MIC4807
Micrel
MIC4807
80V 8-Channel Addressable Low-Side Driver
General Description
The MIC4807 is an 80V, 8-channel, addressable low side
driver with latches and TTL/CMOS compatible logic inputs.
Each logic input is composed of a comparator with a 1.4V
bandgap-derived reference serving as the trip point. The
addresses (A
IN
, B
IN
, and C
IN
) and Data-in logic inputs have an
internal 50µA pull-up current source, while the Output Enable
(OE), Chip Select (CS), and Clear logic inputs have an
internal 75µA pull-down sink. If the logic lines to the MIC4807
are severed, these currents guarantee that the outputs will
turn OFF.
Individual latches in the MIC4807 are selected by a binary
address presented at inputs A
IN
, B
IN
, and C
IN
. Data-in is
directed to the addressed latch while CS is held low, allowing
an individual output to be pulse-width modulated. When CS
is set high again, the last Data-in is stored in the latch. If Data-
in = "1", the addressed output is turned on, and if Data-in = "0",
the addressed output is turned off.
Information presented to Data-in and the address inputs is
transferred to the latches while CS is pulled low. For
application, where several outputs must be
(Continued)
Features
•
•
•
•
•
•
•
•
•
4.5V to 16V Operation
Eight 80V 100mA Outputs
Off-state Leakage less than 10µA at 25°C
Short-Circuit Proof
Thermal Shutdown with Hysteresis
DMOS Output Devices (R
ON
≤
7Ω at 25°C)
Lamp Drivers
Solenoid Drivers
Display Drivers
-Electroluminescent
-Vacuum Fluorescent
-Plasma
Relay Drivers
Print Head Drivers
Heater Drivers
Power Semiconductor Drivers
Security Systems
Environmental Controls
Process Controllers
Applications
•
•
•
•
•
•
•
Pin Diagram
HVOUT
2
1
HVOUT
3
2
V
DD
3
OE
Ground
CS
Clear
HVOUT
4
HVOUT
5
5
6
7
8
9
18
HVOUT
1
17
HVOUT
0
Ordering Information
Part
Number
MIC4807BN
Operating
Temperature-Range
-40°C to 85°C
Package
18-Pin Plastic DIP
7
16
Data-in
4
MIC4807
15
A
IN
14
B
IN
13
C
IN
12
V
DD
11
HVOUT
7
10
HVOUT
6
Block Diagram
V
DD
12
Thermal
Shutdown
Current
Limit
17
18
1
HVOUT
0
HVOUT
1
HVOUT
2
HVOUT
3
HVOUT
4
HVOUT
5
HVOUT
6
HVOUT
7
Addressing
{
A
IN
15
B
IN
14
C
IN
13
Address
Decoder
Latches
Data-in 16
Ground 5
6
CS
7
Clear
Driver
•
•
•
•
•
•
Driver
2
8
9
10
11
4
OE
October 1998
7-3
MIC4807
Micrel
When operated below current limit, the outputs appear as
small-valued resistors (typically 5.1Ω at 25°C) connected to
ground. The "ON" resistance (R
ON
) has a strong, positive
temperature coefficient (approximately 7500 ppm/°C) which
promotes current sharing if two or more outputs are paral-
leled.
General Description
(Continued)
turned on simultaneously, Gray Code address sequencing
can be applied to Ain, Bin, Cin, while Data-in is held high and
CS is held low. Data-in will be transferred to each address in
turn, without the need to toggle CS. Similarly, a set of outputs
could be simultaneously turned off by setting Data-in low.
Gray Code ensures that no intermediate addresses are
inadvertently accessed. A typical Gray Code is 0, 1, 3, 2, 6,
7, 5, 4.
Each output drive circuit has a high-voltage, power DMOS
device configured as a transconductance loop. This loop
limits the output current to typically 200mA. While current
limiting keeps the output device within its allowable safe-
operating area (SOA), the power dissipation may be exces-
sive. Long-term survival is guaranteed by thermal shutdown.
Absolute Maximum Ratings
(Notes 1, 2 and 3)
Output Voltage (V
OUT
, OFF)
100V
Supply Voltage (V
DD
)
16.5V
Logic Input Voltage (V
IN
)
–0.3V TO V
DD
+ 0.3
Continuous Output Current (I
OUT
)
Internally Limited
Power Dissipation (P
D
, Note 2)
Internally Limited
Ambient Temperature (T
A
):
–40°C to +85°C
Maximum Junction Temperature (T
JMAX
)
150°C
Storage Temperature
–65°C to +150°C
θ
JA
- Plastic DIP
130°C/W
Electrical Characteristics:
Test Circuit).
