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| 型号： | MAX8760ETL+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/39页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR QUICK PWM 40-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 系列： | Quick-PWM™ |
| 应用： | 控制器，6 位 VID AMD 移动式 Turion? |
| 输入电压： | 4 V ~ 28 V |
| 输出数： | 2 |
| 输出电压： | 0.38 V ~ 1.55 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（6x6） |
| 包装： | 管件 |
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Dual-Phase, Quick-PWM Controller for AMD
Mobile Turion 64 CPU Core Power Supplies
Pin Description (continued)
PIN
32
33
34
35
36
37
38
39
40
NAME
DLS
DHS
LXS
BSTS
V+
CMP
CMN
CSN
CSP
FUNCTION
Secondary Low-Side Gate-Driver Output. DLS swings from PGND to V DD . DLS is forced high after the
MAX8760 powers down.
Secondary High-Side Gate-Driver Output. Swings LXS to BSTS.
Secondary Inductor Connection. LXS is the internal lower supply rail for the DHS high-side gate driver.
Secondary Boost Flying Capacitor Connection. An optional resistor in series with BSTS allows the DHS
pullup current to be adjusted.
Battery Voltage-Sense Connection. Used only for PWM one-shot timing. DH_ on-time is inversely
proportional to input voltage over a 4V to 28V range.
Main Inductor Positive Current-Sense Input
Main Inductor Negative Current-Sense Input
Secondary Inductor Positive Current-Sense Input
Secondary Inductor Negative Current-Sense Input
Detailed Description
Dual 180° Out-of-Phase Operation
The two phases in the MAX8760 operate 180° out-of-
phase ( SKIP = REF or high) to minimize input and output
filtering requirements, reduce electromagnetic interfer-
ence (EMI), and improve efficiency. This effectively low-
ers component count—reducing cost, board space, and
component power requirements—making the MAX8760
ideal for high-power, cost-sensitive applications.
Typically, switching regulators provide transfer power
using only one phase instead of dividing the power
among several phases. In these applications, the input
capacitors must support high-instantaneous current
requirements. The high-RMS ripple current can lower
efficiency due to I 2 R power loss associated with the input
capacitor’s effective series resistance (ESR). Therefore,
the system typically requires several low-ESR input
capacitors in parallel to minimize input voltage ripple, to
reduce ESR-related power losses, and to meet the nec-
essary RMS ripple current rating.
With the MAX8760, the controller shares the current
between two phases that operate 180° out-of-phase, so
the high-side MOSFETs never turn on simultaneously
during normal operation. The instantaneous input cur-
rent of either phase is effectively cut in half, resulting in
reduced input voltage ripple, ESR power loss, and RMS
ripple current (see the Input Capacitor Selection sec-
tion). As a result, the same performance can be
achieved with fewer or less-expensive input capacitors.
Table 1 lists component selection for standard multi-
phase selections and Table 2 is a list of component
suppliers.
Transient Overlap Operation
When a transient occurs, the response time of the con-
troller depends on how quickly it can slew the inductor
current. Multiphase controllers that remain 180 degrees
out-of-phase when a transient occurs actually respond
slower than an equivalent single-phase controller. To
provide fast transient response, the MAX8760 supports
a phase-overlap mode, which allows the dual regula-
tors to operate in-phase when heavy-load transients are
detected, reducing the response time. After either high-
side MOSFET turns off, if the output voltage does not
exceed the regulation voltage when the minimum off-
time expires, the controller simultaneously turns on both
high-side MOSFETs during the next on-time cycle. This
maximizes the total inductor current slew rate. The
phases remain overlapped until the output voltage
exceeds the regulation voltage after the minimum off-
time expires.
After the phase-overlap mode ends, the controller auto-
matically begins with the opposite phase. For example,
if the secondary phase provided the last on-time pulse
before overlap operation began, the controller starts
switching with the main phase when overlap operation
ends.
Power-Up Sequence
The MAX8760 is enabled when SHDN is driven high
(Figure 2). The reference powers up first. Once the ref-
erence exceeds its UVLO threshold, the PWM controller
evaluates the DAC target and starts switching.
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8760ETL+ | 功能描述:电流型 PWM 控制器 Dual-Phase Quick PWM 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 |
| MAX8760ETL+T | 功能描述:电流型 PWM 控制器 Dual-Phase Quick PWM 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 |
| MAX8760ETL-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 |
| MAX8760EVKIT | 功能描述:电流型 PWM 控制器 Evaluation Kit for the MAX8760 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 |
| MAX8761ETG+ | 功能描述:LCD 驱动器 Linear-Regulator LCD Panel Power Supply RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
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