HA16163T_08 RENESAS [Renesas Technology Corp], HA16163T_08 Datasheet - Page 20

• Manufacturer Part Number: HA16163T_08
• Description: Synchronous Phase Shift Full-Bridge Control IC
• Manufacturer: RENESAS [Renesas Technology Corp]

HA16163T
Application
Note: All voltage, current, time shown in the diagram are typical value.
Sample application circuits are given here. Confirmatory experiments should be carried out when applying these
examples to products.
Slope Compensation
In order to improve the unstable operation characteristic of current mode, voltage slopes in a current sense signal can be
superimposed. The following is a possible slope compensation method.
Driving a Pulse Transformer
OUT-A through OUT-F of this IC are CMOS outputs that use Vref as their power supply. When directly driving a
pulse transformer, the Vref voltage fluctuates according to the exciting current. As Vref fluctuation may make internal
circuit operation unstable, direct drive of a pulse transformer should be avoided.
• Case 1 (NG)
REJ03F0001-0600 Rev.6.00 Jul 01, 2008
Page 20 of 29
The figure below shows a case where a pulse transformer is driven directly. Vref voltage fluctuation occurs due to
the exciting current.
OUT-D
OUT-A
5V(VREF)
Current sense signal
Cref
Vref
Circuitry
Internal
HA16163
Compensated signal
Case 1 (NG)
Figure 12
OUT-E
OUT-B
OUT-C
Vref value fluctuates due to
this exiting current
RAMP
0.4V
HA16163
Comparator
Q
−
+
R
S
RES