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65V, 7.6A High Current Single H-Bridge with
Integrated Current-Sense
MAX22205
General Description
Benefits and Features
The MAX22205 integrates a high current 65V, 7.6A
● One H-Bridge with +65V Voltage Rating
MAX
H-Bridge to drive one Brushed DC motor or one half Step-
per motor. The H-Bridge FETs feature very low imped-
ance, resulting in high driving efficiency and low heat. The
• Total R (High-Side + Low-Side): 150mΩ
DS(ON)
Typical (T = 25°C)
A
● Current Ratings per H-Bridge (Typical at 25°C):
typical total R
(high-side + low-side) is 0.15Ω. The H-
ON
• I
= 7.6A
(Impulsive Current for Driving
MAX
MAX
Bridge can be PWM controlled by two logic inputs (DINA,
DINB). A third Enable (EN) logic input can be used to con-
figure the outputs to high impedance for coasting the mo-
tor.
Capacitive Loads)
• I = 6A (Max Full Scale Current Setting for Internal
FS
Current Drive Regulation)
• I
= 4A
(T = 25°C, V = +24V)
RMS A M
RMS
The MAX22205 features an accurate optional Current Dri-
ve Regulation (CDR), which can be used to limit the start
up current of a Brushed DC motor or control the phase
current for stepper operation. The bridge output current is
sensed by a non-dissipative Integrated Current Sensing
(ICS) and it is then compared with the desired threshold
current. As soon as the bridge current exceeds the thresh-
● Integrated Current Control
• Full-Scale DAC Current Configurable with External
Resistance
• Internal Current Sensing (ICS) Eliminates External
Bulky Resistors and Improves Efficiency
• Current Drive Regulation Monitor Output Pin (CDR
Pin)
old (I
), the device enforces the decay for a fixed OFF-
TRIP
• Integrated DAC Sets the Output Current Level
among 16 Values
time (t
). The non-dissipative ICS eliminates the bulky
OFF
external power resistors normally required for this func-
tion, resulting in a dramatic space and power saving com-
pared with mainstream applications based on the exter-
nal sense resistor. A current proportional to the internal-
ly-sensed motor current is output to the analog pins (ISE-
NA, ISENB) to monitor current. Also, one open-drain out-
put (CDR pin) is asserted every time the internal current
regulation is taking control of the driver so that the activity
of the internal current loop can be monitored.
• Multiple Decay Modes (Slow, Mixed, Fast)
• Fixed OFF Time Configurable with External
Resistance
● Current-Sense Output (Current Monitor)
● Fault Indicator Pin (FAULT)
● Protections
• Overcurrent Protection for each Individual Channel
(OCP)
• Undervoltage Lockout (UVLO)
The maximum output current per H-Bridge is I
=
MAX
• Thermal Shutdown T = 155°C (TSD)
J
7.6A
limited by the Overcurrent Protection (OCP). The
MAX
● TQFN38 5mm x 7mm Package (TSSOP38 4.4mm x
9.7mm Available in the Future)
device delivers up to 4ARMS at VM = +24V and TA = 25°C
with proper PCB ground plane for thermal dissipation. The
current capability depends on the PCB thermal character-
istic (PCB ground planes, heatsinks, ventilation, etc.).
The MAX22205 features Overcurrent Protection (OCP),
Thermal Shutdown (TSD), and Undervoltage Lockout
(UVLO). An open-drain active low FAULT pin is activated
every time a fault condition is detected. During Thermal
Shutdown and Undervoltage Lockout, all the channels are
disabled until normal operating conditions are restored.
The MAX22205 is packaged into a small TQFN38 5mm x
7mm package.
Applications
● Brushed DC Motor Driver
● Stepper Motor Driver
● Solenoid Driver
● Latched Valves
19-101140A; Rev 0; 8/21
Ordering Information appears at end of data sheet.
© 2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners.
One Analog Way, Wilmington, MA 01887 U.S.A. | Tel: 781.329.4700 | © 2021 Analog Devices, Inc. All rights reserved.
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