TPS65217CRSL

Características：

FEATURES

234CHARGER/POWER PATH

• 2-A Output Current on Power Path

• Linear Charger; 700-mA Maximum Charge Current

• 20-V Tolerant USB and AC Inputs

• 100-mA, 500-mA, 1300-mA or 1800-mA Current

Limit on USB Input

• Thermal Regulation, Safety Timers

• Temperature Sense Input STEP-DOWN CONVERTER (DCDC1, 2, 3)

• Three Step-Down Converter With Integrated

Switching FETs

– DCDC1: 0.9 V – 1.8 V at 1.2 A – DCDC2: 0.9 V – 3.3 V at 1.2 A – DCDC3: 0.9 V – 1.5 V at 1.2 A • VIN Range: 2.7 V – 5.8 V • 2.25-MHz Fixed Frequency Operation

• Power Save Mode at Light Load Current

• Output Voltage Accuracy in PWM Mode ±2.0%

• 100% Duty Cycle for Lowest Dropout

• Typical 15-µA Quiescent per Converter

• Passive Discharge to Ground When Disabled

LDOs (LDO1, 2)

• Two Adjustable LDOs

– LDO1: 1.0 V – 3.3 V (1.8-V Default) at 100 mA

– LDO2: 0.9V – 3.3 V (3.3-V Default) at 100 mA

• VIN Range: 1.8 V – 5.8 V • LDO2 Can Be Configured to Track DCDC3

• Typical 15-µA Quiescent Current

LOAD SWITCHES (LDO3, 4)

• Two Independent Load Switches That Can Be Configured as LDOs

• Configured as Switches:

– VIN Range: 1.8 V – 5.8 V

– Switch Impedance 300 mΩ (Typical)

– 200-mA Current Limit

– Passive Discharge to Ground When Disabled

• Configured as LDOs:

– LDO Output Voltage Range: 1.5 V – 3.3 V – VIN Range: 2.7 V – 5.8 V – 200-mA Current Limit (TPS65217A, B)

– 400-mA Current Limit (TPS65217C)

– Passive Discharge to Ground When Disabled

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

• Internal Low-Side Current Sinks

PROTECTION

• Undervoltage Lockout and Battery Fault Comparator

• Always-On Push-Button Monitor

• Hardware Reset Pin

• Password Protected I2C® Registers

INTERFACE

• I2C Interface (Address 0x24)

• Password Protected I2C Registers 

PACKAGE

• Available in 6-mm × 6-mm, 48-Pin QFN

Application 

• AM335x ARM® Cortex™-A8 Microprocessors

• Portable Navigation Systems

• Tablet Computing

• 5-V Industrial Equipment

GENERAL DESCRIPTION

The TPS65217 is a single chip power management IC specifically designed to support the AM335x series of application processors in portable and 5-V, non-portable applications. It provides a linear battery charger for single-cell Li-ion and Li-Polymer batteries, dual-input power path, three step-down converters, four LDOs, and a high-efficiency boost converter to power two strings of up to 10 LEDs each. The system can be supplied by any combination of USB port, 5-V AC adaptor, or Li-Ion battery. The device is characterized across a -40°C to +105°C temperature range which makes it suitable for industrial applications. Three high-efficiency 2.25-MHz step-down converters are targeted at providing the core voltage, memory, and I/O voltage for a processor based system.

They enter a low power mode at light load for maximum efficiency across the widest possible range of load currents. For low-noise applications the devices can be forced into fixed frequency PWM using the I2C interface. The step-down converters allow the use of small inductors and capacitors to achieve a small solution size.

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