DATASHEET
ISL78692
Li-ion/Li-Polymer Battery Charger
The
ISL78692
is an integrated single-cell Li-ion or Li-polymer
battery charger capable of operating with an input voltage
as low as 2.65V (cold crank case). This charger is designed to
work with various types of AC adapters or a USB port.
The ISL78692 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 1A. The
ISL78692 can also work with a current-limited adapter to
minimize the thermal dissipation.
The ISL78692 features charge current thermal foldback to
guarantee safe operation when the printed circuit board’s
thermal dissipation is limited due to space constraints.
Additional features include preconditioning of an
over-discharged battery, an NTC thermistor interface for
charging the battery in a safe temperature range and
automatic recharge. The device is specified for operation in
ambient temperatures from -40°C to +85°C and is offered in
a 3x3mm thermally enhanced DFN package.
FN8692
Rev.1.00
Mar 29, 2017
Features
• Complete charger for single-cell Lithium chemistry batteries
• Integrated power transistor and current sensor
• Reverse battery leakage 700nA
• 1% initial voltage accuracy
• Programmable CC current up to 1A
• Charge current thermal foldback
• NTC thermistor interface for battery temperature alert
• Accepts CV and CC types of adapters or USB bus power
• Preconditioning trickle charge
• Guaranteed to operate down to 2.65V after start-up
• Ambient temperature range: -40°C to +85°C
•
AEC-Q100
qualified
Applications
• Automotive systems
• eCall systems
• Backup battery systems
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”
•
UG001,
“ISL78692EVAL1Z Evaluation Board User Guide”
TRICKLE
MODE
BATTERY
PACK
V
BAT
TEMP
V2P8
IREF
GND
R
1
160k
R
1
1k
C
2
2x10µF
+
-
CONSTANT
CURRENT
MODE
CONSTANT
VOLTAGE
MODE
INHIBIT
ISL78692
5V
C1
10µF
R
1
100k
R
1
100k
VIN
FAULT
STATUS
EN
EN
TIME
CTIME
15nF
V
IN
V
CH
INPUT VOLTAGE
BATTERY VOLTAGE
V
TRICKLE
C3
1µF
I
CHARGE
CHARGE CURRENT
I
CHARGE
/10
TIMEOUT
FIGURE 1. TYPICAL APPLICATION
FIGURE 2. TYPICAL CHARGE CURVES USING A CONSTANT
VOLTAGE ADAPTER
FN8692 Rev.1.00
Mar 29, 2017
Page 1 of 18
ISL78692
Block Diagram
V
IN
C
1
TEMPERATURE
MONITORING
Q
SEN
100000:1
CURRENT
MIRROR
I
SEN
INPUT_OK
+
-
IREF
R
IREF
+
I
R
-
CURRENT
REFERENCES
I
MIN
CHRG
+
-
V
CH
-
+
V
POR
+
100mV
-
V
POR
V
MIN
V
CH
Q
MAIN
V
BAT
REFERENCES
V2P8
I
T
V
RECHRG
V
IN
V
BAT
+
TRICKLE/FAST
I
SEN
+
-
V2P8
UNDER-
TEMPERATURE
NTC
INTERFACE
BATT REMOVAL
FAULT
V2P8
TIME
GND
OSC
COUNTER
INPUT_OK
EN
FAULT
OVER-
TEMPERATURE
RECHARGE
LOGIC
STATUS
MIN_I
+
-
STATUS
V
RECHRG
MINBAT
-
V
MIN
TEMP
TABLE 1. KEY DIFFERENCES BETWEEN FAMILY OF PARTS
PART NUMBER
ISL78692
ISL78693
OUTPUT
VOLTAGE (V)
4.1
3.65
RECHARGE
THRESHOLD (V)
3.9
3.25
TRICKLE CHARGE
THRESHOLD (V)
2.8
2.6
FN8692 Rev.1.00
