MC33926 Datasheet

ManualsBrandsPololu Manuals<10A DC ControllersDual MC33926 Motor Driver Shield for Arduino

Table Of Contents

5.0 A Throttle Control H-Bridge

Document Number: MC33926

Rev. 8.0, 4/2009

Freescale Semiconductor

Advance Information

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

5.0 A Throttle Control H-Bridge

The 33926 is a monolithic H-Bridge Power IC designed primarily

for automotive electronic throttle control, but is applicable to any low-

voltage DC servo motor control application within the current and

voltage limits stated in this specification.

The 33926 is able to control inductive loads with currents up to

5.0

A peak. RMS current capability is subject to the degree of

heatsinking provided to the device package. Internal peak-current

limiting (regulation) is activated at load currents above 6.5

A ± 1.5 A.

Output loads can be pulse width modulated (PWM’ed) at frequencies

up to 20

kHz. A load current feedback feature provides a proportional

(0.24% of the load current) current output suitable for monitoring by a

microcontroller’s A/D input. A Status Flag output reports under-

voltage, over-current, and over-temperature fault conditions.

Two independent inputs provide polarity control of two half-bridge

totem-pole outputs. Two independent disable inputs are provided to

force the H-Bridge outputs to tri-state (high-impedance off-state). An

inverted input changes the IN1 and IN2 inputs to LOW = true logic.

Features

• 8.0 to 28 V continuous operation (transient operation from 5.0 to

• 225 mΩ maximum R

DS(ON)

@ 150°C (each H-Bridge MOSFET)

•3.0 V and 5.0 V TTL / CMOS logic compatible inputs

• Over-current limiting (Regulation) via an internal constant-off-time

PWM

• Output short-circuit protection (short to VPWR or ground)

• Temperature-dependent current-limit threshold reduction

• All Inputs have an internal source/sink to define the default (floating input) states

• Sleep mode with current draw < 50 µA (with inputs floating or set to match default logic states)

• Pb-free packaging designated by suffix code PNB

Figure 1. 33926 Simplified Application Diagram

ORDERING INFORMATION

Device

Temperature

Range (T

)

Package

MC33926PNB/R2

-40°C to 125°C 32 PQFN

SCALE 2:1

PNB SUFFIX (Pb-FREE)

32-PIN PQFN

Bottom View

33926

AUTOMOTIVE THROTTLE H-BRIDGE

ACTUATOR/ MOTOR EXCITER

98ARL10579D

IN1

IN2

INV

SLEW

VPWR

CCP

OUT1

OUT2

PGND

AGND

MCU

33926

PWR

MOTOR

Summary of content (25 pages)

