TPS65820EVM

User's Guide SLVU154B – March 2006 – Revised October 2013 TPS658xxEVM Integrated Single-Cell, Lithium-Ion Battery- and Power-Management IC With I2C, LED Drives, Two Synchronous Buck, Boost, and Multiple LDOs This user’s guide is an easy-to-use document that describes the equipment, hardware, software, setup, and a step-by-step procedure to evaluate the features of the TPS65800/810/820/825. The power IC is designed to handle 2 A of input current from the adaptor and up to a 3.5-A discharge from the battery. The charger algorithm is designed to charge a single-cell, Li-ion or Li-polymer battery. The buck, boost, and LDO supplies typically run off of the OUT (system) pin which is available on the IC and is powered from the AC, USB, or battery. 1 2 3 4 5 6 Contents TPS65800/810/820/825 Charger and Power-Management Evaluation Module .................................... 2 Test Summary ............................................................................................................... 4 Getting Started With Evaluation ........................................................................................... 7 Software Feature Description ............................................................................................. 7 Interrupts Software LEDs ................................................................................................. 17 Physical Layouts ........................................................................................................... 18 List of Figures 1 TPS65810EVM Assembly (Similar to Other Versions) ................................................................ 5 2 Equipment and EVM Setup ................................................................................................ 6 3 Charger Section ............................................................................................................. 8 4 Buck and Boost Converters Section .................................................................................... 10 5 LDO Section ................................................................................................................ 11 6 Analog to Digital Converter Section ..................................................................................... 12 7 PWM Drivers and RGB Drivers Section ................................................................................ 14 8 Register Map Section ..................................................................................................... 15 9 GPIO and Mask Control Section ........................................................................................ 16 10 Board Layout Top Layer .................................................................................................. 18 11 Board Layout Layer 2 ..................................................................................................... 18 12 Board Layout Layer 3 ..................................................................................................... 19 13 Board Layout Bottom Layer ............................................................................................. Board Layout Top Assembly Layer ..................................................................................... TPS65800/810EVM Schematic .......................................................................................... 19 14 15 20 27 List of Tables 1 TPS65800/810/820/825 Outputs and Operational Range ............................................................ 3 2 Performance Specification Summary..................................................................................... 4 3 HPA129A BOM – TPS65800/810 ....................................................................................... 21 4 HPA184A BOM – TPS65820/825 ....................................................................................... 24 Windows is a registered trademark of Texas Instruments. SLVU154B – March 2006 – Revised October 2013 Submit Documentation Feedback TPS658xxEVM Integrated Single-Cell, Lithium-Ion Battery- and PowerManagement IC With I2C, LED Drives, Two Synchronous Buck, Boost, and Copyright © 2006–2013, Texas Instruments Incorporated Multiple LDOs 1 TPS65800/810/820/825 Charger and Power-Management Evaluation Module 1 TPS65800/810/820/825 Charger and Power-Management Evaluation Module 1.1 Background www.ti.com The TPS65800/810/820/825 is designed to provide, in a single monolithic IC, flexible charge and system power-path management for a USB-port and AC-adapter supply; as well as multiple power supply outputs, and a number of value-added circuit options to supply an integrated solution for applications powered by one Li-ion or Li-polymer cell, and requiring multiple voltage rails. The TPS65800/810/820/825 features two highly efficient, step-down converters targeted at providing the core voltage, and peripheral I/O rails in a processor-based system. Both converters enter a low-power mode at light load for maximum efficiency across the widest possible range of load currents. The TPS65800/810/820/825 also integrates a boosttype LED driver, six LDO regulators (five programmable and one fixed), one programmable SIM interface LDO, and an integrated backup block for a battery/rechargeable capacitor. The TPS65800/810/820/825 powers the system