MPC17510 Motorola, MPC17510 Datasheet - Page 8

• Manufacturer Part Number: MPC17510
• Description: 1.2 A 15 V H-Bridge Motor Driver IC
• Manufacturer: Motorola

small DC motors used in portable electronics. The 17510 can
operate efficiently with supply voltages as low as 2.0 V to as
high as 15 V, and it can provide continuos motor drive currents
of 1.2 A while handling peak currents up to 3.8 A. It is easily
interfaced to low-cost MCUs via parallel 5.0 V-compatible logic.
The device can be pulse width modulated (PWM-ed) at up to
200 kHz. The 17510 has four operating modes: Forward,
Reverse, Brake, and Tri-Stated (High Impedance).
braking, PWM control of speed and torque, main power supply
undervoltage detection and shutdown, logic power supply
undervoltage detection and shutdown), in addition to the 1.0 A
rms output current capability, make the 17510 a very attractive,
cost-effective solution for controlling a broad range of small DC
motors. In addition, a pair of 17510 devices can be used to
control bipolar stepper motors. The 17510 can also be used to
excite transformer primary windings with a switched square
wave to produce secondary winding AC currents.
OUT1 and OUT2
internal power MOSFET H-Bridge of the IC. A typical load
connected between these terminals would be a small DC motor.
These outputs will connect to either VM or PGND, depending
on the states of the control inputs (refer to
page 7).
PGND and LGND
should be connected together with a very low-impedance
connection.
C
reservoir capacitor (output of the charge pump). Alternatively
this terminal can also be used as an input to supply gate-drive
voltage from an external source via a series current-limiting
resistor. The voltage at the C
three times the V
utilizes a voltage tripler circuit. The
the IC to supply gate drive for the internal power MOSFET
H-Bridge.
VM
into the power sections of the IC. This supply then becomes
controlled and/or modulated by the IC as it delivers the power
to the load attached between OUT1 and OUT2. All VM
17510
8
RES
The 17510 is a monolithic H-Bridge power IC applicable to
Basic protection and operational features (direction, dynamic
The OUT1 and OUT2 terminals provide the connection to the
The power and logic ground terminals (PGND and LGND)
The C
The VM terminals carry the main supply voltage and current
RES
terminal provides the connection for the external
DD
voltage, as the internal charge pump
RES
terminal will be approximately
V C
SYSTEM/APPLICATION INFORMATION
RES
For More Information On This Product,
Table 1, Truth
FUNCTIONAL TERMINAL DESCRIPTION
voltage is used by
Table,
INTRODUCTION
Diagram, page 2, the 17510 is a monolithic H-Bridge with built-
in charge pump circuitry. For a DC motor to run, the input
conditions need to be set as follows: ENable input logic HIGH,
one INput logic LOW, and the other INput logic HIGH (to define
output polarity). The 17510 can execute dynamic braking by
setting both IN1 and IN2 logic HIGH, causing both low-side
MOSFETs in the output H-Bridge to turn ON. Dynamic braking
can also implemented by taking the ENable logic LOW. The
output of the H-Bridge can be set to an open-circuit high-
impedance (Z) condition by taking both IN1 and IN2 logic LOW.
(refer to
load current of up to 1.2 A. An internal charge pump supports
PWM frequencies to 200 kHz. The EN terminal also controls the
charge pump, turning it off when EN = LOW, thus allowing the
17510 to be placed in a power-conserving sleep mode.
terminals must be connected together on the printed circuit
board with as short as possible traces offering as low
impedance as possible between terminals.
drops below the undervoltage threshold, the output power
stage switches to a tri-state condition. When the supply voltage
returns to a level that is above the threshold, the power stage
automatically resumes normal operation according to the
established condition of the input terminals.
IN1, IN2, and EN
used to control the outputs. These terminals are 5.0 V CMOS-
compatible inputs with hysteresis. The IN1, IN2, and EN work
together to control OUT1 and OUT2 (refer to
Table).
GIN
logic LOW, GOUT supplies a level-shifted high-side gate drive
signal to an external MOSFET. When
GOUT is set to GND potential.
C1L and C1H, C2L and C2H
and C2H, connect to the external bucket capacitors required by
the internal charge pump. The typical value for the bucket
capacitors is 0.1 µF.
As shown in
The 17510 outputs are capable of providing a continuous DC
VM has an undervoltage threshold. If the supply voltage
The IN1, IN2, and EN terminals are input control terminals
The
These two pairs of terminals, the C1L and C1H and the C2L
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
GIN
Table 1, Truth
input controls the GOUT terminal. When
Figure 1, 17510 Simplified Internal Block
Table, page 7).
GIN
is set logic HIGH,
Table 1, Truth
GIN
is set