ISL6251 Datasheet, PDF (7/20 Pages) Intersil Corporation – Low Cost Multi-Chemistry Battery Charger Controller

ISL6251, ISL6251A
Typical Operating Performance DCIN=20V, 4S2P Li-Battery, T_A=25°C, unless otherwise noted. (Continued)
BATTERY
INSERTION
BATTERY
REMOVAL
INDUCTOR
CURRENT
2A/div
CSON
10V/div
VCOMP
ICOMP
VCOMP
2V/div
ICOMP
2V/div
FIGURE 7. BATTERY INSERTION AND REMOVAL
CHLIM=0.2V
CSON=8V
PHASE
10V/div
INDUCTOR
CURRENT
1A/div
UGATE
5V/div
FIGURE 8. SWITCHING WAVEFORMS AT DIODE EMULATION
PHASE
10V/div
UGATE
2V/div
LGATE
2V/div
FIGURE 9. SWITCHING WAVEFORMS IN CC MODE
CHARGE
CURRENT
1A/div
CHLIM
1V/div
FIGURE 10. TRICKLE TO FULL-SCALE CHARGING
7
FN9202.1
June 17, 2005