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PDF ISL9203R5220 Data sheet ( Hoja de datos )
| Número de pieza | ISL9203R5220 | |
| Descripción | Li-ion/Li Polymer Battery Charger | |
| Fabricantes | Intersil Corporation | |
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Data Sheet
ISL9203R5220
January 3, 2006
FN9242.1
Li-ion/Li Polymer Battery Charger
Features
The ISL9203R5220 is an integrated single-cell Li-ion or
Li-polymer battery charger capable of operating with an input
voltage as low as 2.4V. This charger is designed to work with
various types of AC adapters.
The ISL9203R5220 operates as a linear charger when the
AC adapter is a voltage source. The battery is charged in a
CC/CV (constant current/constant voltage) profile. The
charge current is programmable with an external resistor up
to 1.5A. The ISL9203R5220 can also work with a current-
limited adapter to minimize the thermal dissipation, in which
case the ISL9203R5220 combines the benefits of both a
linear charger and a pulse charger.
The ISL9203R5220 features charge current thermal
foldback to guarantee safe operation when the printed circuit
board is space limited for thermal dissipation. Additional
features include preconditioning of an over-discharged
battery and thermally enhanced DFN package.
• Complete Charger for Single-Cell Li-ion Batteries
• Very Low Thermal Dissipation
• Integrated Pass Element and Current Sensor
• No External Blocking Diode Required
• 1% Voltage Accuracy
• Programmable Current Limit up to 1.5A
• Charge Current Thermal Foldback
• Accepts Multiple Types of Adapters
• Guaranteed operation down to VIN = 2.65V after start up
• Ambient Temperature Range: -20°C to 70°C
• Thermally-Enhanced DFN Packages
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
Typical Application Circuit
• Handheld Devices including Medical Handhelds
5V
Input
VIN VBAT
C1 ISL9203
Floating
to Enable
VSEN
STATUS
EN
V2P8
IREF
TIME GND
CTIME
C2
C3
RIREF
• PDAs, Cell Phones and Smart Phones
• Portable Instruments, MP3 Players
• Self-Charging Battery Packs
• Stand-Alone Chargers
• USB Bus-Powered Chargers
Related Literature
• Technical Brief TB363 “Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)”
• Technical Brief TB379 “Thermal Characterization of
Packaged Semiconductor Devices”
• Technical Brief TB389 “PCB Land Pattern Design and
Surface Mount Guidelines for QFN Packages”
Ordering Information
PART NUMBER
(Note)
ISL9203CRZR5220
PART
TEMP.
PACKAGE PKG
MARKING RANGE (°C) (Pb-free) DWG. #
03CZ
-20 to 70 10 Ld 3x3 DFN L10.3x3
Pinout
ISL9203R5220
(3x3 DFN)
TOP VIEW
ISL9203CRZ-TR5220
10 Ld 3x3 DFN Tape and Reel
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both SnPb
and Pb-free soldering operations. Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed the
Pb-free requirements of IPC/JEDEC J STD-020.
VIN 1
NC 2
STATUS 3
TIME 4
GND 5
10 VBAT
9 VSEN
8 IREF
7 V2P8
6 EN
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2005, 2006. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL9203R5220
Typical Operating Performance The test conditions for the Typical Operating Performance are: VIN = 5V, TA = 25°C,
RIREF = RIMIN = 80kΩ, VBAT = 3.7V, unless otherwise noted. (Continued)
700
650
600
550
500
450
400
350
300
250
200
0
THERMAL FOLDBACK STARTS
NEAR 100°C
20 40 60 80 100 120
TEMPERATURE (°C)
FIGURE 9. rDS(ON) vs TEMPERATURE AT 3.7V OUTPUT
420
400 500mA CHARGE
CURRENT, RIREF = 40K
380
360
340
320
300
280
260
3.0 3.2 3.4 3.6 3.8 4.0
VBAT (V)
FIGURE 10. rDS(ON) vs OUTPUT VOLTAGE USING CURRENT
LIMITED ADAPTERS
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
20 40 60 80 100 120
TEMPERATURE (°C)
FIGURE 11. REVERSE CURRENT vs TEMPERATURE
32
30 EN = GND
28
26
24
22
20
18
16
14
12
10
3.0 3.5 4.0 4.5 5.0 5.5 6.0
VIN (V)
FIGURE 13. INPUT QUIESCENT CURRENT vs INPUT
VOLTAGE WHEN SHUTDOWN
6.5
5
50
45 EN = GND
40
35
30
25
20
15
10
5
0
0 20 40 60 80 100 120
TEMPERATURE (°C)
FIGURE 12. INPUT QUIESCENT CURRENT vs TEMPERATURE
1.10
1.05
1.00
0.95
0.90
BOTH VBAT AND EN
PINS FLOATING
0.85
0.80
4.3 4.6 4.9 5.2 5.5 5.8 6.1
VIN (V)
FIGURE 14. INPUT QUIESCENT CURRENT vs INPUT
VOLTAGE WHEN NOT SHUTDOWN
6.4
FN9242.1
January 3, 2006
5 Page 
ISL9203R5220
Recharge
After a charge cycle completes, the charger continues to
regulate the output at the constant voltage; but the STATUS
pin indicates that the charging is completed. The STATUS
pin stays high until the battery voltage drops to below the
recharge threshold, VRECHRG (see Electrical
Specifications). Then the STATUS pin goes low and a new
charge cycle starts at point t6. The charge cycle ends at
point t7 with the STATUS pin again going high, as shown in
Figure 20.
