< Dual-In-Line Package Intelligent Power Module >
Series Application note
Publication Date: September 2016
18
(3) Brake UV Protection Sequence
( with Brake product only : PSSxxMC1Fx)
a1. Control supply voltage V
D
rises. After the voltage reaches under voltage reset level UV
Dr
,
IGBT turns on by next ON signal (L
H).
a2. Normal operation: IGBT ON and collector current.
a3. V
D
level drops to under voltage trip level (UV
Dt
).
a4. IGBT of the corresponding phase only turns OFF in spite of control input signal level,
but there is no F
O
signal output.
a5. V
D
level reaches UV
Dr
.
a6. Normal operation: IGBT ON and outputs current.
Fig.2-2-6 Timing Chart of brake circuit UV protection
Control input
Protection circuit state
Control supply voltage V
D
Output current Ic
Error output Fo
UV
Dr
RESET
SET
RESET
UV
Dt
Keep High-level (no fault output)
a1
a2
a3
a4
a5
a6