IR21531_15 Datasheet, PDF (6/9 Pages) International Rectifier – SELF-OSCILLATING HALF-BRIDGE DRIVER

IR21531(D)(S) & (PbF)
Functional Block Diagram for IR21531(S)
R_T
R
+
-
R
+
-
R/2
+
C_T
-
R/2
RQ
SQ
LOGIC
UV
DETECT
DEAD
TIME
PULSE
GEN
DEAD
TIME
HV
LEVEL
SHIFT
PULSE
FILTER
Q
R
S
DELAY
15.6V
V_B
HO
V_S
V_CC
LO
COM
Functional Block Diagram for IR21531D
R_T
R
+
-
R
+
-
R/2
+
C_T
-
R/2
RQ
SQ
LOGIC
UV
DETECT
NOTE: The D1 is a separate die.
DEAD
TIME
PULSE
GEN
DEAD
TIME
HV
LEVEL
SHIFT
PULSE
FILTER
Q
R
S
DELAY
15.6V
V_B
HO
V_S
D1
V_CC
LO
COM
6
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