PAGE 1
Freescale Semiconductor Advance Information Document Number: MC33926 Rev. 8.0, 4/2009 5.0 A Throttle Control H-Bridge 33926 The 33926 is a monolithic H-Bridge Power IC designed primarily for automotive electronic throttle control, but is applicable to any lowvoltage DC servo motor control application within the current and voltage limits stated in this specification. The 33926 is able to control inductive loads with currents up to 5.0 A peak.
PAGE 2
INTERNAL BLOCK DIAGRAM INTERNAL BLOCK DIAGRAM VPWR LOGIC SUPPLY CCP VDD VCP CHARGE PUMP HS1 HS2 OUT1 TO GATES EN HS1 IN1 LS1 IN2 HS2 D2 D1 INV GATE DRIVE AND PROTECTION LOGIC SLEW OUT2 LS1 PGND LS2 VSENSE ILIM PWM SF LS2 CURRENT MIRROR AND CONSTANT OFF-TIME PWM CURRENT REGULATOR FB PGND AGND Figure 2.
PAGE 3
PIN CONNECTIONS D1 OUT2 OUT2 OUT2 OUT2 25 NC 2 24 PGND SLEW 3 23 PGND VPWR 4 22 PGND AGND 5 21 SF VPWR 6 20 PGND INV 7 19 PGND FB 8 18 PGND NC 9 17 NC AGND D2 OUT1 OUT1 OUT1 10 11 12 13 14 15 16 OUT1 IN1 32 31 30 29 28 27 26 VPWR 1 EN Transparent Top View of Package IN2 VPWR CCP PIN CONNECTIONS Figure 3. 33926 Pin Connections Table 1.
PAGE 4
PIN CONNECTIONS Table 1. 33926 Pin Definitions (continued) A functional description of each pin can be found in the Functional Description section beginning on page 12. Pin Function Formal Name Definition Pin Pin Name 12, 13, 14, 15 OUT1 Power Output H-Bridge Output 1 16 D2 Logic Input Disable Input 2 (Active Low) When D2 is logic LOW, both OUT1 and OUT2 are tri-stated. (Schmitt trigger input with ~80 μA sink so default condition = disabled.
PAGE 5
ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS Table 2. Maximum Ratings All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or permanent damage to the device. These parameters are not production tested.
PAGE 6
ELECTRICAL CHARACTERISTICS MAXIMUM RATINGS Table 2. Maximum Ratings (continued) All voltages are with respect to ground unless otherwise noted. Exceeding these ratings may cause a malfunction or permanent damage to the device. These parameters are not production tested. Ratings Symbol Value Unit Peak Package Reflow Temperature During Reflow (7), (8) TPPRT 250 °C Approximate Junction-to-Case Thermal Resistance (9) RθJC < 1.0 °C/W Notes 7.
PAGE 7
ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS Table 3. Static Electrical Characteristics Characteristics noted under conditions 8.0 V ≤ VPWR ≤ 28 V, - 40°C ≤ TA ≤ 125°C, GND = 0 V unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25°C under nominal conditions unless otherwise noted. Characteristic Symbol Min Typ Max VPWR(SS) 8.0 – 28 VPWR(t) – – 40 VPWR(QF) 5.0 – 8.
PAGE 8
ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS Table 3. Static Electrical Characteristics (continued) Characteristics noted under conditions 8.0 V ≤ VPWR ≤ 28 V, - 40°C ≤ TA ≤ 125°C, GND = 0 V unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25°C under nominal conditions unless otherwise noted. Characteristic Symbol Min Typ Max Unit – 120 – VPWR = 8.0 V, TJ = 150°C – – 225 VPWR = 5.0 V, TJ = 150°C – – 325 5.2 6.5 8.0 – 4.
PAGE 9
ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS Table 4. Dynamic Electrical Characteristics Characteristics noted under conditions 8.0 V ≤ VPWR ≤ 28 V, - 40°C ≤ TA ≤ 125°C, GND = 0 V unless otherwise noted. Typical values noted reflect the approximate parameter means at TA = 25°C under nominal conditions unless otherwise noted.
PAGE 10
ELECTRICAL CHARACTERISTICS TIMING DIAGRAMS VIN1, IN2 (V) 5.0 VOUT1, 2 (V) TIMING DIAGRAMS VPWR 1.5 V 1.5 V 0 t DON t DOFF 80% 20% 0 TIME 5.0 V 1.5 V 0V IO = 100mA VOUT1, 2 VD1, D2 (V) Figure 4. Output Delay Time tDDISABLE 90% 0V TIME Figure 5. Disable Delay Time VOUT1, 2 (V) . tF VPWR tR 90% 90% 10% 0 10% TIME Figure 6. Output Switching Time Overload Condition IOUT, CURRENT (A) 9.0 ISC Short Circuit Detection Threshold tB 6.5 0.0 5.
PAGE 11
ELECTRICAL CHARACTERISTICS TIMING DIAGRAMS Short Circuit Condition t FAULT IOUT, CURRENT (A) 9.0 ISC Short Circuit Detection Threshold Hard Short Occurs tB 6.5 OUT1, OUT2 Tri-Stated, SF set Low Ilim 0.0 5.0 t B (~16 μs) TIME Figure 8. Short-circuit Detection Turn-OFF Time tFAULT . ILIM CURRENT (A) Nominal Current Limit Threshold Current Limit Threshold Foldback. Operation within this region must be limited to non-repetitive events not to exceed 30 s per 24 hr. 6.5 4.
PAGE 12
FUNCTIONAL DESCRIPTION INTRODUCTION FUNCTIONAL DESCRIPTION INTRODUCTION Numerous protection and operational features (speed, torque, direction, dynamic breaking, PWM control, and closed-loop control) make the 33926 a very attractive, costeffective solution for controlling a broad range of small DC motors. The 33926 outputs are capable of supporting peak DC load currents of up to 5.0 A from a 28 VPWR source.
