Datasheet

LED Driver with Integrated MOSFET
for MR16 and Other 12V AC Input Lamps
Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
V
FB
vs. DUTY CYCLE FOR BUCK-BOOST
MAX16840 toc01
DUTY CYCLE (%)
V
FB
(mV)
908070605040
160
170
180
190
200
210
150
30 100
IQ vs. TEMPERATURE
MAX16840 toc02
TEMPERATURE (°C)
IQ (mA)
0.6
0.4
0.2
10 35 60 85 110
0.8
1.0
1.2
1.4
1.6
0
IQ vs. V
IN
MAX16840 toc03
V
IN
(V)
IQ (mA)
45403530252015105
0.5
1.0
1.5
2.0
0
50
OSCILLATOR FREQUENCY
vs. TEMPERATURE
MAX16840 toc04
TEMPERATURE (°C)
f
SW
(kHz)
11085603510
50
100
150
200
250
300
0
ULVO
IN
vs. TEMPERATURE
MAX16840 toc05
TEMPERATURE (°C)
V
IN
RISING AND FALLING
85603510
5.3
5.2
5.1
5.4
5.5
5.6
5.7
5.8
5.0
110
V
IN
RISING
V
IN
FALLING
V
FB
vs. TEMPERATURE-
COMPATIBILITY MODE
MAX16840 toc06
TEMPERATURE (°C)
V
FB
(mV)
85603510
175
170
165
180
185
190
195
200
150
155
160
110
MAX16840 toc07
V
REFI
(V)
V
FB
(mV)
0.80.60.40.2
250
200
150
100
50
0
1.4 1.61.21.0
V
FB
vs. V
REFI
MAX16840
4
Maxim Integrated