ISL78693 Datasheet, PDF (1/18 Pages) Intersil Corporation – Reverse battery leakage 700nA

DATASHEET
Automotive Single-Cell LiFePO₄ Battery Charger
ISL78693
Features
The ISL78693 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 ISL78693 operates as a linear charger when the AC
adapter is a voltage source. The battery is charged in a
Constant Current/Constant Voltage (CC/CV) profile. The charge
current is programmable with an external resistor up to 1A.
The ISL78693 can also work with a current-limited adapter to
minimize the thermal dissipation.
• 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
The ISL78693 features charge current thermal foldback to
ensure 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.
Related Literature
• 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
• For a full list of related documents, visit our website
- ISL78693 product page
5V
C1
10µF
EN
R₁
100k
ISL78693
R₁
100k
VIN
FAULT
V_BAT
TEMP
STATUS
V2P8
EN
IREF
CTIME
15nF
TIME
GND
R₁
160k
R₁
1k
C3
1µF
BATTERY
PACK
C₂
2x10µF
+
-
FIGURE 1. TYPICAL APPLICATION
TRICKLE
MODE
CONSTANT
CURRENT
MODE
V_IN
INPUT VOLTAGE
V_CH
V_TRICKLE
CONSTANT
VOLTAGE
MODE
INHIBIT
BATTERY VOLTAGE
I_CHARGE
CHARGE CURRENT
I_CHARGE/10
TIMEOUT
FIGURE 2. TYPICAL CHARGE CURVES USING A CONSTANT
VOLTAGE ADAPTER
‘
December 12, 2016
1
FN8891.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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