参数资料
| 型号： | BD2046AFJ-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 15/25页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH HIGH SIDE 2CH 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： | 2 |
| 导通状态电阻： | 100 毫欧 |
| 电流 - 输出 / 通道： | 250mA |
| 电流 - 峰值输出： | 500mA |
| 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 |
| 产品目录页面： | 1371 (CN2011-ZH PDF) |
| 其它名称： | BD2046AFJ-E2DKR |
BD2046AFJ
BD2056AFJ
Datasheet
● Typical Application Circuit
5V(Typ)
10k to 100k
10k to 100k
VBUS
IN
OUT
ON/OFF
GND
/OC1
D+
C L
OC
IN
OUT1
D-
GND
Regulator
OC
ON/OFF
C IN
/EN1
(EN1)
/EN2
(EN2)
OUT2
/OC2
C L
Data
Data
BD2046AFJ/56AFJ
USB Controller
Data
● Application Information
When excessive current flows due to output short-circuit or so, ringing occurs because of inductance between power source
line to IC, and may cause bad influences on IC operations. In order to avoid this case, connect a bypass capacitor across
IN terminal and GND terminal of IC. 1 μ F or higher is recommended.
Pull up /OC output by resistance of 10k ? to 100k ? .
Set up value which satisfies the application as C L .
This application circuit does not guarantee its operation.
When using the circuit with changes to the external circuit constants, make sure to leave an adequate margin for external
components including AC/DC characteristics as well as dispersion of the IC.
● Functional Description
1. Switch operation
IN terminal and OUT terminal are connected to the drain and the source of switch MOSFET respectively. The IN terminal
is used also as power source input to internal control circuit.
When the switch is turned on from EN/EN control input, the IN terminal and OUT terminal are connected by a 100m ?
switch. In ON status, the switch is bidirectional. Therefore, when the potential of OUT terminal is higher than that of the
IN terminal, current flows from OUT terminal to IN terminal.
Since a parasitic diode between the drain and the source of switch MOSFET is canceled, in the off status, it is possible
to prevent current from flowing reversely from OUT to IN.
2. Thermal shutdown circuit (TSD)
Thermal shutdown circuit have dual thermal shutdown threshold. Since thermal shutdown works at a lower junction
temperature when an overcurrent occurs, only the switch of an overcurrent state become off and error flag is output.
Thermal shut down action has hysteresis. Therefore, when the junction temperature goes down, switch on and error flag
output automatically recover. However, until cause of junction temperature increase such as output short circuit is
removed or the switch is turned off, thermal shutdown detection and recovery are repeated. The thermal shutdown circuit
works when the switch of either OUT1 or OUT2 is on (EN,/EN signal is active).
www.rohm.com
? 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
15/22
TSZ02201-0E3E0H300140-1-2
11.Mar.2013 Rev.001
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