MCP73862-I/MLG Microchip Technology, MCP73862-I/MLG Datasheet - Page 16

• Manufacturer Part Number: MCP73862-I/MLG
• Description: IC CONTROLLER LI-ION 8.2V 16QFN
• Manufacturer: Microchip Technology

Specifications of MCP73862-I/MLG

• Function: Charge Management
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 8.7 V ~ 12 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QFN
• Output Voltage: 8.2 V, 8.4 V
• Output Current: 1200 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MCP73862-I/MLG; MCP73862-I/MLGR

MCP73861/2
5.1.6
The MCP7386X monitors the battery voltage at the
V
terminal of the battery pack.
5.1.7
The battery charge control output is the drain terminal
of an internal P-channel MOSFET. The MCP7386X
provides constant current and voltage regulation to the
battery pack by controlling this MOSFET in the linear
region. The battery charge control output should be
connected to the positive terminal of the battery pack.
5.2
5.2.1
Two status outputs provide information on the state of
charge. The current-limited, open-drain outputs can be
used to illuminate external LEDs. Optionally, a pull-up
resistor can be used on the output for communication
with a host microcontroller. Table 5-1 summarizes the
state of the status outputs during a charge cycle.
TABLE 5-1:
DS21893B-page 16
Qualification
Preconditioning
Constant-
Current Fast
Charge
Constant-
Voltage
Charge
Complete
Fault
THERM Invalid
Disabled –
Sleep mode
Input Voltage
Disconnected
BAT3
CYCLE STAT1
Note: Off state: Open-drain is high-impedance;
CHARGE
pin. This input is tied directly to the positive
Digital Circuitry
On state: Open-drain can sink current,
Flashing: Toggles between off state and
BATTERY VOLTAGE SENSE (V
BATTERY CHARGE CONTROL
OUTPUT (V
CHARGE STATUS OUTPUTS
(STAT1,STAT2)
STATUS OUTPUTS
50% duty cycle)
Flashing (1 Hz,
typically 7 mA;
on state.
STAT1
BAT1
Off
On
On
On
Off
Off
Off
Off
, V
BAT2
50% duty cycle)
Flashing (1 Hz,
)
STAT2
Off
Off
Off
Off
Off
On
Off
Off
BAT3
)
The flashing rate (1 Hz) is based off a timer capacitor
(C
value of the timer capacitor.
During a fault condition, the STAT1 status output will be
off and the STAT2 status output will be on. To recover
from a fault condition, the input voltage must be
removed and then reapplied, or the enable input (EN)
must be de-asserted to a logic-low, then asserted to a
logic-high.
When the voltage on the THERM input is outside the
preset window, the charge cycle will not start, or will be
suspended. The charge cycle is not terminated and
recovery is automatic. The charge cycle will resume or
start once the THERM input is valid and all other
qualification parameters are met. During an invalid
THERM condition, the STAT1 status output will be off
and the STAT2 status output will flash.
5.2.2
The V
the MCP7386X. With V
and MCP73862 regulate to 4.1V and 8.2V, respectively.
With V
regulate to 4.2V and 8.4V, respectively.
5.2.3
The logic enable input pin (EN) can be used to
terminate a charge at any time during the charge cycle,
as well as to initiate a charge cycle or initiate a recharge
cycle.
Applying a logic-high input signal to the EN pin, or tying
it to the input source, enables the device. Applying a
logic-low input signal disables the device and termi-
nates a charge cycle. When disabled, the device’s
supply current is reduced to 0.17 µA, typically.
TIMER
SET
SET
) of 0.1 µF. The rate will vary based on the
input selects the regulated output voltage of
tied to V
V
LOGIC ENABLE (EN)
SET
INPUT
DD
, the MCP73861 and MCP73862
SET
 2005 Microchip Technology Inc.
tied to V
SS
, the MCP73861