HA16163T Datasheet, PDF (13/30 Pages) Renesas Technology Corp – Synchronous Phase Shift Full-Bridge Control IC

HA16163T
Oscillator
The oscillation frequency of the oscillator is set by means of a resistance connected between the RT pin and GND. The
following graph shows the relationship between the external resistance and the oscillation frequency. The typical value
of the oscillation frequency is given by the following equation.
fosc =
1
30p[F] × RT[Ω] + 50[ns]
[Hz]
10000
fosc vs. RT
SYNC pin: open
1000
CSYNC = 5pF
100
HA16163
SYNC
(2.7V)
RT
RT
GND
10
10
100
RT (kΩ)
1000
Figure 6
Place the resistor for connection to the RT pin as close to the pin as is possible. Please design the pattern so that the
level of cross-talk from other signals is minimized.
Synchronized Operation
Parallel synchronized operation is possible by connecting the SYNC pins of HA16163s. In this case, up to four slave
ICs can be connected to one master IC. A value of at least twice the master RT value should be set for the slave IC RT
values.
HA16163
MASTER
(2.7V)
RT SYNC
RT
GND
HA16163
SLAVE
(2.7V)
SYNC RT
GND
2*RT
HA16163
SLAVE
(2.7V)
SYNC RT
Max. 4 slaves
GND
2*RT
Figure 7 Parallel Synchronized Operation
Rev.5.0, Mar.15.2004, page 13 of 29