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

• Manufacturer Part Number: MCP73862-I/ML
• Description: IC CONTROLLER LI-ION 8.7V 16QFN
• Manufacturer: Microchip Technology

Specifications of MCP73862-I/ML

• 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
• Product: Charge Management
• Output Voltage: 8.442 V
• Output Current: 1200 mA
• Operating Supply Voltage: 8.7 V to 12 V
• Supply Current: 4 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Uvlo Start Threshold: 9.05 V
• Uvlo Stop Threshold: 8.95 V
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification

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, constant 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:
DS21893A-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 (1Hz,
typically 7 mA;
on state.
STAT1
BAT1
On
On
On
Off
Off
Off
Off
Off
, V
BAT2
50% duty cycle)
Flashing (1Hz,
)
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 qual-
ification 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, respec-
tively. With V
MCP73862 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
) of 0.1 µF. The rate will vary based on the
input selects the regulated output voltage of
V
LOGIC ENABLE (EN)
SET
SET
INPUT
tied to V
SET
 2004 Microchip Technology Inc.
tied to V
DD
, the MCP73861 and
SS
, the MCP73861