DC/DC CONVERTER
AFL12009SY/HBPBF	INFINEON	获取价格	DC-DC Regulated Power Supply Module, 1 Output, 90W, Hybrid, 0.380 INCH, LOW PROFILE, SEAM
AFL12009SY-CH	INFINEON	获取价格	ADVANCED ANALOG HIGH RELIABILITY HYBRID DC/DC CONVERTERS
AFL12009SYES	INFINEON	获取价格	HYBRID-HIGH RELIABILITY DC/DC CONVERTER
AFL12009SY-ES	INFINEON	获取价格	ADVANCED ANALOG HIGH RELIABILITY HYBRID DC/DC CONVERTERS

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