MP6513 – 2.5V - 21V, 0.8A, H-BRIDGE MOTOR DRIVER IN A TSOT23-6
MP6513 Rev. 1.0 www.MonolithicPower.com 10
3/23/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
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)
L L Z Z Coast
L H L H Reverse
H L H L Forward
H H L L 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. To ensure that the junction
temperature is within this limit, calculate the
maximum allowable dissipation (P
D(MAX)
) with
Equation (1):
P
D(MAX)
= (T
J
(max) - T
A
) / θ
JA
(1)
Where T
J
(max) is the maximum recommended
operation junction temperature (125°C), θ
JA
is
the junction-to-ambient thermal resistance, and
T
A
is the ambient temperature (see Table 2).
Table 2: Dissipation Ratings
Package
θ
JA
(°C/W)
Dissipation Power Rating
T
A
= 25°C T
A
= 50°C T
A
= 85°C
TSOT23-6 110 0.9W 0.65W 0.35W
