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參數(shù)資料
| 型號： | HA16163T |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | Synchronous Phase Shift Full-Bridge Control IC |
| 中文描述： | 同步移相全橋控制IC |
| 文件頁數(shù)： | 16/30頁 |
| 文件大?。?/td> | 294K |
| 代理商： | HA16163T |
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HA16163T
Rev.5.0, Mar.15.2004, page 16 of 29
Subinterval:2
As SD is turned off at point t1, the primary-side current flows into resonant capacitance Cr2. At this time Cr2 is
charged, and therefore the potential of V12 rises. Considering that the exciting current and the L1 and L2 ripple
currents are considerable smaller than Io, the following is an approximate equation for the slope of V12.
dV12
dt
N
Cr2
=
[V/s]
(1)
0.5 Io
1
Here, N is the ratio of the primary coil to the secondary coil (N = N1/N2), and Io is the output current.
As SE and SF are on, the transformer secondary side is in the shorted state, and the value of the current flowing up
to that time is retained.
SC
SD
SE
SF
V12
VOUT
SA
Lr
L1
L2
SB
Cr1
Cr2
V11
VIN
Subinterval: 2
Subinterval:3
SC is turned on at point t2. ZVS operation can be attained by setting the SD off (t2)
→
SC on (t3) delay to the
optimal value. This delay time can be expressed by equation (2).
N
0.5 Io
Cr2
VIN
TD2 =
[s]
(2)
After SC is turned on, the transformer primary side is in the shorted state, and therefore the current value
immediately after SC was turned on is retained.
SC
SD
SE
SF
V12
VOUT
SA
Lr
L1
L2
SB
Cr1
Cr2
V11
VIN
Subinterval: 3
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