Overview
The TPS65217DRSLR is a single-chip power management IC (PMIC) designed by Texas Instruments. It is specifically tailored to power the AM335x ARM® Cortex®-A8 processor in portable and 5-V line-powered applications. This PMIC integrates a linear battery charger for single-cell Li-ion and Li-polymer batteries, a dual-input power path, three high-efficiency step-down converters, four low-dropout (LDO) regulators, and a high-efficiency boost converter to power up to 20 LEDs. The system can be powered by any combination of a USB port, a 5-V AC adapter, or a Li-Ion battery. The device operates across a temperature range of –40°C to +105°C, making it suitable for industrial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | VQFN (48-pin) | - |
| Package Size | 6.00 mm × 6.00 mm | - |
| Operating Temperature Range | –40°C to +105°C | °C |
| Power Path Output Current | 2 A | A |
| Linear Charger Maximum Charge Current | 700 mA | mA |
| USB and AC Input Tolerance | 20 V | V |
| Step-Down Converter Frequency | 2.25 MHz | MHz |
| Step-Down Converter Output Current | 0 to 1.2 A | A |
| LDO Regulator Output Current | 0 to 100 mA (LDO1, LDO2) | mA |
| Load Switch Output Current | 0 to 200/400 mA (depending on variant) | mA |
| WLED Driver Current per LED String | 25 mA | mA |
Key Features
- Charger and Power Path: 2-A output current on power path, linear charger with 700-mA maximum charge current, 20-V tolerant USB and AC inputs, thermal regulation, safety timers, and temperature sense input.
- Step-Down Converters: Three step-down converters with integrated switching FETs, 2.25-MHz fixed frequency operation, power-save mode at light-load current, output voltage accuracy in PWM mode ±2%, 100% duty cycle for lowest dropout, and typical 15-µA quiescent current per converter.
- LDO Regulators: Two adjustable LDOs, LDO2 can be configured to track DCDC3, and typical 15-µA quiescent current.
- Load Switches: Two independent load switches that can be configured as LDOs.
- WLED Driver: Internally generated PWM for dimming control, 38-V open-LED protection, supports two strings of up to 10 LEDs at 25 mA each, and internal low-side current sinks.
- Protection Features: Undervoltage lockout, battery fault comparator, always-on push-button monitor, hardware reset pin, and password-protected I2C registers.
- Interface: I2C interface with address 0x24 and password-protected I2C registers.
Applications
- Sitara™ AM335x Processor Power
- Portable Navigation Systems
- Tablet Computing
- 5-V Industrial Equipment
Q & A
- What is the primary function of the TPS65217DRSLR?
The TPS65217DRSLR is a single-chip power management IC (PMIC) designed to manage power for systems using the AM335x ARM® Cortex®-A8 processor.
- What types of batteries does the TPS65217DRSLR support?
The TPS65217DRSLR supports single-cell Li-ion and Li-polymer batteries.
- What is the maximum charge current of the linear charger?
The maximum charge current of the linear charger is 700 mA.
- How many step-down converters does the TPS65217DRSLR have?
The TPS65217DRSLR has three step-down converters.
- What is the frequency of the step-down converters?
The step-down converters operate at a fixed frequency of 2.25 MHz.
- What is the output current range of the step-down converters?
The output current range of the step-down converters is 0 to 1.2 A.
- How many LDO regulators does the TPS65217DRSLR have?
The TPS65217DRSLR has four LDO regulators, with two being adjustable.
- What is the maximum current per LED string supported by the WLED driver?
The WLED driver supports up to 25 mA per LED string.
- What protection features does the TPS65217DRSLR include?
The TPS65217DRSLR includes undervoltage lockout, battery fault comparator, always-on push-button monitor, hardware reset pin, and password-protected I2C registers.
- What interface does the TPS65217DRSLR use for communication?
The TPS65217DRSLR uses an I2C interface with address 0x24.
