MC33385 [MOTOROLA]
Automotive Quad Low Side Driver; 汽车四通道，低侧驱动器
| 型号： | MC33385 |
| 厂家： | 
MOTOROLA |
| 描述： | Automotive Quad Low Side Driver |
| 文件： | 总11页 (文件大小：372K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MOTOROLA
SEMICONDUCTOR
Freescale Semiconductor, Inc.
MC33385
Automotive Quad
Low Side Driver
QUAD LOW SIDE DRIVER
SEMICONDUCTOR
TECHNICAL DATA
The MC33385 is a Quad Low Side Driver fully protected switch. This
device is a general purpose Low Side Driver but has been especially
designed to operate in engine management application as injector
driver or automotive gear box. It is interfaced directly with a
microcontroller for parallel control of the load and the individual output
diagnostic is done through a SPI. The diagnostic logic recognizes 4
failure types at each output stage the overcurrent, the short to GND, the
openload and the over-temperature.
DH SUFFIX
HSOP20 PACKAGE
PIN ASSIGNMENT
• RDSON of 250mW per Output at 25°C
• Supplied from the main 5V Vcc
• Input CMOS Compatible
• Diagnostic through SPI
• Nominal Current of 2A per Output
21
GND1
OUT1
GND2
OUT2
N.C
1
20
19
2
3
18 N.C
• Current Limitation at 3A with Automatic Turn Off
• Output Internally Clamped at 50V typ for Inductive Load Drive
• Junction to Case Thermal Resistance of 4.4°C/W
• Individual Output over Temperature Shutdown
NON1
NON2
SDI
4
5
17
16 SDO
Heat sink
6
7
15 NRES
CLK
VCC
NCS
14
3
1
NON3
NON4
OUT4
GND4
8
9
12 OUT3
GND3
10
11
21
ORDERING INFORMATION
Temperature
Range
Device
Package
MC33385DH
-40
°
C to +125
°
C
HSOP20
Simplified Block Diagram
VCC
Charge Pump
TRIGGER
NON1
NON2
NON3
NON4
OUT1
OUT2
S
URES
RES
dv/dt control
DRIVER
OUT3
OUT4
R
RES
Over-temp. detection
URES
ON1
FR Reset
IRES
VCC
VCC
VCC
I-SCB filter
t-ISCB
ON1
SDI
I-OL filter
t-IOL
CLK
NON1
SCG filter
t-SCG
Failure
Register
(FR)
Shift
Register
Vref
NCS
SDO
URES
RES
OSC
IRES
Under Voltage
Reset
Reset
Oscillator
For More Information On This Product,
GND
Go to: www.freescale.coNmRES
Ó Motorola,Inc 1999
Rev 5.1
Freescale SMeCm33i3c85onductor, Inc.
MAXIMUM RATINGS TJ = - 40°C up to 150°C
Ratings
Symbols
Min
Max
Unit
SUPPLY VOLTAGE
Voltage Range
Vcc
- 0.3
- 0.3
- 10
7
V
OUTPUTS : 1...4
Continuous Output Voltage (With no reverse current)
Continuous Current
V
45
V
out
I
A
A
outc
2.5
Peak Output Current
I
I
SCBmax
outp
Clamped Energy at the Switching OFF (See figure 6)
INPUTS
W
70
mJ for 1ms
OFF
Input Voltage (Inputs)
V
- 0.3
- 20
Vcc + 0.3
1
V
IN
Input Protection Diode Current
OUTPUTS : SDO
I
mA
IN
Input Voltage (Outputs)
V
- 0.3
- 20
Vcc + 0.3
1
V
o
Input Protection Diode Current
THERMAL RATINGS
I
mA
o
Operating Junction Temperature
Thermal Resistance : Junction-case (One powerstage in use)
T
- 40
150
4.5
50
°C
j
R
K/W
K/W
thjc
Thermal Resistance : Junction-ambient (Device soldered on
printed circuit board)
R
thja
RANGE OF FUNCTIONALITY Tcase = - 40°C up to 125°C
Ratings
Symbols
Min
Max
Unit
SUPPLY VOLTAGE
Supply Voltage Range
V
4.5
5.5
V
cc
JUNCTION TEMPERATURE
Junction Temperature Continuous (Continuous)
Junction Temperature Dynamical (Time limited)
OUTPUT CURRENT
T
- 40
150
185
°C
°C
j1
T
j2
Output Current Range
I
I
out
SCBmax
RESET BEHAVIOUR
Reset Changeable (at NRES-Pin)
V
V
5.5
V
V
cc
ccRES
Undervoltage Reset (Independent of NRES)
Active for Vcc = 0V to VccPRO
V
3.35
3.95
ccRES
UNDERVOLTAGE PROTECTION
Protection active for Vcc=0V to Vccpro
OVER TEMPERATURE
V
1.5
4.0
V
ccPRO
Temperature Detection Threshold
T
OFF
155
185
°C
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Freescale SMeCm33i3c85onductor, Inc.
