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LT1769CFE#PBF

Description
Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 2000mA 1V to 20V 20-Pin TSSOP EP Tube
CategoryBattery management   
File Size223KB,16 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LT1769CFE#PBF Overview

Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 2000mA 1V to 20V 20-Pin TSSOP EP Tube

LT1769CFE#PBF Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
TypeSwitching Battery Charger
Battery TypeNiMH|NiCd|Li-Pol|Li-Ion|Lead-Acid
Maximum Supply Current (mA)7
Minimum Operating Supply Voltage (V)7
Maximum Operating Supply Voltage (V)29
Output Voltage (V)1 to 20
Output Current (mA)2000(Max)
Minimum Operating Temperature (°C)0
Maximum Operating Temperature (°C)70
Supplier Temperature GradeCommercial
PackagingTube
Pin Count20
Standard Package NameSOP
Supplier PackageTSSOP EP
MountingSurface Mount
Package Height1.05(Max)
Package Length6.6(Max)
Package Width4.5(Max)
PCB changed20
Lead ShapeGull-wing
FEATURES
s
LT1769
Constant-Current/
Constant-Voltage 2A Battery
Charger with Input Current Limiting
DESCRIPTIO
The LT
®
1769 current mode PWM battery charger is a
simple, efficient solution to fast charge modern recharge-
able batteries including lithium-ion (Li-Ion), nickel-metal-
hydride (NiMH) and nickel-cadmium (NiCd) that require
constant-current and/or constant-voltage charging. The
internal switch is capable of delivering 2A** DC current
(3A peak current). Charge current can be programmed by
resistors or a DAC to within 5%. With 0.5% reference voltage
accuracy, the LT1769 meets the critical constant-voltage
charging requirement for Li-Ion cells.
A third control loop is provided to regulate the current
drawn from the input AC adapter. This allows simulta-
neous operation of the equipment and battery charging
without overloading the adapter. Charge current is reduced
to keep the adapter current below specified levels.
The LT1769 can charge batteries ranging from 1V to 20V.
Ground sensing of current is not required and the battery’s
negative terminal can be tied directly to ground. A saturat-
ing switch running at 200kHz gives high charging effi-
ciency and small inductor size. A blocking diode is not
required between the chip and the battery because the
chip goes into sleep mode and drains only 3µA when the
wall adapter is unplugged.
s
s
s
s
s
s
s
s
s
s
s
Simple Solution to Charge NiCd, NiMH and Lithium
Rechargeable Batteries—Charging Current
Programmed by Resistors or DAC
Adapter Current Limit Allows Maximum Possible
Charging Current During System Use*
Precision 0.5% Accuracy for Voltage Mode Charging
Available in 20-Lead Exposed Pad TSSOP and
28-Lead Narrow SSOP Packages
High Efficiency Current Mode PWM with 3A Internal
Switch
5% Charge Current Accuracy
Adjustable Undervoltage Lockout
Automatic Shutdown When AC Adapter is Removed
Low Reverse Battery Drain Current: 3µA
Current Sensing Can Be at Either Terminal of the Battery
Charging Current Soft Start
Shutdown Control
APPLICATIO S
s
s
Chargers for NiCd, NiMH, Lead-Acid, Lithium
Rechargeable Batteries
Switching Regulators with Precision Current Limit
, LTC and LT are registered trademarks of Linear Technology Corporation.
*US patent number 5,723,970
**See LT1510 for 1.5A charger; see LT1511 for 3A charger
TYPICAL APPLICATIO
D1
††
SS24
R7
500Ω
GND
SW
BOOST
LT1769
COMP1
2nF
10k
SPIN
OVP SENSE
UV
PROG
V
C
BAT
R
S2
200Ω
1%
R3
+
390k
0.25%
BATTERY
VOLTAGE SENSE
R4
162k
0.25%
0.33µF
300Ω
C
PROG
1µF
R
PROG
4.93k
1%
CLP
CLN
V
CC
C1
1µF
C
IN
*
15µF
C2
0.47µF
L1**
22µH
D2
1N4148
NOTE: COMPLETE LITHIUM-ION CHARGER,
NO TERMINATION REQUIRED. R
S4
, R7
AND C1 ARE OPTIONAL FOR I
IN
LIMITING
*TOKIN OR UNITED CHEMI-CON/MARCON
CERAMIC SURFACE MOUNT
**22µH SUMIDA CDRH125
SEE APPLICATIONS INFORMATION FOR
INPUT CURRENT LIMIT AND UNDERVOLTAGE LOCKOUT
††
GENERAL SEMICONDUCTOR. FOR T
J
LESS THEN 100°C
MBRS130LT3 CAN BE USED
R
S3
200Ω
1%
R
S1
0.05Ω
BATTERY CURRENT
SENSE
C
OUT
22µF
TANT
Figure 1. 2A Lithium-Ion Battery Charger
U
U
U
D3
††
SS24
R
S4
ADAPTER
CURRENT SENSE
V
IN
(ADAPTER INPUT)
11V TO 28V
TO MAIN
SYSTEM LOAD
R5
UNDERVOLTAGE
LOCKOUT
R6
5k
V
BAT
8.4V
Li-Ion
1511 • F01
1769fa
1

