1 Product Sample & Technical Tools & Support &. Folder Buy Documents Software Community bq27220 . SLUSCB7A MARCH 2016 REVISED APRIL 2016. bq27220 Single-Cell cedv fuel Gauge 1 Features 3 Description 1 Single-Cell Li-Ion Battery fuel Gauge The Texas Instruments bq27220 battery fuel Gauge is a Single-Cell Gauge that requires minimal user- Resides in Pack or on System Board configuration and system microcontroller firmware Supports Embedded or Removable Batteries development, leading to quick system bring-up. The Powers Directly from Battery with Integrated bq27220 device uses the Compensated End-of- LDO Discharge Voltage ( cedv ) algorithm for fuel gauging, and provides information such as remaining battery Supports a Low-Value (10-m ) External Sense capacity (mAh), state-of-charge (%), runtime-to-empty Resistor (min), battery voltage (mV), temperature ( C), and Ultra-Low Power Consumption in NORMAL state-of-health (%).
2 (50 A) and SLEEP (9 A) Modes The bq27220 battery fuel Gauge has ultra-low power Battery fuel Gauging Based on Compensated consumption in NORMAL (50 A) and SLEEP (9 A). End-of-Discharge Voltage ( cedv ) Technology modes, leading to longer battery runtime. Reports Remaining Capacity and State-of- Configurable interrupts help save system power and Charge (SOC) with Smoothing Filter free up the host from continuous polling. Accurate temperature sensing is supported via an external Adjusts Automatically for Battery Aging, Self- thermistor. Discharge, Temperature, and Rate Changes Customers can use preloaded cedv parameters in Provides Battery State-of-Health (Aging).
3 ROM or can generate custom chemistry parameters Estimation using TI's web-based tool, GAUGEPARCAL. Custom- Microcontroller Peripheral Supports: generated parameters can be either programmed in 400-kHz I2C Serial Interface the device RAM by the host on power up of the system or customers can program the parameters to Configurable SOC Interrupt OR. an onboard One-Time Programmable (OTP) memory. Battery Low Digital Output Warning Internal Temperature Sensor OR Battery fuel gauging with the bq27220 device requires Host-Reported Temperature OR connections only to PACK+ (P+) and PACK (P ) for a removable battery pack or embedded battery External Thermistor circuit.
4 The tiny, 9-ball, mm mm, pitch NanoFree chip scale package (DSBGA) is 2 Applications ideal for space-constrained applications. Smartphones and Feature Phones Device Information(1). Tablets PART NUMBER PACKAGE BODY SIZE (NOM). Wearables bq27220 YZF (9) mm mm Building Automation (1) For all available packages, see the orderable addendum at Portable Medical/Industrial Handsets the end of the data sheet. Portable Audio Gaming Simplified Schematic (System-Side). SCL SRN VSYS. I 2C Coulomb Bus SDA. Counter SRP. CPU Battery Pack GPOUT. BAT PACKP. ADC. Li-Ion BIN T Cell Protection VDD IC.
5 V F 1 F. LDO PACKN. VSS NFET NFET. 1. An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. bq27220 . SLUSCB7A MARCH 2016 REVISED APRIL 2016 Table of Contents 1 Features .. 1 Typical Characteristics .. 8. 2 Applications .. 1 7 Detailed Description .. 9. 3 Description .. 1 Overview .. 9. 4 Revision 2 Functional Block Diagram (System-Side Configuration).. 9. 5 Pin Configuration and Functions .. 3. Feature 9. 6 4 Device Functional 11.
6 Absolute Maximum Ratings .. 4. 8 Application and Implementation .. 12. ESD 4. Application 12. Recommended Operating 5. Typical Applications .. 12. Thermal Information .. 5. 9 Power Supply Recommendation .. 15. Supply Current .. 5. Power Supply Decoupling .. 15. Digital Input and Output DC Characteristics .. 5. LDO Regulator, Wake-up, and Auto-Shutdown DC. 10 15. Characteristics .. 6 Layout Guidelines .. 15. LDO Regulator, Wake-up, and Auto-shutdown AC Layout Example .. 16. Characteristics .. 6 11 Device and Documentation Support .. 17. ADC (Temperature and Cell Measurement) Documentation Support.
7 17. Characteristics .. 6 Community 17. Integrating ADC (Coulomb Counter) Characteristics Trademarks .. 17.. 6. Electrostatic Discharge Caution .. 17. I2C-Compatible Interface Communication Timing Characteristics .. 7 Glossary .. 17. SHUTDOWN and WAKE-UP Timing .. 8 12 Mechanical, Packaging, and Orderable Information .. 17. 4 Revision History DATE REVISION NOTES. April 2016 A PRODUCT PREVIEW to Production Data 2 Submit Documentation Feedback Copyright 2016, Texas Instruments Incorporated Product Folder Links: bq27220 . bq27220 . SLUSCB7A MARCH 2016 REVISED APRIL 2016. 5 Pin Configuration and Functions Top View 3 2 1.
8 C. B. A. Bottom View 1 2 3. C. B. A. Pin Functions PIN. TYPE DESCRIPTION. NAME NUMBER. LDO regulator input and battery voltage measurement input. Kelvin sense connect to the positive BAT C3 PI, AI (1) battery terminal (PACKP). Connect a capacitor (1 F) between BAT and VSS. Place the capacitor close to the Gauge . Battery insertion detection input. If OpConfig [BI_PU_EN] = 1 (default), a logic low on the pin is detected as battery insertion. For a removable pack, the BIN pin can be connected to VSS. through a pulldown resistor on the pack, typically the 10-k thermistor; the system board should use a pullup resistor to VDD to ensure the BIN pin is high when a battery is removed.
9 If the battery is embedded in the system or in the pack, it is recommended to leave [BI_PU_EN] =. 1 and use a 10-k pulldown resistor from BIN to VSS. If [BI_PU_EN] = 0, then the host must BIN B1 DI. inform the Gauge of battery insertion and removal with the BAT_INSERT and BAT_REMOVE. subcommands. A 10-k pulldown resistor should be placed between BIN and VSS, even if this pin is unused. NOTE: The BIN pin must not be shorted directly to VCC or VSS and any pullup resistor on the BIN. pin must be connected only to VDD and not an external voltage rail. If an external thermistor is used for temperature input, the thermistor should be connected between this pin and VSS.
10 (1) IO = Digital input-output, AI = Analog input, P = Power connection Copyright 2016, Texas Instruments Incorporated Submit Documentation Feedback 3. Product Folder Links: bq27220 . bq27220 . SLUSCB7A MARCH 2016 REVISED APRIL 2016 Pin Functions (continued). PIN. TYPE DESCRIPTION. NAME NUMBER. This open-drain output can be configured to indicate BAT_LOW when the OpConfig [BATLOWEN] bit is set. By default [BATLOWEN] is cleared and this pin performs an interrupt function (SOC_INT) by pulsing for specific events, such as a change in state-of-charge. Signal polarity for these functions is controlled by the [GPIOPOL] configuration bit.