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NBM7100

Coin cell battery life booster with adaptive power optimization

The NBM7100A/B is a battery energy management device designed to maximize usable capacity from non-rechargeable, primary batteries when used in low-voltage, low-power applications requiring burst current loads. The devices overcome voltage drop and battery life limitations associated with extracting high pulse currents (Figure 1) from lithium primary batteries such as 3 V lithium manganese dioxide (LiMnO2) coin cells. which are commonly used in wireless, low-power IoT sensor applications.

The NBM7100A/B contains two stages of high efficiency DC-DC conversion and an intelligent learning algorithm. The first stage DC-DC conversion transfers energy from the lithium battery at a low constant current to a capacitive storage element. Once charged, a second DC-DC conversion cycle utilizes this stored energy to supply a regulated voltage with high pulse load current capability on the VDH output pin. The battery is never directly subjected to large load pulse currents, resulting in a longer, more predictable battery lifetime.

The proprietary learning algorithm monitors the energy used during repetitive load pulse cycles and optimizes first stage DC-DC conversion to minimize the residual charge in the storage capacitor.

A serial interface allows a microcontroller to change default configuration settings and read-back system information.

Table 1. Related devices

Type number

Bus interface

Auto

start

Pulse

ILOAD

NBM7100A

I²C

Yes

≥ 200 mA

NBM7100B

SPI

No

≥ 200 mA
Figure 1. IoT pulsed load profile

特性

  • Programmable constant battery load current: 2 mA to 16 mA

  • Protection against battery voltage dips (Brown-out)

  • Pulse output current: > 200 mA

  • Low ripple regulated programmable output voltage, VDH: 1.8 V to 3.6 V

  • Ultra-low standby current: < 50 nA

  • Peak conversion efficiency > 90% with adaptive optimization

  • Integrated fuel gauge

  • Small 16 pin lead-free package (SOT763-1/DHVQFN16; 2.5 mm × 3.5 mm × 0.85 mm)

  • Specified from -40 °C to +85 °C

目标应用

  • Battery powered wireless microcontroller applications (IoT): Bluetooth®, LoRaWAN®, Sigfox™, LTE-M, NB-IoT, Zigbee, etc.

  • Industrial: temperature, occupancy, e-metering, electronic shelf label, asset tracking, irrigation monitoring

  • Consumer/wearable: location tags, heart rate monitor, blood glucose meter, remote controls, key fobs

Figure 1. Simplified Application

参数类型

Type numberProduct statusBus interfaceAuto startStorage cap charge balance functionMax storage cap voltage (V)Pulse ILOAD [max] (mA)Package versionPackage name
NBM7100ABQProductionI²CYesNot Supported11200SOT763-1DHVQFN16
NBM7100BBQProductionSPINoNot Supported11200SOT763-1DHVQFN16

封装

型号封装尺寸版本回流焊/波峰焊包装状态标示可订购的器件编号，（订购码(12NC)）
NBM7100ABQ
DHVQFN16
(SOT763-1) 		SOT763-1SOT763-1_115ActiveM7100ANBM7100ABQX
( 9356 911 95115 )
NBM7100BBQ
DHVQFN16
(SOT763-1) 		SOT763-1SOT763-1_115ActiveM7100BNBM7100BBQX
( 9356 911 96115 )

环境信息

型号可订购的器件编号化学成分RoHSRHF指示符无铅转换日期
NBM7100ABQNBM7100ABQXNBM7100ABQ
NBM7100BBQNBM7100BBQXNBM7100BBQ
品质及可靠性免责声明

文档 (6)

文件名称标题类型日期
NBM7100Coin cell battery life booster with adaptive power optimizationData sheet2023-06-29
nexperia_document_leaflet_battery_life_booster_NBM5100_NBM7100Coin cell battery life boosterLeaflet2023-06-22
DHVQFN16_SOT763-1_mkplastic, dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 0.85 mm bodyMarcom graphics2017-01-28
NBM5100_NBM7100_GUI_bert_v_1_9GUI for NBM5100 NBM7100 evaluation boardSoftware2023-10-27
UM90022NBM5100; NBM7100 Evaluation board moduleUser manual2023-07-11
SOT763-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 1 mm bodyPackage information2023-05-11

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