LTC4075EDD Linear Technology, LTC4075EDD Datasheet

IC CHARG BATT LI-ON USB 10DFN

LTC4075EDD

Manufacturer Part Number
LTC4075EDD
Description
IC CHARG BATT LI-ON USB 10DFN
Manufacturer
Linear Technology
Datasheet

Specifications of LTC4075EDD

Function
Charge Management
Battery Type
Lithium-Ion (Li-Ion)
Voltage - Supply
4.3 V ~ 8 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
10-WFDFN Exposed Pad
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC4075EDD
Manufacturer:
LT
Quantity:
10 000
Part Number:
LTC4075EDD#PBF
Manufacturer:
LT
Quantity:
2 540
Part Number:
LTC4075EDD#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LTC4075EDD#TRPBF
Manufacturer:
TI
Quantity:
1 200
APPLICATIO S
FEATURES
TYPICAL APPLICATIO
ADAPTER
Charges Single-Cell Li-Ion Batteries from Wall
Adapter and USB Inputs
Automatic Input Power Detection and Selection
Charge Current Programmable up to 950mA from
Wall Adapter Input
No External MOSFET, Sense Resistor or Blocking
Diode Needed
Thermal Regulation Maximizes Charging Rate
Without Risk of Overheating*
Preset Charge Voltage with ±0.6% Accuracy
Programmable Charge Current Termination
18µA USB Suspend Current in Shutdown
Independent “Power Present” Status Outputs
Charge Status Output
Automatic Recharge
Available Without Trickle Charge (LTC4075X)
Available in a Thermally Enhanced, Low Profi le
(0.75mm) 10-Lead (3mm × 3mm) DFN Package
Cellular Telephones
Handheld Computers
Portable MP3 Players
Digital Cameras
WALL
PORT
USB
1µF
Dual Input Battery Charger for Single-Cell Li-Ion
1µF
2k
1%
U
1.24k
1%
DCIN
USBIN
IUSB
IDC
LTC4075
GND
ITERM
BAT
U
1%
2k
800mA (WALL)
500mA (USB)
+
4.2V
SINGLE CELL
Li-Ion BATTERY
4075 TA01
DESCRIPTIO
Adapter Standalone Li-Ion
The LTC
that are capable of charging a single-cell Li-Ion battery
from both wall adapter and USB inputs. The chargers can
detect power at the inputs and automatically select the
appropriate power source for charging.
No external sense resistor or blocking diode is required
for charging due to the internal MOSFET architecture.
Internal thermal feedback regulates the battery charge
current to maintain a constant die temperature during high
power operation or high ambient temperature conditions.
The fl oat voltage is fi xed at 4.2V and the charge current
is programmed with an external resistor. The LTC4075
terminates the charge cycle when the charge current drops
below the programmed termination threshold after the
fi nal fl oat voltage is reached. With power applied to both
inputs, the LTC4075/LTC4075X can be put into shutdown
mode reducing the DCIN supply current to 20µA, the USBIN
supply current to 10µA, and the battery drain current to
less than 2µA.
Other features include automatic recharge, undervoltage
lockout, charge status outputs, and “power present”
status outputs to indicate the presence of wall adapter
or USB power.
All other trademarks are the property of their respective owners.
*Protected by U.S. patents, including 6522118, 6700364
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
4075/LTC4075X are standalone linear chargers
Complete Charge Cycle (1100mAh Battery)
1000
–2.5
800
600
400
200
4.0
3.8
3.6
3.4
5.0
4.2
2.5
0
0
0
Dual Input USB/AC
LTC4075/LTC4075X
0.5
U
Battery Chargers
1.0
CONSTANT VOLTAGE
TIME (HR)
1.5
USBIN = 5V
T
R
R
2.0
A
IDC
IUSB
= 25°C
= 1.25k
= 2k
2.5
4075 TA01b
3.0
4075Xfa
1

Related parts for LTC4075EDD

LTC4075EDD Summary of contents

Page 1

... USB power. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. *Protected by U.S. patents, including 6522118, 6700364 Complete Charge Cycle (1100mAh Battery) ...

