SLUSBS9A
February 2014 – July 2014
PRODUCTION DATA.
1
Features
2
Applications
3
Description
4
Simplified Schematic
5
Revision History
6
Device Comparison Table
7
Pin Configuration and Functions
8
Specifications
8.1
Absolute Maximum Ratings
8.2
Handling Ratings
8.3
Recommended Operating Conditions
8.4
Thermal Information
8.5
Electrical Characteristics
8.6
Typical Characteristics
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Dynamic Rectifier Control
9.3.2
Dynamic Power Scaling
9.3.3
VO_REG and VIREG Calculations
9.3.4
RILIM Calculations
9.3.5
Adapter Enable Functionality
9.3.6
Turning Off the Transmitter
9.3.6.1
WPC End Power Transfer (EPT)
9.3.6.2
PMA EOC
9.3.7
CM_ILIM
9.3.8
PD_DET and TMEM
9.3.9
TS, Both WPC and PMA
9.3.10
I2C Communication
9.3.11
Input Overvoltage
9.4
Device Functional Modes
9.5
Register Maps
10
Application and Implementation
10.1
Application Information
10.2
Typical Applications
10.2.1
Dual Mode Design (WPC and PMA Compliant) Power Supply 5-V Output With 1-A Maximum Current
10.2.1.1
Design Requirements
10.2.1.2
Detailed Design Procedure
10.2.1.2.1
Output Voltage Set Point
10.2.1.2.2
Output and Rectifier Capacitors
10.2.1.2.2.1
TMEM
10.2.1.2.3
Maximum Output Current Set Point
10.2.1.2.4
TERM Resistor
10.2.1.2.5
Setting LPRB1 and LPRB2 Resistors
10.2.1.2.6
I2C
10.2.1.2.7
Communication Current Limit
10.2.1.2.8
Receiver Coil
10.2.1.2.9
Series and Parallel Resonant Capacitors
10.2.1.2.10
Communication, Boot and Clamp Capacitors
10.2.1.3
Application Curves
10.2.2
bq51221 Embedded in System Board
10.2.3
bq51221 Implemented in Back Cover
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
13
Device and Documentation Support
13.1
Trademarks
13.2
Electrostatic Discharge Caution
13.3
Glossary
14
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
YFP|42
MXBG339A
Thermal pad, mechanical data (Package|Pins)
Orderable Information
slusbs9a_oa
slusbs9a_pm