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参数资料
| 型号： | MAX17410GTM+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 44/45页 |
| 文件大小： | 0K |
| 描述： | IC CTLR QPWM 2PH FOR IMV 48TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | * |
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Dual-Phase, Quick-PWM Controller
for IMVP6+ CPU Core Power Supplies
V IN(MIN) = 2 × ?
? 1 - 2 × ( 0 . 4 μs × 1 . 5 × 3 00 kHz ) ?
V IN(MIN) = 2 × ?
? 1 - 2 × ( 0 . 4 μs × 1 . 0 × 3 00 kHz ) ?
If the calculated V IN(MIN) is greater than the required
minimum input voltage, then reduce the operating fre-
quency or add output capacitance to obtain an accept-
able V SAG . If operation near dropout is anticipated,
calculate V SAG to be sure of adequate transient
response.
Dropout Design Example:
V FB = 1.4V
f SW = 300kHz
t OFF(MIN) = 400ns
V DROOP = 3mV/A x 30A = 90mV
V DROP1 = V DROP2 = 150mV (30A load)
h = 1.5 and η TOTAL = 2
? 1 . 4 V - 90 mV + 150 mV ?
?
+ 150 mV - 150 mV + 90 mV = 4 . 96 V
Calculating again with h = 1 gives the absolute limit of
dropout:
? 1 . 4 V - 90 mV + 150 mV ?
?
+ 150 mV - 150 mV + 90 mV = 4 . 07 V
Therefore, V IN must be greater than 4.1V, even with
very large output capacitance, and a practical input volt-
age with reasonable output capacitance would be 5.0V.
Applications Information
PCB Layout Guidelines
Careful PCB layout is critical to achieve low switching
losses and clean, stable operation. The switching
power stage requires particular attention. If possible,
mount all of the power components on the top side of
the board with their ground terminals flush against one
another. Refer to the MAX17410 evaluation kit specifi-
cation for a layout example and follow these guidelines
for good PCB layout:
1) Keep the high-current paths short, especially at the
ground terminals. This is essential for stable, jitter-
free operation.
2) Connect all analog grounds to a separate solid cop-
per plane, which connects to the GND pin of the
Quick-PWM controller. This includes the V CC
bypass capacitor and GNDS bypass capacitors.
3) Keep the power traces and load connections short.
This is essential for high efficiency. The use of thick
copper PCBs (2oz vs. 1oz) can enhance full-load
efficiency by 1% or more. Correctly routing PCB
traces is a difficult task that must be approached in
terms of fractions of centimeters, where a single m Ω
of excess trace resistance causes a measurable
efficiency penalty.
4) Keep the high-current, gate-driver traces (DL_,
DH_, LX_, and BST_) short and wide to minimize
trace resistance and inductance. This is essential
for high-power MOSFETs that require low-imped-
ance gate drivers to avoid shoot-through currents.
5) CSP_ and CSN_ connections for current limiting
and voltage positioning must be made using Kelvin
sense connections to guarantee the current-sense
accuracy.
6) When trade-offs in trace lengths must be made, it is
preferable to allow the inductor-charging path to be
made longer than the discharge path. For example,
it is better to allow some extra distance between the
input capacitors and the high-side MOSFET than to
allow distance between the inductor and the low-
side MOSFET or between the inductor and the out-
put filter capacitor.
7) Route high-speed switching nodes away from sen-
sitive analog areas (CCI, FB, CSP_, CSN_, etc.).
Layout Procedure
1) Place the power components first, with ground ter-
minals adjacent (low-side MOSFET source, C IN ,
C OUT , and D1 anode). If possible, make all these
connections on the top layer with wide, copper-
filled areas.
2) Mount the controller IC adjacent to the low-side
MOSFET. The DL gate traces must be short and
wide (50 mils to 100 mils wide if the MOSFET is 1in
from the controller IC).
3) Group the gate-drive components (BST diodes and
capacitors, V DD bypass capacitor) together near
the controller IC.
44
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17411GTM+ | 功能描述:电流型 PWM 控制器 IMVP7 CPU & Graphics Controller 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 |
| MAX17411GTM+T | 功能描述:电流型 PWM 控制器 IMVP7 CPU & Graphics Controller 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 |
| MAX17411RGTM+ | 功能描述:电流型 PWM 控制器 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 |
| MAX17411RGTM+T | 功能描述:电流型 PWM 控制器 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 |
| MAX17411RGTM+TW | 功能描述:电流型 PWM 控制器 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 |
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