MAX8819BETI+T Maxim Integrated Products, MAX8819BETI+T Datasheet - Page 17

• Manufacturer Part Number: MAX8819BETI+T
• Description: IC PMIC W/INT CHARGER 28-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX8819BETI+T

• Applications: Handheld/Mobile Devices
• Voltage - Supply: 2.6 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Figure 2 shows the typical Li+/Li-Poly charge profile for
the MAX8819_, and Figure 3 shows the battery charger
state diagram.
With a valid DC input that is not suspended, the battery
charger initiates a charge cycle once CEN is driven
high. It first detects the battery voltage. If the battery
Figure 2. Li+/Li-Poly Charge Profile
IMPEDANCE
I
I
CHGMAX
V
V
PREQUAL
I
BATREG
BATPRQ
TOPOFF
PMIC with Integrated Chargers and Smart
HIGH
LOW
0
______________________________________________________________________________________
PREQUALIFICATION
Power Selector in a 4mm x 4mm TQFN
Battery Charger
(CONSTANT CURRENT)
FAST-CHARGE
voltage is less than the prequalification threshold
(3.0V), the charger enters prequalification mode and
charges the battery at 10% of the maximum fast-charge
current while deeply discharged. Once the battery volt-
age rises to 3.0V, the charger transitions to fast-charge
mode and applies the maximum charge current. As
charging continues, the battery voltage rises until it
approaches the battery regulation voltage (4.2V typ)
(CONSTANT VOLTAGE)
FAST-CHARGE
TOP-OFF
DONE
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