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Description Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 2000mA 1V to 20V 20-Pin TSSOP EP Tube Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 2000mA 1V to 20V 20-Pin TSSOP EP T/R Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 2000mA 1V to 20V 28-Pin SSOP N Tube Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 2000mA 1V to 20V 28-Pin SSOP N T/R Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 2000mA 1V to 20V Automotive 20-Pin TSSOP EP Tube Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 2000mA 1V to 20V Automotive 20-Pin TSSOP EP T/R Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 2000mA 1V to 20V 20-Pin TSSOP EP Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 2000mA 1V to 20V Automotive 28-Pin SSOP N Tube Switching Battery Charger Lead-Acid/Li-Ion/Li-Pol/NiCd/NiMH 2000mA 1V to 20V Automotive 28-Pin SSOP N T/R
EU restricts the use of certain hazardous substances Compliant Compliant Compliant Compliant Compliant Compliant Not Compliant Compliant Compliant
ECCN (US) EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99 EAR99
Part Status Active Active Active Active Active Active Unconfirmed Active Active
HTS 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01 8542.39.00.01
Type Switching Battery Charger Switching Battery Charger Switching Battery Charger Switching Battery Charger Switching Battery Charger Switching Battery Charger Switching Battery Charger Switching Battery Charger Switching Battery Charger
Battery Type NiMH|NiCd|Li-Pol|Li-Ion|Lead-Acid Lead-Acid|Li-Ion|Li-Pol|NiCd|NiMH Lead-Acid|Li-Ion|Li-Pol|NiCd|NiMH Lead-Acid|Li-Ion|Li-Pol|NiCd|NiMH Lead-Acid|Li-Ion|Li-Pol|NiCd|NiMH Lead-Acid|Li-Ion|Li-Pol|NiCd|NiMH Lead-Acid|Li-Ion|Li-Pol|NiCd|NiMH NiMH|NiCd|Li-Pol|Li-Ion|Lead-Acid Lead-Acid|Li-Ion|Li-Pol|NiCd|NiMH
Maximum Supply Current (mA) 7 7 7 7 7 7 7 7 7
Minimum Operating Supply Voltage (V) 7 7 7 7 7 7 7 7 7
Maximum Operating Supply Voltage (V) 29 29 29 29 29 29 29 29 29
Output Voltage (V) 1 to 20 1 to 20 1 to 20 1 to 20 1 to 20 1 to 20 1 to 20 1 to 20 1 to 20
Output Current (mA) 2000(Max) 2000(Max) 2000(Max) 2000(Max) 2000(Max) 2000(Max) 2000(Max) 2000(Max) 2000(Max)
Minimum Operating Temperature (°C) - - - - -40 -40 -40 -40 -40
Maximum Operating Temperature (°C) 70 70 70 70 85 85 85 85 85
Supplier Temperature Grade Commercial Commercial Commercial Commercial Industrial Industrial Industrial Industrial Industrial
Pin Count 20 20 28 28 20 20 20 28 28
Standard Package Name SOP SOP SOP SOP SOP SOP SOP SOP SOP
Supplier Package TSSOP EP TSSOP EP SSOP N SSOP N TSSOP EP TSSOP EP TSSOP EP SSOP N SSOP N
Mounting Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount Surface Mount
Package Height 1.05(Max) 1.05(Max) 1.5(Max) 1.5(Max) 1.05(Max) 1.05(Max) 1.05(Max) 1.5(Max) 1.5(Max)
Package Length 6.6(Max) 6.6(Max) 9.98(Max) 9.98(Max) 6.6(Max) 6.6(Max) 6.6(Max) 9.98(Max) 9.98(Max)
Package Width 4.5(Max) 4.5(Max) 3.99(Max) 3.99(Max) 4.5(Max) 4.5(Max) 4.5(Max) 3.99(Max) 3.99(Max)
PCB changed 20 20 28 28 20 20 20 28 28
Lead Shape Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing Gull-wing
Packaging Tube Tape and Reel Tube Tape and Reel Tube Tape and Reel - Tube Tape and Reel
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