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PDF TLE6214L Data sheet ( Hoja de datos )
| Número de pieza | TLE6214L | |
| Descripción | Smart Dual Current Sense Switch | |
| Fabricantes | Infineon Technologies AG | |
| Logotipo |  |
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Preliminary Datasheet TLE 6214 L
Smart Dual Current Sense Switch
Basic Features
Product Summary
• Short circuit protection
• DMOS Overtemperature protection
Supply voltage
• Overvoltage protection
Drain source voltage
• Open load detection
On resistance
• Current limitation
• Low quiescent current mode
• 3,3V µC compatible input
• Electrostatic discharge (ESD) protection
VS
VDS(AZ)
RON
4.5 – 5.5 V
48 - 60 V
0.18 Ω
P-DSO-12-4
Specific Features
• Proportional load current sense
• IC Overtemperature warning
• 8-Bit SPI (for diagnosis and control)
• Short to GND detection
• Programmable overload behaviour
Ordering Code :Q....
General Description
Dual Current Sense Low-Side Switch in Smart Power Technology (SPT) with two open drain DMOS
output stages. The TLE 6214 L is protected by embedded protection functions and designed for auto-
motive applications. The output stages can be controlled directly by parallel inputs for PWM applica-
tions (e.g. Oxygen Probe Heater, Stepper Motor) or by SPI. All output stages can provide a load current
proportional sense signal. Diagnosis is done by an 8 bit SPI or by one status output per channel.
Block Diagram
VS
IS1/ IS2/
Fault / ST1
IN1
IN2
SI
SO / ST2
SCLK
CS
M ux
SPI
Interface
8 bit
GND
V2 Preliminary
Page 1
Channel 1
Output Stage
OUT1
Normal function
SCB/Overload
Open load
Short to ground
Overtemperature
Channel 2
GND
OUT2
25.06.2003
1 page  
Preliminary Datasheet TLE 6214 L
Current Sense Precision (single channel)3
ID = 1A – 5A; UCO1 ≥ 2V
Functional Description
I FB / I OUT
PIS
0.9 1.0 1.1
mA
/A
The TLE 6214 L is a dual-low-side power switch which has two parallel inputs to control the 2
power DMOS switches, as well as by an 8-Bit SPI for control and diagnostic feedback. The
power transistors are protected1) against short circuit, overload (current limitation), overtem-
perature and against overvoltage by an active zener clamp. The IC has a load current propor-
tional current output for current control applications.
The diagnostic logic recognises a fault condition which can be read out via the SPI or the par-
allel status outputs (depending on the IC configuration).
Output Stage Control: Parallel Control or SPI Control
The Output stages can be controlled by parallel Inputs or by SPI command. The IC can be pro-
grammed (by SPI) to switch the outputs according to the parallel input signal, to the corresponding SPI
command bit or to a combination of these two signals.
Both, parallel inputs and respective SPI databits are high
IN 1,2
active.
Truth table for Output control
Input control sig-
Output Channel n
nal Channel n
parallel SPI
parallel serial logic
Input
Bit
control control OR
00
off off off
01
off on on
10
on off on
11
on on on
logic
AND
off
off
off
on
Each output is independently controlled by an output latch.
A logic high input ‘data bit’ turns the respective output chan-
nel ON, a logic low ‘data bit’ turns it OFF.
AND
OR
Serial Input bits
command „channels on / off“
Output
Driver
Switching speed / Slew rate:
The switching speed / slew rate of both channels can be configured by SPI for slow or fast switching
speed (1:5) for each channel individually.
Overtemperature Behaviour:
Each channel has an overtemperature sensor and is individually protected against overtemperature.
As soon as overtemperature occurs the channel is immediately turned off (without fault filtering time)
and the overtmperature information is reported by diagnosis. In this case there are two different behav-
iours of the affected channel that can be selected by SPI (for all channels generally).
Autorestart: as long as the input signal of the channel remains on (e.g. parallel input high) the channel
turns automatically on again after cooling down.
Latching: After overtemperature shutdown the channel stays off until the overtemperature latch is re-
set by a new LÆH transition of the input signal.
Note: The overtemperature sensors of the output channels are only active if the channel is turned on.
As soon as the IC temperature (Temperature of the whole IC) reaches a specified level an overtem-
perature warning will be indicated.
1 )The integrated protection functions prevent an IC destruction under fault conditions and may not be used in
normal operation or permanently.
V2 Preliminary
Page 5
25.06.2003
5 Page 
Preliminary Datasheet TLE 6214 L
Diagnostic Table
In general the status follows the input signal in normal operating conditions.
If any error is detected the status is inverted.
Operating Condition
Con- Power
trol Output
Input
Sleep Mode
Normal function
Short to ground1)
“off”
Open load1)
Under current1)
“off”
“on”
Overload or short to supply1)
(Current limit 1 / Limitation)
Overload or short to supply2)
(Current limit 2 / Shutoff)
Overtemperature
(Restart mode)
Overtemperature
(Latch mode)
X
L
H
L
H
L
H
H
H
H
H
off
off
on
off
on
off
on
on
off
off 3)
off 4)
Filter
time
td(fault)
td(fault)
td(fault)
td(fault)
td(fault)
td(off)
no
no
Status FAULT SPI diagnostic
Output Output
feedback
Channel
Diagnostic
bits
Channel
overtemp
. flag
MSB LSB
L H- - -
L H HH L
H H HH L
H L LL L
L L LH L
H L LH L
L L LH L
L L HL L
L L HL L
L L HL H
L L HL H
Note 1) Short to ground/open load/ under current /overload/short-to-supply - events shorter than min.
time td(fault) will not be latched and not reported at the diagnosis pins.
Note 2) Overload/short-to-supply - events shorter than min. time td(off) will not be latched and not
reported at the diagnosis pins.
Note 3) Off as long as overtemperature occurs, restart after cooling down.
Note 4) Shutdown latch reset by falling input edge
V2 Preliminary
Page 11
25.06.2003
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet TLE6214L.PDF ] | |
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