MP6513 datasheet(10/11 Pages) MPS

10 / 11 page

MP6513 – 2.5V - 21V, 0.8A, H-BRIDGE MOTOR DRIVER IN A TSOT23-6

MP6513 Rev. 1.0

www.MonolithicPower.com

3/23/2016

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

OPERATION

The MP6513 is an H-bridge motor driver used

for driving reversible motors, which can drive

one DC motor, one winding of a stepper motor,

or other loads. The H-bridge consists of four N-

channel power MOSFETs. An internal charge

pump generates the necessary gate-drive

voltages.

Input Logic

The MP6513 is controlled by two input pins.

The two on/off inputs control the output mode:

forward, reverse, coast, or brake. Table 1

shows the logic for the MP6513.

Table 1: Input Logic Truth Table

IN1

IN2

OUT1

OUT2

Function

(DC Motor)

Coast

Reverse

Forward

Brake

Sleep Mode

If the input pins (IN1 and IN2) both remain at a

low level within a certain time, the part enters a

low-power sleep mode. In this state, all

unnecessary internal circuitries are powered

down.

Over-Current Protection (OCP)

The MP6513 has internal overload and short-

circuit protection. The currents in both the high-

side and low-side MOSFETs are measured. If

the current exceeds the current limit, all

MOSFETs in the H-bridge are turned off. The

bridge is re-enabled after approximately 1ms

automatically.

Thermal Shutdown (TSD)

Thermal monitoring is integrated into the

MP6513. If the die temperature rises above

160°C, all switches are turned off. Once the die

temperature has fallen back to a safe level,

operation resumes automatically.

Under-Voltage Lockout (UVLO)

If at any time the voltage on VCC falls below

the under-voltage lockout threshold voltage, all

circuitries in the device are disabled, and the

internal logic is reset. Operation resumes when

VCC rises above the UVLO threshold.

Power

Dissipation

and

Recommended

Junction Temperature

The

recommended

maximum

junction

temperature is 125°C under normal operating

conditions.

ensure

that

the

junction

temperature is within this limit, calculate the

maximum allowable dissipation (PD(MAX)) with

Equation (1):

PD(MAX) = (TJ(max) - TA) / θJA

(1)

Where TJ(max) is the maximum recommended

operation junction temperature (125°C), θJA is

the junction-to-ambient thermal resistance, and

TA is the ambient temperature (see Table 2).

Table 2: Dissipation Ratings

Package

θJA

(°C/W)

Dissipation Power Rating

TA = 25°C TA = 50°C TA = 85°C

TSOT23-6 110

0.9W

0.65W

0.35W

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