LTC4002EDD-4.2#TRPBF Linear Technology, LTC4002EDD-4.2#TRPBF Datasheet

IC CHARGER BATTERY LI-ION 10-DFN

LTC4002EDD-4.2#TRPBF

Manufacturer Part Number
LTC4002EDD-4.2#TRPBF
Description
IC CHARGER BATTERY LI-ION 10-DFN
Manufacturer
Linear Technology
Type
Battery Chargerr
Datasheet

Specifications of LTC4002EDD-4.2#TRPBF

Function
Charge Management
Battery Type
Lithium-Ion (Li-Ion)
Voltage - Supply
4.7 V ~ 22 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
10-WFDFN Exposed Pad
Output Voltage
4.2V
Operating Supply Voltage (min)
4.7V
Operating Supply Voltage (max)
22V
Operating Temp Range
-40C to 85C
Package Type
DFN
Mounting
Surface Mount
Pin Count
10
Operating Temperature Classification
Industrial
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Part Number
Manufacturer
Quantity
Price
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Part Number:
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Manufacturer:
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APPLICATIO S
FEATURES
TYPICAL APPLICATIO
Wide Input Supply Range:
High Efficiency Current Mode PWM Controller with
500kHz Switching Frequency
±1% Charge Voltage Accuracy
End-of-Charge Current Detection Output
3 Hour Charge Termination Timer
Constant Switching Frequency for Minimum Noise
±5% Charge Current Accuracy
Low 10µA Reverse Battery Drain Current
Automatic Battery Recharge
Automatic Shutdown When Input Supply is Removed
Automatic Trickle Charging of Low Voltage Batteries
Battery Temperature Sensing and Charge
Qualification
Stable with Ceramic Output Capacitor
8-Lead SO and 10-Lead DFN Packages
Portable Computers
Charging Docks
Handheld Instruments
4.7V to 22V – 4.2 Version
8.9V to 22V – 8.4 Version
CHARGE
STATUS
BAT
U
1.5A Single Cell Li-Ion Battery Charger
2k
2.2k
0.47µF
0.1µF
CHRG
COMP
LTC4002ES8-4.2
NTC
T
V
U
10k
NTC
CC
SENSE
GND
GATE
BAT
NTC: DALE NTHS-1206N02
5V TO 22V
V
IN
6.8µH
68mΩ
22µF
+
4002 TA01
Switch Mode Battery Charger
Li-Ion
BATTERY
10µF
DESCRIPTIO
The LTC
one (4.2V) or two (8.4V) cell lithium-ion batteries. With a
500kHz switching frequency, the LTC4002 provides a
small, simple and efficient solution to fast charge Li-Ion
batteries from a wide range of supply voltages. An external
sense resistor sets the charge current with ±5% accuracy.
An internal resistor divider and precision reference set the
final float voltage to 4.2V per cell with ±1% accuracy.
When the input supply is removed, the LTC4002 automati-
cally enters a low current sleep mode, dropping the battery
drain current to 10µA. An internal comparator detects the
near end-of-charge condition while an internal timer sets
the total charge time and terminates the charge cycle. After
the charge cycle ends, if the battery voltage drops below
4.05V per cell, a new charge cycle will automatically begin.
The LTC4002 is available in the 8-lead SO and 10-lead DFN
packages.
All other trademarks are the property of their respective owners.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
4002 is a complete battery charger controller for
100
90
80
70
60
Standalone Li-Ion
U
5
Efficiency vs Input Voltage
(CURVES INCLUDE
INPUT DIODE)
V
BAT
10
V
INPUT VOLTAGE (V)
= 3.8V
BAT
= 4V
15
20
LTC4002
4002 TA02
25
1
4002f

Related parts for LTC4002EDD-4.2#TRPBF

LTC4002EDD-4.2#TRPBF Summary of contents

Page 1

... The LTC4002 is available in the 8-lead SO and 10-lead DFN packages. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners 22V 10µ ...

