TK11811 データシートの表示（PDF） - Toko America Inc
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TK11811 Datasheet PDF : 8 Pages
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TK11811
TEST CIRCUIT
R1
VIN
10 KΩ
VIN
T
C1
+
10 µF
C2 0.1 µF
FB
3
1
L
R2
Di
OSC
22 KΩ
4
6
L: Toko 395KN-0369AQ
GND
VOUT
VOUT
+
C3
10 µF
RIPPLE FILTER
Rf
+
Cf
Note: This test circuit is effective at high load currents. By changing C2 from 3300pF to 0.1 µF, the converter operates in the burst mode. The apparent
frequency of operation drops (70 to 100 kHz) and a larger output ripple occurs during burst mode operation. A ripple filter consisting of Cf and Rf can
be added to the output to reduce noise. The values of Cf and Rf should be determined experimentally based on the design parameters. The output
voltage will drop slightly due to Rf.
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise specified.
OUTPUT VOLTAGE VS.
OUTPUT CURRENT
EFFICIENCY VS. OUTPUT
CURRENT
5
100
4
1.4 V
3
2
0.8 V
1.2 V
1 VIN = 0.6 V
1.0 V
0
0
2
4
6
8 10
IOUT (mA)
1.4 V
50
1.0 V 1.2 V
VIN = 0.6 V 0.8 V
0
0
5
10
IOUT (mA)
January 1999 TOKO, Inc.
Page 5
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