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DT4110 -- 1A Linear Charger and 5V2A Boost DC-DC Combo

Issue Date: 2015-08-18
Description:

The DT4110 is a 5V PMU comprised of a linear charger and a step-up DC-DC converter. The charger is able to deliver 1A charging current to a single Li-ion battery. It charges a battery in three phases: trickle charging, constant current, and constant voltage. The charge voltage is fixed at 4.2V/4.35V, and the charge current can be programmed externally with a single resistor. The charger automatically terminates the charge cycle when the charge current drops to 1/10 of the programmed value after the final float voltage is reached, and automatically restarts the charge if the battery voltage falls below an internal threshold. The step-up DC-DC converter can deliver 5V1A output from 2.7V Supply Voltage, or 5V2.1A output from 3.5V. The DT4110 has Soft Start, UVLO and Thermal Shutdown protection functions and charging indictor output.


GENERAL DESCRIPTION

The DT4110 is a 5V PMU comprised of a linear charger and a step-up DC-DC converter.

The charger is able to deliver 1A charging current to a single Li-ion battery. It charges a battery in three phases: trickle charging, constant current, and constant voltage. The charge voltage is fixed at 4.2V/4.35V, and the charge current can be programmed externally with a single resistor. The charger automatically terminates the charge cycle when the charge current drops to 1/10 of the programmed value after the final float voltage is reached, and automatically restarts the charge if the battery voltage falls below an internal threshold.

The step-up DC-DC converter can deliver 5V1A output from 2.7V Supply Voltage, or 5V2.1A output from 3.5V.

The DT4110 has Soft Start, UVLO and Thermal Shutdown protection functions and charging indictor output.

The DT4110 is available in ESOP8 package.

 

FEATURES

  • Charges Single Cell Li-Ion Batteries Directly from USB Port
  • Charge Current Up to 1.2A
  • Charging indicator
  • Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating
  • 4.2V/4.35V Charge Voltage with ±1% tolerance
  • Thermal Shutdown, Soft Start and UVLO
  • Deliver 5V1A output from 2.7V Supply Voltage, or 5V2.1A from 3.5V
  • ESOP8 Package

APPLICATIONS

  • Backpack Power
  • MIDs
  • Other Portable Devices
   

TYPICAL APPLICATION CIRCUIT

PIN ASSIGNMENT

 

PIN DESCRIPTION

 

PIN No

SYMBOL

DESCRIPTTION

1

SW

Step-up DC-DC Switching Output

2

GND

Ground

3

BAT

Battery Charge Output

4

CHRG

Open-Drain Charges Status Output

5

PROG

Charge Current Program, Charge Current Monitor and Shutdown Pin

6

VCC

Charger Power Supply Input

7

VDD

Set-up DC-DC Power Supply Input

8

FB

Step-up DC-DC Feed-Back Input

 

ABSOLUTE MAXIMUM RATINGS (Note 1)

 

SYM

PARAMETER

VALUE

Units

VCC, VDD

Input supply voltage

8

V

VPROG

PROG Voltage

VCC+0.3

V

VSW

SW Voltage

10

V

VIO

Other IO Pins

VCC+0.3

V

DSC

BAT Short-Circuit Duration

Continuous

 

PD

Maximum Power Dissipation

2

W

PTR

Package Thermal Resistance, ESOP8(θJA?/p>

45

oC /W

Tj

Maximum Junction Temperature

125

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Ts

Storage Temperature Range

-65 to 125

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TLead

Lead Temperature, soldering, 10Sec

260

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RECOMMENDED OPERATING RANGE(Note 2)

 

SYMBOL

PARAMETER

VALUE

Units

VCC, VDD

Input supply voltage

2.5 to +7.5

V

Tj

Junction Temperature

-40 to +85

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Note1: Absolute Maximum Ratings are threshold limit values that must not be exceeded even for an instant under any condition. Moreover, such values for any two items must not be reached simultaneously. Operation above these absolute maximum ratings may cause degradation or permanent damage to the device. These are stress ratings only and do not necessarily imply functional operation below these limits.

Note 2:  Recommended operating Range indicates conditions for which the device is functional, but does not guarantee specific performance limits.



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