- 您现在的位置：买卖IC网 > PDF目录166429 > BD9007HFP 2 A SWITCHING REGULATOR, 505 kHz SWITCHING FREQ-MAX, PSSO7 PDF资料下载
参数资料
| 型号： | BD9007HFP |
| 元件分类： | 稳压器 |
| 英文描述： | 2 A SWITCHING REGULATOR, 505 kHz SWITCHING FREQ-MAX, PSSO7 |
| 封装： | ROHS COMPLIANT, HRP-7 |
| 文件页数： | 3/18页 |
| 文件大小： | 484K |
| 代理商： | BD9007HFP |
BD9006F, BD9006HFP, BD9007F, BD9007HFP
Technical Note
11/17
www.rohm.com
2009.05 - Rev.A
2009 ROHM Co., Ltd. All rights reserved.
Fig.24
Design Method
Sample Calculations
4. Selection of diode (D1)
Set diode rating with an adequate margin to the
maximum load current. Also, make setting of the rated
inverse voltage with an adequate margin to the
maximum input voltage.
A diode with a low forward voltage and short reverse
recovery time will provide high efficiency.
When VIN(max.)=35V
Io=(max.)2A
Diode ratings must include:
Current over 2A
Withstand minimum 35V
5. Selection of input capacitor (CIN, C28)
Two capacitors, ceramic capacitor CIN and bypass
capacitor C28 should be inserted between the VIN and
GND. Be sure to insert a ceramic capacitor of 2 to 10F
for the CIN. The capacitor C28 should have a low ESR
and a significantly large ripple current. The ripple
current IRMS can be obtained by the following formula:
Select capacitors that can accept this ripple current.
If the capacitance of CIN and C28 is not optimum, the IC
may malfunction.
Vo×(VIN-Vo)/VIN
2
When VIN=13.2V, Vo=3.3V and Io=1A:
IRMS=0.433A
3.3×(13.2-3.3)/(13.2)
2
6. Setting of oscillating frequenPcy
Referring Fig.24 on the following page, select R for the
oscillating frequency to be used.
When f=300kHz
From p.11 Fig.24, a resistance of RT=51k is selected.
RT=51k
7. Setting of phase compensation (R3 and C1)
The phase margin can be set through inserting a capacitor
or a capacitor and resistor between the INV pin and the
FB pin. Each set value varies with the output coil,
capacitance, I/O voltage, and load. Therefore, set the
phase compensation to the optimum value according to
these conditions. (For details, refer to Application circuit on
page.11～)
If this setting is not optimum, output oscillation may
result.
※
Please contact us if there are any questions regarding phase
compensation configuration.
※
The set values listed above are all reference values. On the actual mounting of the IC, the characteristics may vary with the routing of wirings
and the types of parts in use. In the connection, it is recommended to thoroughly verify these values on the actual system prior to use.
●
Directions for pattern layout of PCB
①
Arrange the wirings shown by heavy lines as short as possible in
a broad pattern.
②
Locate the input ceramic capacitor CIN as close to the VIN-GND
pin as possible.
③
Locate the RT as close to the GND pin as possible.
④
Locate the R1 and R2 as close to the INV pin as possible, and
provide the shortest wiring from the R1 and R2 to the INV pin.
⑤
Locate the R1 and R2 as far away from the L1 as possible.
⑥
Separate POWER GND (Schottky diode, I/O capacitor’s GND)
and SIGNAL GND (RT, GND), so that SW noise doesn’t have an
effect on SIGNAL GND at all.
⑦
Design the POWER wire line as wide and short as possible.
⑧
Additional pattern for C2 and C3 expand compensation flexibility.
RT
IN
V
SW
BD9006HFP
GND
V
IN
EN
FB
C28
POWER
GND
R1
R2
C2
L1
SIGNAL GND
GND
L
O
A
D
CIN
C1
C3
R3
RT
D1
①
②
⑥
⑤
④
⑧
③
IRMS=1×
√
IRMS=Io×
√
相关PDF资料 |
PDF描述 |
|---|---|
| BD9831AMWV | SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PQCC56 |
| BD9870FPS | 1.5 A SWITCHING REGULATOR, 990 kHz SWITCHING FREQ-MAX, PSSO4 |
| BDC-062BNX-014 | 62.5/125 um, MULTI MODE, DUPLEX FIBER OPTIC CONNECTOR, PLUG |
| BDC-062BNXS-014 | 9/125 um, SINGLE MODE, DUPLEX FIBER OPTIC CONNECTOR, PLUG |
| BDC-072BNX-011 | 62.5/125 um, MULTI MODE, SIMPLEX FIBER OPTIC CONNECTOR, RECEPTACLE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| BD9007HFP-TR | 功能描述:开关变换器、稳压器与控制器 Flexible Step-Down 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 |
| BD9009HFP | 制造商:ROHM 制造商全称:Rohm 功能描述:Silicon Monolithic Integrated Circuit |
| BD9009HFP-TR | 功能描述:IC REG BUCK ADJ 4A HRP7 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:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| BD900A | 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 |
| BD900A-S | 功能描述:达林顿晶体管 80V 8A PNP 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 |
发布紧急采购，3分钟左右您将得到回复。