(Note 6) MIC4807BN, T
A
= 25°C, V
DD
= 15V unless otherwise specified (see
Symbol
V
DD
I
DD
Parameter
Supply Voltage
Supply Current
Conditions
Min
4.5
Typ
Max
16
Units
V
mA
mA
V
V
OE = L (Note 3)
OE = H (Note 4)
4.5V
≤
V
DD
≤
16V
2.0
5.5
1.5
10
3
0.8
V
IN
(0)
V
IN
(1)
I
IN
(0)
Logic Input Voltage
Logic Input Current for A
IN
,
B
IN
, C
IN
, and Data-in
Logic Input Current for CS,
OE, and Clear
Output Leakage Current
Output "ON" Resistance
Short Circuit Current
V
IN
= 0V
–150
–70
–25
µA
µA
µA
Ω
mA
I
IN
(1)
V
IN
= V
DD
25
130
250
I
OUT
R
ON
I
SC
OE = 0V, V
OUT
= 80V
Output is ON, V
OUT
= 0.7V,V
DD
= 10V
Output is ON< V
OUT
= 50V
10V
≤
V
DD
≤
15V (Note 5)
140
1
5.1
190
10
7
250
V
OUT
V
OUT
Output Voltage (OFF)
Output Voltage (ON)
I
OUT
= 50mA,V
DD
= 10V
I
OUT
= 100mA, V
DD
= 10V
V
DD
= 10V for all timing tests
(A, see
Timing Diagram)
(B)
400
0.26
0.51
80
0.35
0.7
V
V
V
ns
Data and Address
Set-up Time
Data and Address
Hold Time
CS Pulse Width
Turn-on Delay
50
ns
(C)
(D)
500
2.5
ns
ns
7-4
October 1998
MIC4807
Micrel
(Note 6) T
A
= 25°C, V
DD
= 15V unless otherwise specified (see Test Circuit).
Conditions
(E)
(F)
Min
Typ
Max
2.5
2
Units
µs
µs
µs
µs
ns
Electrical Characteristics:
Symbol
Parameter
Turn-Off Delay
Output Disable
Response Time
Output Enable
Response Time
Clear Response Time
Clear Pulse Width
(G)
2
(H)
(I)
500
2.5
Electrical Characteristics:
Circuit).
Symbol
V
DD
I
DD
Parameter
Supply Voltage
Supply Current
(Note 6) T
A
= –55°C to +125°C, V
DD
= 15V unless otherwise specified (see Test
Conditions
Min
4.5
Typ
Max
16
15
4
0.8
Units
V
mA
mA
V
V
OE = L (Note 3)
OE = H (Note 4)
4.5V
≤
V
DD
≤
16V
2.0
V
IN
(0)
V
IN
(1)
I
IN
(0)
Logic Input Voltage
Logic Input Current for A
IN
,
B
IN
, C
IN
, and Data-in
Logic Input Current for CS,
OE, and Clear
Output Leakage Current
Output "ON" Resistance
Short Circuit Current
V
IN
= 0V
–250
–10
µA
µA
µA
Ω
mA
I
IN
(1)
V
IN
= V
DD
25
400
7
I
OUT
R
ON
I
SC
OE = 0V, V
OUT
= 80V
Output is ON, V
OUT
=0.7V,V
DD
=10V
Output is ON< V
OUT
= 50V
10V
≤
V
DD
≤
15V (Note 5)
100
5.1
7
12
300
V
OUT
V
OUT
Output Voltage (OFF)
Output Voltage (ON)
I
OUT
= 50mA,V
DD
= 10V
I
OUT
= 100mA, V
DD
= 10V
V
DD
= 10V for all timing tests
(A, see
Timing Diagram)
(B)
700
80
0.6
1.2
V
V
V
ns
Data and Address
Set-up Time
Data and Address
Hold Time
CS Pulse Width
Turn-on Delay
50
ns
(C)
(D)
1000
5
ns
µs
October 1998
7-5
MIC4807
Micrel
(Note 6) T
A
= 25°C, V
DD
= 15V unless otherwise specified (see Test Circuit).
Conditions
(E)
(F)
Min
Typ
Max
5
4
Units
µs
µs
µs
µs
ns
Electrical Characteristics:
Symbol
Parameter
Turn-Off Delay
Output Disable
Response Time
Output Enable
Response Time
Clear Response Time
Clear Pulse Width
(G)
4
(H)
(I)
1000
5
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not
apply when operating the device beyond its specified operating ratings.
Note 2:
The junction temperature is internally limited by a thermal shutdown circuit. The maximum power dissipation is a function of
T
JMAX
,
θ
JA
, and T
A
. The maximum allowable power dissipation at any ambient temperature is P
D
= (T
JMAX
- T
A
) /
θ
JA
. If this dissipation
is exceeded, the die temperature will rise above 150°C, and the MIC4807 will go into thermal shutdown.
Note 3:
All outputs are off when
OUTPUT ENABLE
is pulled low.
Note 4:
All outputs are turned on during this test.
Note 5:
Pulse testing is used to avoid thermal shutown.
Note 6:
Minimum and Maximum limits are tested and 100% guaranteed over the temperature range specified. Typicals are measured
at 25°C and represent the most likely parametric norm.
Timing Diagram
Logic "1"
Logic "0"
C
IN
B
IN
A
IN
Data-in
CS
C
H
G
D
F
H
D
E
A
B
Clear
OE
HVOUT
0
HVOUT
1
HVOUT
2
HVOUT
3
HVOUT
4
OFF
ON
7-6
October 1998
MIC4807
Micrel
Test Circuit and AC Waveform Measurement Standards
V
OUT
3
V
OUT
2
1
2
18
17
16
V
OUT
1
V
OUT
0
R
V
IN
C = 35pF
R = 10kΩ
R
C
R
C
R
C
R
C
C
R
C
R
C
R
C V
DD
=10V
V
DD
V
IN
3
4
5
6
7
8
9
MIC4807
15
14
13
12
11
10
V
IN
V
OUT
7
V
OUT
6
V
OUT
5
V
OUT
4
V
IN
5V
0V
t
Delay
All reference times are taken
from the 50% transition point.
10V
V
OUT
0V
7
October 1998
7-7
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