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BQ21062 I2C Controlled 1-Cell 500-mA Linear Battery Charger with Power Path, Load Switch, 10-nA Ship Mode, and Regulated System (PMID) Voltage
SLUSE42A
july 2020 – april 2023
BQ21062
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BQ21062 I2C Controlled 1-Cell 500-mA Linear Battery Charger with Power Path, Load Switch, 10-nA Ship Mode, and Regulated System (PMID) Voltage
1
Features
2
Applications
3
Description
4
Revision History
5
Description (continued)
6
Device Comparison Table
7
Pin Configuration and Functions
8
Specifications
8.1
Absolute Maximum Ratings
8.2
ESD Ratings
8.3
Recommended Operating Conditions
8.4
Thermal Information
8.5
Electrical Characteristics
8.6
Timing Requirements
8.7
Typical Characteristics
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Linear Charger and Power Path
9.3.1.1
Battery Charging Process
9.3.1.2
JEITA and Battery Temperature Dependent Charging
9.3.1.3
Input Voltage Based Dynamic Power Management (VINDPM)
9.3.1.4
Battery Supplement Mode
9.3.2
Protection Mechanisms
9.3.2.1
Input Over-Voltage Protection
9.3.2.2
Safety Timer and I2C Watchdog Timer
9.3.2.3
Thermal Protection and Thermal Charge Current Foldback
9.3.2.4
Battery Short and Over Current Protection
9.3.2.5
PMID Short Circuit
9.3.3
VDD LDO
9.3.4
Load Switch/LDO Output and Control
9.3.5
PMID Power Control
9.3.6
System Voltage (PMID) Regulation
9.3.7
MR Wake and Reset Input
9.3.7.1
MR Wake or Short Button Press Functions
9.3.7.2
MR Reset or Long Button Press Functions
9.3.8
14-Second Watchdog for HW Reset
9.3.9
Faults Conditions and Interrupts ( INT)
9.3.9.1
Flags and Fault Condition Response
9.3.10
Power Good ( PG) Pin
9.3.11
External NTC Monitoring (TS)
9.3.11.1
TS Thresholds
9.3.12
I2C Interface
9.3.12.1
F/S Mode Protocol
9.4
Device Functional Modes
9.4.1
Ship Mode
9.4.2
Low Power
9.4.3
Active Battery
9.4.4
Charger/Adapter Mode
9.4.5
Power-Up/Down Sequencing
9.5
Register Map
9.5.1
I2C Registers
10
Application and Implementation
10.1
Application Information
10.2
Typical Application
10.2.1
Design Requirements
10.2.2
Detailed Design Procedure
10.2.2.1
Input (IN/PMID) Capacitors
10.2.2.2
VDD, LDO Input and Output Capacitors
10.2.2.3
TS
10.2.2.4
Recommended Passive Components
10.2.3
Application Curves
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
13
Device and Documentation Support
13.1
Device Support
13.1.1
Third-Party Products Disclaimer
13.2
Documentation Support
13.2.1
Related Documentation
13.3
Receiving Notification of Documentation Updates
13.4
Support Resources
13.5
Trademarks
13.6
Electrostatic Discharge Caution
13.7
Glossary
14
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
YFP|20
MXBG090K
Thermal pad, mechanical data (Package|Pins)
Orderable Information
sluse42a_oa
sluse42a_pm
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DATA SHEET
BQ21062 I2C Controlled 1-Cell 500-mA Linear Battery Charger with Power Path, Load Switch, 10-nA Ship Mode, and Regulated System (PMID) Voltage
1
Features
Linear battery charger with 1.25-mA to 500-mA fast charge current range
0.5% Accurate I
2
C programmable battery regulation voltage ranging from 3.6 V to 4.6 V in 10-mV steps
Configurable termination current supporting down to 0.5 mA
20-V Tolerant input with typical 3.4-V to 5.5-V input voltage operating range
Programmable thermal charging profile, fully configurable hot, warm, cool and cold thresholds
Power Path management for powering system and charging battery
I
2
C Programmable regulated system voltage (PMID) ranging from 4.4V to 4.9V in addition to battery voltage tracking and Input pass-though options
Dynamic power path management optimizes charging from weak adapters
Advanced I
2
C control allows host to disconnect the battery or adapter as needed
I
2
C Configurable load switch or up to 150-mA LDO output
Programmable range from 0.6 V to 3.7 V in 100-mV steps
Ultra low Iddq for extended battery life
10-nA Ship mode battery Iq
400-nA Iq While powering the system (PMID and VDD on)
One push-button wake-up and reset input with adjustable timers
Supports system power cycle and HW reset
20-Pin 2-mm x 1.6-mm CSP package
11-mm
2
Total solution size
2
Applications
Headsets, earbuds and hearing aids
Smart watches and smart trackers
Wearable fitness and activity monitors
Blood glucose monitors
