本产品是面向工业设备市场的产品,保证可长期稳定供货。是适合这些用途的产品。本产品是无需光电耦合器的绝缘型flyback转换器为获得通过变压器绝缘的稳定的输出电压,无需以往用途中所需的光电耦合器、变压器3次绕组构成的反馈电路,大幅度减少了部件个数,可实现小型、高可靠绝缘型电源应用。采用独创的适应型导通时间控制技术,不需要以往方式中所需的外接相位补偿部件,可实现简单、高性能的绝缘型电源应用。

we recommend for your new development. it uses different production lines for the purpose of improving production efficiency. electric characteristics noted in datasheet does not differ between production line.

主要规格

 
型号 | bd7f100efj-lbe2
status | 可购买
封装 | htsop-j8
包装形态 | taping
包装数量 | 2500
最小独立包装数量 | 2500
rohs | yes

特性:

fet

integrated

controller type

pwm

output power [w]

1w@vin=5.0v 5w@vin=24v

switch current limit(typ.)[a]

1.25

vin1(min.)[v]

3

vin1(max.)[v]

40

sw frequency (max.)[khz]

400

channel

1

light load mode

yes

en

yes

soft start

yes

thermal shut-down

recovery

under voltage lock out

yes

operating temperature (min.)[°c]

-40

operating temperature (max.)[°c]

125

package size [mm]

4.9x6 (t=1)

特点:

  • guaranteed long time supply availability for
    industrial applications.
  • no need for an optocoupler or a transformer tertiary winding.
    the output voltage can be set by two external
    resistors and the transformer turns ratio.
  • uses original adapted type on-time control technology.
    high-speed load response is realized and external
    phase compensation parts are unnecessary.
  • fixed switching frequency and low output ripple
  • highly efficient light load mode available (pfm operation)
  • shutdown / enable control
  • built-in n-channel mosfet
  • soft start function
  • output load compensation function
  • protection functions:
    vin under voltage lock-out (vin uvlo)
    over current protection (ocp)
    thermal shutdown protection (tsd)

产品概要

 

产品概要

为稳定隔离电源的输出电压,一般采取使用寿命有限的光电耦合器、辅助绕组等元器件的方式。
此次rohm推出无需这些反馈电路的隔离反激式dc/dc转换器。
能轻松构成隔离电源,适用于大功率逆变器、蓄电系统、fa设备等工业设备电源。

购买样品/评估板

不仅bd7f100xxx-lb/bd7f200xxx-lb系列,搭载bd7f100hfn-lb的评估板 "bd7f100hfn-evk-001" 也开始在网上销售。
能轻松评估输入电压24v、输出电压5v、输出电流800ma的隔离电源。

评估板阵容

type part no. image ic board size
x/y [mm]
vin [v] vout
[v]
iout
[a]
user's
guide
distribution
inventory
isolated flyback dcdc converter bd7f100efj-evk-001 bd7f100efj-lb 70 / 50 24 5 1.0 check
isolated flyback dcdc converter bd7f100efj-evk-002 bd7f100efj-lb 70 / 50 24 15/-15 0.165 check
isolated flyback dcdc converter bd7f100efj-evk-003 bd7f100efj-lb 70 / 50 5 5 0.2 check
isolated flyback dcdc converter bd7f100hfn-evk-002 bd7f100hfn-lb 70 / 50 24 5 1.0 check
isolated flyback dcdc converter bd7f100hfn-evk-003 bd7f100hfn-lb 70 / 50 24 15/-15 0.165 check
isolated flyback dcdc converter bd7f100hfn-evk-004 bd7f100hfn-lb 70 / 50 5 5 0.2 check
isolated buck dcdc converter bd7f200efj-evk-001 bd7f200efj-lb 90 / 70 24 15 x 4ch 0.150 check
isolated buck dcdc converter bd7f200efj-evk-002 bd7f200efj-lb 70 / 50 24 5 2.0 check
isolated buck dcdc converter bd7f200hfn-evk-001 bd7f200hfn-lb 90 / 70 24 15 x 4ch 0.150 check
isolated buck dcdc converter bd7f200hfn-evk-002 bd7f200hfn-lb 70 / 50 24 5 2.0 check

产品阵容

型号

封装 输出功率 输入
耐压
输入电压
范围
过流
限制
开关频率 工作温度 功能
hson8
(2.9×3.0×0.6mm)
1w(vin=5v)
5w(vin=24v)
45v 3.0~40v 1.25a 400khz
(typ.)
-40℃~+125℃ enable soft start efficient light
loadmode uvlo over current
protection theminal protection
hsop-j8
(4.9×6.0×1.0mm)
hson8
(2.9×3.0×0.6mm)
10w(vin=24v) 8.0~40v 2.75a
hsop-j8
(49×6.0×1.0mm)

特点1:无需光电耦合器&辅助绕组,实现小型化

1次侧施加反馈电路时,为了检测2次侧的电压、电流,以往需要使用光电耦合器、辅助绕组及构成这些电路的元器件。新方式不需要这些电路,不仅能简化设计、而且实现小型化、省电化、高可靠性。用一个电阻即可实现稳定的输出电压。

特点2:采用自适应导通时间控制,改善负载响应特性

以往的隔离电源控制ic存在负载电流瞬间变动时会引起输出电压大变动的问题。
此次,隔离型电源控制ic采用了非隔离型电源控制ic中衍生的自适应导通时间控制。
采用rohm独有的新控制方式,输出电压变动比一般控制方式降低65%以下,即200mv(负载电流1a、上升时间100μs时),对负载电流瞬间变动具有高响应特性,有助于提高可靠性。

reference design / application evaluation kit

 
x

most viewed