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LMD18200
3A,55V H-Bridge
General Description
The LMD18200is a 3A H-Bridge designed for motion control applications.The device is built using a multi-technology pro-cess which combines bipolar and CMOS control circuitry with DMOS power devices on the same monolithic structure.Ideal for driving DC and stepper motors;the LMD18200ac-commodates peak output currents up to 6A.An innovative circuit which facilitates low-loss nsing of the output current has been implemented.
Features
n Delivers up to 3A continuous output n Operates at supply voltages up to 55V n Low R DS (ON)typically 0.3Ωper switch n
TTL and CMOS compatible inputs
n No “shoot-through”current
n Thermal warning flag output at 145˚C n Thermal shutdown (outputs off)at 170˚C n Internal clamp diodes n Shorted load protection
n
Internal charge pump with external bootstrap capability
Applications
n DC and stepper motor drives
n Position and velocity rvomechanisms n Factory automation robots
n Numerically controlled machinery n
Computer printers and plotters
Functional Diagram
DS010568-1
FIGURE 1.Functional Block Diagram of LMD18200
December 1999
LMD182003A,55V H-Bridge
©1999National Semiconductor Corporation
Connection Diagrams and Ordering Information
DS010568-2
11-Lead TO-220Package
Top View
Order Number LMD18200T See NS Package TA11B
DS010568-25
24-Lead Dual-in-Line Package
Top View
Order Number LMD18200-2D-QV
5962-9232501VXA LMD18200-2D/8835962-9232501MXA See NS Package DA24B
L M D 18200
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Absolute Maximum Ratings(Note1)
If Military/Aerospace specified devices are required, plea contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Total Supply Voltage(V S,Pin6)60V Voltage at Pins3,4,5,8and912V Voltage at Bootstrap Pins
(Pins1and11)V OUT+16V Peak Output Current(200ms)6A Continuous Output Current(Note2)3A Power Dissipation(Note3)25W Power Dissipation(T A=25˚C,Free Air)3W Junction Temperature,T J(max)150˚C ESD Susceptibility(Note4)1500V Storage Temperature,T STG−40˚C to+150˚C Lead Temperature(Soldering,10c.)300˚C
Operating Ratings(Note1)
Junction Temperature,T J−40˚C to+125˚C V S Supply Voltage+12V to+55V
Electrical Characteristics(Note5)
The following specifications apply for V S=42V,unless otherwi specified.Boldface limits apply over the entire operating temperature range,−40˚C≤T J≤+125˚C,all other limits are for T A=T J=25˚C.
Symbol Parameter Conditions Typ Limit Units
R DS(ON)Switch ON Resistance Output Current=3A(Note6)0.330.4/0.6Ω(max)
R DS(ON)Switch ON Resistance Output Current=6A(Note6)0.330.4/0.6Ω(max)
V CLAMP Clamp Diode Forward Drop Clamp Current=3A(Note6) 1.2 1.5V(max)
V IL Logic Low Input Voltage Pins3,4,5−0.1V(min)我与老师
0.8V(max)
教研活动方案I IL Logic Low Input Current V IN=−0.1V,Pins=3,4,5−10µA(max)
V IH Logic High Input Voltage Pins3,4,52V(min)
12V(max)
I IH Logic High Input Current V IN=12V,Pins=3,4,510µA(max)
Current Sen Output I OUT=1A(Note8)377325/300µA(min)
425/450µA(max) Current Sen Linearity1A≤I OUT≤3A(Note7)±6±9%
Undervoltage Lockout Outputs turn OFF9V(min)
11V(max)
T JW Warning Flag Temperature Pin9≤0.8V,I L=2mA145˚C
如饮醍醐
V F(ON)Flag Output Saturation Voltage T J=T JW,I L=2mA0.15V
I F(OFF)Flag Output Leakage V F=12V0.210µA(max)
T JSD Shutdown Temperature Outputs Turn OFF170˚C
I S Quiescent Supply Current All Logic Inputs Low1325mA(max)
t Don Output Turn-On Delay Time Sourcing Outputs,I OUT=3A300ns
Sinking Outputs,I OUT=3A300ns
t on Output Turn-On Switching Time Bootstrap Capacitor=10nF
Sourcing Outputs,I OUT=3A100ns
Sinking Outputs,I OUT=3A80ns
t Doff Output Turn-Off Delay Times Sourcing Outputs,I OUT=3A200ns
Sinking Outputs,I OUT=3A200ns
t off Output Turn-Off Switching Times Bootstrap Capacitor=10nF
Sourcing Outputs,I OUT=3A75ns
Sinking Outputs,I OUT=3A70ns
t pw Minimum Input Pul Width Pins3,4and51µs
t cpr Charge Pump Ri Time No Bootstrap Capacitor20µs
LMD18200
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Electrical Characteristics Notes
Note 1:Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.DC and AC electrical specifications do not apply when op-erating the device beyond its rated operating conditions.