Page 2

... C to 125 C ORDER PART NUMBER LTC4075EDD LTC4075XEDD Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T SYMBOL PARAMETER I Trickle Charge Current (Note 6) TRIKL V Trickle Charge Threshold (Note 6) TRIKL V DCIN Undervoltage Lockout Voltage UVDC V USBIN Undervoltage Lockout Voltage UVUSB V V ...

Page 4

LTC4075/LTC4075X W U TYPICAL PERFOR A CE CHARACTERISTICS Regulated Output (Float) Voltage vs Charge Current 4. DCIN USBIN 4.24 4.22 4.20 4.18 4. 1.25k IDC IDC IUSB 4.14 ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Charge Current vs Ambient Temperature 1000 ONSET OF THERMAL REGULATION 800 R = 1.25k IDC 600 IDC IUSB 400 200 DCIN USBIN V ...

Page 6

LTC4075/LTC4075X W U TYPICAL PERFOR A CE CHARACTERISTICS Undervoltage Lockout Threshold vs Temperature 4.30 4.25 DCIN UVLO 4.20 4.15 4.10 4.05 USBIN UVLO 4.00 3.95 3.90 –50 – TEMPERATURE (°C) Battery Drain Current vs Temperature ...

Page 7

CTIO S USBIN (Pin 1): USB Input Supply Pin. Provides power to the battery charger. The maximum supply current is 650mA. This pin should be bypassed with a 1µF capacitor. IUSB (Pin 2): Charge Current ...

Page 8

LTC4075/LTC4075X W BLOCK DIAGRA DCIN 1mA MAX 7 USBPWR 10mA MAX 4 PWR 10mA MAX CHRG 5 LOGIC RECHRG TRICKLE TERM 6 ENABLE R ENABLE TERMINATION *TRICKLE CHARGE DISABLED ON THE LTC4075X 8 10 CC/CV REGULATOR + DC – 4.15V ...

Page 9

U OPERATIO The LTC4075 is designed to effi ciently manage charging of a single-cell lithium-ion battery from two separate power sources: a wall adapter and USB power bus. Using the constant-current/constant-voltage algorithm, the charger can deliver up to 950mA of ...

Page 10

LTC4075/LTC4075X U OPERATIO The termination condition is detected by using an internal fi ltered comparator to monitor the ITERM pin. When the ITERM pin voltage drops below 100mV t (typically 1.5ms), charging is terminated. The TERMINATE charge current is latched ...

Page 11

U OPERATIO The power supply status output ( ⎯ P ⎯ W ⎯ has two states: pull- down and high impedance. The pull-down state indicates that power is present at either DCIN or USBIN. This output is strong ...

Page 12

LTC4075/LTC4075X U U APPLICATIO S I FOR ATIO Using a Single Charge Current Program Resistor The LTC4075 can program the wall adapter charge current and USB charge current independently using two program resistors, R and R . Figure 2 shows ...

Page 13

... USB bus or wall adapter, the cable inductance along with the self resonant and high Q characteristics of ceramic capacitors can cause substantial ringing which could exceed the maximum voltage pin ratings and damage the LTC4075. Refer to Linear Technology Application Note 88, ° entitled “Ceramic Input Capacitors Can Cause Overvoltage 45 C Transients” ...

Page 14

LTC4075/LTC4075X U U APPLICATIO S I FOR ATIO makes them especially susceptible to this problem. To bypass the USB pin and the wall adapter input, add a 1Ω resistor in series with a ceramic capacitor to lower the effective Q ...

Page 15

... SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 10-Lead Plastic DFN (3mm × ...

Page 16

... Standalone Linear Li-Ion Battery Charger with Programmable Termination LTC4410 USB Power Manager and Battery Charger TM LTC4411/LTC4412 Low Loss PowerPath ThinSOT and PowerPath are trademarks of Linear Technology Corporation Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ...

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