Freescale Semiconductor
Technical Data
Document Number: MC33887
Rev. 14.0, 3/2011
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 pin 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.
Operation with voltages up to 40 V with derating of the specifications.
Features
•
•
•
•
•
•
•
•
Fully specified operation 5.0 V to 28 V
Limited operation with reduced performance up to 40 V
120 mΩ R
DS(ON)
Typical H-Bridge MOSFETs
TTL/CMOS Compatible Inputs
PWM Frequencies up to 10 kHz
Active Current Limiting (Regulation)
Fault Status Reporting
Sleep Mode with Current Draw
≤50 μA
(Inputs Floating or Set
to Match Default Logic States)
6.0 V
V+
Device
MC33887APVW/R2
MC33887PFK/R2
MC33887PEK/R2
33887
H-BRIDGE
VW SUFFIX (Pb-FREE)
98ASH70702A
20-PIN HSOP
FK SUFFIX
98ASA10583D
36-PIN PQFN
Bottom View
EK SUFFIX (Pb-FREE)
98ASA10506D
54-PIN SOICW-EP
ORDERING INFORMATION
Temperature
Range (T
A
)
-40°C to 125°C
Package
20 HSOP
36 PQFN
54 SOICW-EP
33887
CCP
IN
OUT
FS
EN
IN1
IN2
D1
D2
FB
OUT2
PGND
AGND
MOTOR
V+
OUT1
MCU
OUT
OUT
OUT
OUT
A/D
Figure 1. 33887 Simplified Application Diagram
Freescale Semiconductor, Inc. reserves the right to change the detail specifications,
as may be required, to permit improvements in the design of its products.
© Freescale Semiconductor, Inc., 2007 - 2011. All rights reserved.
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
CCP
VPWR
EN
CHARGE PUMP
8
μ
A
(
EACH
)
5.0 V
REGULATOR
CURRENT
LIMIT,
OVERCURRENT
SENSE &
FEEDBACK
CIRCUIT
OUT1
GATE
DRIVE
OUT2
IN1
IN2
D1
D2
25
μ
A
CONTROL
LOGIC
OVER
TEMPERATURE
UNDERVOLTAGE
FS
FB
AGND
PGND
Figure 2. 33887 Simplified Internal Block Diagram
33887
2
Analog Integrated Circuit Device Data
Freescale Semiconductor
PIN CONNECTIONS
PIN CONNECTIONS
Tab
AGND
FS
IN1
V+
V+
OUT1
OUT1
FB
PGND
PGND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
EN
IN2
D1
CCP
V+
OUT2
OUT2
D2
PGND
PGND
Tab
Figure 3. 33887 Pin Connections
Table 1. 33887 HSOP PIN DEFINITIONS
A functional description of each pin can be found in the
Functional Pin DescriptionS
section,
page 21.
Pin
1
2
Pin Name
AGND
FS
Formal Name
Analog Ground
Fault Status for H-Bridge
Definition
Low-current analog signal ground.
Open drain active LOW Fault Status output requiring a pull-up resistor to
5.0 V.
Logic input control of OUT1 (i.e., IN1 logic HIGH = OUT1 HIGH).
Positive supply connections
Output 1 of H-Bridge.
Current sensing feedback output providing ground referenced 1/375th
(0.00266) of H-Bridge high-side current.
High-current power ground.
Active LOW input used to simultaneously tri-state disable both H-Bridge
outputs. When D2 is Logic LOW, both outputs are tri-stated.
Output 2 of H-Bridge.
External reservoir capacitor connection for internal charge pump capacitor.
Active HIGH input used to simultaneously tri-state disable both H-Bridge
outputs. When D1 is Logic HIGH, both outputs are tri-stated.
Logic input control of OUT2 (i.e., IN2 logic HIGH = OUT2 HIGH).
Logic input Enable control of device (i.e., EN logic HIGH = full operation, EN
logic LOW = Sleep Mode).
Exposed pad thermal interface for sinking heat from the device.
Note
Must be DC-coupled to analog ground and power ground via very low
impedance path to prevent injection of spurious signals into IC substrate.
3
4 , 5, 16
6, 7
8
IN1
V+
OUT1
FB
Logic Input Control 1
Positive Power Supply
H-Bridge Output 1
Feedback for H-Bridge
9 – 12
13
PGND
D2
Power Ground
Disable 2
14 , 15
17
18
OUT2
CCP
D1
H-Bridge Output 2
Charge Pump Capacitor
Disable 1
19
20
IN2
EN
Logic Input Control 2
Enable
Tab/Pad
Thermal
Interface
Exposed Pad Thermal
Interface
33887
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
PIN CONNECTIONS
Transparent Top View of Package
36
35
34
33
32
31
30
29
CCP
V+
V+
OUT2
OUT2
NC
OUT2
OUT2
NC
D1
IN2
EN
V+
V+
NC
AGND
FS
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
28
27
26
25
24
23
22
21
20
19
NC
D2
PGND
PGND
PGND
PGND
PGND
PGND
FB
NC
Figure 4. 33887 Pin Connections
Table 2. PQFN PIN DEFINITIONS
A functional description of each pin can be found in the
Functional Pin DescriptionS
section,
page 21.
