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23
2
PGND
High-current power ground
3
NDRV2
O
Bottom MOSFET gate drive output in dual forward
converter
4
GNDA
Low-current signal ground
5
CT
I
Timing capacitor of high frequency oscillator
6
LCT
I
Timing capacitor of set LPWM frequency
7
ADJ
I
Control command input –DC
8
ENA
I
Enable input
9
VSEN
I
Voltage sense feedback
10
CMP_SST
I
Soft start and loop compensation capacitor
11
ISEN
I
Current sense feedback
12
VREF
O
Reference voltage output
13
VIN
I
Supply voltage for IC
14
HSB
I
High side driver buffer output
15
PDRV3
O
Top MOSFET gate drive output in dual forward converter
16
PDRV1
O
Top MOSFET gate drive output in dual forward converter
7.3 U104 (TSU16AK)
Pin Symbol
I/O
Description
1
LVBOM
O
B-Link Negative LVDS Differential Data Output
2
GND
Ground
3
BYPASS
For External Bypass Capacitor
4
NC
Not connected
5
NC
Not connected
6
BUSTYPE
IN
Low : Serial bus; High : Direct bus
7
NC
Not connected
8
NC
Not connected
9
NC
Not connected
10
GND
Ground
11
VDDP
O
Digital Output Power
12
NC
Not connected
13
NC
Not connected
14
NC
Not connected
15
NC
Not connected
16
NC
Not connected
17
NC
Not connected
18
VDDC
I
Digital Core Power
19
GND
Ground
20
GND
Ground
21
VDDP
O
Digital Output Power
22
NC
Not connected
23
NC
Not connected
24
NC
Not connected
25
NC
Not connected
26
NC
Not connected
27
NC
Not connected
28
NC
Not connected
29
NC
Not connected
30
AD0
I/O
DDR direct bus AD0; 4mA driving strength
31
AD3
I/O
DDR direct bus AD3; 4mA driving strength
32
HWRESET
I
Hardware reset; active high
VA702-2_VA721-3_VA721b-3