Mar 29, 2017
Page 2 of 18
10UF
C6
J1
1
2
UNNAMED_1_AMP6448032_I352_IN2
220
R1
10K
1
1
VIN
FAULT
STATUS
TIME
GND
EPAD
VBAT
TEMP
IREF
V2P8
EN
10
9
8
7
6
DNP
R3
3
18000PF
0.015UF
UNNAMED_1_AMP2923041_I351_IN1
2
1
ISL78692-1CR3Z
4.99K
158K
R10
R7
R9
R11
TP7
499
R6
TP6
18.2K
200K
2
J3
1
0.01UF
C10
5
MOUNT
MOUNT
3
4
SW1
1
2
3
4
5
6
7
8
TIME
EN
500MA
400MA
NA
TEMP
TEMP
TEMP
SW1
UNNAMED_1_SDA08HX_I326_PIN16
UNNAMED_1_SDA08HX_I326_PIN14
UNNAMED_1_SDA08HX_I326_PIN13
UNNAMED_1_SDA08HX_I326_PIN11
UNNAMED_1_SDA08HX_I326_PIN10
UNNAMED_1_SDA08HX_I326_PIN9
3
4
6
1UF
C5
C3
C4
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
FIGURE 3. ISL78692EVAL1Z SCHEMATIC
8
FN8692 Rev.1.00
Mar 29, 2017
Page 3 of 18
ISL78692
UNNAMED_1_SMLED_I292_B
VBAT
TP3
C7
220
C9
OPEN
C2
10UF
C8
TP4
C1
1UF
U1
OPEN
10UF
JP2
OUTPUT
J2
D2
1
2
3
UNNAMED_1_AMP6448033
VIN
TP1
GND2
1
2
3
UNNAMED_1_SMLED_I291_B
GND1
TP2
R4
TP9
TP10
1
2
FAULT
JP1
2
3
4
5
11
TEMP
IREF
V2P8
EN
TP8
2
STATUS
TIME
TP5
JP3
D1
R2
1
2
JP4
3
JP4
1,2 USB 500MA
2,3 USB 100MA
ISL78692
Pin Configuration
ISL78692
(10 LD 3x3 DFN)
TOP VIEW
VIN
FAULT
STATUS
TIME
GND
1
2
3
4
5
10 VBAT
9
8
7
6
TEMP
IREF
V2P8
EN
Pin Descriptions
PIN #
1
2
3
4
5
6
7
8
9
10
VIN
FAULT
STATUS
TIME
GND
EN
V2P8
IREF
TEMP
VBAT
EPAD
PIN NAME
VIN is the input power source.
FAULT is an open-drain output indicating fault status. This pin is pulled to LOW under any fault
conditions.
STATUS is an open-drain output indicating charging and inhibit states. The STATUS pin is pulled LOW
when the charger is charging a battery.
The TIME pin determines the oscillation period by connecting a timing capacitor between this pin and
GND. The oscillator also provides a time reference for the charger.
GND is the connection to system ground.
EN is the enable logic input. Connect the EN pin to LOW to disable the charger or leave it floating to
enable the charger.
The V2P8 is a 2.8V reference voltage output. The 2.8V is present when VIN is above 3.4V typical. If VIN
falls below 2.4V typical the V2P8 output will be at 0V.
This is the programming input for the constant charging current.
TEMP is the input for an external NTC thermistor. The TEMP pin is also used for battery removal
detection.
VBAT is the connection to the battery.
The metal slug on the bottom surface of the package is floating. Tie to system GND.
DESCRIPTION
Ordering Information
PART NUMBER
(Notes
1, 2, 3)
ISL78692-1CR3Z
ISL78692EVAL1Z
8692
PART
MARKING
TEMP RANGE
(°C)
-40 to +85
PACKAGE
(Pb-Free)
10 Ld 3x3 DFN
L10.3x3
PKG
DWG
Evaluation Board for the 3x3 DFN Package Part
NOTE:
1. Add “-T” suffix for 6k unit or “-T7A” suffix for 250 unit tape and reel options. Refer to
TB347
for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC
J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for
ISL78692.
