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MAX14870 PDF даташит

Спецификация MAX14870 изготовлена ​​​​«Maxim Integrated» и имеет функцию, называемую «Compact 4.5V to 36V Full-Bridge DC Motor Drivers».

Детали детали

Номер произв MAX14870
Описание Compact 4.5V to 36V Full-Bridge DC Motor Drivers
Производители Maxim Integrated
логотип Maxim Integrated логотип 

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MAX14870 Даташит, Описание, Даташиты
MAX14870/MAX14872
EVALUATION KIT AVAILABLE
Compact 4.5V to 36V
Full-Bridge DC Motor Drivers
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.
Typical Application Circuit
Benefits 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 Simplifies 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.
3.3V
3.3V
IRQ
µC GPO
PWM
FAULT
DIR+
PWM+
EN
24V M
VDD M1
DRIVER
VDD
M2
MAX14870
MAX14872
VDD
DRIVER
CURRENT
REGULATION
SNS
COM
GND
RSENSE
+ THESE PIN NAMES ARE FOR THE MAX14870. ON THE MAX14872, THESE ARE THE FWD AND REV INPUTS.
19-7062; Rev 0; 9/14









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MAX14870 Даташит, Описание, Даташиты
MAX14870/MAX14872
Compact 4.5V to 36V
Full-Bridge DC Motor Drivers
Absolute Maximum Ratings
(All voltages referenced to GND)
VDD.........................................................................-0.3V to +40V
M1, M2........................................................ -0.3V to (VDD+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 (TA = +70°C)
Single-Layer Board (derate at 15.9mW/°C
above +70°C)...........................................................1270mW
Multi-Layer 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
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 (Note 1)
Junction-to-Case Thermal Resistance (θJC)
TDFN-EP (Single-Layer Board)...................................8.5°C/W
TDFN-EP (Multi-Layer Board).....................................8.5°C/W
Junction-to-Ambient Thermal Resistance (θJA)
TDFN-EP (Single-Layer Board)....................................63°C/W
TDFN-EP (Multi-Layer Board)......................................41°C/W
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.
Electrical Characteristics
(VDD = 4.5V to 36V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = 12V, TA = +25°C) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
POWER SUPPLY
Supply Voltage
Supply Current
VDD
IDD
EN = low, M1/M2
not connected
fPWM/FWD =
50kHz
No switching
4.5 36
1
0.5 1.2
UNITS
V
mA
Shutdown Supply Current
Undervoltage Lockout
Threshold
ISHDN
VUVLO
EN = high, driver VDD = 12V
is in shutdown
VDD = 36V
VDD rising
3.7 10
10 20
3.3 3.8 4.3
μA
V
Undervoltage Lockout
Threshold Hysteresis
VUVLO_HYST
400 mV
www.maximintegrated.com
Maxim Integrated 2









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MAX14870 Даташит, Описание, Даташиты
MAX14870/MAX14872
Compact 4.5V to 36V
Full-Bridge DC Motor Drivers
Electrical Characteristics (continued)
(VDD = 4.5V to 36V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = 12V, TA = +25°C) (Note 2)
PARAMETER
DRIVER (M1, M2)
SYMBOL
CONDITIONS
MIN TYP MAX
Driver Output Resistance
(High-Side + Low-Side)
RON
IM_ = 2.5A
TJ = 25°C
TJ = 125°C
280 395
410 580
Driver Overload Current Limit
IM_OL
3
UNITS
A
M1, M2 Leakage Current
IM_LKG
EN = High, VM1 = VM2 = 0V or VDD
-1
+1 μA
M1, M2 Body Diode
Forward-Voltage
Low-side diode, EN = High, IF = 2.5A
VBF
High-side diode, EN = High, IF = 2.5A
CURRENT REGULATION (SNS, COM)
SNS Current Sense Threshold
VSNS_TH VSNS rising (Note 3)
SNS Input Leakage Current
ISNS_LKG VSNS = ±250mV
COM Leakage Current
ICOM_LKG EN = High, VCOM = ±250mV
LOGIC SIGNALS (PWM, DIR, FWD, REV, EN, FAULT)
Input Logic-High Voltage
Input Logic-Low Voltage
EN Input Logic-High Voltage
VIH
VIL
VEN_IH
FWD, REV, PWM, DIR
FWD, REV, PWM, DIR
EN Input Logic-Low Voltage
Input Leakage Current
FAULT Output Low Voltage
FAULT Off Leakage Current
PROTECTION
VEN_IL
IIL
VOL
IF_LKG
PWM, DIR, FWD, REV, EN,
VINPUT = 5.5V or 0V
FAULT asserted, ISINK = 5mA
FAULT deasserted, VFAULT = 5.5V
Thermal-Shutdown Threshold
TSHDN
Temperature rising, FAULT asserted
Thermal-Shutdown Hysteresis TSHDN_HYST
94
-1
-1
2
1.6
-1
-1
1.5
1.5
100 110
+1
+1
0.8
0.4
+1
0.5
+1
+160
10
V
mV
μA
μA
V
V
μA
V
μA
°C
°C
www.maximintegrated.com
Maxim Integrated 3










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