Page 2

... Storage Temperature Range ................. – 65°C to 125° Lead Temperature (S8 Package) (Soldering, 10 sec) ........................................... 300° ORDER PART NUMBER COMP 1 LTC4002EDD-4 LTC4002EDD-8.4 GATE 3 GND 4 DD PART MARKING LAGG 8-LEAD PLASTIC 125°C, θ JMAX LBGY (LTC4002-4.2) The ● denotes the specifications which apply over the full = 25° ...

Page 3

ELECTRICAL CHARACTERISTICS operating temperature range, otherwise specifications are at T SYMBOL PARAMETER I NTC Pin Output Current NTC V NTC Pin Threshold Voltage (Hot) NTC-HOT V NTC Pin Threshold Voltage (Cold) NTC-COLD Recharge Battery Voltage Offset from Full ∆V RECHRG ...

Page 4

LTC4002 ELECTRICAL CHARACTERISTICS operating temperature range, otherwise specifications are at T SYMBOL PARAMETER V NTC Pin Threshold Voltage (Hot) NTC-HOT V NTC Pin Threshold Voltage (Cold) NTC-COLD Recharge Battery Voltage Offset from Full ∆V RECHRG Charged Battery Voltage I CHRG ...

Page 5

W U TYPICAL PERFOR A CE CHARACTERISTICS Oscillator Frequency 510 500 490 (V) CC 4002 G04 CHRG Pin Output Low Voltage vs Temperature 180 I = 1mA LOAD 140 100 – ...

Page 6

LTC4002 W U TYPICAL PERFOR A CE CHARACTERISTICS Current Mode Sense Voltage vs Temperature 104 100 96 – 50 – 100 125 TEMPERATURE (°C) 4002 G13 COMP Pin Output Current 102 V ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS Trickle Charge Voltage 5.2 LTC4002-8 BAT 5.0 4 (V) CC 4002 G22 Trickle Charge Sense Voltage vs Temperature 10 ...

Page 8

LTC4002 W U TYPICAL PERFOR A CE CHARACTERISTICS End-of-Charge Ratio vs Temperature 14 LTC4002-8 – 50 – TEMPERATURE (° CTIO S (DFN/SO-8) COMP (Pin ...

Page 9

CTIO S (DFN/SO-8) hot temperature or rises above 2.465V at cold temperature, charging is suspended and the internal timer stops. The CHRG pin output is not affected during this hold state BLOCK DIAGRA ...

Page 10

LTC4002 TEST CIRCUITS Test Circuit 1 15V – 1.5V LT1006 + 0V – 100µA COMP CA + – LTC4002 U OPERATIO The LTC4002 is a constant current, constant voltage Li-Ion battery charger controller that uses a current mode ...

Page 11

U OPERATIO mode, dropping I to 10µA. This will greatly reduce the CC current drain on the battery and increase the standby time. A 10kΩ NTC (negative temperature coefficient) thermistor can be connected from the NTC pin to ground for ...

Page 12

LTC4002 U U APPLICATIO S I FOR ATIO impedance state, the current source will pull the pin low through the 390k resistor. When the internal timer has expired, the CHRG pin changes to a high impedance state and the 390k ...

Page 13

U U APPLICATIO S I FOR ATIO Input and Output Capacitors Since the input capacitor is assumed to absorb all input switching ripple current in the converter, it must have an adequate ripple current rating. Worst-case RMS ripple cur- rent ...

Page 14

LTC4002 U U APPLICATIO S I FOR ATIO Next, choose the P-channel MOSFET. The Si6435ADQ in a TSSOP-8 package with R = 42mΩ (nom), 55mΩ DS(ON) (max) offers a small solution. The maximum power dissi- pation with ...

Page 15

... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) 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 represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 16

... Standalone Linear Li-Ion Battery Charger with Integrated Pass Transistor in ThinSOT LTC4056 Standalone SOT-23 Li-Ion Linear Battery Charger TM LTC4412/LTC4413 Low Loss PowerPath PowerPath and ThinSOT 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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