VIN
V2P8
POR Threshold
Charge Cycle
Charge Cycle
STATUS
At least 15
Cycles
VBAT
ICHARGE
VRECHRG
2.8V VMIN
IMIN
t0 t1 t2 t3
t4 t5
t6
FIGURE 20. OPERATION WAVEFORMS
t7
Internal Oscillator
The internal oscillator establishes a timing reference. The
oscillation period is programmable with an external timing
capacitor, CTIME, as shown in Typical Applications. The
oscillator charges the timing capacitor to 1.5V and then
discharges it to 0.5V in one period, both with 10µA current.
The period TOSC is:
TOSC = 0.2 ⋅ 106 ⋅ CTIME
( sec onds)
(EQ. 3)
A 1nF capacitor results in a 0.2ms oscillation period.The
accuracy of the period is mainly dependent on the accuracy
of the capacitance and the internal current source.
Charge Current Programming
The charge current in the CC mode is programmed by the
IREF pin. The voltage of IREF is regulated to a 0.8V
reference voltage. The charging current during the constant
current mode is 100,000 times that of the current in the
RIREF resistor. Hence, the charge current is,
IREF= -R--0--I-.-R-8---E-V---F-- × 105(A)
(EQ. 4)
Table 1 shows the charge current vs. selected RIREF values.
The typical trickle charge current is 10% of the programmed
constant charge current. Table 2 shows the trickle charge
current tolerance guidance at given RIREF values, when the
battery voltage is between 0V to 2.5V.
TABLE 1. CHARGE CURRENT vs RIREF VALUES.
CHARGE CURRENT (mA)
RIREF (kΩ)
267 ~ 160
MIN
17% lower than
TYP Value
TYP
= IREF
in EQ. 5
MAX
17% higher than
TYP Value
160 450 500 550
100 720 800 880
88.9 810 900 990
80
900
1000
1100
TABLE 2. TRICKLE CHARGE CURRENT vs RIREF VALUES.
TRICKLE CHARGE CURRENT (mA)
RIREF (kΩ)
267
MIN TYP MAX
15 30
60
160
30 50
80
100 40 80 120
88.9 45 90 135
80 70 100 150
NOTE: The values in table 2 and table 1 are not tested and are only
for guidance in selecting resistor values for mass production tests or
in customer’s products.
End-of-Charge (EOC) Current
The EOC current IMIN sets the level at which the charger
starts to indicate the end of the charge with the STATUS pin,
as shown in Figure 20. The charger actually does not
terminate charging. In the ISL9203R5220, the EOC current
is internally set to 1/10 of the CC charge current, that is,
IMIN= 1--1--0-- ⋅ IREF
(EQ. 5)
At the EOC, the STATUS signal rises to HIGH and is latched.
The latch is not reset until a recharge cycle or a new charge
cycle starts. The tolerance guidance for the EOC current at
selected RIREF values are given in Table 3.
TABLE 3. EOC CURRENT vs RIREF VALUES.
EOC CURRENT (mA)
RIREF (kΩ)
267
MIN TYP MAX
15 30
60
160
30 50
80
100 40 80 120
88.9 45 90 135
11 FN9242.1
January 3, 2006
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet ISL9203R5220.PDF ] | |
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