2943中文资料

2943

HIGH-CURRENT HALF-BRIDGE MOTOR DRIVER

T I N U E D O D U C T R E F E R E N C E O

N L Y Designed for use as a general-purpose motor driver, the

UDN2943Z half-bridge driver combines high-current sink and source drivers with logic stages, level shifting, diode transient protection, and a voltage regulator for single-supply operation. Capable of operating in extremely harsh environments, this device can withstand high

ambient temperatures, output overloads, and repeated power supply transient voltages without damage. The driver can be used in pairs for full-bridge operation, or as triplets in three-phase brushless dc motor-drive applications.

The input circuitry is compatible with TTL, low-voltage CMOS,and NMOS logic. Logic lockout prevents both source and sink drivers from turning ON simultaneously. Each driver is turned ON by an active-low input, making the UDN2943Z especially desirable in many micro-processor applications. An accidental input open circuit will turn OFF the corresponding output. The device also provides an internally-generated dead time to prevent crossover currents during output switching. Monolithic, space-saving construction offers reliability unobtainable with discrete components.

Saturated output drivers provide for low saturation voltage at the maximum rated current. Internal short-circuit protection, activated at load currents above 1 A, protects the source driver from accidental short-circuits between the output and ground.

The UDN2943Z driver is rated for continuous operation with inductive loads at supply voltages of up to 24 V. With supply voltage transients (to 35 V maximum), a high-voltage protection circuit becomes operative, shutting OFF both output drivers. The internal thermal shutdown is triggered by a nominal junction temperature of 160°C.

Single-chip construction and a 5-lead power-tab TS-001 plastic package provide cost-effective and reliable systems designs.

It also features excellent power dissipation ratings, minimum size, and ease of installation. The heat-sink tab is at ground potential and does not require insulation.

FEATURES

s ±1 A Output Current

s 8.5 V to 24 V Operating Range s Saturated Output Drivers s Crossover-Current Protected

s Logic-Compatible Inputs s Withstands 35 V Supply Transients s Output-Transient Protection s Internal Over-Voltage Protection s

Tri-State Output s Internal Short-Circuit Protection

HIGH-CURRENT

HALF-BRIDGE MOTOR DRIVER

2943

Always order by complete part number: UDQ2943Z .

A

Data Sheet 29318.4B

A

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

LOGIC TRUTH TABLE

Source Driver

Sink Driver Output Pin 2

Pin 5

Pin 4Low Low High Low High High High Low Low High

High

High Z

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000Copyright ? 1986, 1994, Allegro MicroSystems, Inc.15

10

5

0A L L O W A B L E P A C K A G E P O W E R D I S S I P A T I O N I N W A T T S

TEMPERATURE IN °C

20

Dwg. GP-014A

ELECTRICAL CHARACTERISTICS at T A = +25°C, V S = +24 V (unless otherwise noted).

Source Driver Sink Driver Output Limits Characteristic

Symbol Input, Pin 2

Input, Pin 5

Pin 4Other Min.Typ.Max.Units Output Leakage Current I CEX

2.4 V 2.4 V 0 V ——-10-100μA (V S = +35 V)

2.4 V 2.4 V 35 V

——10100μA Output Sustaining Voltage

V CE(sus) 2.4 V 0.8 to 2.4 V 1.0 A Fig. 1A 24——V 0.8 to 2.4 V

2.4 V -1.0 A Fig. 1B 24——V Output Saturation Voltage

V CE(SAT)

0.8 V 2.4 V -1.0 A —— 1.2 1.8V 2.4 V

0.8 V 1.0 A ——0.6 1.0V Short-Circuit Source Current I SC 0.8 V 2.4 V 0 V — 1.0— 1.8A Logic Input Voltage

V IN(1)———— 2.0——V V IN(0)

——————0.8V Input Current

I IN(1) 2.4 V 2.4 V NC ——10100μA I IN(0)

