Datasheet

L6229
10/25
verse recovery of the freewheeling diodes. The L6229 provides a 1µs Blanking Time t
BLANK
that inhibits the
comparator output so that the current spike cannot prematurely retrigger the monostable.
Figure 10. PWM Current Controller Simplified Schematic
Figure 11. Output Current Regulation Waveforms
DRIVERS
+
DEAD TIME
S
Q
R
DRIVERS
+
DEAD TIME
DRIVERS
+
DEAD TIME
OUT
3
OUT
2
SENSE
B
SENSE
A
R
SENSE
D02IN1380
RCOFF
R
OFF
C
OFF
VREF
OUT
1
+
+
-
-
1µs
5mA
BLANKER
SENSE
COMPARATOR
MONOSTABLE
SET
2.5V
5V
FROM THE
LOW-SIDE
GATE DRIVERS
BLANKING TIME
MONOSTABLE
VS
B
VS
VS
A
TO GATE
LOGIC
(0) (1)
OFF
BC
DDA
t
ON
t
OFF
BC
ON
2.5V
0
Slow Decay Slow Decay
1µs t
BLANK
t
RCRISE
t
RCRISE
SYNCHRONOUS RECTIFICATION
1µs t
BLANK
5V
V
RC
V
SENSE
V
REF
I
OUT
V
REF
R
SENSE
D02IN1351
t
OFF
1µs t
DT
1µs t
DT
t
RCFALL
t
RCFALL