bd7f200hfn-凯发k8一触即发
无需光电耦合器的绝缘型flyback转换器主要规格
特性：
fet
integrated
controller type
pwm
output power [w]
5w@vin=12v 10w@vin=24v
switch current limit(typ.)[a]
2.75
vin1(min.)[v]
8
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]
2.9x3 (t=0.6)
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 | 数 据 表 |
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
-
- evaluation board - bd7f200hfn-evk-001
isolated flyback dcdc converter, 24vin, 15vout x4ch, 0.15a, hson8
| user's guide | schematic | part list | layout (pdf) |
|---|---|---|---|
-
- evaluation board - bd7f200hfn-evk-002
isolated flyback dcdc converter, 24vin, 5vout, 2.0a, hson8
| user's guide | schematic | part list | layout (pdf) |
|---|---|---|---|