while independently charging the battery. This feature reduces the charge and discharge cycles on the battery and allows for proper charge termination and system operation with an absent or defective battery pack. The system can instantaneously turn on using an external power source in the case of a deeply discharged battery pack. The TPS65800/810/820/825 automatically selects the USB port or the AC adapter as the power source for the system. In the USB configuration, the host can select from the two preset charge rates of 100 mA and 500 mA. The TPS65800/810/820/825 dynamically adjusts the USB charge rate based on system load to stay within the 100-mA or 500-mA charge rates. In the AC-adapter configuration, an external resistor sets the magnitude of the charge current. The TPS65800/810/820/825 charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated based on minimum current. An internal charge timer provides a backup safety for charge termination. The TPS65800/810/820/825 automatically re-starts the charge if the battery voltage falls below an internal threshold. The TPS65800/810/820/825 also features an 8-channel (2 external), 10-bit, successive-approximation A/D converter with external trigger capabilities performing single, multiple, and continuous readings; and, returning maximum, minimum, or continuous average values. It also has three programmable generalpurpose input output (GPIO) ports . GPIO3 is programmed by default as a trigger for the A/D converter. Two general-purpose PWM drivers and an RGB driver, with programmable current, are also included to provide a highly integrated solution suitable for hand-held and other portable applications. The TPS65810 is similar to the TPS65800, but has a few changes as follows: 1. The switcher and LDO outputs may have different default values and may be enabled or disabled differently. See Table 1 for differences. 2. The USB boot up is disabled, and ISET2 defaults to high (500-mA current limit level). 3. The charger defaults to off. 4. The TS current bias is turned off, so external biasing is required to create a battery temperature feedback voltage. 5. I2C and read state of GPIO1/2/3. 6. Hot Reset reloads register defaults values and internal pullup resistor on HOT_RESET removed (external resistor is on EVM). 7. I2C machine reads interrupt fix. 8. SM1/2 default enable control changed from GPIO1 and I2C to GPIO1 or I2C. The TPS65820 is based on the TPS65800 with a few changes. See the application report SLVA248 for the differences among the TPS65800/810/820. The most noticeable difference is on power up, the CE bit is set for battery-only operation. To operate off the AC adapter input, the AC, USB, or the 2.75-A maximium option has to be selected. 2 TPS658xxEVM Integrated Single-Cell, Lithium-Ion Battery- and PowerSLVU154B – March 2006 – Revised October 2013 Management IC With I2C, LED Drives, Two Synchronous Buck, Boost, and Submit Documentation Feedback Copyright © 2006–2013, Texas Instruments Incorporated Multiple LDOs TPS65800/810/820/825 Charger and Power-Management Evaluation Module www.ti.com Table 1. TPS65800/810/820/825 Outputs and Operational Range (1) Supply Pin Type VOUT (V) TPS65800/810/820/825 TPS65810 VOUT (V) Default EN/DISabled VOUT (V) Default EN/DISabled IO MAX (mA) Acc % Steps Eff % SM1 44 Buck converter 0.6–1.8 1.24 Enabled 1.24 Enabled 600 3 32 90 SM2 49 Buck converter 1.0–3.4 1.8 Enabled 3.32 Enabled 600 3 32 90 SM3 42 Boost output 5–25 Current driven Disabled Current driven Disabled 25 10 256 80 SIM 5 General-purpose LDO 1.8 or 3.0 1.8 (2) Disabled 2.5 Enabled 8 5 2 – LDO_PM 10 General-purpose LDO (only active if AC or USB present) 3.3 3.3 Enabled 3.3 Enabled 20 5 Fixed – LDO0 32 General-purpose LDO disabled by default 3.3 3.3 Disabled 3.3 Disabled 150 3 Fixed – LDO1 37 General-purpose LDO 1.25–3.3 2.85 Enabled 1.25 Disabled 150 3 8 – LDO2 33 General-purpose LDO 1.25–3.3 3.3 Enabled 3.3 Disabled 150 3 8 – (3) LDO3 28 High PSRR LDO 1.224–4.4 1.25 Enabled 1.5 Disabled 100 3 128 – LDO4 27 High PSRR LDO 1.224–4.4 2.8 Enabled 1.8 Disabled 100 3 128 – LDO5 26 High PSRR LDO 1.224–4.4 2.75 Enabled 3.1 Enabled 100 3 128 – RTC_OUT 4 Linear regulator and charger 3.1 3.1 (4) Enabled 1.5 Enabled 8 5 Fixed – PWM 34 PWM (adjustable frequency and duty cycle) (1) (2) (3) (4) 150 mA All output can be controlled and programmed by an I2C-compatible interface. Temperature range is –40°C to 85°C. TPS65825 SIM has two selections, 1.8 and 2.8 VDC. The IC defaults to 2.8 VDC. TPS65825 LDO3 defaults to 1.5 VDC. TPS65820/825 RTC_OUT defaults to 2.6 VDC but 3.1 VDC can be selected. SLVU154B – March 2006 – Revised October 2013 Submit Documentation Feedback TPS658xxEVM Integrated Single-Cell, Lithium-Ion Battery- and PowerManagement IC With I2C, LED Drives, Two Synchronous Buck, Boost, and Multiple LDOs Copyright © 2006–2013, Texas Instruments Incorporated 3 Test Summary 1.2 www.ti.com Performance Specification Summary This section summarizes the performance specifications of the EVM.Table 2 gives the performance specifications of the EVM. Table 2. Performance Specification Summary Specification Test Conditions Input DC Voltage, VI(DC) Min Typ Max Units VREG +0.5 5.0 6 (1) Volts (1) Amps 5 Watts Battery Charge Current, IO(CHG) Power Dissipation (1) 2 1.5 Pin-Pout The AC and USB FETs are rated for 18 VDC (all other pens are