ChipFind - документация

Электронный компонент: U6803B-FP

Скачать:  PDF   ZIP
U6803B
TELEFUNKEN Semiconductors
Rev. A4, 28-Apr-97
1 (6)
Triple-Driver with Thermal Monitoring
Description
The triple-driver IC includes three non inverted and
current limited output stages with an open collector.
Common thermal shutdown protects outputs against
critical junction temperature. Each output can sink
20 mA, parallel output operation is possible. The digital
inputs have Schmitt-trigger function with pull-up current
sources to 5 V.
Features
D Three input comparators with Schmitt-trigger
characteristic
D Input clamping current capability to"10 mA
D Integrated protection cells (EMC, ESD, RF)
dedicated to all input stages
D Common shutdown by junction temperature monitor
D Low voltage reset with hysteresis
D ESD protection to human body model:
"2000 V (C = 100 pF, R = 1.5 kW)
D Output stages:
Short circuit protected with diode
Load-dump protected @ 1 k
W
No crosstalk on adjacent channels
Clamping current @ 2 mA
Jump start possible
Ordering Information
Extended Type Number
Package
Remarks
U6803BFP
SO8
Block Diagram / Applications
Under
voltage
detection
V
S
=5 V
7
1
3
V
O1
4
8
5
6
2
V
O2
V
O3
V
S
V
S
V
I1
V
I2
V
I3
GND
13332
Thermal
shutdown
Figure 1.
U6803B
TELEFUNKEN Semiconductors
Rev. A4, 28-Apr-97
2 (6)
Pin Configuration
1
2
3
4
8
7
6
5
V
O1
GND
V
O2
V
O3
V
I1
V
S
V
I2
V
I3
13330
Figure 2. Pinning
Pin
Symbol
Function
1
V
O1
Output 1
2
GND
Ground
3
V
O2
Output 2
4
V
O3
Output 3
5
V
I3
Input 3
6
V
I2
Input 2
7
V
S
Supply voltage 5 V
8
V
I1
Input 1
Basic Circuitry
Integrated circuit, U6803B, requires a stabilized supply
voltage (V
S
= 5 V
"5%) to comply with its electrical
characteristics. An external buffer capacitor of C = 100 nF
value is recommended. An integrated 14-V Zener-diode
between V
S
and ground protects the supply pin.
All input stages are provided with an integrated 250 k
W
pull-up resistor and can be directly connected to a micro-
controller.
All output stages are open collectors each capable of
sinking 20 mA. Recommended external components:
Pull-up resistor, R = 1 k
W
Capacitor to GND, C = 470 pF, see figure 2
Functional Description
General
ON state: Low level at the input stage activates the
corresponding output stage.
OFF state: The internal pull-up resistor gives high level
to the input comparator and deactivates the output stage
7-V Zener-diodes between each input pin and GND are
capable of
"10 mA clamping currents without crosstalk
on adjacent input stages.
A total clamping current of
"30 mA should be observed
with respect to the power dissipation.
Current Limitation of the Output Stages
and Overtemperature Shut-down
A temperature dependent current limitation between
25 and 100 mA protects the stages during a short.
Additionally the chip temperature is monitored. For T
chip
> 148
_C all outputs are disabled and automatically
enabled with a hysteresis of T
Chip
> 5
_C.
Transients and Load-Dump
An integrated 28-V Zener-diode protects each output
stage against transients and load-dump (Schaffner
pulses). With the help of external 1 k
W resistor , the output
transistor is capable of the corresponding current which
flows during each of these conditions. Apart from that,
outputs are short circuit and overload protected.
Low Voltage Detection
When supply voltage is switched on, a power-on reset
pulse is generated internally, which disables all output
stages until a defined supply voltage level is reached. The
low voltage detection is provided with a hysteresis of
V
hyst
= 0.5 V typically.
U6803B
TELEFUNKEN Semiconductors
Rev. A4, 28-Apr-97
3 (6)
V
S
=5 V
V
I1
V
I2
V
I3
Tripledrive IC
U6803B
V
O1
V
O2
V
O3
C
C
C
R
R
R
V
Batt
3x 1k
3x 470 pF
Load
100 nF
Micro
controller
13333
Figure 3. Application schematic
Absolute Maximum Ratings
Parameters
Symbol
Value
Unit
Supply voltage
V
S
7.0
V
Ambient temperature range
T
amb
40 to +125
_C
Storage temperature range
T
stg
50 to +150
_C
Maximum junction temperature
T
j
+150
_C
Thermal Resistance
Parameters
Symbol
Value
Unit
Junction ambient
R
thJA
120
K/W
U6803B
TELEFUNKEN Semiconductors
Rev. A4, 28-Apr-97
4 (6)
Electrical Characteristics
V
S
= 5 V
"5%, T
amb
= 27
_C, reference point pin 2 (GND), unless otherwise specified, see figures 1 and 3.
Parameters
Test Conditions / Pins
Symbol
Min.
Typ.
Max.
Unit
Supply
Pin 7
Supply voltage
V
S
4.75
5.25
V
Supply current
Inputs open
Inputs closed to GND
I
S
I
S
0.8
7
3.2
13
mA
mA
Low voltage detection
threshold:
ON
OFF
V
TH(ON)
V
TH(OFF)
3.7
3.0
4.6
3.8
V
V
Low voltage hysteresis
V
hyst
0.55
1.05
V
Temperature shut down
T
Chip
140
149
_C
Temperature shut down
hysteresis
T
hyst
5
_C
Input
Pins 5, 6, 8
Zener-diode protection
voltage
V
I
6.7
8.5
V
Zener-diode clamping
current
I
I
"10
mA
Pull-up resistor
R
I
170
250
305
k
W
Switching threshold
OFF
ON
V
I
V
I
3.3
1.8
V
V
Hysteresis
V
hyst
1.5
V
Output
Pins 1, 3, 4
Zener-diode protection
voltage
V
O
26.5
V
Integrated capacitor
5
pF
Leakage current
I
Leak
2.5
mA
Saturation voltage
(I = 20 mA)
V
Sat
0.7
V
Current limitation
I
limit
25
mA
Propagation delay
(470 pF, 1 k
W, 20 V)
t
d
5
ms
U6803B
TELEFUNKEN Semiconductors
Rev. A4, 28-Apr-97
5 (6)
Package Information
13034
technical drawings
according to DIN
specifications
Package SO8
Dimensions in mm
5.00
4.85
0.4
1.27
3.81
1.4
0.25
0.10
5.2
4.8
3.7
3.8
6.15
5.85
0.2
8
5
8
5