LTC4156
Info : RECOMMENDED FOR NEW DESIGNS
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LTC4156

Dual-Input Power Manager/3.5A LiFePO4 Battery Charger with I2C Control and USB OTG

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 4
1ku List Price Starting From $3.54
Features
  • High Efficiency Charger Capable of 3.5A Charge Current
  • Charge Control Algorithm Specifically Designed for LiFePO4 Batteries (Lithium Iron Phosphate)
  • Monolithic Switching Regulator Makes Optimal Use of Limited Power and Thermal Budget
  • Dual Input Overvoltage Protection Controller
  • Priority Multiplexing for Multiple Inputs
  • I2C/SMBus Control and Status Feedback
  • NTC Thermistor ADC for Temperature Dependent Charge Algorithms (JEITA)
  • Instant-On Operation with Low Battery
  • Battery Ideal Diode Controller for Power Management
  • USB On-The-Go Power Delivery to the USB Port
  • Four Float Voltage Settings (3.45V, 3.55V, 3.6V, 3.8V)
  • 28-Lead 4mm × 5mm QFN Package
Additional Details
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The LTC4156 is a 15 watt I2C controlled power manager with PowerPath instant-on operation, high efficiency switching battery charging and USB compatibility. The LTC4156 seamlessly manages power distribution from two 5V sources, such as a USB port and a wall adapter, to a single-cell rechargeable lithium iron phosphate battery and a system load.

The LTC4156’s switching battery charger automatically limits its input current for USB compatibility, or may draw up to 3A from a high power wall adapter. The high efficiency step-down switching charger is designed to provide maximum power to the application and reduced heat in high power density applications.

I2C adjustability of input current, charge current, battery float voltage, charge termination, and many other parameters allows maximum flexibility. I2C status reporting of key system and charge parameters facilitates intelligent control decisions. USB On-The-Go support provides 5V power back to the USB port without any additional components. A dual-input, priority multiplexing, overvoltage protection circuit guards the LTC4156 from high voltage damage on the VBUS pin.

The LTC4156 is available in the low profile (0.75mm) 28-lead 4mm × 5mm QFN surface mount package.

Applications

  • Portable Medical Devices
  • Portable Industrial Devices
  • Backup Devices
Part Models 4
1ku List Price Starting From $3.54

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC4156EUFD#PBF
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LTC4156EUFD#TRPBF
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LTC4156IUFD#PBF
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LTC4156IUFD#TRPBF
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Product Lifecycle

PCN

Feb 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC4156EUFD#PBF

PRODUCTION

LTC4156EUFD#TRPBF

PRODUCTION

LTC4156IUFD#PBF

PRODUCTION

LTC4156IUFD#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Feb 20, 2022

- 21_0269

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Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC4156EUFD#PBF

PRODUCTION

LTC4156EUFD#TRPBF

PRODUCTION

LTC4156IUFD#PBF

PRODUCTION

LTC4156IUFD#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC1674A-B

LTC4156EUFD Demo Board | Dual Input Power Mgr/3.5A LiFePO4 Charger, VIN = 4.35V to 5.5V, VOUT = 4.5V @ 3.5A; DC590B Demo Board is required

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DC1674A-B

LTC4156EUFD Demo Board | Dual Input Power Mgr/3.5A LiFePO4 Charger, VIN = 4.35V to 5.5V, VOUT = 4.5V @ 3.5A; DC590B Demo Board is required

LTC4156EUFD Demo Board | Dual Input Power Mgr/3.5A LiFePO4 Charger, VIN = 4.35V to 5.5V, VOUT = 4.5V @ 3.5A; DC590B Demo Board is required

Product Detail

Demonstration Circuit 1674A-B is dual input power manager/3.5A LiFePO4 battery charger with I2C control and USB On-The-Go (OTG) featuring the LTC4156EUFD. Most functions on the LTC4156 are controlled via the I2C serial interface. The LTC4156 also provides extensive status information via the I2C interface. The DC1674A-B's working input voltage range is 4.35V to 5.5V on both the WALL and USB input. The DC1674A-B will tolerate non-operating overvoltage inputs up to 27V. It utilizes the DC590B (USB-to-I2C interface board) to control the LTC4156 and to read back the contents of the command and status registers.

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