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參數(shù)資料
| 型號： | 33887 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 5.0 A H-Bridge with Load Current Feedback |
| 中文描述： | 5.0的H -橋的負載電流反饋 |
| 文件頁數(shù)： | 1/28頁 |
| 文件大?。?/td> | 485K |
| 代理商： | 33887 |
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33887 Simplified Application Diagram
5.0 V
V+
MOTOR
MCU
33887
IN
OUT
OUT
OUT
OUT
OUT
A/D
OUT2
OUT1
V+
CCP
PGND
AGND
FS
IN1
IN2
EN
D1
D2
FB
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Motorola, Inc. 2004
Document order number: MC33887
Rev 9.0, 10/2004
33887
5.0 A H-Bridge with Load Current
Feedback
The 33887 is a monolithic H-Bridge Power IC with a load current feedback
feature making it ideal for closed-loop DC motor control. The IC incorporates
internal control logic, charge pump, gate drive, and low R
DS(ON)
MOSFET
output
circuitry. The 33887 is able to control inductive loads with continuous
DC load currents up to 5.0 A, and with peak current active limiting between
5.2 A and 7.8 A. Output loads can be pulse width modulated (PWM-ed) at
frequencies up to 10 kHz. The load current feedback feature provides a
proportional (1/375th of the load current) constant-current output suitable for
monitoring by a microcontroller’s A/D input. This feature facilitates the design
of closed-loop torque/speed control as well as open load detection.
A Fault Status output terminal reports undervoltage, short circuit, and
overtemperature conditions. Two independent inputs provide polarity control
of two half-bridge totem-pole outputs. Two disable inputs force the H-Bridge
outputs to tri-state (exhibit high impedance).
The 33887 is parametrically specified over a temperature range of
-40
°
C
≤
T
A
≤
125
°
C and a voltage range of 5.0 V
≤
V+
≤
28 V. The IC can also
be operated up to 40 V with derating of the specifications.
Features
5.0 V to 40 V Continuous Operation
120 m
R
DS(ON)
H-Bridge MOSFETs
TTL/CMOS Compatible Inputs
PWM Frequencies up to 10 kHz
Active Current Limiting (Regulation) via Internal Constant OFF-Time
PWM (with Temperature-Dependent Threshold Reduction)
Output Short Circuit Protection (Short to V+ or Short to GND)
Undervoltage Shutdown
Fault Status Reporting
Sleep Mode with Current Draw
≤
50
μ
A (Inputs Floating or Set to Match
Default Logic States)
Pb-Free Packaging Designated by Suffix Codes VW and PNB
5.0 A H-BRIDGE WITH LOAD
CURRENT FEEDBACK
ORDERING INFORMATION
Device
Temperature
Range (T
A
)
Package
MC33887DH/R2
-40°C to 125°C
-40°C to 125°C
-40°C to 125°C
20 HSOP
PC33887VW/R2
MC33887PNB/R2
36 PQFN
MC33887DWB/R2
54 SOICW-EP
DWB SUFFIX
CASE 1390-01
54-TERMINAL SOICW-EP
DH SUFFIX
VW (Pb-FREE) SUFFIX
CASE 979-04
20-TERMINAL HSOP
PNB (Pb-FREE) SUFFIX
CASE 1503-01
36-TERMINAL PQFN
Bottom View
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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