ELECTRICAL CHARACTERISTICS TCASE = - 40° up to + 125°C and VCC = 4.5V up to 5.5V
Parameters
Symbol
Min
Typ
Max
Unit
SUPPLY CURRENT
Standby Current (without load) (NON1...NON4 = High Level)
5.15V ³ V
I
6
7
mA
mA
CC
ccSTB1
5.5V ³ V
I
ccSTB2
CC
Operating Mode (For 5.15V ³ V ) (Iout 1...4) = 2A
I
17
mA
CC
ccOPM
DI During Reverse Output Current
(Iout = - 5A on one output)
DI
100
50
mA
mA
cc
cc
INPUTS
NONx, NCS, CLK, NRES, SDI
Low Threshold
VINL
VINH
-0.3
0.7*Vcc
0.85
0.2*V
V
V
cc
High Threshold
V
+ 0.3
cc
Hysteresis
V
V
hyst
Input Current (Vin = Vcc)
IIN
IIN
fIN
10
mA
mA
Hz
Input Current (Vcc >VRES & 0V<VIN < 0.9*Vcc)
Input Frequency (NON1 to NON4)
SERIAL DATA OUTPUT
- 100
0
- 20
1000
High Output Level (ISDO = -2mA)
Low Output Level (ISDO = 3.2mA)
Tristate Leakage Current (NCS = HIGH, VSDO = 0V to Vcc)
OUTPUTS (Out 1...4)
VSDOH
VSDOL
ISDOL
V
- 0.4
V
V
cc
0.4
10
- 10
mA
Average Output Current
I
2.5
A
outa
Output Peak Current
I
ISCBmax
A
outp
Leakage Current 1 (NON = High, Vout = 25V, Vcc = 5V)
Leakage Current 2 (NON = High, Vout = 16V, Vcc = 1V)
Output Clamp Voltage (Iout = 1A)
Matching Clamp Voltage (Between two outputs)
Clamped Energy at the Switching OFF (See graph 6)
On Resistance (Iout = 2A, Tj = 150°C, NON = LOW)
Output Low Voltage Limitation (Iout = 150mA)
Output Capacitance (Guaranteed by design)
OUTPUTS TIMING
I
10
10
58
mA
outL1
I
mA
outL2
V
45
Vclp-1
50
50
V
V
clp
V
Vclp+1
clpm
W
mJ for 1ms
mW
OFF
RDSON
Voutlim
Cout
500
220
350
65
mV
pF
Positive Output Voltage Ramp (with inductive load)
Vout = 4V... 16V
OVRp1
OVRp2
2
3
6
5
V/ms
V/ms
Vout = 16V... Vclp
3.5
10
Negative Output Voltage Ramp (25%... 75%)
OVRn
1.75
3
4
V/ms
ms
Internal Switch-on-Time Charge Pump
(NON = LOW... VGate = 0.9 * VBat)
t
40
dCP
Turn ON Delay
t
1
2.5
5
ms
dON
(NON = 50%, Vout = 0.9 * VBat)
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ELECTRICAL CHARACTERISTICS TCASE = - 40° up to + 125°C and VCC = 4.5V up to 5.5V
Parameters
Symbol
Min
Typ
Max
Unit
Turn OFF Delay
(NON = 50%, Vout = 0.1 * VBat)
(NON = 50%, Vout = 4V)
t
1
3
ms
ms
dOFFa
t
4.7
7.5
dOFFb
Undervoltage Protection
t
100
ms
rpON
Max ON time after a output voltage ramp from 0V to 25V at V
cc
= 0V...Vccpro
Matching Turn ON Delay
t
t
- 3
3
ms
mON
rOFF
(NON = 50%, Vout = 0.9 * VBat)
Rise time Turn OFF
8.5
12
(10% - 90% of V
)
clp
OUTPUTS REVERSE DIODE
Reverse Output Current
I
2,5
5
A
A
RD
Reverse Peakcurrent (Note 1 and 2)
Reverse Voltage Drop
I
RDP
- I
- I
= - 5A
= - 2,5A
V
V
1.0
0.85
1.7
1.7
V
V
out
out
RD1
RD2
POWERSTAGE PROTECTION
Short Current Limit
I
3.0
0.2
5
2
A
ms
V
SCB
SCB
ccmin
Short Circuit Delay Time
t
V
Undervoltage
V
3.35
3.95
cc
DIAGNOSTIC
Short to GND Threshold Voltage for I
Short to GND Filter Time
Open Load Threshold Current
Open Load Filter Time
£ 2A
V
0.390xVcc
140
0.435xVcc
250
V
OUT
REF
T
ms
SCG
I
10
50
mA
ms
OL
OL
t
140
250
Pull-up Resistor
R
2.0
8.0
kW
°C
OL
Temperature Detection Threshold
T
155
185
OFF
