AN-31
+
+
U2
DPA-Switch
DPA-Switch
U2
D
S
L
D
S
L
CONTROL
CONTROL
C
C
X
F
X
F
PI-3468-042303
PI-3469-042303
DC Input Derived
Transformer Bias (unregulated)
(a)
(b)
+
+
U2
DPA-Switch
U2
DPA-Switch
D
L
D
S
L
CONTROL
CONTROL
C
C
S
X
F
X
F
Transformer Bias (regulated)
(d)
Output Coupled Inductor Bias
PI-3470-042303
PI-3471-042303
(c)
Figure 2. Methods for Generation of Bias Voltage.
Output Rectifiers
in greater detail in a separate section. Ultra-fast PN junction
diodes are not suitable at DPA-Switch operating frequencies.
OutputrectificationmaybeaccomplishedwithdiscreteSchottky
diodes for lowest cost or synchronous rectifiers for highest
efficiency. This document discusses synchronous rectification
C
7/04
3
POWERINT [ Power Integrations ]
