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Application Note

CS150x & CS160x PCB LAYOUT GUIDELINES

1. INTRODUCTION

The CS150x & CS160x are high-performance variable frequency discontinuous conduction mode (VF-

DCM), active digital power factor correction (PFC) controllers. The CS1500/CS1501 are intended for use

in power supplies, and the CS1600/CS1601 are targeted for lighting applications.

This document describes best layout practices for these devices, using the CS1500/CS1600 &

CS1501/CS1601 90W PFC demonstration board, CDB150x as an example. This board has dual

footprints to allow either the CS1500/CS1600 or CS1501/CS1601 to be fitted. The layout guidelines

presented in this application note are also applicable to lighting designs. In this document, all references

will be to the CS1500 and CS1501.

Note: The CS1501 uses two additional pins. Pin 4 (CS) is used for current sense. Pin 5 (ZCD) is used for

zero current detection (valley switching detection). These pins are not present on the CS1500 and are not

connected. Although these functions are not present on the CS1500, the general layout principles are the

same. For a full description of these functions, please refer to the CS1501 & CS1601 data sheets

Figure 1. Schematic of a 90W PFC System with CS1500/CS1501

In the schematic above U1 refers to CS1501 and U2 refers to CS1500. Assembly instructions are

provided for using either the CS1500 or CS1501.

MUR1 60

NTC1

NO POP - SHORT WITH 28 AWG WIRE

2200pF

0.22uF

BR1

GBU4J -BP

600V

NO POP

0.33uF

MUR4 60G

600V

NTC2

NO POP, SHORT WITH AWG28 WIRE

R8 20K

CON2

TERM BLK

CON1

TERM BLK

R20

48.7K

R13

R18

1.78K

V300LA20AP

300V

IND-5MH-TSD-2796

5mH

NO POP, SHORT PIN 1-2 & PI N 3-4 wit h 28 AWG wire

IND-5MH-TSD-2796

5mH

CON3

TERM BLK

1PAD-H78P108

R19 100

100uF

ELEC

R12

R11

C10

4.7uF

VBIAS2

STB Y

IRECT

ILINK

GND

VDD

VBIAS1

CS1500-FSZ

NO POP

HS1

12.5W

C12

100pF

STP12NM50FP

NO POP, SHORT WITH AWG28 WIRE

380uH

RLCS-1007

R17

NO POP

R21

NO POP

R22

NO POP

R10

NO POP

LL4148

IFB

IAC

ZCD

GND

VDD

CS1501-FSZ

C11

33pF

R14

4.7 OHM

TP8

TP2

TP3

TP4

TP5

TP6

TP7

NO POP

R16 0

R23

R15

JP1

0.800" WI RE JUMPER

C14

1000pF

X7R

NO POP

C13

1000pF

X7R

C15

1000pF

X7R

NO POP

0.1

AN346

APR ‘11

AN346REV1

1 2 3 4 5 6 7 8

Résumé du contenu

Page 1 - Application Note

Page 2 - Risk of Electric Shock

AN3462Contacting Cirrus Logic SupportFor all product questions and inquiries contact a Cirrus Logic Sales Representative. To find the one nearest to y

Page 3 - 2. PCB LAYOUT

AN34632. PCB LAYOUTFigure 1 and Figure 2 show a schematic and layout for a 90W PFC stage. The board is a single-layer PCBwith through-hole components

Page 4 - 3. IC GROUNDING PRACTICES

AN34642.2 Placement of the CS1501 Relative to the Power Stage– The IC should be placed away from power switching devices & traces.– Placing the IC

Page 5

AN34653.1 Decoupling of Sensitive Pins for CS1501PFC Controllers have certain pins that are considered noise sensitive. For the CS1501 these are:–Pin

Page 6

AN34663.2 Decoupling of Sensitive Pins for CS1500IAC (pin 3) and FB (pin 4) are noise-sensitive pins. Again, care must be taken to route these signals

Page 7 - 3.3.2 Option 2

AN34673.3 Routing for ZCD and CS Pins for CS1501The ZCD and the CS pins are the most sensitive pins on the IC. Since the sources of these signals arec

Page 8 - 3.3.4 Option 4

AN34683.3.3 Option 3 This is very similar to option 2, but in this case, a 33 pF capacitor is added in parallel to a 4.7 uF VDDdecoupling capacitor. T

Modèles reliés CS150x

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Cirrus-logic CS160x Manuel d'utilisateur

Naviguer en ligne ou télécharger Manuel d'utilisateur pour Matériel Cirrus-logic CS160x. Cirrus Logic CS160x User Manual Manuel d'utilisatio

Résumé du contenu

Modèles reliés CS150x

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Produits connexes et manuels pour Matériel Cirrus-logic CS160x