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参数资料
| 型号： | MAX8760ETL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 22/39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： | 2,500 |
| 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： | 带卷 (TR) |
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Dual-Phase, Quick-PWM Controller for AMD
Mobile Turion 64 CPU Core Power Supplies
SUS
1 LSB PER R TIME CYCLE
V DAC
OUTPUT SET BY SUS AND S0, S1
OUTPUT SET BY D0–D4
t SLEW
t BLANK = 24 CLKS
t SLEW
t BLANK = 24 CLKS
TIME
CLOCK
VROK
VROK BLANKING
Figure 4. Suspend Transition
Fault Protection
Output Overvoltage Protection
The OVP circuit is designed to protect the CPU against a
shorted high-side MOSFET by drawing high current and
blowing the battery fuse. The MAX8760 continuously
monitors the output for an overvoltage fault. The controller
detects an OVP fault if the output voltage exceeds the
fixed 2.0V (typ) threshold. When the OVP circuit detects
an overvoltage fault, it immediately sets the fault latch,
turns off the high-side MOSFETs, and forces DL high.
This action discharges the output filter capacitor and
forces the output to ground. If the condition that caused
the overvoltage (such as a shorted high-side MOSFET)
persists, the battery fuse blows. The controller remains
shut down until the fault latch is cleared by toggling
SHDN or cycling the V CC power supply below 1V.
The OVP is disabled when the controller is in the no-fault
test mode (see the No-Fault Test Mode section).
Output Undervoltage Shutdown
The output UVP function is similar to foldback current
limiting, but employs a timer rather than a variable current
limit. If the MAX8760 output voltage is under 70% of the
nominal value, the controller activates the shutdown
sequence and sets the fault latch.
Once the controller ramps down to the 0V DAC code
setting, it forces the DL_ low-side gate driver high and
pulls the DH_ high-side gate driver low. Toggle SHDN
or cycle the V CC power supply below 1V to clear the
VROK BLANKING
fault latch and reactivate the controller. UVP is ignored
during output voltage transitions and remains blanked
for an additional 24 clock cycles after the controller
reaches the final DAC code value.
UVP can be disabled through the no-fault test mode
(see the No-Fault Test Mode section).
Thermal-Fault Protection
The MAX8760 features a thermal-fault protection circuit.
When the junction temperature rises above +160°C, a
thermal sensor activates the fault latch and the soft-
shutdown sequence. Once the controller ramps down
to the 0V DAC code setting, it forces the DL_ low-side
gate driver high, and pulls the DH_ high-side gate
driver low. Toggle SHDN or cycle the V CC power supply
below 1V to clear the fault latch and reactivate the con-
troller after the junction temperature cools by 15°C.
Thermal shutdown can be disabled through the
no-fault test mode (see the No-Fault Test Mode section).
No-Fault Test Mode
The latched-fault protection features and overlap mode
can complicate the process of debugging prototype
breadboards since there are (at most) a few milliseconds
in which to determine what went wrong. Therefore, a no-
fault test mode is provided to disable the fault protection
(overvoltage protection, undervoltage protection, and
thermal shutdown) and overlap mode. Additionally, the
test mode clears the fault latch if it has been set. The no-
fault test mode is entered by forcing 12V to 15V on SHDN .
22
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| 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 |
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| MAX8764EEP | 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 |
| MAX8764EEP+ | 功能描述:电流型 PWM 控制器 High-Speed Step Down 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 |
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