参数资料
| 型号： | BD9845FV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 14-SSOP |
| 标准包装： | 1 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 1.5MHz |
| 占空比： | 100% |
| 电源电压： | 3.6 V ~ 35 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 14-LSSOP（0.173"，4.40mm 宽） |
| 包装： | 标准包装 |
| 产品目录页面： | 1373 (CN2011-ZH PDF) |
| 其它名称： | BD9845FV-E2DKR |
BD9845FV
Technical Note
5) About board layout
In order to make full use of IC performance, fully investigate the items below in addition to general precautions.
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Each output of OCP+/OCP- is such a sensitive circuit. When wiring is routed around, it is easily subjected to noise.
Try to make the wiring as short as possible.
Switching of large current is likely to generate noise. Try to make the large current route (VIN, Rsense, FET, L, Di,
and Cout) as thick and short as possible, and try to apply one-point grounding for GND. OUT terminal is also a
switching line, and it must be wired along a distance as short as possible. (When multi-layer board is used, shielding
by intermediate layer also seems to be effective.)
C CT and C VREF are reference of all, and must be wired along the shortest distance to GND of IC stabilized to be
protected against external influence.
Also be careful not to allow common impedance to sense family GND.
6) PIN processing of channel unused
VREF
VREF
VCC VCC
VREF DT
SS
INV
FB
OCP- OCP+ VCC OUT
1
14
13
12
11
9
8
7
6
Fig.43
When only one channel is used, process unused channels as shown above.
● I/O equivalent circuit diagram
2pin(CT)
14pin (DT)
13pin (SS)
VREF
VREF
VREF
VREF
VREF
VREF
VREF
VREF
VREF
VCC
CT
DT
SS
VREF
12pin (INV)
11pin (FB)
9pin (OCP-)
VREF
VREF
VREF
VREF
VCC
VCC
INV
FB
OCP-
C5V
C5V
5pin (C5V)
6pin (OUT)
8pin (OCP+)
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
C5V
OUT
OCP+
C5V
C5V
C5V
C5V
4pin (STB)
10pin (SEL)
1pin (VREF)
3pin (GND) , 7pin (VCC)
VCC
VCC
VCC
VCC
VCC
STB
SEL
VREF
GND
www.rohm.com
? 2011 ROHM Co., Ltd. All rights reserved.
13/15
2011.08 - Rev.D
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BD9846FV | 制造商:ROHM 制造商全称:Rohm 功能描述:Silicon Monolithic Integrated Circuit |
| BD9846FV-E2 | 功能描述:IC REG CTRLR BUCK PWM 20-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| BD9848FV | 制造商:ROHM 制造商全称:Rohm 功能描述:Silicon Monolithic Integrated Circuit |
| BD9848FV-E2 | 制造商:ROHM Semiconductor 功能描述: |
| BD9850FVM | 制造商:ROHM 制造商全称:Rohm 功能描述:Single-output High-frequency Step-down Switching Regulator(Controller type) |
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