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PDF ISL9203A Data sheet ( Hoja de datos )
| Número de pieza | ISL9203A | |
| Descripción | Li-ion/Li Polymer Battery Charger | |
| Fabricantes | Intersil Corporation | |
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Data Sheet
February 14, 2007
ISL9203A
FN6430.0
Li-ion/Li Polymer Battery Charger
The ISL9203A 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 ISL9203A 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 ISL9203A can also work with a current-limited
adapter to minimize the thermal dissipation, in which case
the ISL9203A combines the benefits of both a linear charger
and a pulse charger.
The ISL9203A 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.
Typical Application Circuit
5V
INPUT
VIN
C1
VBAT
R1 ISL9203A
FLOATING
TO ENABLE
VSEN
STATUS
EN
V2P8
IREF
TIME GND
CTIME
C2
C3
R IREF
Ordering Information
PART NUMBER PART
(Note)
MARKING
TEMP.
RANGE
(°C)
PACKAGE PKG
(Pb-free) DWG. #
ISL9203ACRZ 03ACZ
-20 to +70 10 Ld 3x3 DFN L10.3x3
ISL9203ACRZ-T 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.
Features
• 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
• Handheld Devices including Medical Handhelds
• 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”
Pinout
ISL9203A
(10 LD 3x3 DFN)
TOP VIEW
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. 2007. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL9203A
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 6.4
VIN (V)
FIGURE 14. INPUT QUIESCENT CURRENT vs INPUT
VOLTAGE WHEN NOT SHUTDOWN
FN6430.0
February 14, 2007
5 Page 
ISL9203A
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
VRECHRG
2.8V VMIN
ICHARGE
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=
---0---.--8----V----- × 105(A)
RIREF
(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 ISL9203A, the EOC current is
internally set to 1/10 of the CC charge current, that is:
IMIN=
--1----
10
⋅
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
160
100
88.9
80
MIN TYP MAX
15 30
60
30 50
80
40 80 120
45 90 135
70 100 150
NOTE: The values in table 3 are not tested and are only for guidance
in selecting resistor values for mass production tests or in customer’s
products.
11 FN6430.0
February 14, 2007
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet ISL9203A.PDF ] | |
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