RD9

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

• RD9 boards can be combined for rapid prototyping with

RD8 (available separately)

Description

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

addition to the power supply circuitry, the RD9 also provides a

prototyping area on the secondary side of the board for 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.

For extremely rapid prototyping, the RD8 TinySwitch 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

®

Flyback Prototyping Board

TinySwitch

September 1998

Figure 1. RD9 Board Overall Physical Dimensions.

PI-2313-0092398

1.31 in.

(33.2 mm)

3.86 in. (97.9 mm)

POWER

®

Figure 2. PC Board Layout of the RD9.

TM

PI-2319-100898

POWER

®

TinySwitch RD9 Rev. B

L2

C2

R1

C3

T1

U2

D4

D3

C7

C4

C6

U1

L1

L

C5

D2

VR1

C1

JMP1

N

R4

D1

+

[Not Actual Size]