MAX17007B

双通道、可组合的QPWM图形核控制器,用于笔记本电脑

双通道开关模式电源,可组合工作在2相单输出模式下


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说明

MAX17007A/MAX17007B/MAX17008是双通道Quick-PWM™降压控制器,为电池供电系统提供通用电源。双通道开关电源(SMPS)还可组合工作在两相单输出模式。固定导通时间Quick-PWM模式提供快速负载瞬态响应,轻松实现宽输入/输出(I/O)电压比条件下的稳压,同时保持相对固定的开关频率。通过外部电阻可以调节开关频率,调节范围200kHz至600kHz。差分输出电流检测架构允许利用检流电阻实现高精度限流,或利用电感的等效直流电阻(DCR)实现低功耗无损检测,可保持0.7%的输出精度。过压(仅MAX17007A/MAX17007B)、欠压保护以及精确的用户可选限流(15mV、30mV、45mV和60mV)确保系统可靠工作。

SMPS输出可工作在跳频模式或超声模式,以提高轻载效率。跳脉冲模式下保持25kHz的最小开关频率,而超声模式下能够消除可闻噪声。

通过改变REFIN1引脚的电压动态调节SMPS1的输出电压。该器件包括0.5%精度的基准,用于设置REFIN1电压。外部5V偏置电源为内部电路及其栅极驱动器供电。

独立的通/断控制具有经过调理的逻辑门限,电源就绪漏极开路输出可提供灵活的系统配置。为了抑制启动时的浪涌电流,SMPS1的CSL1内部电压以1.3mV/µs的斜率从零缓慢上升至最终电压,SMPS2的FB2内部电压则以0.65mV/µs的斜率从零缓慢上升至最终电压。为了避免在断电时输出振铃使电压达到地电位以下,内部电压以各自相同的斜率从稳压值缓慢跌落至零。内部集成自举开关,无需外部自举二极管。

MAX17007A/MAX17007B/MAX17008采用节省空间的28引脚、4mm x 4mm TQFN封装,底部带裸焊盘。与MAX17007A相比,MAX17007B改善了串扰特性。
MAX17007A、MAX17008:功能框图 MAX17007A、MAX17008:功能框图 放大+

关键特性

  • 具有快速瞬态响应的双通道Quick-PWM
  • REFIN1自动动态检测和PGOOD1/故障屏蔽
  • 固定和可调输出电压
    • 在整个电源电压和负载变化范围内,输出精度保持在±0.7%
    • OUT1:0至2V动态输出或预设为1.05V
    • OUT2:0.7V至2V或预设为1.5V
  • 电阻可编程开关频率
  • 集成BST开关
  • 差分电流检测输入
    • 低成本DCR检测或高精度检流电阻检测
    • 内部电流检测补偿
  • 可组合的工作模式支持大电流动态输出
  • 可选择强制PWM、跳脉冲或超声工作模式
  • 最大额定输入电压26V
  • 独立的使能输入
  • 独立的电源就绪输出
  • 过压保护(仅MAX17007A/MAX17007B)
  • 欠压/热保护
  • 软启动和软关断

应用

  • 2节至4节Li+电池供电设备
  • GPU核电源
  • 低功耗I/O电源
  • 笔记本电脑

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX17007AEVKIT: MAX17007A评估板
MAX17039EVKIT: MAX17000、MAX17007A和MAX17039评估板
申请可靠性报告: MAX17007B 
型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C   Material Composition  

备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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