Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - motor controllers Low-side (2) Parallel TO 220 11

LMD18200

www.ti.com

SNVS091F –DECEMBER 1999–REVISED APRIL 2013

LMD18200 3A, 55V H-Bridge

Check for Samples: LMD18200

FEATURES

APPLICATIONS

• Delivers Up to 3A Continuous Output

• DC and Stepper Motor Drives

• Operates at Supply Voltages Up to 55V • Position and Velocity Servomechanisms

• Low R

(ON) Typically 0.33Ω per Switch at 3A • Factory Automation Robots

• TTL and CMOS Compatible Inputs • Numerically Controlled Machinery

• No “Shoot-Through” Current • Computer Printers and Plotters

• Thermal Warning Flag Output at 145°C

DESCRIPTION

• Thermal Shutdown (Outputs Off) at 170°C

The LMD18200 is a 3A H-Bridge designed for motion

• Internal Clamp Diodes

control applications. The device is built using a multi-

• Shorted Load Protection

technology process which combines bipolar and

CMOS control circuitry with DMOS power devices on

• Internal Charge Pump with External Bootstrap

the same monolithic structure. Ideal for driving DC

Capability

and stepper motors; the LMD18200 accommodates

peak output currents up to 6A. An innovative circuit

which facilitates low-loss sensing of the output current

has been implemented.

Functional Diagram

Figure 1. Functional Block Diagram of LMD18200

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (20 pages)

PAGE 1
LMD18200 www.ti.com SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 LMD18200 3A, 55V H-Bridge Check for Samples: LMD18200 FEATURES APPLICATIONS • • • • • • • • • • • • • • • 1 2 Delivers Up to 3A Continuous Output Operates at Supply Voltages Up to 55V Low RDS(ON) Typically 0.
PAGE 2
LMD18200 SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 www.ti.com Connection Diagram Figure 2.
PAGE 3
LMD18200 www.ti.com SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
PAGE 4
LMD18200 SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 www.ti.com Electrical Characteristics (1) (continued) The following specifications apply for VS = 42V, unless otherwise specified. Boldface limits apply over the entire operating temperature range, −40°C ≤ TJ ≤ +125°C, all other limits are for TA = TJ = 25°C. Symbol Parameter Conditions Typ Limit Units 9 V (min) 11 V (max) Undervoltage Lockout Outputs turn OFF TJW Warning Flag Temperature Pin 9 ≤ 0.
PAGE 5
LMD18200 www.ti.com SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 Typical Performance Characteristics VSAT vs Flag Current RDS(ON) vs Temperature Figure 3. Figure 4. RDS(ON) vs Supply Voltage Supply Current vs Supply Voltage Figure 5. Figure 6. Supply Current vs Frequency (VS = 42V) Supply Current vs Temperature (VS = 42V) Figure 7. Figure 8.
PAGE 6
LMD18200 SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics (continued) 6 Current Sense Output vs Load Current Current Sense Operating Region Figure 9. Figure 10.
PAGE 7
LMD18200 www.ti.
PAGE 8
LMD18200 SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 www.ti.com Pinout Description (See Test Circuit) Pin 1, BOOTSTRAP 1 Input: Bootstrap capacitor pin for half H-bridge number 1. The recommended capacitor (10 nF) is connected between pins 1 and 2. Pin 2, OUTPUT 1: Half H-bridge number 1 output. Pin 3, DIRECTION Input: See Logic Truth Table. This input controls the direction of current flow between OUTPUT 1 and OUTPUT 2 (pins 2 and 10) and, therefore, the direction of rotation of a motor load.
PAGE 9
LMD18200 www.ti.com SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 APPLICATION INFORMATION TYPES OF PWM SIGNALS The LMD18200 readily interfaces with different forms of PWM signals. Use of the part with two of the more popular forms of PWM is described in the following paragraphs. Simple, locked anti-phase PWM consists of a single, variable duty-cycle signal in which is encoded both direction and amplitude information (see Figure 11).
PAGE 10
LMD18200 SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 www.ti.com Figure 13. Transitions in Brake, Direction, or PWM Must Be Separated By At Least 1 µsec USING THE CURRENT SENSE OUTPUT The CURRENT SENSE output (pin 8) has a sensitivity of 377 μA per ampere of output current. For optimal accuracy and linearity of this signal, the value of voltage generating resistor between pin 8 and ground should be chosen to limit the maximum voltage developed at pin 8 to 5V, or less.
PAGE 11
LMD18200 www.ti.com SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 CURRENT LIMITING Current limiting protection circuitry has been incorporated into the design of the LMD18200. With any power device it is important to consider the effects of the substantial surge currents through the device that may occur as a result of shorted loads.
PAGE 12
LMD18200 SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 www.ti.com Figure 15. Bootstrap Circuitry INTERNAL PROTECTION DIODES A major consideration when switching current through inductive loads is protection of the switching power devices from the large voltage transients that occur. Each of the four switches in the LMD18200 have a built-in protection diode to clamp transient voltages exceeding the positive supply or ground to a safe diode voltage drop across the switch.
PAGE 13
LMD18200 www.ti.com SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 Figure 16. Fixed Off-Time Control Figure 17.
PAGE 14
LMD18200 SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 www.ti.com TORQUE REGULATION Locked Anti-Phase Control of a brushed DC motor. Current sense output of the LMD18200 provides load sensing. The LM3524D is a general purpose PWM controller. The relationship of peak motor current to adjustment voltage is shown in Figure 19. Figure 18. Locked Anti-Phase Control Regulates Torque Figure 19.
PAGE 15
LMD18200 www.ti.com SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 VELOCITY REGULATION Utilizes tachometer output from the motor to sense motor speed for a locked anti-phase control loop. The relationship of motor speed to the speed adjustment control voltage is shown in Figure 21. Figure 20. Regulate Velocity with Tachometer Feedback Figure 21.
PAGE 16
LMD18200 SNVS091F – DECEMBER 1999 – REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision E (April 2013) to Revision F • 16 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
PAGE 17
PACKAGE OPTION ADDENDUM www.ti.
PAGE 18
PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
PAGE 19
MECHANICAL DATA NDJ0011B TA11B (Rev B) www.ti.
PAGE 20
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.