Note 2:See Application Information for details regarding current limiting.
Note 3:The maximum power dissipation must be derated at elevated temperatures and is a function of T J(max),θJA ,and T A .The maximum allowable power dis-sipation at any temperature is P D(max)=(T J(max)−T A )/θJA ,or the number given in the Absolute Ratings,whichever is lower.The typical thermal resistance from junc-tion to ca (θJC )is 1.0˚C/W and from junction to ambient (θJA )is 30˚C/W.For guaranteed operation T J(max)=125˚C.
Note 4:Human-body model,100pF discharged through a 1.5k Ωresistor.Except Bootstrap pins (pins 1and 11)which are protected to 1000V of ESD.Note 5:All limits are 100%production tested at 25˚C.Temperature extreme limits are guaranteed via correlation using accepted SQC (Statistical Quality Control)methods.All limits are ud to calculate AOQL,(Average Outgoing Quality Level).Note 6:Output currents are puld (t W <2ms,Duty Cycle <5%).
Note 7:Regulation is calculated relative to the current n output value with a 1A load.Note 8:Selections for tighter tolerance are available.Contact factory.
Typical Performance Characteristics
V SAT vs Flag Current
DS010568-16R DS (ON)vs Temperature
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R DS (ON)vs Supply Voltage
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Supply Current vs Supply Voltage
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Supply Current vs Frequency (V S =42V)
DS010568-20Supply Current vs
Temperature (V S =42V)
DS010568-21
新白娘子传奇歌曲Current Sen Output vs Load Current DS010568-22Current Sen Operating Region
DS010568-23
L M D 18200联贯
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Test Circuit
豆角炒蛋
Switching Time Definitions
Pinout Description(See Connection Diagram) Pin1,BOOTSTRAP1Input:Bootstrap capacitor pin for half H-bridge number1.The recommended capacitor(10nF)is connected between pins1and2.
Pin2,OUTPUT1:Half H-bridge number1output.
Pin3,DIRECTION Input:See Table1.This input controls the direction of current flow between OUTPUT1and OUT-PUT2(pins2and10)and,therefore,the direction of rotation of a motor load.
Pin4,BRAKE Input:See Table1.This input is ud to brake a motor by effectively shorting its terminals.When braking is desired,this input is taken to a logic high level and
it is also necessary to apply logic high to PWM input,pin5.
The drivers that short the motor are determined by the logic
level at the DIRECTION input(Pin3):with Pin3logic high,
both current sourcing output transistors are ON;with Pin3
logic low,both current sinking output transistors are ON.All
output transistors can be turned OFF by applying a logic high
to Pin4and a logic low to PWM input Pin5;in this ca only
a small bias current(approximately−1.5mA)exists at each
output pin.
Pin5,PWM Input:See Table1.How this input(and DIREC-
TION input,Pin3)is ud is determined by the format of the
PWM Signal.
DS010568-8
DS010568-9
LMD18200
松针煮水的功效与作用
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