TK65600B Toko America Incorporated, TK65600B Datasheet - Page 11

• Manufacturer Part Number: TK65600B
• Description: Inductive White Led Driver
• Manufacturer: Toko America Incorporated

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As wtih all switching power converters, care should be given to the circuit board layout. The
bolded lines, on the schematic below, show where the high current paths of switched currents are
in the circuit. The circuit board traces for these paths should be short and wide to minimize the
power losses and electromagnetic interference generated from the switching currents. Therefore
C
layout should keep the sense resistor close to the IC such that there is no voltage differences in the
ground references. The (AGND) Analog Ground and the Power Ground (PGND) should short as
close to the device as possible.
July 2, 2003 TOKO, Inc.
IN
, L and C
ON/OFF
ENABLE
OUT
V BATTERY
should be located close to the IC in the circuit board layout. Also, the circuit board
A2
ENABLE
V REF
OSC
1 F
PWM
APPLICATION NOTES
GATE DRIVE
B1
A1
V DD
AGND
SCP/OVP
L=D3313FB-22 H Coil
22 H
C2
C3
IND
PGND
C1
B3
V OUT
FB
1 F
33
TK65600B
I LED
Page 11