参数资料
| 型号： | BD91361MUV-E2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 16/23页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 4A 20VQFN |
| 特色产品： | BD91x Series Step-Down Regulators |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 3.3 V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 4A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 20-VQFN |
| 其它名称： | BD91361MUV-E2DKR |
BD91361MUV
Datasheet
4. Determination of R ITH , C ITH that works as a phase compensator
As the Current Mode Control is designed to limit a inductor current, a pole (phase lag) appears in the low frequency area
due to a CR filter consisting of a output capacitor and a load resistance, while a zero (phase lead) appears in the high
frequency area due to the output capacitor and its ESR. So, the phases are easily compensated by adding a zero to the
power amplifier output with C and R as described below to cancel a pole at the power amplifier.
fp(Min.)
fp=
fz (ESR) =
Gain
[dB]
A
0
I OUT Min.
fp(Max.)
I OUT Max.
fz(ESR)
1
2 π× R O × C O
1
2 π× E SR × C O
Pole at power amplifier
fp (Min.) =
[Hz] ← with lighter load
Phase
[deg]
0
-90
When the output current decreases, the load resistance
Ro increases and the pole frequency lowers.
1
2 π× R OMax. × C O
Fig.34 Open loop gain characteristics
fp (Max.) =
1
2 π× R OMin. × C O
[Hz] ← with heavier load
fz (Amp.) =
Gain
[dB]
Phase
[deg]
A
0
0
-90
fz(Amp.)
Zero at power amplifier
Increasing capacitance of the output capacitor lowers the
pole frequency while the zero frequency does not change.
(This is because when the capacitance is doubled, the capacitor
ESR reduces to half.)
1
2 π× R ITH × C ITH
Fig.35 Error amp phase compensation characteristics
R f
C f
EN
V OUT
V CC
R2
R1
Cin
R ITH
PV CC V CC
ADJ
ITH
VID<1> VID<0> GND,PGND
SW
C BST
L
V OUT
C ITH
V CC
V CC
ESR
C O
R O
Fig.36 Typical application
Stable feedback loop may be achieved by canceling the pole fp (Min.) produced by the output capacitor and the load
resistance with CR zero correction by the error amplifier.
fz (Amp.) = fp (Min.)
1
2 π× R ITH × C ITH
=
1
2 π× R OMax. × C O
www.rohm.com
?2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
16/21
TSZ02201-0J3J0AJ00200-1-2
02.MAR.2012 Rev.001
相关PDF资料 |
PDF描述 |
|---|---|
| BD9137MUV-E2 | IC REG BUCK SYNC ADJ 4A 20VQFN |
| BD9139MUV-E2 | IC REG BUCK SYNC ADJ 3A 16VQFN |
| BD9140MUV-E2 | IC REG BUCK SYNC ADJ 2A VQFN020 |
| BD9300F-E2 | IC REG CTRLR BST INV PWM 14-SOP |
| BD9302FP-E2 | IC REG BUCK ADJ 2A DL HSOP25 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| BD91362MUV | 制造商:ROHM 制造商全称:Rohm 功能描述:Silicon Monolithic Integrated Circuit |
| BD91364BMUU-ZE2 | 功能描述:2.9V TO 5.5V INPUT, 5A INTEGRATE 制造商:rohm semiconductor 系列:* 包装:剪切带（CT） 零件状态:在售 安装类型:表面贴装 封装/外壳:20-XFQFN 裸露焊盘 标准包装:1 |
| BD9137MUV | 制造商:ROHM 制造商全称:Rohm 功能描述:2.7V to 5.5V, 4A 1ch Synchronous Buck Converter Integrated FET |
| BD9137MUV_12 | 制造商:ROHM 制造商全称:Rohm 功能描述:2.7V to 5.5V, 4A 1ch Synchronous Buck Converter Integrated FET |
| BD9137MUV-E2 | 功能描述:IC REG BUCK SYNC ADJ 4A 20VQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 同步整流器:无 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） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
发布紧急采购，3分钟左右您将得到回复。