12V Automotive LED - Relay - Motor Control Multichannel low and high side SPI Driver IC TLE75008-ESD (SPIDER Plus) - Capacitive Load with Inrush Current Mode
Open online SPICE simulator circuit link: atv_12v_LED_lighting_valve_motor_driver_spider_TLE75602-ESH_capacitive_load.TSC
Coding tables for SPI registers
Application notes
12V Automotive LED, Relay & Motor Control Smart Switch
SPI Driver IC TLE75602-ESH (SPIDER+)
Capacitive Load with Bulb Inrush Mode
- Change simulation time:
"Analysis->Transient: Start - End Display"
- Double click on the green window to enter design criteria
- Click on "Run" and Simulate Transient
The PSpice model has implemented the thermal behavior for one JEDEC standard: 2s2p.
Change the value of model parameter THERMAL_MODEL accordingly:
THERMAL_MODEL=1 - 2s2p PCB
THERMAL_MODEL=0 - self-heating deactivated
The TLE75602-ESH is a 2 channel low-side and 6 configurable channel Smart SPI Switch in
PG-TSDSO-24 package providing embedded protective functions. It is specially
designed to control relays and LEDs in automotive and industrial applications.
A serial peripheral interface (SPI) is utilized for control and diagnosis of the loads
as well as of the device. For direct control and PWM there are two input pins available
connected to two outputs by default. Additional or different outputs can be controlled
by the same input pins (programmable via SPI).
This test bench is configured to switch capacitive loads.
The feature shows the concept of charging capacitive loads using the retry mechanism.
There are many factors impacting the behavior and charging time of the capacitor like:
- capacitor ESR
- wire inductance
- over load channel switch OFF delay
- retry timing
For a proper dimensioning, please check against real measurements.
- Channel 2 is configured to switch a capacitive load including ESR and wire inductance.
Related SPI registers to BIM:
- BIM_OUTn: BIM channel activation
Binary coded signals
Fault flag (OT or OVL): ERRn_reg
Fault latch clear: HWCR_OCL_reg
Open Load Detection in OFF-State: DIAG_IOL_reg
Output Status Monitor: DIAG_OSM_reg
Open Load at ON state: DIAG_OLON_OUTn_reg
Bulb Inrush Mode: BIM_OUTn_reg
PWM Generator channel control: PWM_OUTn_reg
PWM Generator channel mapping: PWM_MAP_reg
CH7 CH6 CH5 CH4 CH3 CH2 CH1 CH0 | signal
0 0 0 0 0 0 0 0 | 0
0 0 0 0 0 0 0 1 | 1
0 0 0 0 0 0 1 0 | 2
0 0 0 0 0 0 1 1 | 3
0 0 0 0 0 1 0 0 | 4
0 0 0 0 0 1 0 1 | 5
0 0 0 0 0 1 1 0 | 6
0 0 0 0 0 1 1 1 | 7
0 0 0 0 1 0 0 0 | 8
................................|........
1 1 1 1 1 1 1 0 | 254
1 1 1 1 1 1 1 1 | 255
Switching channels in parallel
HWCR_PAR_reg register coding
HWCR_PAR0=1 CH0 & CH2
HWCR_PAR1=1 CH1 & CH3
HWCR_PAR2=1 CH4 & CH6
HWCR_PAR3=1 CH5 & CH7
HWCR_PAR_reg | HWCR_PAR3 HWCR_PAR2 HWCR_PAR1 HWCR_PAR0
0 | 0 0 0 0
1 | 0 0 0 1
2 | 0 0 1 0
3 | 0 0 1 1
4 | 0 1 0 0
5 | 0 1 0 1
6 | 0 1 1 0
7 | 0 1 1 1
8 | 1 0 0 0
..............|........................................
14 | 1 1 1 0
15 | 1 1 1 1
Model Application Note
Evaluation Board: TLE75602-ESH DB
Product info: TLE75602-ESH
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