ICE3RBR0665JZ Datasheet, PDF (29/31 Pages) Infineon Technologies AG – Off-Line SMPS Current Mode Controller with integrated 650V

ICE3RBR0665JZ
Schematic for recommended PCB layout
9 Schematic for recommended PCB layout
L
Spark Gap 1
FUSE1
X-CAP
C1
Spark Gap 3
L1
GND
Spark Gap 2
N
Spark Gap 4
C2 C3
Y-CAP
Y-CAP
BR1
C4
Y-CAP
C11
bulk cap
TR1
R11
C12
D11
D11
R12
IC11
CS
DRAIN
F3
BA
CoolSET ^VCC
GND
FB
NC
C13
C15
*
C14
Z11
C16
R13
R14
D13
D21
C21
R21
R23 R22
C22
C23
R24
Vo
GND
IC12
F3 CoolSET schematic for recommended PCB layout
IC21
R25
Figure 35 Schematic for recommended PCB layout
General guideline for PCB layout design using F3/F3R CoolSET^® (refer to Figure 35):
1. “Star Ground “at bulk capacitor ground, C11:
“Star Ground “means all primary DC grounds should be connected to the ground of bulk capacitor C11
separately in one point. It can reduce the switching noise going into the sensitive pins of the CoolSET^® device
effectively. The primary DC grounds include the followings.
a. DC ground of the primary auxiliary winding in power transformer, TR1, and ground of C16 and Z11.
b. DC ground of the current sense resistor, R12
c. DC ground of the CoolSET^® device, GND pin of IC11; the signal grounds from C13, C14, C15 and collector
of IC12 should be connected to the GND pin of IC11 and then “star “connect to the bulk capacitor ground.
d. DC ground from bridge rectifier, BR1
e. DC ground from the bridging Y-capacitor, C4
2. High voltage traces clearance:
High voltage traces should keep enough spacing to the nearby traces. Otherwise, arcing would incur.
a. 400V traces (positive rail of bulk capacitor C11) to nearby trace: > 2.0mm
b. 600V traces (drain voltage of CoolSET^® IC11) to nearby trace: > 2.5mm
3. Filter capacitor close to the controller ground:
Filter capacitors, C13, C14 and C15 should be placed as close to the controller ground and the controller pin
as possible so as to reduce the switching noise coupled into the controller.
Guideline for PCB layout design when >3KV lightning surge test applied (refer to Figure 35):
1. Add spark gap
Spark gap is a pair of saw-tooth like copper plate facing each other which can discharge the accumulated
charge during surge test through the sharp point of the saw-tooth plate.
a. Spark Gap 3 and Spark Gap 4, input common mode choke, L1:
Gap separation is around 1.5mm (no safety concern)
Version 2.0
29
7 Jun 2013