SP6121CN-L Datasheet, PDF (27/42 Pages) Sipex Corporation – Low Voltage, Synchronous Step Down PWM Controller

Experimental Data
VIN I IN
(V) (A)
5.0 0.924
4.5 0.999
4.2 1.080
4.0 1.138
3.8 1.204
3.6 1.279
3.4 1.367
3.2 1.471
3.0 1.601
VOUT
(V)
3.796
3.794
3.793
3.792
3.791
3.79
3.789
3.788
3.788
IOUT = 1.0A
VSENSE IOUT Ripple Effi
(mV) (mA) (mV) (%)
154.8 1032 22 84.8
154.8 1032 22 87.1
154.8 1032 22 86.3
154.7 1031 20 85.9
154.5 1030 20 85.3
154.3 1029 20 84.7
154.1 1027 20 83.8
153.9 1026 20 82.6
153.8 1025 20 80.9
Effi to LED
(%)
81.3
83.5
82.8
82.4
81.9
81.2
80.3
79.2
77.6
VIN I IN
(V) (A)
5.0 1.385
4.5 1.530
4.2 1.649
4.0 1.740
3.8 1.845
3.6 1.972
3.4 2.121
3.2 2.310
3.0 2.544
VOUT
(V)
3.940
3.940
3.930
3.925
3.920
3.918
3.918
3.918
3.919
IOUT = 1.5A
VSENSE IOUT Ripple Effi
(mV) (mA) (mV) (%)
150.8 1508 20 85.8
150.2 1502 20 86.0
149.7 1497 23 84.9
149.4 1494 25 84.3
149.3 1493 25 83.5
149.3 1493 25 82.4
149.6 1496 23 81.3
149.9 1499 23 79.5
150.5 1505 22 77.3
Effi to LED
(%)
82.5
82.7
81.7
81.0
80.3
79.3
78.2
76.4
74.3
Nov 28 06 AppNote: SP6121 as a Synchronous Buck-Boost LED Driver
Page 7
© 2006 Sipex Corporation