参数资料
| 型号： | BD8966FVM-TR |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 8/19页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.8A MSOP8 |
| 标准包装： | 3,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1 V ~ 2.5 V |
| 输入电压： | 4 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 800mA |
| 同步整流器： | 是 |
| 工作温度： | -25°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-VSSOP，8-MSOP（0.110"，2.80mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-MSOP |
BD8966FVM
Datasheet
● Application Information
Operation
BD8966FVM is a synchronous rectifying step-down switching regulator that achieves faster transient response by
employing current mode PWM control system.
○ Synchronous rectifier
It does not require the power to be dissipated by a rectifier externally connected to a conventional DC/DC converter IC,
and its P.N junction shoot-through protection circuit limits the shoot-through current during operation, by which the power
dissipation of the set is reduced.
○ Current mode PWM control
Synthesizes a PWM control signal with a inductor current feedback loop added to the voltage feedback.
? PWM (Pulse Width Modulation) control
The oscillation frequency for PWM is 1 MHz. SET signal form OSC turns ON a P-channel MOS FET (while a
N-channel MOS FET is turned OFF), and an inductor current I L increases. The current comparator (Current Comp)
receives two signals, a current feedback control signal (SENSE: Voltage converted from I L ) and a voltage feedback
control signal (FB), and issues a RESET signal if both input signals are identical to each other, and turns OFF the
P-channel MOS FET (while a N-channel MOS FET is turned ON) for the rest of the fixed period. The PWM control
repeats this operation.
SENSE
V OUT
Level
Shift FB
Gm Amp.
ITH
Current
Comp
RESET
SET
OSC
R Q
S
Driver
Logic
SW
I L
Load
V OUT
Fig.18 Diagram of current mode PWM control
Current
Comp
PV CC
SENSE
FB
SET
RESET
SW
I L
V OUT
Fig.19 PWM switching timing chart
GND
GND
GND
I L (AVE)
V OUT (AVE)
www.rohm.com
? ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
8/17
TSZ02201-0J3J0AJ00060-1-2
02.MAR.2012. Rev.001
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BD8966FVM--TR | 制造商:ROHM 制造商全称:Rohm 功能描述:Low Noise High Efficiency Step-down Switching Regulator with Built-in Power MOSFET |
| BD8967FVM | 制造商:ROHM 制造商全称:Rohm 功能描述:4.5V to 5.5V, 0.8A 1ch Synchronous Buck Converter integrated FET |
| BD8967FVM_12 | 制造商:ROHM 制造商全称:Rohm 功能描述:4.5V to 5.5V, 0.8A 1ch Synchronous Buck Converter integrated FET |
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| BD896A | 功能描述:达林顿晶体管 70W PNP Silicon RoHS:否 制造商:Texas Instruments 配置:Octal 晶体管极性:NPN 集电极—发射极最大电压 VCEO:50 V 发射极 - 基极电压 VEBO: 集电极—基极电压 VCBO: 最大直流电集电极电流:0.5 A 最大集电极截止电流: 功率耗散: 最大工作温度:+ 150 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-18 封装:Reel |
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