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ISL78693 PDF预览

ISL78693

更新时间: 2024-11-30 01:18:19
品牌 Logo 应用领域
英特矽尔 - INTERSIL /
页数 文件大小 规格书
18页 626K
描述
Reverse battery leakage 700nA

ISL78693 数据手册

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DATASHEET  
Automotive Single-Cell LiFePO Battery Charger  
4
ISL78693  
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.  
Features  
• Complete charger for single-cell Lithium chemistry batteries  
• Integrated power transistor and current sensor  
• Reverse battery leakage 700nA  
• 1% initial voltage accuracy  
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.  
• 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  
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.  
• 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  
Related Literature  
• For a full list of related documents, visit our website  
- ISL78693 product page  
• Backup battery systems  
CONSTANT  
CURRENT  
MODE  
CONSTANT  
VOLTAGE  
MODE  
TRICKLE  
MODE  
INHIBIT  
VIN  
INPUT VOLTAGE  
VCH  
BATTERY  
PACK  
ISL78693  
BATTERY VOLTAGE  
5V  
VIN  
V
BAT  
R
1
C
C1  
10µF  
2
R
100k  
VTRICKLE  
1
100k  
+
-
TEMP  
2x10µF  
FAULT  
STATUS  
EN  
R
1k  
1
V2P8  
IREF  
ICHARGE  
R
160k  
1
EN  
C3  
TIME  
GND  
1µF  
CHARGE CURRENT  
CTIME  
15nF  
I
CHARGE/10  
TIMEOUT  
FIGURE 2. TYPICAL CHARGE CURVES USING A CONSTANT  
VOLTAGE ADAPTER  
FIGURE 1. TYPICAL APPLICATION  
December 12, 2016  
FN8891.1  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2016. All Rights Reserved  
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.  
All other trademarks mentioned are the property of their respective owners.  
1

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