NOTES 1&2: For t £ 2ms. Max. reverse current is limited to - 10A (for all outputs together)
SERIAL DIAGNOSTIC LINK : Load Capacitor at SDI and SDO = 100pF
Clock Frequency (50% duty cycle)
Minimum Time CLK = HIGH
fclk
tclh
3
MHz
ns
100
100
Minimum Time CLK = LOW
tcll
ns
Propagation Delay (CLF Data at SDO valid)
NCS = LOW to Data at SDO Valid
tpcld
tpcld
tsclch
100
100
ns
ns
CLK Low Before NCS Low
100
ns
(Setup time CLK to NCS change H/L)
CLK Change L/H after NCS = Low
thclcl
tscld
100
20
ns
ns
SDI Input Set up Time
(CLK change H/Lafter SDI data valid)
SDI Input Hold Time (SDI data hold after CLK change H/L)
CLK Low Before NCS High
thcld
tsclcl
thclch
20
ns
ns
ns
150
150
CLK High After NCS High
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MC33385
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ELECTRICAL CHARACTERISTICS TCASE = - 40° up to + 125°C and VCC = 4.5V up to 5.5V
Parameters
Symbol
Min
Typ
Max
Unit
NCSL/H ti Output Data Flout
tpchdz
tpcld
100
10
ns
pF
ns
Capacitance at SDI, SDO, CLk, CS
NCS Filtertime (Pulses £ t
will be ignored)
t
10
40
fNCS
fNCS
DIAGNOSTIC REGISTER AND SPI TIMING
Figure1- Timing Diagram to Read the Diagnostic Register
NCS
CLK
SDO
FSL
LSB
D1
D2
D3
D4
D5
D6
MSB
SDI
LSB
D1
D2
D3
D4
D5
D6
MSB
FR-RESET
NOTE : FR -RESET means Reset failure storage (internal signal)
Figure2 - Diagnostic Failure Register Structure
MSB
LSB
D7
D6
D5
D4
D3
D2
D1
D0
FSL
FAILURE INDICATOR BIT
Only valid during NCS = LOW to
the first L to H CLK change
1 : failure stored
0 : no failure
STATUS CHANNEL 4
11 : no failure
01 : open circuit
10: short to battery or overtemperature
00 : short to gnd
STATUS CHANNEL 3
STATUS CHANNEL 2
STATUS CHANNEL 1
Figure3- Serial Interface Timing
NCS
tsclch
thclcl
tclh
tcll
tsclcl
thclch
CLK
tcsdv
tpcld
tpchdz
D7
SDO
SDI
FSL
D0
thcld
tcsdv
D0
D1
D7
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Figure 4 - Diagram to Short-Circuit to GNDFailure (SCG-Failure) Detection
Failure detection time
for an SCG failure
off
NON
on
SCG-failure
Vdrain
Vdrain < Vref at off-state
t-SCG (filter-time)
Filter time
Failure detection
Failure store
Figure5- Diagram to Open Load Failure (OL-Failure) Detection
Sporatical failure detection
Statical failure detection
Failure detection active
for an sporatical OL-failure
off
on
NON
I-OL
Iload
Iload > I-OL
Iload > IOL for t > tol
retrigger t filter
Diagnostic active
t-ol (filter-time)
t < t-ol
retrigger filter
tol
Sporatical failure-detection
Failure detection
Failure store
Figure6- Max Clamp- Energy Specification
350
- 40°C
300
250
200
150
100
50
25°C
125°C
0
0
0,5
1
1,5
2
2,5
3
3,5
4
Pulse-Duration (ms)
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MC33385
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DEVICE DESCRIPTION
Introduction
The device is a Quad Low Side Driver driven by four CMOS
input stages. Each output power transistor is protected against
short to VBAT and by a zener clamp against overvoltage.
