© Semiconductor Components Industries, LLC, 2017
November, 2017 − Rev. 0
1 Publication Order Number:
AND9681/D
AND9681/D
E-Cigarette Reference
Software Guidance for
LC709301F
3.5 W Solution
Overview
LC709301F is a Lithium ion switching charge/discharge controller
for 1−Cell Li−Ion Battery (LiB). This guidance describes about
reference software of LC709301F for E−Cigarette application. This
device has mainly functions for E−Cigarette including battery charge,
hearting and LED indicating. Our solution provides the following
values.
Features
• Advanced Safety
• Heating High Accuracy
• System Flexibility
Characteristic
• 3.0 W to 4.0 W Heating Solution
• Real Time Feedback Heating with Monitoring Voltage and
Current of Heater
• Multiple Safety Using Controller (LC709301F) and LiB
Protection IC
• Low Power Consumption at Standby
Applications
• E−Cigarette
• Charging/Discharging Application used Li−Ion Battery
www.onsemi.com
APPLICATION NOTE
VCT24 3.5x3.5, 0.5P
CASE 601AD
AND9681/D
www.onsemi.com
2
SOFTWARE SPEC. E−CIGARETTE BASE PROGRAM
Table 1.
Characteristic Description
MCU LC709301F @ Internal 8 MHz
Developer ON Semiconductor
Circuit See page 3
Development Environment Tasking C Compiler Ver.dlc87 3.2.r2
TCB87−Type C (On Chip Debugger)
Document Main Flow See page 7
Port assign See page 5
Mode transition See page 6
Use Battery Maker: Joysun New Energy
Model: Joysun08450
Type: Li−ion polymer
Charging and Discharging Specification Charging voltage upper limit: 4.17 V
Full−charge detection voltage: 4.0 V − 4.2 V
Full−charge detection current: Less than 40 mA (2 s)
Charging current: 190 mA 10−bit PWM 39 kHz Base cycle
Charging time−out: 180 min
Pre−charge voltage threshold: Less than 3.0 V
Pre−charge current: 6 mA 15 min
Abnormal temperature detection 58°C
Discharge current: 3.5 W 10−bit PWM 7.8 kHz
Discharge voltage: 3.27 V and over
Discharge time−out: 5 s
LED Indicator Specification See Table 2
USB (+5 V) Detection When 4.5 V to 5.5 V is input to the USB terminal, the USB connection is detected.
Table 2. LED INDICATOR SPECIFICATION
P12 BLUE P05 GREEN P06 RED Function Puff Count
0 0 0
0 0 1 Heater
0 1 0 Charging 150
0 1 1 100
1 0 0 250 over
1 0 1 50
1 1 0 200
1 1 1