BTS54040-LBF_15 Datasheet, PDF (41/67 Pages) Infineon Technologies AG – SPI Power Controller

BTS54040-LBF
Diagnosis
Table 9 Operation Modes ¹⁾
Operation Mode
Input Level
OUT.OUTn
Normal Operation (Channel OFF) L / 0
Short Circuit to GND
(OFF-state)
Thermal shut down
Short Circuit to V_S
Open Load
Output Current
Level Sense
V_OUT I_IS
GND Z
GND Z
Z
Z
V_S
Z
Z
Z
Error Flag
ERR_COUNTERn²⁾
0
0
0²⁾
0
0
Warning DCR.SBM
Flag
bit
ERRn³⁾
0
1
0
1
0²⁾
X
0
0
0
X
Normal Operation (Channel ON)
Current Limitation
Dynamic or Absolute Thermal
Limitation
→ Channel switched OFF
H/1
(ON-state)
~V_S
< V_S
Z
I_L / k_ILIS 0
Z
0
Z
0
0
0
0
X
1
X
Dynamic or Absolute Thermal
Limitation n_retry reached
→ Channel latched OFF
Z
Z
1²⁾
1
X
Short Circuit to GND
~GND Z
0
0
1
Short Circuit to V_S
V_S
< I_L / k_ILIS 0
0
0
Open Load
V_S
Z
0
0
0
1) L = “low” level, H = “high” level, Z = high impedance, potential depends on leakage currents and external circuit.
X = undefined.
2) The over temperature flag is set latched and can be cleared by setting HWCR.CTC = 1_B.
3) The warning flags are latched until they are reset (see HWCR.RCR description).
8.1
Diagnosis Word at SPI
Diagnostic information about the status of each channel is provided through SPI. In the Standard Diagnosis the
ERR_MUX bit reports if there is a channel which had already enough restarts to reach the maximum allowed
number of retries n_retry (P_7.7.17). If 2 or more channels are latched OFF due to that, ERR_MUX bits aren't enough
to identify which channels are OFF. In such cases, it is possible to get an overview channel by channel using
ERR_COUNTERn bits in Errors Diagnosis (see Chapter 9.6.2)
It is possible to check if one or more channels had some retries during switching ON, although the limit of n_retry was
not reached. An overview channel by channel of thermal counter status is available using ERRn bits in Warnings
Diagnosis (see Chapter 9.6.3).
For both ERR_COUNTERn and ERRn the information on channel n is given at bit n-1 (e.g. bit 0 indicates status of
channel 1).
Data Sheet
41
Rev. 2.1, 2014-12-05