For more information on MSL, see Technical Brief
TB363.
FN8692 Rev.1.00
Mar 29, 2017
Page 4 of 18
ISL78692
Absolute Maximum Ratings
Supply Voltage (VIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to 7.0V
Output Pin Voltage (VBAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to 5.5V
Output Pin Voltage (V2P8). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to 3.2V
Signal Input Voltage (EN, TIME, IREF, TEMP). . . . . . . . . . . . . . .-0.3V to 3.2V
Output Pin Voltage (STATUS, FAULT). . . . . . . . . . . . . . . . . . . . . .-0.3V to 7.0V
Charge Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6A
ESD Rating:
Human Body Model (Tested per AEC-Q100-002). . . . . . . . . . . . . . . . . . 4kV
Charge Device Model (Tested per AEC-Q100-011) . . . . . . . . . . . . . 1.25kV
Latch-up (Per JESD78D; Class 2, Level A, AEC-Q100-004) . . . . . . . . 100mA
Thermal Information
Thermal Resistance (Typical)
JA
(°C/W)
JC
(°C/W)
3x3 DFN Package (Notes
4, 5)
. . . . . . . . . .
46
4
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see
TB493
Recommended Operating Conditions
Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Supply Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..4.3V to 5.5V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4.
JA
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief
TB379.
5.
JC
, “case temperature” location is at the center of the exposed metal pad on the package underside. See Tech Brief
TB379.
Electrical Specifications
Typical values are tested at V
IN
= 5V and at an Ambient Temperature of +25°C. Unless otherwise noted.
Boldface limits apply across the operating temperature range, -40°C to +85°C and V
IN
range of 4.3V to 5.5V (see
Note 6).
PARAMETER
POWER-ON RESET
Rising V
IN
Threshold
Falling V
IN
Threshold
STANDBY CURRENT
VBAT Pin Leakage
VIN Pin Standby Current
VIN Pin Quiescent Current
VOLTAGE REGULATION
Output Voltage
Dropout Voltage
CHARGE CURRENT
Constant Charge Current (Note
8)
Trickle Charge Current
Constant Charge Current (Note
8)
Trickle Charge Current
Constant Charge Current (Note
8)
Trickle Charge Current
End-of-Charge Current
RECHARGE THRESHOLD
Recharge Voltage Falling Threshold
TRICKLE CHARGE THRESHOLD
Trickle Charge Threshold Voltage
V
TRICKLE
2.7
2.8
3.0
V
V
RECHRG
3.7
3.9
4.05
V
I
CHARGE
I
TRICKLE
I
CHARGE
I
TRICKLE
I
CHARGE
I
TRICKLE
I
EOC
R
IREF
= 160kΩ, V
BAT
= 3.7V
R
IREF
= 160kΩ, V
BAT
= 2.4V
IREF pin voltage > 1.2V, V
BAT
= 3.7V
IREF pin voltage > 1.2V, V
BAT
= 2.4V
IREF pin voltage < 0.4V, V
BAT
= 3.7V
IREF pin voltage < 0.4V, V
BAT
= 2.4V
35
65
390
430
500
55
450
45
80
10
60
100
104
540
570
mA
mA
mA
mA
mA
mA
mA
V
CH
V
DO
V
BAT
OPEN
V
BAT
= 3.7V, I
IN
= 500mA
4.015
4.10
270
4.185
450
V
mV
I
VBLKG
I
INSBY
I
Q
V
BAT
= 5.5V, V
IN
= 0V, EN = 0.8V
V
BAT
OPEN, V
IN
= 5.0V, EN = 0.8V
V
BAT
OPEN, V
IN
= 5.5V, EN FLOAT
0.7
30
1
3.0
200
µA
µA
mA
3.0
2.11
3.4
2.4
4.0
2.65
V
V
SYMBOL
TEST CONDITIONS
MIN
(Note
6)
TYP
MAX
(Note
6)
UNITS
FN8692 Rev.1.00
Mar 29, 2017
Page 5 of 18
单片机
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
