TLD5097EL_15 Datasheet, PDF (23/41 Pages) Infineon Technologies AG – Multitopology LITIX Power DC/DC Controller IC

Infineon® LITIX™ Power
TLD5097EL
Protection and Diagnostic Functions
Input
Condition
Overvoltage @
Output
Open Load
Open Feedback
Overtemperature
Undervoltage @
Input
Level *
False
True
False
True
False
True
False
True
False
True
*Note:
Sw = Switching
False = Condition does not exist
True = Condition does exist
Figure 9-2 Diagnosis Truth Table
ST
H or Sw*
L
H or Sw*
L
H or Sw*
L
H or Sw*
L
H or Sw*
L
Output
SWO
Sw*
L
Sw*
L
Sw*
L
Sw*
L
Sw*
L
IVCC
Active
Active
Active
Active
Active
Active
Active
Shutdown
Active
Shutdown
Overvoltage
Compartor
Feedback Voltage
Error Amplifier
V_BO
Open Circuit 3
R_OVH
OVFB
9
V_OVFB,TH
R_OVL
FBH
6
FBL
7
+
V_REF
-
Open Circuit 1
R_FB
Open Circuit 2
D₁
D₂
D₃
D₄
D₅
D₆
D₇
D₈
D₉
D₁₀
Open Circuit 4
Output Open Circuit Conditions
Open Circuit
Condition
1
Fault Condition
Open FBH
Fault Threshold Voltage
V_REF
-20 to -100 mV
2
Open FBL
0.5 to 1.0 V
3
Open VBO
-20 to -100 mV
4
Open LEDGND Detected by overvoltage
V_REF
Max Threshold = 1.0 V
Min Threshold = 0.5 V
Typical V _REF = 0.3 V
Max Threshold = -20 mV
Min Threshold = -100 mV
Figure 9-3 Open Load and Open Feedback Conditions
Data Sheet
23
Revision 1.0
2015-03-12