Pin
1, 7, 10, 16,
19, 28, 31
2
3
4
5, 6, 12, 13, 34, 35
8
9
11
14, 15, 17, 18
20
21– 26
27
29, 30, 32, 33
36
Pad
Pin Name
NC
D1
IN2
EN
V+
AGND
FS
IN1
OUT1
FB
PGND
D2
OUT2
CCP
Thermal
Interface
Formal Name
No Connect
Disable 1
Logic Input Control 2
Enable
Positive Power Supply
Analog Ground
Fault Status for H-Bridge
Logic Input Control 1
H-Bridge Output 1
Feedback for H-Bridge
Power Ground
Disable 2
H-Bridge Output 2
Charge Pump Capacitor
Exposed Pad Thermal
Interface
Definition
No internal connection to this pin.
Active HIGH input used to simultaneously tri-state disable both H-Bridge
outputs. When D1 is Logic HIGH, both outputs are tri-stated.
Logic input control of OUT2 (i.e., IN2 logic HIGH = OUT2 HIGH).
Logic input Enable control of device (i.e., EN logic HIGH = full operation,
EN logic LOW = Sleep Mode).
Positive supply connections.
Low-current analog signal ground.
Open drain active LOW Fault Status output requiring a pull-up resistor to
5.0 V.
Logic input control of OUT1 (i.e., IN1 logic HIGH = OUT1 HIGH).
Output 1 of H-Bridge.
Current feedback output providing ground referenced 1/375th ratio of
H-Bridge high-side current.
High-current power ground.
Active LOW input used to simultaneously tri-state disable both H-Bridge
outputs. When D2 is Logic LOW, both outputs are tri-stated.
Output 2 of H-Bridge.
External reservoir capacitor connection for internal charge pump
capacitor.
Exposed pad thermal interface for sinking heat from the device.
Note:
Must be DC-coupled to analog ground and power ground via very
low impedance path to prevent injection of spurious signals into IC
substrate.
33887
IN1
V+
V+
OUT1
OUT1
NC
OUT1
OUT1
4
Analog Integrated Circuit Device Data
Freescale Semiconductor
PIN CONNECTIONS
Transparent Top View of Package
PGND
PGND
PGND
PGND
NC
NC
NC
D2
NC
OUT2
OUT2
OUT2
OUT2
NC
V+
V+
V+
V+
NC
NC
NC
NC
CCP
D1
IN2
EN
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
.35
34
33
32
31
30
29
28
PGND
PGND
PGND
PGND
NC
NC
NC
FB
NC
OUT1
OUT1
OUT1
OUT1
NC
V+
V+
V+
V+
NC
NC
NC
NC
IN1
FS
AGND
NC
NC
Figure 5. 33887 Pin Connections
Table 3. SOICW-EP PIN DEFINITIONS
A functional description of each pin can be found in the
Functional Pin DescriptionS
section,
page 21.
Pin
1– 4, 51– 54
5 – 7, 9, 14, 19 – 22,
27 – 29, 33 – 36, 41,
46, 48 – 50
8
Pin Name
PGND
NC
Formal Name
Power Ground
No Connect
High-current power ground.
No internal connection to this pin.
Definition
D2
Disable 2
Active LOW input used to simultaneously tri-state disable both H-Bridge
outputs. When D2 is Logic LOW, both outputs are tri-stated.
Output 2 of H-Bridge.
Positive supply connections.
External reservoir capacitor connection for internal charge pump
capacitor.
Active HIGH input used to simultaneously tri-state disable both H-Bridge
outputs. When D1 is Logic HIGH, both outputs are tri-stated.
Logic input control of OUT2 (i.e., IN2 logic HIGH = OUT2 HIGH).
Logic input Enable control of device (i.e., EN logic HIGH = full operation,
EN logic LOW = Sleep Mode).
Low-current analog signal ground.
Open drain active LOW Fault Status output requiring a pull-up resistor to
5.0 V.
Logic input control of OUT1 (i.e., IN1 logic HIGH = OUT1 HIGH).
10 – 13
15 – 18, 37 – 40
23
OUT2
V+
CCP
H-Bridge Output 2
Positive Power Supply
Charge Pump Capacitor
24
D1
Disable 1
25
26
IN2
EN
Logic Input Control 2
Enable
30
31
AGND
FS
Analog Ground
Fault Status for H-Bridge
32
IN1
Logic Input Control 1
33887
Analog Integrated Circuit Device Data
Freescale Semiconductor
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