MAX8677AETG+ Maxim Integrated Products, MAX8677AETG+ Datasheet - Page 10

• Manufacturer Part Number: MAX8677AETG+
• Description: IC USB/AC ADP CHARGER 24-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX8677AETG+

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion)
• Voltage - Supply: 4.1 V ~ 6.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TQFN Exposed Pad
• Operating Supply Voltage: 4.1 V to 6.6 V
• Supply Current: 1 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Charge Safety Timers: Yes
• Mounting Style: SMD/SMT
• Temperature Monitoring: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
The MAX8677A contains an Li+ battery charger, as well
as power MOSFETs and control circuitry to manage
power flow in portable devices. See Figure 1. The
Figure 1. Block Diagram
10
LIMIT
USB
500mA
______________________________________________________________________________________
100mA
ADAPTER
USB
DC MODE
SUSPEND
AC
LIMIT
DC
USB
DC
DOK
USB
UOK
PEN1
PEN2
USUS
PSET
Circuit Description
PWR
PWR
OK
OK
MANAGEMENT
MANAGEMENT
CURRENT LIMIT
USB POWER
DC POWER
INPUT AND
SET LOGIC
CHARGER
REGULATOR
REGULATOR
CURRENT-
CURRENT-
VOLTAGE
VOLTAGE
LIMITED
LIMITED
INPUT
INPUT
LIMIT
LIMIT
SET
SET
MAX8677A
REGULATION
THERMAL
EP
IC
charger has two power inputs, DC and USB. These can
be separately connected to an AC adapter output and
a USB port, or the DC input can be a single power
input that connects to either an adapter or USB. Logic
inputs, PEN1 and PEN2, select the correct current limits
AND SYS LOAD SWITCH
(SEE FIGURE 7)
Li+ BATTERY CHARGER
AND MONITOR
TERMINATION
THERMISTOR
CURRENT-
CHARGER
CONTROL
MONITOR
VOLTAGE
CHARGE
CHARGE
TIMER
DONE
TSET
THM
CHG
GND
ISET
SYS
CEN
BAT
FLT
CT
VL
TO
SYSTEM
LOAD
VL = 15%
N.C. = 10%
5%
BAT+
BAT-
NTC
T