SC802IMLTRT Semtech, SC802IMLTRT Datasheet - Page 12

• Manufacturer Part Number: SC802IMLTRT
• Description: IC, BATTERY CHARGER, 1A, MLPQ-16
• Manufacturer: Semtech

Specifications of SC802IMLTRT

• Battery Type: Li-Ion, Li-Polymer
• Input Voltage: 14V
• Battery Charge Voltage: 4.2V
• Charge Current Max: 1A
• Battery Ic Case Style: MLPQ
• No. Of Pins: 16
• No. Of Series Cells: 1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Applications Information (continued)
The CPB output can be used as a VCC–valid detector.
When V
CPB output is low. In the SC802, the CPB output refl ects
the voltage of the VCC input regardless of the voltage
V
(high) when the charger is disabled, regardless of V
The CHRGB output signifi es the charging status. When
I
I
cycle when the output current is less than I
is reset when the battery enters a re-charge cycle, or if
BIPB, EN_NTC, or VCC are toggled. The CHRGB indicator
operates the same way in both charging and LDO
modes.
The five fault conditions detected by the SC802/A are
input under-voltage, input over-voltage, NTC temperature
fault, maximum die over-temperature (OT) fault, and pre-
VOUT
VOUT
CHARGER VIN
EN_NTC
(1) Output remains on when timer is enabled and t < T
Indicator
< I
C
CHRGB
> I
Status
VCC
1μF
CPB
. In the SC802A, the CPB output becomes inactive
TERM
TERM
VCC
. The CHRGB output is latched during the charge
is between the UVLO and OVP thresholds the
, CHRGB is driven low. CHRGB is high when
Thermistor
R
I
NPU
OUT
(active
R
< V
UVLO
low)
NTC
OVP
ON
> I
VCC
TERM
<
R
IPRGM
I
(inactive
Power Not
OUT
high)
Good
OFF
< I
R
TERM
ITERM
Figure 1. V
(1)
TERM
or NTC fault
Pre-charge
Blinking
© 2008 Semtech Corporation
. This latch
QCOMP
CV
VCC1
VCC2
IPRGM
EN_NTC
ITERM
BIPB
GND
RFGND
X
SC802/SC802A
.
Adjust Mode programming.
VCC
AFC I
.
SET
VPRGM
CHRGB
VOUT1
VOUT2
RTIME
BSEN
CPB
AFC
charge timeout. The status indicator states for these fault
conditions are shown in the following table.
Confi guring the Output Voltage to the Battery
V
The battery voltage is set by the VPRGM pin in fi xed mode
and externally in the adjust mode. If VPRGM is logic high
the output voltage is set to 4.2V. If this pin is logic low the
output voltage will be set to 4.1V. For a value other than
4.1V or 4.2V a resistor divider is required.
V
V
other than 4.1V or 4.2V. In V
tion voltage is set by an external resistor divider. The
SC802/A Adjust Mode schematic is shown in Figure 1. The
SC802/A provides the capability, via the VPRGM pin, to
disconnect the external feedback resistor divider when
the charging source is removed, to reduce current drain
from the battery through the resistor network. Connect
the external resistor divider between the VOUT pins and
CV
CV
CV
Adjust Mode permits confi guring the SC802/A for V
Fixed Mode
Adjust Mode
Pre-Charge Time-out
VCC UVLO or
BAT.
TJ > 150ºC
NTC Fault
VCC OVP
Fault
R
R
C
2.2μF
ADJ-LO
ADJ-HI
C
VOUT
ADJ
R
RTIME
CV
Adjust Mode the CV regula-
SC802/SC802A
CHARGE
CPB
OFF
OFF
ON
ON
Blinking
Blinking
CHARGER
PRESENT
CHRB
OFF
OFF
12
CV