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MAX14872ETC+T

P1-P3P4-P6P7-P9P10-P12P13-P15
General Description
The MAX14870/MAX14872 motor drivers provide a small,
low-power and simple solution for driving and controlling
brushed DC motors and relays with voltages between
4.5V and 36V. Very low driver on-resistance reduces
power dissipation.
These drivers feature a charge-pump-less design for
reduced external components and low supply current.
Integrated fast-decay current regulation allows user-
adjustable peak startup motor currents and requires mini-
mal external components.
A separate voltage-sense input (SNS) reduces current
sensing errors due to parasitic trace resistance.
The MAX14870/MAX14872 features shoot-through protec-
tion and internal free-wheeling diodes that absorb inductive
motor currents. Driver outputs are short-circuit-protected
from shorts to ground, to the supply, and between M1 and
M2. An active-low FAULT output signals thermal overload
and overcurrents during fault conditions.
The MAX14870 has PWM and direction-control inputs,
while the MAX14872 has forward and reverse inputs for
direction control. See the Function Tables.
The MAX14870/MAX14872 are available in a 12-pin
(3mm x 3mm) TDFN-EP package and operate over the
-40°C to +85°C temperature range.
Benets and Features
● Small Package Handles High Power and Reduces
Footprint Circuit Size
• Up to 2.5A Peak Motor Current
• Space-Saving TDFN-EP (3mm x 3mm) Package
• Flexible 4.5V–36V Supply Enables Longer Runtime
on Batteries
● Low Power Consumption Runs Cooler and Longer
• 280mW (typ) Total Bridge On-Resistance
• 1mA (typ) Supply Current at 30kHz/24V
• 10µA (max) Standby Current at 12V
● Simplified Designs Reduces Time to Market
• Charge-Pump-Less Architecture
• Current Regulation Only Requires a Sense Resistor
• Current-Sense Input Simplies PCB Layout
● Integrated Protection Provides Robust Driving Solution
• Short-Circuit-Protected Drivers
• Thermal-Shutdown Undervoltage Lockout
• Diagnostic FAULT Output
• -40°C to +85°C Temperature Range
Applications
● Printers and Scanners
● Relay Drivers
● Vending and Gaming Machines
Ordering Information appears at end of data sheet.
19-7062; Rev 0; 9/14
DRIVER
V
DD
SNS
PWM
+
DIR
+
MAX14870
MAX14872
GND
COM
M
1
M2
EN
FAULT
DRIVER
V
DD
V
DD
CURRENT
REGULATION
R
SENSE
µC
IRQ
PWM
GPO
24V
3.3V
3.
3V
M
+ THESE PIN NAMES ARE FOR THE MAX14870. ON THE MAX14872, THESE ARE THE FWD AND REV INPUTS.
Typical Application Circuit
MAX14870/MAX14872 Compact 4.5V to 36V
Full-Bridge DC Motor Drivers
EVALUATION KIT AVAILABLE
(All voltages referenced to GND.)
V
DD
........................................................................-0.3V to +40V
M1, M2 ..................................................... -0.3V to (V
DD
+ 0.3V)
PWM, DIR, FWD, REV, FAULT, EN, SNS
..................
-0.3V to +6.0V
COM .....................................................................-0.3V to +0.3V
Continuous Current Into M1, M2 .......................................... ±3A
Continuous Power Dissipation (T
A
= +70°C)
Single-Layer Board (derate at 15.9mW/°C
above +70°C) ..........................................................1270mW
Multilayer Board (derate at 24.4mW/°C
above +70°C) ..........................................................1951mW
Operating Temperature Range ........................... -40°C to +85°C
Junction Temperature ...................................................... +150ºC
Storage Temperature Range .............................-65ºC to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Solder Temperature (reflow) ...........................................+260°C
Junction-to-Case Thermal Resistance (θ
JC
)
TDFN-EP (Single-Layer Board) ..................................8.5°C/W
TDFN-EP (Multilayer Board) .......................................8.5°C/W
Junction-to-Ambient Thermal Resistance (θ
JA
)
TDFN-EP (Single-Layer Board) ...................................63°C/W
TDFN-EP (Multilayer Board) ........................................41°C/W
(Note 1)
(V
DD
= 4.5V to 36V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
DD
= 12V, T
A
= +25°C) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLY
Supply Voltage V
DD
4.5 36 V
Supply Current I
DD
EN = low, M1/M2
not connected
f
PWM/FWD
=
50kHz
1
mA
No switching 0.5 1.2
Shutdown Supply Current I
SHDN
EN = high, driver
is in shutdown
V
DD
= 12V 3.7 10
μA
V
DD
= 36V 10 20
Undervoltage Lockout
Threshold
V
UVLO
V
DD
rising 3.3 3.8 4.3 V
Undervoltage Lockout
Threshold Hysteresis
V
UVLO_HYST
400 mV
MAX14870/MAX14872 Compact 4.5V to 36V
Full-Bridge DC Motor Drivers
www.maximintegrated.com
Maxim Integrated
│
2
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Package Thermal Characteristics
Electrical Characteristics
(V
DD
= 4.5V to 36V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
DD
= 12V, T
A
= +25°C) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DRIVER (M1, M2)
Driver Output Resistance
(High Side + Low Side)
R
ON
I
M_
= 2.5A
T
J
= +25°C 280 395
mΩ
T
J
= +125°C 410 580
Driver Overload Current Limit I
M_OL
3 A
M1, M2 Leakage Current I
M_LKG
EN = High, V
M1
= V
M2
= 0V or V
DD
-1 +1 μA
M1, M2 Body Diode
Forward-Voltage
V
BF
Low-side diode, EN = high, I
F
= 2.5A 1.5
V
High-side diode, EN = high, I
F
= 2.5A 1.5
CURRENT REGULATION (SNS, COM)
SNS Current Sense Threshold V
SNS_TH
V
SNS
rising (Note 3) 94 100 110 mV
SNS Input Leakage Current I
SNS_LKG
V
SNS
= ±250mV -1 +1 μA
COM Leakage Current I
COM_LKG
EN = high, V
COM
= ±250mV -1 +1 μA
LOGIC SIGNALS (PWM, DIR, FWD, REV, EN, FAULT)
Input Logic-High Voltage V
IH
FWD, REV, PWM, DIR 2 V
Input Logic-Low Voltage V
IL
FWD, REV, PWM, DIR 0.8 V
EN Input Logic-High Voltage V
EN_IH
1.6
EN Input Logic-Low Voltage V
EN_IL
0.4
Input Leakage Current I
IL
PWM, DIR, FWD, REV, EN,
V
INPUT
= 5.5V or 0V
-1 +1 μA
FAULT Output Low Voltage V
OL
FAULT asserted, I
SINK
= 5mA 0.5 V
FAULT Off Leakage Current I
F_LKG
FAULT deasserted, V
FAULT
= 5.5V -1 +1 μA
PROTECTION
Thermal-Shutdown Threshold T
SHDN
Temperature rising, FAULT asserted +160 °C
Thermal-Shutdown Hysteresis T
SHDN_HYST
10 °C
MAX14870/MAX14872 Compact 4.5V to 36V
Full-Bridge DC Motor Drivers
www.maximintegrated.com
Maxim Integrated
│
3
Electrical Characteristics (continued)
P1-P3P4-P6P7-P9P10-P12P13-P15

MAX14872ETC+T

Mfr. #:
Buy MAX14872ETC+T
Manufacturer:
Maxim Integrated
Description:
Motor / Motion / Ignition Controllers & Drivers 4.5-36V DC Brushed Motor Drive
Lifecycle:
New from this manufacturer.
Delivery:
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