ISL6251 INTERSIL [Intersil Corporation], ISL6251 Datasheet - Page 6

• Manufacturer Part Number: ISL6251
• Description: Low Cost Multi-Chemistry Battery Charger Controller
• Manufacturer: INTERSIL [Intersil Corporation]

Typical Operating Performance
FIGURE 3. ICM ACCURACY vs AC ADAPTER CURRENT
10
-0.3
-0.3
-0.6
-0.6
9
8
7
6
5
4
3
2
1
0
0.6
0.6
0.3
0.3
FIGURE 5. LOAD TRANSIENT RESPONSE
10 20 30 40 50 60 70 80 90 100
0
0
LOAD STEP: 0-4A
CHARGE CURRENT: 3A
AC ADAPTER CURRENT LIMIT: 5.15A
FIGURE 1. VDD LOAD REGULATION
0
0
8
8
LOAD CURRENT (mA)
LOAD CURRENT (mA)
CSIP-CSIN (mV)
16
16
6
24
24
VDD=5.075V
VDD=5.075V
EN=0
EN=0
32
32
DCIN=20V, 4S2P Li-Battery, T
BATTERY
VOLTAGE
2V/div
CHARGE
CURRENT
2A/div
LOAD
CURRENT
5A/div
ADAPTER
CURRENT
5A/div
ISL6251, ISL6251A
40
40
FIGURE 4. SYSTEM EFFICIENCY vs CHARGE CURRENT
A
=25°C, unless otherwise noted.
FIGURE 6. CHARGER ENABLE & SHUTDOWN
0.08
0.08
0.06
0.06
0.04
0.04
0.02
0.02
0 .9 6
0 .9 6
0 .9 2
0 .9 2
0 .8 8
0 .8 8
0 .8 4
0 .8 4
0 .76
0 .76
0.1
0.1
0 .8
0 .8
0
0
FIGURE 2. VREF LOAD REGULATION
1
1
0
0
0
0
0 .5
0 .5
100
100
LOAD CURRENT (µA)
LOAD CURRENT (µA)
1
1
VCSON=16.8V
VCSON=16.8V
4 CELLS
4 CELLS
CHARGE CURRENT (A)
CHARGE CURRENT (A)
1.5
1.5
VCSON=12.6V
VCSON=12.6V
(3 CELLS)
(3 CELLS)
200
200
2
2
VREF=2.390V
VREF=2.390V
2.5
2.5
300
300
VCSON=8.4V
VCSON=8.4V
2 CELLS
2 CELLS
3
3
3 .5
3 .5
CSON
CSON
5V/div
5V/div
INDUCTOR
INDUCTOR
CURRENT
CURRENT
2A/div
2A/div
CHARGE
CHARGE
CURRENT
CURRENT
2A/div
2A/div
EN
EN
5V/div
5V/div
June 17, 2005
400
400
4
4
FN9202.1