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PDF TLE6710 Data sheet ( Hoja de datos )
| Número de pieza | TLE6710 | |
| Descripción | Airbag Combined Power Supply and Firing Circuit | |
| Fabricantes | Infineon Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TLE6710 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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www.DataShVersion B
May 04, 2001
1 page  
Datasheet
TLE 6710
Calculation formulas:
Capacitor charge current:
ICOSc = 7 × IROS = 7 × VROS = 140 µA
12 12 RROS
Capacitor discharge current:
Peak to peak voltage on pin COS:
ICOSd = − 7 × IROS = − 7 × VROS = 840 µA
2 2 RROS
VCOSpp = VROS = 1.2 V
Saw tooth rise time:
Saw tooth fall time:
tr = VCOSpp × CCOS = 12 × RROS × CCOS
ICOSc
7
tf = VCOSpp × CCOS = 2 × RROS × CCOS
ICOSd
7
Oscillator frequency calculation:
fOS
1
tr tf
foffset
5%
2
1
CCOS
RROS
foffset
5%
foffset ...Frequency offset of the PCB depending on the layout of each application.
Boost Converter (30V):
A boost converter generates a supply voltage for the airbag firing system, adjustable via external resistors between
15V and 33V. An inductance L is PWM-switched by an integrated current limited DMOS-power-transistor with a
frequency of 100kHz. The reference section provides a 2.8V voltage for the regulation loop. An error amplifier
compares the reference voltage with the feedback signal TVZ, which comes from an external divider network used to
determine the output voltage EVZ.
Application note for programming the output voltage on pin EVZ:
VEVZ 2.8V RVZ1 RVZ2
RVZ2
Version B
May 05, 2001
page 4
5 Page 
Datasheet
TLE 6710
Mode definition: The TLE 6710 can be configured in two modes. The difference between the two modes are the
definitions of the hardware pins HSEN_EN12, LSEN_EN34 and MODE for the functions of firing and squib
measurements (see chapter J.2). A Mode1 operation requires an initializing SPI ‘Mode command’ (FExx)H and a ‘high’
on pin MODE before starting with SPI instructions. Otherwise the control and diagnostic commands will not be
decoded. A MODE0 operation requires no SPI ‘Mode command’ however a ‘low’ or ‘open’ on pin MODE (due to a pull
down resistor). With a hardware reset RESQ=0 the ASIC will return to its default state of the MODE0.
The following table shows the principle:
Mode
pin: MODE SPI: Mode command
MODE0 0 or open
MODE1
1
(FExx)H
TLE6710
MODE:
MODE0:‘low‘
MODE1:‘high‘
Serial Peripheral Interface (SPI) and Decoder Logic:
Version B
Timing of the Serial Peripheral Interface (SPI):
May 05, 2001
page 10
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TLE6710.PDF ] | |
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