NXP Semiconductors NVT2008PW, User Manual

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UM10541 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
User manual Rev. 1 — 7 March 2012 4 of 7
NXP Semiconductors
UM10541
NVT2008PW and NVT2010PW demo boards
2. Hardware description
2.1 Schematic
The demo boards contain footprints for the NVT2008PW and NVT2010PW devices, the
jumpers, headers, and passive components are shared. The NVT2008PW and
NVT2010PW demo board schematic is shown in
Figure 2 . Pins 2 and 3 on J1 must be
shorted to enable the part. Pins 1 and 12 on J2 are power and GND for the low voltage
side. Pins 1 and 12 on J4 are power and GND for the high voltage side. All Bn I/O pins on
the right side have 10 k
Ω
pull-up resistors to VREFB and all An I/O pins on the left side
have 10 k
Ω
pull-up resistors to VREFA through jumper J3. A shunt must be installed at J3
if VREFB
−
VREFA < 1 V. If VREFB
−
VREFA
≥
1 V, then the J3 jumper should be open
and resistors R2 through R11 must be removed. If they are not removed, then a resistive
path exists between the A-side I/Os that can impact the efficiency and signal integrity of
the solution.
Fig 2. NVT2008PW and NVT2010PW demo board schematic
002aag943
NVT2010PW
0.1 μF
R1
1
10 kΩ
R10
10 kΩ
R9
10 kΩ
R8
10 kΩ
R7
10 kΩ
R6
10 kΩ
low voltage
A-side
Jumper J3:
ON: if VREFB − VREFA < 1 V
OFF: if VREFB − VREFA ≥ 1 V
(R2 to R11 pull-up resistors
must be removed)
R1
200 kΩ
C1
high voltage
B-side
2 3 1
J1
Jumper J1:
2-3: switch enable
1-2: switch disable
open: switch enable control input to J1-2
B1
B2
B3
B4
B5
B6
22
21
20
19
17
18
VREFB
23
EN
24
A1
A2
A3
A4
A5
A6
3
4
5
6
8
7
VREFA
2
GND
1
U1
B7
B8
B9
B10
16
15
13
14
A7
A8
A9
A10
9
10
12
11
BUS_A[1:10] BUS_B[1:10]
EN_VB
A10 A9 A8 A7 A6 A5 A4 A3 A2 A1
R5
10 kΩ
R4
10 kΩ
R3
10 kΩ
R2
10 kΩ
12
J3
A1
A2
A3
A4
A5
A6
2
3
4
5
7
6
A7
A8
A9
A10
8
9
11
10
VREFA
1
GND
12
J2
R21
10 kΩ
R20
10 kΩ
R19
10 kΩ
R18
10 kΩ
R17
10 kΩ
R16
10 kΩ
B1 B2 B3 B4 B5 B6 B7 B8 B9 B10
R15
10 kΩ
R14
10 kΩ
R13
10 kΩ
R12
10 kΩ
B2
B3
B4
B5
B6
B7
3
4
5
6
8
7
B1
2
VREFB
1
J4
B8
B9
B10
GND
9
10
12
11
GND
NVT2008PW
B1
B2
B3
B4
B5
B6
18
17
16
15
13
14
VREFB
19
EN
20
A1
A2
A3
A4
A5
A6
3
4
5
6
8
7
VREFA
2
GND
1
U2
B7
B8
12
11
A7
A8
9
10
MA12-1 MA12-1