®
RD9
Tin yS w it c h TM
Flyback Prototyping Board
User Configurable Input and Output Voltages
Product Highlights
Unpopulated Prototyping Board
• Complete layout for construction of TinySwitch flyback
supply
• Convenient prototyping area on secondary side of board
• Single-sided construction
®
POWER
INTEGRATIONS
, INC.
1.31 in.
Tin yS w it c h RD9 Rev. B
(33.2 mm)
• RD9 boards can be combined for rapid prototyping with
RD8 (available separately)
3.86 in. (97.9 mm)
PI-2313-0092398
Figure 1. RD9 Board Overall Physical Dimensions.
Description
T1
C1
D1
®
R1
L
POWER
The RD9 is a special printed circuit board (Figure 1) designed
for rapid prototyping of TinySwitch-based flyback power
supplies in the 1-3 W range. Component positions and an
optimized layout are provided for a complete single output
power supply as shown in Figure 2. Component size and
placement are identical to evaluation board RD8. The board is
designed to accommodate a transformer using an EE16 core
with a 10 pin bobbin (Ying Chin YC-1607 or equivalent*). In
addition to the power supply circuitry, the RD9 also provides a
prototypingarea onthe secondaryside of the boardfor circuitry
such as additional outputs or voltage and current regulators.
Some typical application circuits that can be constructed using
the RD9 printed circuit board can be found in the TinySwitch
and RD8 data sheets, and Design Ideas DI-4 through DI-8.
C6
D2
INTEGRATIONS
, INC.
L1
D3
Tin yS w it c h RD9 Rev. B
C2
D4
L2
R4
C3
JMP1
C5
N
+
U1
C4
C7
VR1
U2
[Not Actual Size]
PI-2319-100898
Figure 2. PC Board Layout of the RD9.
Forextremelyrapidprototyping,theRD8TinySwitch evaluation
board and the RD9 prototyping board are perforated between
the primary and secondary circuit areas, so that the primary half
of the RD8 can be separated and combined with the secondary
half of the RD9.
* Available from B&B Products Corp +1 (520) 884-4818
September 1998
POWERINT [ Power Integrations ]
