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参数资料
| 型号： | BD2041AFJ-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 16/25页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH HIGH SIDE 1CH SOP-J8 |
| 特色产品： | High Side Switch Regulators |
| 标准包装： | 1 |
| 类型： | 高端 |
| 输入类型： | 非反相 |
| 输出数： | 1 |
| 导通状态电阻： | 80 毫欧 |
| 电流 - 输出 / 通道： | 500mA |
| 电流 - 峰值输出： | 1A |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOP-J |
| 包装： | 标准包装 |
| 其它名称： | BD2041AFJ-E2DKR |
BD2041AFJ
BD2051AFJ
Datasheet
3. Over current detection (OCD)
The over current detection circuit limits current (I SC ) and outputs error flag (/OC) when current flowing in each switch
MOSFET exceeds a specified value. There are three types of response against over current. The over current detection
circuit works when the switch is on (EN,/EN signal is active).
3-1. When the switch is turned on while the output is in shortcircuit status
When the switch is turned on while the output is in shortcircuit status or so, the switch gets in current limit status
soon.
3-2. When the output shortcircuits while the switch is on
When the output shortcircuits or large capacity is connected while the switch is on, very large current flows until the
over current limit circuit reacts. When the current detection, limit circuit works, current limitation is carried out.
3-3. When the output current increases gradually
When the output current increases gradually, current limitation does not work until the output current exceeds the
over current detection value. When it exceeds the detection value, current limitation is carried out.
4. Under voltage lockout (UVLO)
UVLO circuit prevents the switch from turning on until the V IN exceeds 2.3V(Typ.). If the V IN drops below 2.2V(Typ.) while
the switch turns on, then UVLO shuts off the power switch. UVLO has hysteresis of a 100mV(Typ).
Under voltage lockout circuit works when the switch is on (EN,/EN signal is active).
5. Error flag (/OC) output
Error flag output is N-MOS open drain output. At detection of over current, thermal shutdown, low level is output.
Over current detection has delay filter. This delay filter prevents instantaneous current detection such as inrush current at
switch on, hot plug from being informed to outside.
V /EN
V OUT
Output shortcircuit
Thermal shut down
I OUT
V /OC
delay
Figure 36. Over current detection, thermal shutdown timing
(BD2041AFJ)
V EN
V OUT
Output shortcircuit
Thermal shut down
I OUT
V /OC
delay
Figure 37. Over current detection, thermal shutdown timing
(BD2051AFJ)
www.rohm.com
? 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
16/22
TSZ02201-0E3E0H300290-1-2
08.Mar.2013 Rev.001
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BD2042AFJ | 制造商:ROHM 制造商全称:Rohm 功能描述:2ch High Side Switch ICs for USB Devices and Memory Cards |
| BD2042AFJ-E2 | 功能描述:开关变换器、稳压器与控制器 2Ch; Lg Current Out USB High Side Switch RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| BD2045AFJ | 制造商:ROHM 制造商全称:Rohm 功能描述:1ch High Side Switch ICs for USB Devices and Memory Cards |
| BD2045AFJ_09 | 制造商:ROHM 制造商全称:Rohm 功能描述:1ch Small Current Output USB High Side Switch ICs |
| BD2045AFJ_11 | 制造商:ROHM 制造商全称:Rohm 功能描述:1ch High Side Switch ICs for USB Devices and Memory Cards |
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