- 您现在的位置：买卖IC网 > PDF目录17280 > MAX5066EVKIT (Maxim Integrated Products)EVAL KIT FOR MAX5066 PDF资料下载
参数资料
| 型号： | MAX5066EVKIT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 19/22页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX5066 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 2，非隔离 |
| 输出电压： | 0.8V，1.3V |
| 电流 - 输出： | 10A，10A |
| 输入电压： | 5 ~ 16 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 500kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX5066 |
Configurable, Single-/Dual-Output, Synchronous
Buck Controller for High-Current Applications
Table 2. Low-Side MOSFET Losses
LOSS
DESCRIPTION
SEGMENT LOSSES
P CONDUCTION = I RMS 2 × R DS ( ON )
Conduction Loss
Losses associated with MOSFET on-time, I RMS
is a function of load current and duty cycle.
where I RMS ≈
V IN ? V OUT
V IN
× I LOAD
Losses associated with charging and
Gate Drive Loss
discharging the gate of the MOSFET every
cycle. There is no Q GD charging involved in this
P GATEDRIVE = V DD × ( Q G ? Q GD ) × f SW
MOSFET due to the zero-voltage turn-on. The
charge involved is (Q G - Q GD ).
Note: The gate drive losses are distributed between the drivers and the MOSFETs in the ratio of the gate driver’s resistance and the
MOSFET’s internal gate resistance.
load step. Use a combination of SP polymer and
ceramic capacitors for better transient load and rip-
ple/noise performance.
Keep the maximum output-voltage deviation less than
Due to tolerances involved, the minimum average volt-
age at which the voltage across the current-sense
resistor is clamped is 20.4mV. Therefore, the minimum
average current limit is set at:
or equal to the adaptive voltage-positioning window
( ? V OUT ). During a load step, assume a 50% contribu-
tion each from the output capacitance discharge and
the voltage drop across the ESR ( ? V OUT = ? V ESR_OUT
I LIMIT ( MIN ) =
20 . 4 × 10 ? 3
R SENSE
R SENSE = = 2 . 04 m ?
+ ? V Q_OUT ). Use the following equations to calculate
the required ESR and capacitance value:
? V ESR _ OUT
R ESR _ OUT =
I LOAD _ STEP
I LOAD _ STEP × t RESPONSE
C OUT =
? V Q _ OUT
where I LOAD_STEP is the step in load current and
t RESPONSE is the response time of the controller.
Controller response time depends on the control-loop
bandwidth. C OUT is C6 and C7 in Figure 6.
Current Limit
The average current-mode control technique of the
MAX5066 accurately limits the maximum average out-
For example, the current-sense resistor:
20.4 mV
10 A
for a maximum output current of 10A. The standard
value is 2m ? . Also, adjust the value of the current-
sense resistor to compensate for parasitics associated
with the PC board. Select a noninductive resistor with
appropriate wattage rating.
The second type of current limit is the peak current limit
as explained in the Peak-Current Comparator section.
The third current-protection circuit is the hiccup fault
protection as explained in the Hiccup Fault Protection
section. The average current during a short at the out-
put is given by:
put current per phase. The MAX5066 senses the volt-
age across the sense resistor and limits the maximum
inductor current accordingly. Use the equations below
to calculate the current-sense resistor values:
I AVG ( SHORT ) =
1 . 41 × 10 ? 3
R SENSE
Reverse Current Limit
I LOAD ( MAX ) =
24 . 75 × 10 ? 3
R SENSE
The MAX5066 limits the reverse current when the output
capacitor voltage is higher than the preset output volt-
age. Calculate the maximum reverse current limit based
on V CLAMP_LO and the current-sense resistor R SENSE .
______________________________________________________________________________________
19
相关PDF资料 |
PDF描述 |
|---|---|
| L-14C27NJV4T | CER INDUCTOR 27NH 0603 |
| MC33385VW | IC SWITCH QUAD L-SIDE 20-HSOP |
| MC33186VW1 | IC DRIVER H-BRIDGE 20-HSOP |
| ASEK712ELC-30A-T-DK | BOARD EVAL FOR ASEK712ELC-30A |
| L-14C82NJV4T | CER INDUCTOR 82NH 0603 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5067 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Dual-Phase, +0.6V to +3.3V Output Parallelable, Average-Current-Mode Controllers |
| MAX5067ETH | 功能描述:电流型 PWM 控制器 Dual-Phase .6-3.3V Parallelable Average 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 |
| MAX5067ETH+ | 功能描述:电流型 PWM 控制器 Dual-Phase .6-3.3V Parallelable Average 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 |
| MAX5067ETH+T | 功能描述:电流型 PWM 控制器 Dual-Phase .6-3.3V Parallelable Average 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 |
| MAX5067ETH-T | 功能描述:电流型 PWM 控制器 Dual-Phase .6-3.3V Parallelable Average 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 |
发布紧急采购，3分钟左右您将得到回复。