LTC4006EGN-2 Linear Technology, LTC4006EGN-2 Datasheet - Page 9

• Manufacturer Part Number: LTC4006EGN-2
• Description: IC CHARGER BATTERY 4A 16-SSOP
• Manufacturer: Linear Technology

Specifications of LTC4006EGN-2

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 6 V ~ 28 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP (0.150", 3.90mm Width)
• Output Current: 4A
• Output Voltage: 12.6V
• Operating Supply Voltage (min): 6V
• Operating Supply Voltage (max): 28V
• Operating Temp Range: -40C to 85C
• Package Type: SSOP N
• Mounting: Surface Mount
• Pin Count: 16
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

OPERATIO
*Open Drain. High when used with pull-up resistor.
**Most probable condition, X = Don’t care
compares this current against the desired current programmed
by R
therefore,
The voltage at BAT is divided down by an internal resistor
divider and is used by error amp EA to decrease I
divider voltage is above the 1.19V reference. When the
charging current begins to decrease, the voltage at I
will decrease in direct proportion. The voltage at I
then given by:
Table 1. Truth Table for LTC4006 Operation
MODE
Shut Down by Low Adapter Voltage
Conditioning a Depleted Battery
Normal Charging
Input Current Limited Charging
Charger Paused Due to Thermistor Out of Range
Shut Down by ACP/SHDN Pin
Terminated by Low-Battery Fault (Note 1)
Top-Off Charging. C/10 is Latched
Timer is Reset by C/10 Comparator (Latched),
then Terminates After 1/4 T
Terminated by Expired Timer
Timer Defeated. (Low-Battery Conditioning Still
Functional)
Shut Down by Undervoltage Lockout
Timer Defeated Until V
V
I
R
CHARGE
IMON
V
IMON
IMON
REF
=
at the I
=
(
=
I
CHARGE
V
⎛
⎜
⎝
CSP
R
V
MON
IMON
BAT
REF
U
–
> 3.9V/Cell
V
•
pin and adjusts I
BAT
R
–
SENSE
11 67
3
+
.
k
11 67
Ω
+
µ
.
11 67
A
⎞
⎟
⎠
µ
.
•
A
R
TH
•
µ
3
SENSE
3
and <UVL
k
A
until:
k
Ω
<BAT
>BAT
>BAT
>BAT
>BAT
>BAT
>BAT
>BAT
>BAT
>BAT
>BAT
>BAT
DCIN
Ω
•
X
3
k
Ω
)
•
2.5V ≤ V
TH
R
MON
BAT VOLTAGE
3
IMON
if the
<2.5V/Cell
>2.5V/Cell
>2.5V/Cell
<2.5V/Cell
k
V
MON
(V/Cell)
>UVLO
V
V
Ω
FLOAT
<UVL
FLOAT
FLOAT
is
X
X
X
BAT
**
≤3.9V
Note 1: If a depleted battery is inserted while the charger is in this state,
the charger must be reset to initiate charging.
The accuracy of V
V
The amplifier CL1 monitors and limits the input current to
a preset level (100mV/R
decrease the I
rent. When this condition is detected, the C/10 indicator will
IMON
10% Programmed
BAT CURRENT
Programmed
Programmed
Programmed
is plotted in Figure 2.
Leakage
Current
Current
Current
Current
OFF
OFF
OFF
OFF
OFF
OFF
OFF
X
0.6
1.2
1.0
0.8
0.4
0.2
TH
0
0
Figure 2. V
voltage, thereby reducing charging cur-
IMON
I
CHARGE
0.309V
Forced LOW
20
ACP/SHDN
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
LOW
(% OF MAXIMUM CURRENT)
will range from 0% to I
CL
X
40
). At input current limit, CL1 will
IMON
60
vs I
Comparator Trip.
Comparator Trip.
<T/4 After C/10
>T/4 After C/10
1.19V
TIMER STATE
>T/4 Stopped
>T Stopped
CHARGE
Running
Running
Running
Running
Stopped
Running
Paused
80
Reset
Reset
Reset
X
4006 F02
LTC4006
100
LOW or 25µA
Forced LOW
for Restart)
for Restart)
TOL
(Faulted)
(Faulted)
(Waiting
(Waiting
HIGH**
CHG*
HIGH
HIGH
HIGH
25µA
HIGH
HIGH
LOW
LOW
LOW
LOW
.
4006fa
9