【应用】SGMICRO负压芯片SGM660为100G ER4光模块提供负压，实现对EML激光器的控制

时间： 2022-05-20 来源：世强

技术问答

100G QSFP28 ER4光模块的传输距离为40km。目前光模块的主流激光器发光方案为EML（电吸收调制激光器）和DML（直接调制激光器），EML在高速、长途传输应用上具有优势，100G ER4采用EML方案。

EML方案中需要实现对EML激光器的控制。本次客户选EML直流偏置控制器SGM41291加负压芯片 SGM660实现对EML激光器的控制。SGM41291的EAM bias为-0.2~-4.08V，SGM660的输出电压为-0.8~-5.2V，符合需求。

图1 光模块的电源管理模块

可输出负压的BUCK-BOOST电源芯片SGM660的输入电压2.8V~5.5V，符合光模块3.3V供电要求；输出电压-0.8V~5.2V，符合SGM41291的需求；可编程开关电流限制800mA(默认)/ 620mA/450mA(通过SWIRE接口实现数字编程)；小体积封装WLCSP -0.9×1.3-6B，符合光模块小体积要求。

表1 SGM660的主要参数

图2 SGM660的引脚位置

SGM660具有内置软启动、热关机、短路保护、峰值电流限制和欠压锁定（UVLO）功能，无需外部补偿。以上功能满足光模块的高稳定需求。为了使用方便，数字接口控制引脚（SWIRE）允许在数字步骤中编程负输出电压，适应多种需求情况。其外围电路设计简单，符合光模块小体积需求。

图3 SGM660的外围参考电路

综上所述，反相降压/升压转换器SGM660，可配合TEC控制器SGM41291使用，构成EML电源电路。满足了光模块的高稳定，小体积的需求。

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累了 Lv7. 资深专家 2022-05-27

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【应用】可输出负压的国产BUCK-BOOST电源芯片SGM660助力400G光模块，满足小型化需求

目前400G光模块的PCB空间非常紧张，器件选型时优先考虑封装能否放下。圣邦微电子的电源芯片SGM660封装为WLCSP-0.85*1.25，且外围器件只有一个电感和两个电容，电路较简单，适合小型化设计；开关限流点也有450mA/620mA可选，输出电流能力完全满足需要。

应用方案发布时间 : 2021-04-14

【应用】圣邦微同步升压DCDC SGM66099应用于工业场所的温度传感器，静态电流低至0.65μA，效率高达93%

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应用方案发布时间 : 2022-11-30

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在100G ZR4光模块中，使用的是EML激光器，其内部结构包括DFB和EAM，其中EAM需要负压偏置。数明的负压芯片SLM5418EJ-7G可以满足设计需求。

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SGMICRO（圣邦微）信号链和电源管理芯片选型指南

描述- SGMICRO specializes in high-performance and high-quality analog and mixed-signal integrated circuits, and is committed to building a comprehensive portfolio of the highest quality analog and mixed-signal integrated circuits to address all customer needs.

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

选型指南 - SGMICRO - 2024/6/11 PDF 英文下载

SGMICRO DC/DC转换器选型表

SGMICRO DC/DC转换器选型表包含包含同步整流降压转换器、AMOLED显示屏电源降压、非同步降压转换器升压、同步整流升压转换器、非同步升压转换器、电荷泵DC/DC转换器、专用DC/DC转换器和LCM偏置电源；升降压、电荷泵供电，最大输入电压60V，最大开关电流10A，内置MOS。

产品型号	品类	CH	Enable	Vcc (Min)(V)	Vcc (Max)(V)	I_OUT(mA)	Frequency (kHz)	Iq (μA)	SHDN Iq(μA)	Package
SGM6010	DC/DC Synchronous Rectifier Buck Converters	1	L	3	5.5	3000	300 to 2000	0.41	2	TDFN-3×3-10L

选型表 - SGMICRO 立即选型

SGM66075 Low-IQ, High Efficiency 9A Valley Current Synchronous Boost Converter with Bypass Switch

型号- SGM66075-3.6XG/TR,SGM66075-3.6,SGM66075,SGM66075XG/TR

数据手册 - SGMICRO - REV. A - SEPTEMBER 2024 PDF 英文下载

【经验】圣邦微负压输出BUCK-BOOST芯片SGM660设计经验分享

SGM660是圣邦微的一款负压输出BUCK-BOOST芯片，输入电压2.8-5.5V，输出电压-0.8V to -5.2V，0.1V/Step，开关电流和工作频率都是可编程的，内置峰值电流限制、软起动和欠压保护等功能，提供超小封装WLCSP-0.9×1.3-6B。其输出电压、工作频率、限流值、工作模式都是通过SWIRE脚（数字接口）控制，下面介绍在实际设计中如何配置。

设计经验发布时间 : 2023-06-29

圣邦微在光模块中应用的相关产品，涵盖TEC/APD/EML驱动、高性能运放、DCDC等｜视频

比较全面的展示了圣邦微在光模块中应用的相关产品，总的来说目前是有20--30个光模块相关产品。主要涵盖了TEC＼APD＼EML驱动这样的专用器件，高性能运放、电源相关LDO＼DCDC、负压，负载开关以及温度传感器等产品。

新产品发布时间 : 2023-11-17

SGM66024 5.2V Output, 990mA Valley Switch Current, 30μA IQ Synchronous Boost Converter

型号- SGM66024XN6G/TR,SGM66024

数据手册 - SGMICRO - REV. A - MAY 2024 PDF 英文下载

SGMicro（圣邦微） SGM6601低功耗DC-DC升压转换器数据手册

型号- SGM6601,SGM6601YTDI6G/TR,SGM6601YTN5G/TR

数据手册 - SGMICRO - 2012年4月26日 PDF 英文下载

SGM66022 8A Valley Current, 0.5V Ultra-Low Input, Synchronous Boost Converter

型号- SGM66022XTHD7G/TR,SGM66022

数据手册 - SGMICRO - REV.A - APRIL 2024 PDF 英文下载

SGM66099 Synchronous Boost Converter with Ultra-Low Quiescent Current Datasheet

型号- SGM66099-4.5YTDI6G/TR,SGM66099-ADJYTDI6G/TR,SGM66099,SGM66099-ADJ,SGM66099-5.0YG/TR,SGM66099-2.5YTDI6G/TR,SGM66099-3.0YTDI6G/TR,SGM66099-3.3YG/TR,SGM66099-3.3YTDI6G/TR,SGM66099-3.0,SGM66099-3.6YG/TR,SGM66099-5.0YTDI6G/TR,SGM66099-2.5,SGM66099-3.3,SGM66099-5.0,SGM66099-3.6,SGM66099-4.5,SGM66099-4.5YG/TR,SGM66099-3.0YG/TR,SGM66099-3.6YTDI6G/TR,SGM66099-2.5YG/TR,SGM66099-ADJYG/TR

数据手册 - SGMICRO - REV.B. 1 - MAY 2022 PDF 英文下载