ISL6253HAZ Intersil, ISL6253HAZ Datasheet - Page 8

• Manufacturer Part Number: ISL6253HAZ
• Description: IC CTRLR BATTERY CHARGER 28QSOP
• Manufacturer: Intersil

Specifications of ISL6253HAZ

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 7 V ~ 25 V
• Operating Temperature: -10°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP (0.150", 3.95mm Width)
• Rohs Compliant: YES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Typical Operating Performance
Circuit of Figure 18, VDCIN = 20V, 4S2P Li-Ion Battery, T
Functional Pin Descriptions
BOOT
Connect BOOT to a 0.1µF ceramic capacitor to the PHASE
pin and connect to the cathode of the bootstrap Schottky
diode.
UGATE
UGATE is the high side MOSFET gate drive output.
SGATE
SGATE is the AC adapter power source select output. The
SGATE pin drives an external P-MOSFET used to switch to
AC adapter as the system power source.
FIGURE 13. SWITCHING WAVEFORMS AT CONSTANT
10V/DIV
PHASE
UGATE
LGATE
2V/DIV
UGATE
UGATE
CHARGE CURRENT MODE
VDCIN=20V
VCSON=16.8V
VDCIN = 20V
VCSON = 16.8V
t: 100ns/DIV
8
LGATE
LGATE
FIGURE 15. EFFICIENCY vs CHARGE CURRENT
0.96
0.92
0.88
0.84
0.76
0.8
1
(Continued)
0
A
0.5
= 25°C, unless otherwise noted.
VCSON = 16.8V
4 CELLS
1
ISL6253
CHARGE CURRENT (A)
VCSON = 12.6V
3 CELLS
1.5
2
BGATE
BGATE power source select output. This pin drives an
external P-channel MOSFET used to switch the battery as
the system power source. When the voltage at the CSON
pin is higher than the AC adapter output voltage at DCIN,
BGATE is driven to low and selects the battery as the power
source.
LGATE
LGATE is the low side MOSFET gate drive output; swing
between PGND and VDDP.
INDUCTOR
CURRENT
CURRENT
FIGURE 14. SWITCHING WAVEFORMS AT TRICKLE CHARGE
CHARGE
0.5A/DIV
0.2A/DIV
10V/DIV
PHASE
2.5
VCSON = 8.4V
2 CELLS
3
MODE
3.5
4
1µs/DIV