<Dual-In-Line Package Intelligent Power Module>
1200V Mini DIPIPM with BSD Series APPLICATION NOTE
Publication Date: September 2015
14
[N-side UV Protection Sequence]
a1. Control supply voltage V
D
exceeds under voltage reset level (UV
Dr
), but IGBT turns ON by next
ON signal (L
H).
(IGBT of each phase can return to normal state by inputting ON signal to each phase.)
a2. Normal operation: IGBT ON and carrying current.
a3. V
D
level dips to under voltage trip level. (UV
Dt
).
a4. All N-side IGBTs turn OFF in spite of control input condition.
a5. Fo outputs for the period set by the capacitance C
FO,
but output is extended during V
D
keeps below UV
Dr
.
a6. V
D
level reaches UV
Dr
.
a7. Normal operation: IGBT ON and outputs current.
Fig.2-2-4 Timing chart of N-side UV protection
[P-side UV Protection Sequence]
a1. Control supply voltage V
DB
rises. After the voltage reaches under voltage reset level UV
DBr
,
IGBT turns on by next ON signal (L
H).
a2. Normal operation: IGBT ON and outputs current.
a3. V
DB
level drops to under voltage trip level (UV
DBt
).
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
DB
level reaches UV
DBr
.
a6. Normal operation: IGBT ON and outputs current.
Fig.2-2-5 Timing Chart of P-side UV protection
UV
Dr
RESET
SET
RESET
UV
Dt
a1
a2
a3
a4
a6
a7
a5
Control input
Protection circuit state
Control supply voltage V
D
Output current Ic
Error output Fo
Control input
Protection circuit state
Control supply voltage V
DB
Output current Ic
Error output Fo
UV
DBr
RESET SET
RESET
UV
DBt
Keep High-level (no fault output)
a1
a2
a3
a4
a5
a6
