MP5030C

– USB CHARGING PORT CONTROLLER SUPPORTING CDP, DCP, AND QC3.0

MP5030C Rev. 1.01

www.MonolithicPower.com

13

9/28/2018

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© 2018 MPS. All Rights Reserved.

ΔVIN

0

2.4A

220mV

Figure 3: Line Drop Compensation

drop compensation amplitude increases linearly

as the load current increases.

In no-load condition, if the input voltage is lower

than 5V (typical), ADJ sinks a current to

regulate the upstream regulator's output voltage

to 5V. If the input voltage is higher than 5V

(typical), the MP5030C no longer regulates the

input voltage.

Input Over-Voltage and Discharge

To protect the downstream device from an

over-voltage condition, the MP5030C provides

an

input

over-voltage

protection

(OVP)

shutdown

function.

Since

the

MP5030C

supports the QC 3.0 protocol, it has a dynamic

OVP threshold.

An accurate and fast comparator monitors the

over-voltage condition of the input. If the input

voltage rises above the threshold, the gate of

the internal MOSFET is pulled low quickly, and

the

power

MOSFET

is

shut

down.

Simultaneously, the input-to-ground discharge

path is active. When the input voltage falls

below 5.4V (typical), the MP5030C exits OVP

mode.

The OVP shutdown function is blanked during

the high-to-low voltage mode change period.

The input-to-ground discharge resistance is

always active during the high-to-low voltage

mode change period. The discharge path is

turn-off when FB is lower than 108% times the

delay (see Figure 4).

t

V

Discharge

Enable

20ms

Figure 4: Input Discharge during High Voltage to

Low Voltage Transition

QC mode is reset during the OVP rising edge.

Over-Current Protection (OCP)

The MP5030C provides a constant current limit.

The current limit threshold is adjustable by an

external resistor.

Once the device reaches its current limit

threshold, the internal circuit regulates the gate

voltage to hold the current in the power

MOSFET constant.

limit threshold. If an over-current (OC) condition

MP5030C works at a constant current (CC) limit

mode without hiccup mode. If the OC is

the MP5030C enters hiccup mode. In hiccup

mode, the MP5030C turns off the power

MOSFET (see Figure 5).

<3.5V

Figure 5: Over-Current Protection