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MAX22203
65V, 3.8A Dual Brushed or Single Stepper
Motor Driver with Integrated Current Sense
General Description
Benefits and Features
The MAX22203 is a dual 65V, 3.8A
H-Bridge with
● Two H-Bridges with 65V Maximum Operating Voltage
MAX
PWM inputs and accurate Current Drive Regulation
(CDR). Each H-Bridge can be controlled individually and
• Total R (High-Side + Low-Side): 300mΩ typical
ON
(T = 25°C)
A
has a very low typical R
(high-side + low-side) of 0.3Ω,
ON
● Current Ratings Per H-Bridge (Typical at 25°C):
resulting in high driving efficiency and low heat generation.
The MAX22203 can be used to drive two Brushed DC mo-
tors or a single Stepper Motor.
• I
= 3.8A (Impulsive Current for Driving
MAX
Capacitive Loads)
• I
= 3A (Maximum Current Setting for
TRIP_MAX
The integrated CDR can limit the start up or stall the cur-
rent of a Brushed DC motor or control the phase current
for stepper operation.
Internal Current Drive Regulation)
• I
= 2A
RMS
RMS
● Integrated Current Drive Regulation (CDR)
• Internal Current Sensing (ICS) Eliminates External
Bulky Resistors and Improves Efficiency
• Current Drive Regulation Monitor Output Pins
(CDRA and CDRB)
The bridge output current is sensed by a non-dissipative
Integrated Current Sensing (ICS) eliminating the bulky ex-
ternal power resistors (which are normally required for this
function) and compared with a configurable threshold cur-
rent (I
). The I
threshold can be set independently
• Multiple Decay Modes (Slow, Mixed, Fast)
• Fixed Off Time Configurable with External
Resistance.
TRIP
TRIP
for the two full bridges by connecting the external resistors
to pins R and R
.
EFB
EFA
The maximum output current per H-Bridge is I
= 3.8A
● Current-Sense Output (Current Monitor)
● Fault Indicator Pin (FAULT)
● Protections
MAX
and is limited by the Overcurrent Protection (OCP) circuit.
This current can be driven for very short transients and
is aimed to effectively drive small capacitive loads. The
maximum user-configurable current regulation threshold is
• Overcurrent Protection for Each Individual Channel
(OCP)
I
= 3A. The maximum RMS current (I
) per
• Undervoltage Lockout (UVLO)
TRIP_MAX
RMS
H-Bridge is 2A
on a standard JEDEC 4-layer board.
• Thermal Shutdown (TSD) T = +165°C
RMS
J
The maximum RMS current can be limited by thermal con-
siderations and depends on the thermal characteristic of
the application (PCB ground planes, heat sinks, forced air
ventilation, etc).
● TQFN38 5mm x 7mm package (TSSOP38 4.4mm x
9.7mm available in the future)
Ordering Information appears at end of data sheet.
The MAX22203 features Overcurrent Protection (OCP),
Thermal Shutdown (TSD), and Undervoltage Lockout
(UVLO). An open-drain active low nFAULT pin is activated
every time a fault condition is detected. During Thermal
Shutdown and Undervoltage Lockout, the driver is tristat-
ed until normal operations are restored.
The MAX22203 is packaged into a small TQFN38 5mm x
7mm package.
Applications
● Brushed DC Motor Driver
● Stepper Motor Driver
● Solenoid Driver
● Latched Valves
19-101012; Rev 0; 5/21