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參數(shù)資料
| 型號(hào)： | DB62 |
| 廠商： | Apex Microtechnology Corporation |
| 英文描述： | DEMONSTRATION BOARD FOR SA305EX |
| 中文描述： | 演示板的SA305EX |
| 文件頁數(shù)： | 3/6頁 |
| 文件大小： | 533K |
| 代理商： | DB62 |
APEX MICROTECHNOLOGY CORPORATION TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
3
EVALUATION KIT FOR
SA305EX
DB62
SPECIAL CONSIDERATIONS
a) 6 schottky diodes D1-D6 (2 for each output provided with
DB62) are recommended for use as external flyback diodes
because of superior reverse recovery characteristics. Please
note that in the DB62, jumpers are needed in order to con-
nect the external schottky diodes (see EVAL49 layout).
b) External RC snubber circuits (R13 and C5, R16 and C8,
R19 and C10 in EVAL49 schematic) can provide noise
immunity especially in high load current scenarios. A 100
V 4.7nF capacitor in series with a 50 ohm 5W resistor
(provided with kit) is recommended for the snubber to be
connected between each output and PGND.
The power dissipated in the snubber components can be
estimated by;
P = V2 C FSW
Where
P is the power dissipated
V is the VS supply voltage
C is the snubber capacitor value (15nF)
FSW is the switching frequency.
GROUNDING CONSIDERATIONS
The EVAL49 has three separate ground paths for signal
ground (SGND), power ground (PGND) and digital ground
(DGND). SGND and PGND are the ground paths for the
SA305 while the DGND is for the MCU and related circuitry.
These grounds need to be connected on the board by putting
a jumper between SGND and DGND and another between
PGND and DGND. These jumpers are located in the center
of the board on the right of the SA305. Do not connect the
grounds at any other points to avoid ground loops and un-
wanted voltage drops.
PARTS LIST
Apex Part #
EVAL49
Description, Vendor
PC Board, Apex
Qty
1
OX7R105KWN
1μF Cap, Novacap
4
MS06
Pin Socket
1
MS11
Socket Strip
1 Bag
(Black) 151-203-RC
Test Point
Mouser
3
(White) 151-201-RC
Test Point
Mouser
5
110-13-328-41-001000
DIP28 Socket
Mill-Max
1
(White) 571-0600
4mm single PCB socket
Deltron
16
(Red) 571-0500
4mm single PCB socket
Deltron
3
(Black) 571-0100
4mm single PCB socket
Deltron
3
ECG-EVQPAC07K
Push Button Switch,
Panasonic
3
3352W-1-102
Potentiometer,
Bourns
2
50SQ100
Schottky Diodes,
International Rectifier
6
140-ESRL100V100
100uF cap,
Xicon
2
MCU-305
PIC18F2331-1/SP-ND
Microchip
1
CFRN60D1001FRE6
1K Ohm Resistor,
(R23,R24.R25)
5% 0.25W
3
RN60D4701FB14
4.7K Ohm Resistor,
(R1, R2, R3, R6)
5% 0.25W
4
CFI-4C1R0J
1 Ohm Resistor,
(R5, R10)
5% 0.25W
2
RN60D2000FB14
200 Ohm Resistor,
(R17, R18, R20,
R21, R22, R26)
5% 0.25W
6
WP63GD
WP631D
(Optional Components: Refer to SA305U for details)
Green LED's,
(D8-D12)
5
Red LED, (D7)
1
Apex Part #
HWRE06
Description, Vendor
Includes the following:
Qty
HS32
Heatsink,
Apex
1
CLAMP05
Clip,
Apex
1
TW12
Thermal Washer,
Apex
1 Box
C062K472K2X5CA
4.7 nF Capacitor,
Kemet
3
286-51-RC
50 ohm 5W resistor,
Xicon
3
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