MAX1932

数控、0.5%精度、更安全的APD偏置电源


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说明

MAX1932为光学接受器中的雪崩光电二极管(APD)产生一个低噪声、高电压输出。通过一个恒定频率的、脉宽调制(PWM) boost拓扑及一个独特的结构――该结构在反馈回路中加入可选择的RC或者LC后滤波器仍可保持稳定调压,得以达到非常低的输出纹波和噪声。一个精确的参考和误差放大器可以保持0.5%输出电压准确度。

MAX1932可以保护贵重的APD,抵制不利的工作条件,同时提供最优的偏压。传统的boost转换器通过测量开关电流来进行保护,而MAX1932集成了精确的高端限流特性来保护雪崩条件下的APD。一个限流标志位指示精确的雪崩击穿点以方便APD工作点的校准。MAX1932控制方式防止输出过冲和欠冲,可使APD安全工作而不发生数据丢失。

输出电压可以通过外部电阻器、内部8位DAC、外部DAC或者其他电压源来进行精确的调节。输出范围和偏移都是可通过外部电阻器独立调节的。这可在要求一个受限制电压范围的应用中充分利用DAC的分辨率,如输出4.5V至15V、4.5V至45V、20V至60V或40V至90V。
MAX1932:典型应用电路 MAX1932:典型应用电路 放大+

关键特性

  • 独特的结构提供优异的精度,提高系统性能
    • 0.5%输出电压精度
    • 低输出电压纹波(<1mV)
  • 保护功能保证安全工作
    • 高精度高边限流
    • 雪崩指示标记
  • 提供灵活的输出电压,适合多种应用和设计
    • 4.5V至90V输出电压范围
    • 可使用8位SPI兼容内部DAC、外部DAC或外部电阻设置输出电压
  • 较小的电路占位面积降低设备尺寸
    • 12引脚、4mm x 4mm QFN封装
    • 电路高度<2mm
  • 通用的2.7V至5.5V输入电压范围

应用

  • 光纤光网络设备
  • 激光距离探测器
  • 光接收器及模块
  • PIN二极管偏置电源
  • 电信设备
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
IOUT1
(A)
Output Adjust. MethodSwitch TypeICC
(mA)
Shutdown Mode Supply Current
(µA)
Shutdown Mode Supply Current
(µA)
DC-DC OutputsOper. Freq.
(kHz)
Package/PinsBudgetary
Price
minmaxminmaxtyptypmaxSee Notes
MAX1932 2.75.54.5900.01
Digital
Resistor
Voltage
External0.525651300
TQFN/12
$5.25 @1k
查看所有Step-Up Switching Regulators (98)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX1932EVKIT: MAX1932评估板

CAD Symbols and Footprints

  • MAX1932ETC
  • MAX1932ETC+
  • MAX1932ETC+T
  • MAX1932ETC-T
  • MAX1932ETC/GG8
  • MAX1932ETC/GG8-T
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    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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    参考电路3926HFRD-22.3: GPON (MOGPON) ONT模块
    评估板3690MAX1932EVKIT MAX1932评估板