ISL6294IRZ-T Intersil, ISL6294IRZ-T Datasheet - Page 5

• Manufacturer Part Number: ISL6294IRZ-T
• Description: IC CHARGER LI-ION SGL 2X3 8DFN
• Manufacturer: Intersil
• Series: -r

Specifications of ISL6294IRZ-T

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 4.5 V ~ 6.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-VFDFN Exposed Pad
• Battery Chemistry: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ISL6294IRZ-TR

Description
The ISL6294 charges a Li-ion battery using a CC/CV profile.
The constant current I
R
4.2V. If the battery voltage is below a typical 2.55V trickle-
charge threshold, the ISL6294 charges the battery with a
trickle current of 19% of I
above the trickle charge threshold. Fast charge CC mode is
maintained at the rate determined by programming I
the cell voltage rises to 4.2V. When the battery voltage
IREF
GND
PPR
VIN
(See Figure 1) and the constant voltage is fixed at
EN
POR
REF
19%I
REF
is set with the external resistor
2.55V
CHG
4.2V
I
REF
REF
until the battery voltage rises
5
PRE
REG
TRICKLE
200k
CHG
V
VCC
REF
FIGURE 4. TYPICAL CHARGE PROFILE
V
OS
CC
FIGURE 3. BLOCK DIAGRAM
REF
until
ISL6294
BAT
INDICATION
I
MIN
reaches 4.2V, the charger enters a CV mode and regulates
the battery voltage at 4.2V to fully charge the battery without
the risk of over charge. Upon reaching an end-of-charge
(EOC) current, the charger indicates the charge completion
with the CHG pin, but the charger continues to output the
4.2V voltage. Figure 4 shows the typical charge waveforms
after the power is on.
The EOC current level I
external resistor R
CHG
CHARGE
CURRENT
CONTROL
CHARGE
IMIN
VOLTAGE
CHARGE
CV
IREF
IMIN
EN
(See Figure 1). The CHG signal turns
MIN
VCC
is programmable with the
76%I REF
TIME
V
+115°C
REF
DIE
TEMP
BAT
July 9, 2007
FN9174.4