LM3621M/NOPB National Semiconductor, LM3621M/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM3621M/NOPB
• Description: IC CTRLR LI-ION BAT CHRG 16-SOIC
• Manufacturer: National Semiconductor

Specifications of LM3621M/NOPB

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion)
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM3621M; *LM3621M/NOPB; LM3621M

www.national.com
I
V
G
I
V
V
V
V
V
V
I
LKG
LED
DIG
BSD
SUV
UVR
PFD
PFD
IL
IH
CSR
Electrical Characteristics
Note 1: Absolute Maximum Ratings indicates limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device is
intended to be functional, but device parameter specifications may not be guaranteed under these conditions. For guaranteed specifications and test conditions, see
the Electrical Characteristics.
Note 2: ESD rating is based on the human body model, 100 pF discharged through 1.5 kΩ.
Note 3: LM3621 requires a minimum V
Note 4: V
Note 5: V
Note 6: V
Note 7: V
Note 8: This is the current drawn from the battery by the LM3621 when V
Note 9: This is the current drawn from the battery by the LM3621 when the charger is in Monitor Mode.
Note 10: This is the maximum battery voltage droop that is allowed before the charger initiates a fast charge mode to refresh the battery to its full charge capacity.
Note 11: The current regulation and detection levels can be set by applying a dc voltage adjusting between 0.1V to 1V to the I
of the current sense resistor. To ensure proper operation, if the default current regulation and detection values are desired, then a capacitor of at least 100 pF should
be connected from I
Note 12: Transfer ratio of V
Note 13: Minimum V
Note 14: The LM3621 goes to a shutdown or reset state during “brown out” (i.e., when V
Note 15: Digital inputs are Enable, Boost, Chgint and V
Note 16: No external voltage applied to I
Definition of Terms
V
V
CSR and V
V
V
ESR: The equivalent series resistance of a battery. The ESR
is the purely resistive component of a battery’s impedance.
Its value is usually determined by the battery construction.
Symbol
V
apply over full operating temperature range.
OUT
CSR
BATTERY
BAT
-MM
DD
-MAX
-MIN
+ and V
: Voltage measured between V
: Charging current sense voltage measured between
= 4.2V unless otherwise specified. Specifications with standard type face are for T
OUT
CSR
BAT
CSR
: Battery terminal voltage measured between
-Det is measured between V
-Det is measured between CSR and V
SS
is measured between V
is measured between CSR and V
Battery Load Current (Note 9)
Maximum Allowed Battery Self-
Discharge(Note 10)
Fast Charge Current Regulation
Adjustment Transfer Ratio (Notes
11, 12)
LED1 & LED2 Driver Sink Current
Start Up Voltage (Note 13)
Under Voltage Reset (Note 14)
Maximum PFD Output Drive
Minimum PFD Output Drive
Logic Input Low (Note 15)
Logic Input High (Note 15)
Digital Input Leakage Current
(Note 15)
BAT
(Gnd).
SET
−.
DD
to V
supply voltage required at start-up.
CSR
SS
Parameter
(GND).
/V
ISET
BAT
to adjust the fast charge current regulation level. See application section.
DD
set
+ and CSR.
BAT
of 3.4V to start-up. After start-up, the operating range is 3.0V to 5.5V.
pin; a 100 pF capacitor is connected across I
+ and V
BAT
SS
+ and CSR.
(across the current sense resistor).
SS
BAT
(Continued)
(across the current sense resistor).
SET
−.
. To ensure proper operation, never allow any unused input pin to be left open.
Monitor Mode
V
V
V
V
no DC load on PFD
no DC load on PFD
SET
SET
ISET
LED1
= HI
= LO
= 0.5V
= V
DD
LED2
Conditions
= 0V.
4
= 1.5V
RFV: The RFV (resistance free voltage, often called the float
voltage) is the open circuit terminal voltage of a battery
which is free from the ESR voltage drop error.
VI
tween I
SET
DD
set
: External voltage applied to I
<
and V
SET
V
UVR
SS
and V
)
.
SS
V
V
, to override the default value of V
A
DD
DD
0.90
Min
220
70
20
−1
= 25˚C, and those with boldface type
−0.2
−0.5
SET
0.93
Typ
110
260
3.4
2.2
1
pin without changing the value
SET
pin, measured be-
V
SS
Max
0.96
150
300
0.5
10
1
+0.1
CSR
Units
V/V
mV
mV
mA
µA
µA
V
V
V
V
V
V
.