MPQ18913

– 30V, 0.3A High Frequency Transformer Driver

PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE

MPQ18913 Rev. 0.8

MonolithicPower.com

13

12/8/2021

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

Preliminary Specifications Subject to Change

© 2021 MPS. All Rights Reserved.

PCB LAYOUT GUIDELINES(9)

Efficient PCB layout is critical for standard

operation and EMI performance. For the best

results, refer to Figure 4 and follow the guidelines

below:

1. Place the input capacitor, Vcc capacitor and

BST capacitor as close to the corresponding

pins as possible

2. Place the FREQ resistor as close to the FREQ

pin as possible. Use short and direct trace to

connect the resistor to FREQ pin. The other

terminal

of

FREQ

resistor

should

be

connected to AGND.

3. Connect AGND to power GND through single

point connection.

4. Minimize the area of switch nodes on both

primary side and secondary side to reduce

EMI emission.

5. Place the input filter at the bottom layer to

improve EMI performance.

Note:

9) The recommended layout is based on the typical application

circuit (see Figure 5).

Top Layer

Mid-Layer 1

Mid-Layer 2