Gpinx Direct Drive Control - Infineon TLD7002-16SYS EVAL User Manual

TLD7002-16SYS_EVAL board
User guide
2 Quick start
2.3

GPINx direct drive control

1. Close JVS_VL to use a single power supply (or use 2 power supplies for VS and VLED_REV)
2. Connect the GND at the - terminal of a 6 V to 20 V 500 m A power supply
3. Connect VS_REV to the + terminal of the power supply
4. Connect GPIN0 or GPIN1 test points to VDD5V test point directly to VBAT or to the VDD test point
5. The respective GPIN0 or GPIN1 OTP configuration, pre-written in the OTP, will light up
Note that in addition, the fail safe configuration remains active, unless correct HSLI messages are received from
the TLD7002-16 kicking the watchdog.
GPIN1a
GPIN0a
GPIN1b
GPIN0b
-
+
Figure 4 TLD7002-16SYS_EVAL GPIN0 direct control with 1 supply only
GPIN are not intended for PWM transfer to the LED, but only as activators of the output, and the output will
produce a pre-defined duty cycle, which is stored on the OTP configuration.
Which LED are turned on when a GPIN is "logic high" are stored in the GPIN0_MAP and GPIN1_MAP OTP
registers, Which duty cycle is produced at the outputs (mapped to that GPIN) when the GPINx "HIGH" is
applied, is the one stored in DC0_OUTi and DC1_OUTi registers.
GPINx have 2 options for control:
• PWM decoding enabled: can use an Input PWM Signal to either Enable or Disable LED output
- Interprets an input PWM Duty Cycle < 25% as OFF, Disabling GPINx mapped outputs
- Interprets an input PWM Duty Cycle > 75% as ON, Enabling GPINx mapped outputs
• PWM decoding disabled: can use static Input HIGH or LOW Signal to Enable or Disable LED outputs
- HIGH → Disabling GPINx mapped outputs
- LOW → Enabling GPINx mapped outputs
If PWM decoding is disabled on the OTP configuration; which is the case for the TLD7002-16SYS_EVAL, and the
user applies a duty cycle at the GPIN0, this may result in a flicker. The flicker is as a result of the device sampling
the GPIN0 in random points of the PWM input signal, and therefore it is possible that the output turns ON (with
duty specified on DC0_OUTi ) or outputs turn OFF.
User guide
JVS_VL
closed
8
GPIN1a
GPIN0a
GPIN1b
GPIN0b
Revision 1.00
2023-05-29