Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

SC803IMLTR Datasheet(PDF) 7 Page - Semtech Corporation

Part # SC803IMLTR
Description  Fully Integrated High Current Lithium-Ion Battery Charger System
Download  17 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC803IMLTR Datasheet(HTML) 7 Page - Semtech Corporation

Back Button SC803IMLTR Datasheet HTML 3Page - Semtech Corporation SC803IMLTR Datasheet HTML 4Page - Semtech Corporation SC803IMLTR Datasheet HTML 5Page - Semtech Corporation SC803IMLTR Datasheet HTML 6Page - Semtech Corporation SC803IMLTR Datasheet HTML 7Page - Semtech Corporation SC803IMLTR Datasheet HTML 8Page - Semtech Corporation SC803IMLTR Datasheet HTML 9Page - Semtech Corporation SC803IMLTR Datasheet HTML 10Page - Semtech Corporation SC803IMLTR Datasheet HTML 11Page - Semtech Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 17 page
background image
7
 2004 Semtech Corp.
www.semtech.com
SC803
POWER MANAGEMENT
Applications Information (Cont.)
The CP output can be used for a UVLO indicator. Regard-
less of the state of EN, the CP output reflects the volt-
age of the VCC (adapter) input. When VCC is above UVLO,
CP is high, 2.8V. When VCC is below UVLO, CP is low, 0V.
The CP pin can also put the device into the charge mode
whenever the adaptor has power, by connecting it to the
BIP pin.
The OVP LED will light whenever the SC803 is enabled
and there is an overvoltage on the VCC pins. When this
occurs the SC803 will turn off and stay off as long as the
overvoltage condition remains. As soon as the overvolt-
age is removed the SC803 will resume operation. The
OVP LED will not light if the part is disabled, even though
an overvoltage is present on the VCC pins.
Configuring the Output Voltage to the Battery
The battery voltage is set by the VPRGM pin. If this pin 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. The VPRGM
pin can be tied to the CP pin for 4.2V operation and ground
for 4.1V operation. For a value other than 4.1V or 4.2V a
resistor divider is required. This divider is set between
the VOUT pin and the VPRGM pin with the divider tap
connected to the BSEN pin. The schematic for such a
connection and the equation to set the output voltage is
given in Figure 1. The output voltage for Figure 1 will be
set to 4.77V with the resistors shown. The capacitor C1
may be needed for stability and or reduced ripple volt-
age. It is advisable to leave room on the PCB for adding
this capacitor, since it can be left out if it is not needed.
The evaluation board does have a place for the resistor
divider and capacitor to allow an adjustable voltage to
be set on this board via R1, R2 and C2 (see schematic
on page 10). With JP7 removed, jumper JP2 should be
added to complete the changes required for adjustable
mode operation on the evaluation board. For further
evaluation board information, see the section tilted Evalu-
ation Board.
R2
CHARGER
BATTERY
+5V
PRESENT
R4
59K
C1
330pF
STATUS
SC803
14
1
3
7
4
15
9
10
2
11
5
8
13
6
16
12
VCC
BSEN
IPRGM
EN
ITERM
VOUT
OVP
STAT
VPRGM
CP
NC
BIP
VCC
GND
VOUT
NC
C2
1uF
FAULT
C3
2.2uF
R1
R3
100K
3.0
R3
R4
1
VOUT
 +
=
FIGURE 1
Remote Kelvin Sensing at the Battery
Another nice feature of the SC803 is its ability to sense
the battery voltage directly at the battery with its Kelvin
BSEN pin. This allows the designer great flexibility in PCB
layout and achieves a much greater accuracy in sensing
the battery voltage where it counts, at the battery termi-
nals! Therefore, when laying out the PCB the designer
should route the BSEN pin directly to the terminal at which
the battery gets connected. In addition, in the LDO mode,
the BSEN pin will still need to sense the output voltage.
In LDO mode, the BSEN pin becomes the regulation feed-
back for the control-loop. In this case it is sensing the
output voltage of itself, since the battery is not in place.
Therefore BSEN should never be left floating.....
Capacitor Selection
Input and output capacitors can be low cost ceramic type.
The output capacitance range is 1uF to 4.7uF. The input
capacitor should be between 0.1uF to 1uF.
Overcurrent and Temperature Protection
Overcurrent protection is inherent to the SC803. The
SC803 operates as a current source and the output cur-
rent is limited by the mode it is in at the time. If in the
fast-charge mode the current is limited by the IPRGM
resistor, the fast-charge current. When the output volt-
age is less than 2.8V, the current is limited by the ITERM
resistor, the pre-charge current. Both of these functions
protect the device in an event of a short circuit condition
on the output. In the LDO mode the current is limited to
the fast-charge current, provided there is voltage on the
output. Under a short circuit condition in the LDO mode
the current will enter a “hiccup” mode. The temperature
shutdown can protect the device in conditions of excess
current as well, by shutting down the device when its die
temperature exceeds 165oC.
G
A
L
F
D
E
LN
OF
F
O
H
G
I
H
E
C
N
A
D
E
P
M
I
P
C
C
C
V
O
T
R
E
W
O
P
S
N
I
P
O
T
R
E
W
O
P
O
N
S
N
I
P
C
C
V
X
P
V
O
-
R
E
V
O
C
C
V
E
G
A
T
L
O
V
E
G
A
T
L
O
V
C
C
V
L
A
M
R
O
N
X
T
A
T
S
Y
R
E
T
T
A
B
G
N
I
G
R
A
H
C
Y
L
L
U
F
Y
R
E
T
T
A
B
D
E
G
R
A
H
C
E
D
O
M
O
D
L


