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Full-bridge converter for UPS
2
2
D
PAK/ D
PAK-7 kit
UG_1801_PL16_1802_225559
1.2
Schematic
A schematic of the demo board is shown in Figure 3. In the demo board, four MOSFETs (IRFS7430) are used. D
pin packages can be used if they are desired for evaluation. Two IRS2186 drivers are used to drive four MOSFETs.
Only two PWM signals are needed to control timing of the switching of the four MOSFETs. D1~4 four diodes are
used to have a slow turn-off to avoid high V
PowerIN
PowerIN
HOV1
C1
+
2700uFx50V
PRTN
PRTN
PRTN
TP5
PRNT
D6
2
1
R15
C9
C3
1.2
0.1uF 50V
47uF, 50V
TP3
PWM2
TP4
GND
J2
BIAS+15V
BIAS +15V
C7
+
0.1uF 50V
J3
GND
Figure 3
Schematic of the demo board
1.3
Layout
The demo board PCB has only two layers, as shown in Figure 4. Fabricated with FR4 material, both layers are 2
oz. copper with a board thickness of 62 mils (1.58 mm).
User Guide
spike during turn-off.
ds
1
2
D1
1
G_Q1
R1
47
R5
10 K
Q3
1
2
IRFS7430
D2
1
G_Q3
R2
47
R6
10 K
1mOhm
R13
open
R14
open
R17
TP6
GND
U1
5
4
BIAS +15V
Vcc
LO
6
3
Vs
COM
7
2
HOV1
HO
LIN
8
1
VbU1
Vb
HIN
IRS2186SPBF
5.1
R9
PWM2
PWM1
R10 5.1
BIAS +15V
C8
C5
0.1uF 50V
47 uF, 35V
1
2
D3
HOV2
R3
47
Q1
IRFS7430
R7
10 K
Top_Q1_S
1
2
D4
G_Q4
R4
47
D5
2
1
BIAS +15V
R16
C10
C4
1.2
HOV2
VbU2
0.1uF 50V
47 uF, 50V
TP1
PWM1
TP2
GND
C6
+
47 uF, 35V
4
Q2
IRFS7430
1
G_Q2
Vout1
Top_Q2_S
Vout2
Q4
IRFS7430
1
R8
10 K
U2
5
4
Vcc
LO
6
3
Vs
COM
7
2
HO
LIN
8
1
Vb
HIN
IRS2186SPBF
5.1
R11
PWM1
PWM2
5.1
R12
Revision 1.0
2018-03-01
2
7-
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