MP2624GL datasheet(24/45 Pages) MPS

24 / 45 page

MP2624 – 4.5A SW CHARGER W/ I2C CONTROL, NVDC POWER PATH, USB OTG

MP2624 Rev.1.05

www.MonolithicPower.com

4/9/2018

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

When the detection algorithm is complete, the

DP and DM signal lines enter a high-Z (HZ) state

with an approximate 4pF capacitive load.

Input Current Limit Setting via ILIM

For safe operation, the MP2624 has an additional

hardware pin (ILIM) to adjust the maximum input

current limit. It can be set by a resistor connected

from ILIM to GND. The actual input current limit is

the lower value between the ILIM setting and the

Interrupt to Host (INT)

The MP2624 has an alert mechanism, which can

output an interrupt signal via INT to notify the

system of the operation by outputting a 256μs

low state INT pulse. All of the events below

trigger the INT output:



Good input source detected



USB detection completed



UVLO



Charge completed



Any fault in REG09 (Watchdog timer

fault, OTG fault, thermal fault, safety

timer fault, battery OVP fault, and NTC

fault)

When a fault occurs, the charger device sends

out an INT signal and latches the fault state in

REG09 until the host reads the fault register.

Before the host reads REG09, the charger device

will not send a new INT signal upon new faults

except for NTC faults. The NTC fault is not

latched and always reports the current thermistor

conditions.

In order to read the current fault status, the host

has to read REG09 two times consecutively. The

1st reads the fault register status from the last INT,

and the 2nd reads the current fault register status.

Safety Timer

The MP2624 provides both a pre-charge and

complete charge safety timer to prevent an

extended charging cycle due to abnormal battery

conditions. The total safety timer for both trickle

charge and pre-charge is 1 hour when the battery

voltage is lower than VBATT_PRE. The complete

charge safety timer starts when the battery

enters constant-current charge. The constant-

current charge safety timer can be programmed

by I2C. The safety timer feature can be disabled

via I2C. The safety timer does not operate in USB

OTG mode.

The safety timer is reset at the beginning of a

new charging cycle. Also, it can be reset by

toggling CE

--------

or write 00 and 01 sequentially to the

REG01 Bit [5:4]. The following actions restart the

safety timer:



A new charge cycle has begun.



Toggling CE

--------

from low to high to low

(charge enable)



Write REG01 Bit [5:4] from 00 to 01

(charge enable)



Write REG05 Bit [3] from 0 to 1 (safety

timer enable)



Write REG01 Bit [7] from 0 to 1

(software reset)

The timer can be refreshed after timer out when

one of the following thing happens:



The input power reset.



Toggling CE

--------

from low to high to low (charge

enable).



Writing REG01 Bit[5:4] from 00 to 01 (charge

enable).

MP2624 adjusts automatically or suspends the

timer when a fault occurs.

The timer is suspended during the conditions

below:



The battery is discharging



System OVP occurs



NTC hot or cold fault

If the input current limit, input voltage regulation,

or thermal regulation threshold is reached, the

rest of the timer is doubled by enable the 2X

timer in PPM function (REG07H Bit[6]=1). Once

the PPM operation is removed, the rest of the

timer returns to the original setting. This setting

may cause an application issue, if the IC

operates in and out of PPM frequently, the single

timer period will be divided, which causes false

timer out termination. The solution is to disable

the 2X timer function by set REG07H Bit[6] to 0.

MP2624GL 数据表(PDF) 24 Page - Monolithic Power Systems

MP2624GL 数据表(HTML) 24 Page - Monolithic Power Systems

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MP2624GL 数据表(PDF) 24 Page - Monolithic Power Systems

MP2624GL 数据表(HTML) 24 Page - Monolithic Power Systems

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