Similar Part No. - SC803IMLTR

ManufacturerPart #DatasheetDescription
logo
GardTec, Inc.
SC80-P10 GARDTEC-SC80-P10 Datasheet
26Kb / 1P
   Thru-hole Plastic
logo
Switchcraft, Inc.
SC800 SWITCH-SC800 Datasheet
225Kb / 1P
   600, 700, 702, 800 & 900 Series Overview
logo
celduc-relais
SC800010 CELDUC-SC800010 Datasheet
107Kb / 2P
   Power Solid State Relay
logo
SHENZHEN FUMAN ELECTRON...
SC8002B FUMAN-SC8002B Datasheet
471Kb / 6P
   3W audio power amplifier IC
logo
Switchcraft, Inc.
SC800CT SWITCH-SC800CT Datasheet
225Kb / 1P
   600, 700, 702, 800 & 900 Series Overview
More results

Similar Description - SC803IMLTR

ManufacturerPart #DatasheetDescription
logo
Semtech Corporation
SC801 SEMTECH-SC801_04 Datasheet
736Kb / 17P
   Fully Integrated High Current Lithium-Ion Battery Charger System
SC801 SEMTECH-SC801 Datasheet
360Kb / 17P
   Fully Integrated High Currnet Lithium-Ion Battery Charger System
SC802 SEMTECH-SC802 Datasheet
748Kb / 16P
   Fully Integrated Lithium-Ion Battery Charger System with Timer
SC802 SEMTECH-SC802_08 Datasheet
639Kb / 18P
   Fully Integrated Lithium-Ion Battery Charger System with Timer
SC804 SEMTECH-SC804 Datasheet
536Kb / 21P
   Fully Integrated Lithium-Ion Battery Charger System with Timer
SC804A SEMTECH-SC804A Datasheet
539Kb / 21P
   Fully Integrated 4.4V Lithium-Ion Battery Charger System with Timer
SC805 SEMTECH-SC805 Datasheet
283Kb / 15P
   Miniature Integrated High Current Lithium-Ion Battery Charger
SC805A SEMTECH-SC805A_08 Datasheet
424Kb / 17P
   Miniature Integrated High Current Lithium-Ion Battery Charger
SC805A SEMTECH-SC805A Datasheet
702Kb / 17P
   Miniature Integrated High Current Lithium-Ion Battery Charger
SC806 SEMTECH-SC806 Datasheet
413Kb / 13P
   Miniature High Current Lithium-Ion Battery Charger
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com