PAGE 13
FUNCTIONAL DESCRIPTION FUNCTIONAL PIN DESCRIPTION device circuitry is fully operational and the supply IPWR(STANDBY) current is reduced to a few mA. Refer to Table 3, Static Electrical Characteristics, page 7. H-BRIDGE OUTPUT (OUT1, OUT2) These pins are the outputs of the H-Bridge with integrated freewheeling diodes. The bridge output is controlled using the IN1, IN2, D1, and D2 inputs. The outputs have PWM current limiting above the ILIM threshold.
PAGE 14
FUNCTIONAL INTERNAL BLOCK DESCRIPTION FUNCTIONAL PIN DESCRIPTION FUNCTIONAL INTERNAL BLOCK DESCRIPTION 33926 CURRENT SENSE VOLTAGE REGULATION TEMPERATURE CHARGE SENSE PUMP ANALOG CONTROL AND PROTECTION PWM CONTROLLER MCU INTERFACE H-BRIDGE OUTPUT DRIVERS OUT1 - OUT2 COMMAND AND FAULT REGISTERS PROTECTION LOGIC CONTROL GATE CONTROL LOGIC Figure 10. Functional Internal Block Diagram ANALOG CONTROL AND PROTECTION CIRCUITRY: The on-chip voltage regulator supplies 3.3 V to the internal logic.
PAGE 15
FUNCTIONAL DEVICE OPERATION OPERATIONAL MODES FUNCTIONAL DEVICE OPERATION SF, LOGIC OUT D2, LOGIC IN D1, LOGIC IN INn, LOGIC IN ILOAD, OUTPUT CURRENT (A) OPERATIONAL MODES 9.0 Typical Short Circuit Detection Threshold 6.
PAGE 16
FUNCTIONAL DEVICE OPERATION LOGIC COMMANDS AND REGISTERS LOGIC COMMANDS AND REGISTERS Table 5. Truth Table The tri-state conditions and the status flag are reset using D1 or D2. The truth table uses the following notations: L = LOW, H = HIGH, X = HIGH or LOW, and Z = High Impedance. All output power transistors are switched off.
PAGE 17
FUNCTIONAL DEVICE OPERATION PROTECTION AND DIAGNOSTIC FEATURES PROTECTION AND DIAGNOSTIC FEATURES SHORT-CIRCUIT PROTECTION If an output short-circuit condition is detected, the power outputs tri-state (latch-OFF) independent of the input (IN1 and IN2) states, and the fault status output flag (SF) is SET to a logic LOW.
PAGE 18
TYPICAL APPLICATIONS INTRODUCTION TYPICAL APPLICATIONS INTRODUCTION A typical application schematic is shown in Figure 14. For precision high current applications in harsh, noisy environments, the VPWR by-pass capacitor may need to be substantially larger. VPWR 100 μF LOW ESR 100 nF VPWR 33 nF LOGIC SUPPLY CCP VCP CHARGE PUMP STATUS FLAG TO ADC RFB 270 Ω INV SLEW SF M OUT2 LS1 LS2 LS1 IN2 +5.
PAGE 19
PACKAGING PACKAGE DIMENSIONS PACKAGING PACKAGE DIMENSIONS For the most current package revision, visit www.freescale.com and perform a keyword search using the 98Axxxxxxxxx listed below.
PAGE 20
PACKAGING PACKAGE DIMENSIONS PNB SUFFIX 98ARL10579D 32-PIN PQFN ISSUE C 33926 20 Analog Integrated Circuit Device Data Freescale Semiconductor
PAGE 21
ADDITIONAL DOCUMENTATION THERMAL ADDENDUM (REV 2.0) ADDITIONAL DOCUMENTATION 33926 THERMAL ADDENDUM (REV 2.0) Introduction This thermal addendum is provided as a supplement to the 33926 technical datasheet. The addendum provides thermal performance information that may be critical in the design and development of system applications. All electrical, application, and packaging information is provided in the datasheet.
PAGE 22
D1 OUT2 OUT2 OUT2 OUT2 25 NC 2 24 PGND SLEW 3 23 PGND VPWR 4 22 PGND AGND 5 21 SF VPWR 6 20 PGND INV 7 19 PGND FB 8 18 PGND NC 9 17 NC AGND A D2 OUT1 OUT1 OUT1 10 11 12 13 14 15 16 OUT1 IN1 32 31 30 29 28 27 26 VPWR 1 EN IN2 VPWR CCP ADDITIONAL DOCUMENTATION THERMAL ADDENDUM (REV 2.0) 33926PNB Pin Connections 32-Pin PQFN 0.80 mm Pitch 8.0 mm x 8.0 mm Body Figure 16.
PAGE 23
ADDITIONAL DOCUMENTATION THERMAL ADDENDUM (REV 2.0) 90 Thermal Resistance [ºC/W] 80 70 60 50 40 30 x 20 RθJA [°C/W] 10 0 0 300 600 Heat Spreading Area A [mm²] Figure 17. Device on Thermal Test Board RθJA Thermal Resistance [ºC/W] 100 10 x 1 0.1 1.00E-03 1.00E-02 1.00E-01 RθJA [°C/W] 1.00E+00 1.00E+01 1.00E+02 1.00E+03 1.00E+04 Time[s] Figure 18. Transient Thermal Resistance RθJA, 1.
PAGE 24
REVISION HISTORY REVISION HISTORY REVISION DATE DESCRIPTION 1.0 3/2006 • Updated formatting and technical content throughout entire document. 2.0 6/2007 • Updated formatting and technical content throughout entire document 3.0 10/2006 • Updated formatting and technical content throughout entire document 4.0 12/2006 • Updated formatting and technical content throughout entire document 5.0 2/2007 • Updated formatting and technical content throughout entire document 6.
PAGE 25
How to Reach Us: Home Page: www.freescale.com Web Support: http://www.freescale.com/support USA/Europe or Locations Not Listed: Freescale Semiconductor, Inc. Technical Information Center, EL516 2100 East Elliot Road Tempe, Arizona 85284 +1-800-521-6274 or +1-480-768-2130 www.freescale.