ISL6253 Datasheet, PDF (7/22 Pages) Intersil Corporation – Highly Integrated Battery Charger for Notebook Computers

ISL6253
Typical Operating Performance (Continued)
Circuit of Figure 18, VDCIN = 20V, 4S2P Li-Ion Battery, T_A = 25°C, unless otherwise noted.
EN
5V/DIV
INDUCTOR
CURRENT
2A/DIV
BATTERY
VOLTAGE
2V/DIV
t: 0.5ms/DIV
FIGURE 7. CHARGE ENABLE AND SHUTDOWN
SYSTEM BUS
VOLTAGE
5V/DIV
INDUCTOR
CURRENT
2A/DIV
BGATE-CSIP
B2GVA/DTIEV-CSIP
2V/div
SGATE-CSIP
2SVG/ADTIVE-CSIP
2V/dDiIvV
t: 0.5ms/DIV
FIGURE 8. AC ADAPTER INSERTION
BGATE-CSIP
2V/DIV
LOAD CURRENT = 2A
SYSTEM BUS
VOLTAGE
5V/DIV
SGATE-CSIP
2V/DIV
INDUCTOR
CURRENT
2A/DIV
t: 5µs/DIV
FIGURE 9. AC ADAPTER REMOVAL
VPHASE
10V/DIV
VCSON
10V/DIV
INDUCTOR
CURRENT
2A/DIV
t: 20µs/DIV
FIGURE 11. BATTERY REMOVAL
7
INDUCTOR
CURRENT
2A/DIV
BATTERY
VOLTAGE
10V/DIV
ICOMP
VCOMP
2V/DIV
t: 1ms/DIV
FIGURE 10. BATTERY INSERTION
BATTERY
VOLTAGE
2V/DIV
INDUCTOR
CURRENT
1A/DIV
CHARGE
CURRENT
1A/DIV
t: 0.1ms/DIV
FIGURE 12. CHARGE MODE TRANSITION FROM TRICKLE
MODE TO CONSTANT CURRENT MODE