The SCG failure will recognize when the drain voltage is lower
than the OL reference limit, while the output stage is switched
off. All four outputs have an independent overtemperature
detection and shutdown. All failures are stored in individual
registers.
They can be read by the microprocessor via the serial
interface. There is no failure detected if the powerstage
control time is shorter than the filter time.
A diagnostic logic recognizes four failure types at the
output stage : overcurrent, short to GND, open-load and
overtemperature.
The failures are individually stored in a byte which can be
read out via a serial interface (SPI).
Diagnostic Interface
Output Stage Control
The communication between the microprocessor and the
failure register runs via the SPI link. If there is a failure stored
in the failure register, the first bit of the shift register is set to a
high level. With the H/L change on the NCS pin the first bit of
the diagnostic shift register will be transmitted to the SDO
output. The SDO output is the serial output from the
diagnostic shift register and it is tristated when the NCS pin is
high. The CLK pin clocks the diagnostic shift register. New
SDO data will appear on every rising edge of this pin and new
SDI data will be latched on every CLK’ s falling edge into the
shift register. With the first positive pulse of the CLK, the
failure register will be cleared. There is no bus collision at a
small spike at the NCS. The CLK is always LOW while the
NCS-signal is changing.
Each of the four output stages is switched ON and OFF by
an individual control line (NON-Input). The logic level of the
control line is CMOS compatible. The output transistors are
switched off when the inputs are not connected.
Power Transistors
Each of the four output stages has its own zenerclamp.
This causes a voltage limitation at the power transistors when
inductive loads are switched off. Drain voltage ramp occurring
when output is switched on or off, is within defined limits.
Output transistors can be connected in parallel to increase
current capability. In this case, the associated inputs should
be connected together.
Short-Circuit and OvertemperatureProtection
If the output current increases above the short current limit
for a time longer than tSCB or if the temperature increases
Reset
There are two different reset functions realised :
Under voltage reset : as long as the Vcc voltage is lower than
above TOFF then the power transistor is immediately switched
VCCRES, the powerstages are switched off and the failure-
off. It remains switched off until the control signal on the NON-
Input is switched off and on again.
register are reseted.
Reset pin : as long as the NRES-pin is low, following circuits
are reseted :
Diagnostics
• Powerstages
• Failure register
Following failures at the output stage are recognized :
Short -Circuit to VBAt or overtemp...... = SCB (Highest priority)
Short -Circuit to GND............................. = SCG
Undervoltage Protection
At low Vcc voltage, the device remains switched off even if
there is a voltage ramp at the OUT pin.
Open Load................................................. = OL (Lowest priority)
The SCB failure is recognized by an overcurrent (current
above the short current limit) or an overtemperature.
If the current through the output stage is lower than the IOL-
reference, after a filter time an OL failure will be recognized.
This measurement is active while the powerstage is switched
on.
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7
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This device is dedicated to automotive applications such as engine managements systems, automatic gear box... It
interfaces between the microcontroller and the actuors of the system.
The loads can be only resistive or resistive and inductive such as injectors, EGR valves...etc... Following is an example of
application schematic, see figure below.
