MP2733 datasheet(22/51 Pages) MPSIND

22 / 51 page

MP2733

– 4.5A SW CHARGER WITH I2C CONTROL, NVDC POWER PATH, USB OTG

MP2733 Rev. 1.1

www.MonolithicPower.com

5/18/2023

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

During the charging process, the actual charge

current may be less than the register setting due

other

loop

regulations,

such

DPM

regulation (input current limit or input voltage

regulation loop) or thermal regulation. Thermal

regulation reduces the charge current such that

the IC junction temperature does not exceed the

preset

limit.

Multiple

thermal

regulation

thresholds (between 60°C and 120°C) help the

system design meet the thermal requirements

for

different

applications.

The

junction

temperature regulation threshold can be set via

REG02h, bits[3:2].

Auto-Recharge

When the battery is done charging, the battery

may be discharged due to system consumption

or self-discharge. When VBATT is discharged

below the recharge threshold after a 200ms

auto-recharge

deglitch

time,

the

MP2733

automatically begins another charging cycle.

--------

Control

--------

is a logic input pin that enables and disables

battery charging, or starts a new charging cycle.

Battery

charging

enabled

when

CHG_CONFIG (REG04h, bits[5:4]) is set to 01

and the CE

--------

pin is pulled to a low logic.

Battery Over-Voltage Protection (OVP)

The MP2733 is designed with built-in battery

over-voltage protection (OVP). If VBATT exceeds

103.5% of VBATT_REG, the MP2733 immediately

suspends charging and asserts a fault. If battery

OVP occurs, charging is disabled but the DC/DC

converter continues operating.

System Over-Voltage Protection (OVP)

The MP2733 monitors the voltage at the SYS pin.

If an over-voltage condition (VSYS > VBATT_REG +

0.4V) is detected, the DC/DC converter turns off,

and the system is powered by the battery via the

battery FET.

Automatic Input Current Optimizer (AICO)

The device provides an optimized input current

limit (IIN_LIM) without overloading the input source.

This function can be enabled or disabled by

configuring the AICO_EN bit (disabled by

default). If AICO is enabled, automatic input

current optimization (AICO) is triggered when

IIN_LIM is set to a larger current, and VIN drops to

VIN_MIN. This function decreases IIN_LIM step by

step until VIN exits VIN_MIN control. IIN_LIM remains

optimized and does not automatically run the

AICO function unless another VIN_MIN event

occurs.

The actual IIN_LIM is reported in the IIN_DPM register

when the AICO function is enabled (AICO_EN =

1). If the AICO function is disabled (AICO_EN =

0), IIN_LIM is set by the IIN_LIM register. Any write

to IIN_LIM can reset IIN_DPM to the same IIN_LIM

value as when the AICO function is enabled.

Input Source Type Detection

The MP2733 features input source detection

compatible

with

USB

Battery

Charging

Specification 1.2 (BC1.2) and nonstandard

adapters. The user can force DP/DM detection

in host mode by writing 1 to USB_DET_EN

(REG0Bh, bit[5]).

When VIN is first applied and a good input source

is detected, BC1.2 detection begins with data

content detection (DCD). If DCD is effective, the

standard downstream port (SDP), charging

downstream port (CDP), and dedicated charging

port (DCP) can be distinguished. If the 500ms

DCD timer expires, then the MP2733 proceeds

with nonstandard adapter detection.

DCD uses a current source to detect when the

data

pins

have

made

contact

during

attachment event. The protocol for DCD is

described below:

1. The

portable

device

(PD)

detects

VIN

assertion.

2. The PD turns on DP (IDP_SRC) and the DM

pull-down resistor.

3. The PD waits for the DP line to pull low.

4. If the DP line is detected to be low for 10ms,

the PD starts primary detection.

5. If data contact is not detected, the DCD timer

(about 500ms) expires.

After the DCD timer expires, the PD turns off

IDP_SRC and the DM pull-down resistor. Then the

50ms timer starts, and the PD can detect a

special adapter. If a special adapter is detected,

an INT signal is sent to the host. Otherwise, the

PD starts primary detection after the 50ms timer

expires.

MP2733 Datasheet(PDF) 22 Page - MPS Industries, Inc.

MP2733 Datasheet(HTML) 22 Page - MPS Industries, Inc.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Datasheet Download

Link URL