0.8 V 0.8 V NC ——-50-200μA Clamp Diode Forward Voltage V F NC NC 1.0 A Fig. 2— 1.5 2.0V Logic Supply Current

I S

2.4 V 2.4 V NC ——1530mA 2.4 V 0.8 V NC ——5575mA 0.8 V

2.4 V NC ——3040mA Thermal Shutdown Temperature T J —————160—°C Over-Voltage Shutdown V S ————24—35V Propagation Delay

t PD

2.4 V 2.4 V to 0.8 V

0.4 A Fig. 3—0.6—μs 0.8 to 2.4 V 2.4 V -0.4 A Fig. 4— 1.0—μs 2.4 V 0.8 to 2.4 V 0.4 A Fig. 3— 1.1—μs 2.4 to 0.8 V

2.4 V

-0.4 A

Fig. 4

—

0.6

—

μs

Notes:Negative current is defined as coming out of (sourcing) the specified device pin.

Typical Data is for design information only.

OUTPUT CURRENT

SOURCE INPUT

VOLTAGE

SINK INPUT VOLTAGE

+

0 –

SINKING CURRENT

SOURCING CURRENT

OPEN CIRCUIT

A

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

Figure 2

Figure 1A

Figure 3Figure 4

Dwg. EP-053

Dwg. EP-056

Dwg. EP-057

Dwg. EP-055

Figure 1B

Dimensions in Millimeters (Based on 1" = 25.40 mm)

Dimensions in Inches

Dwg. MP-005 in

Dwg. MP-005 mm

A

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

MOTOR DRIVERS SELECTION GUIDE

Function

Output Ratings *Part Number ?

INTEGRATED CIRCUITS FOR BRUSHLESS DC MOTORS

3-Phase Controller/Drivers ±2.0 A 45 V 2936 and 2936-120 Hall-Effect Latched Sensors 10 mA 24 V 3175 and 3177 2-Phase Hall-Effect Sensor/Controller 20 mA 25 V 3235 Hall-Effect Complementary Output Sensor 20 mA 25 V 3275 2-Phase Hall-Effect Sensor/Driver 900 mA 14 V 3625 2-Phase Hall-Effect Sensor/Driver 400 mA 26 V 3626 Hall-Effect Comp. Output Sensor/Driver 300 mA 60 V 5275 3-Phase Back-EMF Controller/Driver ±900 mA 14 V 8902–A 3-Phase Controller/DMOS Driver ±4.0 A 14 V 8925 3-Phase Back-EMF Controller/Driver ±1.0 A 7 V 8980 and 8983

INTEGRATED BRIDGE DRIVERS FOR DC AND BIPOLAR STEPPER MOTORS

PWM Current Controlled Dual Full Bridge ±750 mA 45 V 2916 PWM Current Controlled Dual Full Bridge ±1.5 A 45 V 2917 PWM Current Controlled Dual Full Bridge ±1.5 A 45 V 2918 PWM Current Controlled Dual Full Bridge ±750 mA 45 V 2919 Half-Bridge Driver ±1.0 A 24 V 2943 Dual Full Bridge Driver ±2.0 A 50 V 2998 PWM Current Controlled Full Bridge ±2.0 A 50 V 3952 PWM Current Controlled Full Bridge ±1.3 A 50 V 3953 PWM Current Controlled Dual Full Bridge ±800 mA 45 V 3961 PWM Current Controlled Dual Full Bridge ±800 mA 30 V 3962

OTHER INTEGRATED CIRCUIT MOTOR DRIVERS

Unipolar Stepper Motor Quad Driver 1.8 A 50 V 2544 Unipolar Stepper-Motor Translator/Driver 1.25 A 50 V 5804 Unipolar Stepper-Motor Quad Driver 1 A 46 V 7024 and 7029 Unipolar Microstepper-Motor Quad Driver 1.2 A 46 V 7042 Voice-Coil Motor Driver ±500 mA 6 V 8932-A Voice-Coil Motor Driver ±800 mA 16 V 8958 Voice-Coil (and spindle) Motor Driver ±350 mA 7 V 8980 and 8983*

Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining

voltage limits or over-current protection voltage limits.

Negative current is defined as coming out of (sourcing) the output.

?

Complete part number includes additional characters to indicate operating temperature range and package style.

Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the design of its products. Components made under military approvals will be in accordance with the approval requirements.

The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.