Figure7- Typical Application
VBat
Voltage
Regulator
Loads
47nF..150nF
NCS
CLK
Vcc GND1
GND2
GND3
GND4
SDI
SDO
MCU
NRES
NON1
NON2
NON3
NON4
MC33385
OUT1
OUT2
OUT3
OUT4
PINS FUNCTION DESCRIPTION
Pin No.
Function
Description
1
2
GND2
Ground 2
Output Channel 2
NC
OUT2
3
4
NON2
SDI
Input Control Signal for Channel 2
5
Serial Data Input
6
CLK
Clock Line for Serial Interface
7
NCS
Chip Select for Serial Interface
Input Control Signal for Channel 4
Output Channel 4
8
NON4
OUT4
GND4
GND3
OUT3
NON3
Vcc
9
10
11
12
13
14
15
16
17
18
19
20
Ground 4
Ground 3
Output Channel 3
Input Control Signal for Channel 3
5V Power Supply
NRES
SDO
Reset Input
Data Output of Serial Interface
Input Control Signal Channel 1
NC
NON1
OUT1
GND1
Case
Output Channel 1
Ground 1
Connected to the PCB Ground for Thermal Purposes
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Figure8- Standby Current versus Temperature
Figure9- Operating Mode Current versus
Temperature
3
12,50
2,75
2,50
12,00
11,50
2,25
2
11,00
10,50
Vcc=5,5V
1,75
10,00
Vcc=5,15V
1,50
1,25
1
9,50
9,00
8,50
Vcc=5,15V
All outputs=2A
-25 25
T, TEMPERATURE (°C)
-50
-25
0
25
50
75
100 125
-50
0
50
75
100 125
T, TEMPERATURE (°C)
Figure10- Low Threshold Input Voltage versus
Temperature
Figure11- High Threshold Input Voltage versus
Temperature
380
624
375
370
623
622
Vcc=5,5V
Vcc=4,5V
365
360
621
620
Vcc=4,5V ou 5,5V
355
619
350
345
340
618
617
616
-50
-25
0
25
50
75
100 125
-50
-25
0
25
50
75
100 125
T, TEMPERATURE (°C)
T, TEMPERATURE (°C)
Figure12- Output Clamp Voltage versus Temperature
Figure13 - Rdson versus Temperature
55,00
400
Vcc=4,5V
Iout1=3A
54,50
54,00
375
350
53,50
53,00
325
300
Iout1=1A
52,50
275
52,00
51,50
51,00
250
225
200
-50
-25
0
25
50
75
100 125
-50
-25
0
25
50
75
100
125
T, TEMPERATURE (°C)
T, TEMPERATURE (°C)
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Figure14- Open Load versus Temperature
Figure15- Vcc Undervoltage versus Temperature
3,78
24,50
24,25
3,77
3,76
24,00
23,75
23,50
3,75
3,74
23,25
23,00
3,73
3,72
3,71
3,70
22,75
22,50
-50
-25
0
25
50
75
100 125
-50
-25
0
25
50
75
100
125
T, TEMPERATURE (°C)
T, TEMPERATURE (°C)
Figure16- Short Current Limit versus Temperature
Figure17- Inductive Switching
4,60
I (200mA/div)
4,50
4,40
Clamp voltage
V (10V/div)
Vcc=5,5V
4,30
4,20
4,10
4,00
Vcc=4,5V
-25
3,90
3,80
-50
0
25
50
75
100 12
T, TEMPERATURE (°C)
Figure18- Turn on Delay
Figure19- Turn off Delay
In1 (1V/div)
Vout1(2V/div)
Vout1(2V/div)
tdon
tdoffa
tdoffb
In1 (1V/div)
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CASE OUTLINES
Motorola reserves the right to make changes without further notice to any products herein to improve reliability,
function or design. Motorola does not assume any liability arising out of the application or use of any product or circuit
described herein ; neither does it convert any licence under its patent rights of others. Motorola products are not
authorized for use as components in life support devices or systems intended for surgical implant into the body or
intended to support or sustain life. Buyer agrees to notify Motorola of any such intended end use whereupon Motorola
shall determine availability and suitability of its products for the use intended. Motorola and
are registered
trademarks of Motorola, Inc. Motorola, Inc. is an Equal Employment opportunity/Affirmative Action Employer.
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