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| 型号： | MAX8810AETM+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 38/50页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR PWM W/MOSFET 48TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 应用： | 控制器，Intel VR10、VR11 |
| 输入电压： | 4.5 V ~ 5.5 V |
| 输出数： | 1 |
| 输出电压： | 0.5 V ~ 1.6 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-WFQFN 裸露焊盘 |
| 供应商设备封装： | 48-TQFN-EP（6x6） |
| 包装： | 管件 |
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VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM
Controllers with Integrated Dual MOSFET Drivers
where g MV is the transconductance of the error amplifi-
er and C COMP is a capacitor placed from the output of
the error amplifier (COMP) to GND. Solving for C COMP :
BUF
C COMP = g MV x
| G CONTR _ OUTPUT ( f CROSSOVER ) |
2 π × f CROSSOVER
MAX8810A
Multiload-Line Programming (MAX8810A)
In some applications, it may be desired to implement
multiple load-lines. This is easily accomplished by
switching resistors in parallel with R LL (Figure 12).
Paralleling resistors with R LL causes the load-line resis-
tance to increase. With this scheme implemented for
the MAX8810A, the offset voltage is not affected by the
R LL3
R LL2
R LL1
R OS
COMP
new load-line setting. It is also not necessary to change
the temperature compensation based on the new load-
line setting. Switches S1 and S2 can be implemented
with small-signal n-channel MOSFETs.
R LL1 and R OS are designed using methods described
in the Loop-Compensation Design section. R O1 , R O2 ,
and R O3 are the required load-line resistances. R LL2
and R LL3 are calculated as follows:
Figure 12. Load-Line Switching Circuit
Setting the Current Limit
The current-limit threshold sets the maximum available
output DC current. The output current limit should be
selected to meet the OTF requirement as described in
the Output Capacitor Selection section. The voltage at
ILIM and the value of the current-sense resistor or the
R LL 2 =
R COMP 2 = ×
V ILIM = G CA × R SENSE × LIM
R COMP 1 =
R LL 3 =
R COMP 3 =
×
where:
and:
where:
R COMP 1 = R LL
R COMP 1 ×
R COMP 1 ?
R O 1
R O 2
R LL 1
R LL 1
R COMP 2 ×
R COMP 2 ?
R O 2
R O 3
|| R OS
R COMP 2
R COMP 2
R COMP 1
× R OS
+ R OS
R COMP 3
R COMP 3
R COMP2
DC resistance of the output inductor sets the current-
limit threshold:
I
N
where R SENSE is the resistance of the current-sensing
element. The value of R SENSE at room temperature
must be used because the MAX8809A and MAX8810A
provide temperature-compensated current limit. V ILIM
is set by connecting ILIM to the center tap of a resistor-
divider from REF to GND. Select R1 and R3 (Figure 13)
so the current through the divider is at least 10μA:
R1 + R3 < 200k Ω
A typical value for R1 is 10k Ω ; then solve for R3 using:
R 3 = R 1 ×
V LIM
2 ? V LIM
38
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|---|---|
| MAX8810AETM+ | 功能描述:电流型 PWM 控制器 VRD11/10 K8 Rev. F 2/3/4-Phase PWM Ctlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX8810AETM+T | 功能描述:电流型 PWM 控制器 VRD11/10 K8 Rev. F 2/3/4-Phase PWM Ctlr RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MAX8811EEE+ | 功能描述:功率驱动器IC High-Speed Dual Phase Driver RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX8811EEE+T | 功能描述:功率驱动器IC High-Speed Dual Phase Driver RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX8814ETA+ | 制造商:Maxim Integrated Products 功能描述:CHGR LI-ION/LI-POL 570MA 4.2V 8TDFN EP - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
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